WO2022017235A1

WO2022017235A1 - Communication method and apparatus

Info

Publication number: WO2022017235A1
Application number: PCT/CN2021/106273
Authority: WO
Inventors: 姚楚婷; 徐海博; 才宇
Original assignee: 华为技术有限公司
Priority date: 2020-07-24
Filing date: 2021-07-14
Publication date: 2022-01-27
Also published as: CN113973358A

Abstract

The present application relates to a communication method and apparatus. The method comprises: a first terminal device receiving a first identifier, wherein the first identifier is an identifier of a second terminal device, the second terminal device provides a relay service for the first terminal device, and the first identifier is used for determining a paging occasion of the second terminal device; the first terminal device sending a first message to a first core network device, wherein the first message comprises a first identifier, and the first message is used for requesting to update an identifier of the first terminal device according to the first identifier; and the first terminal device receiving a second identifier from the first core network device, wherein the second identifier is the updated identifier of the first terminal device, and the second identifier is used for determining a paging occasion of the first terminal device. By means of implementing the present application, a paging occasion of a first terminal device can be aligned with a paging occasion of a second terminal device to the greatest possible extent, such that the second terminal device does not wake up again at an additional time due to same monitoring the paging of the first terminal device, thereby reducing the power consumption of the second terminal device.

Description

A communication method and device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 202010725935.1 and the application title "a communication method and device" filed with the State Intellectual Property Office of China on July 24, 2020, the entire contents of which are incorporated into this application by reference middle.

technical field

The present application relates to the field of communication technologies, and in particular, to a communication method and apparatus.

Background technique

At present, in addition to communicating with the base station directly, the terminal equipment can also communicate with the base station through other terminal equipment. For example, in a public safety scenario, a relay terminal device can act as a relay for a remote terminal device, so that the remote terminal device can communicate with the base station through the relay terminal device. The technology is called user equipment to network relay (UE to network relay, UE2NW relay) technology.

Under this technique, the remote terminal equipment can receive paging from the network through the relay terminal equipment. Specifically, in addition to monitoring the paging of the relay terminal device, the relay terminal device also monitors the paging for the remote terminal device, and sends the paging of the remote terminal device to the remote terminal device.

In order to monitor the paging of the remote terminal device, the relay terminal device needs to monitor on the paging occasion (PO) of the remote terminal device. However, the PO of the relay terminal device and the remote terminal device may be different, so the relay terminal device needs to wake up and monitor the paging of the remote terminal device in an extra time besides the PO of the relay terminal device. Increased power consumption of relay terminal equipment.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a communication method and apparatus for reducing power consumption of a terminal device.

A first aspect provides a first communication method, the method comprising: a first terminal device receiving a first identifier from a second terminal device, where the first identifier is an identifier of the second terminal device, wherein the first The second terminal device provides relay services for the first terminal device, and the first identifier is used to determine the paging occasion of the second terminal device; the first terminal device sends a first message to the first core network device , the first message includes the first identifier, and the first message is used to request to update the identifier of the first terminal device according to the first identifier, and the first core network device serves the first A terminal device; the first terminal device receives a second identifier from the first core network device, where the second identifier is an updated identifier of the first terminal device, and the second identifier is used to determine the The paging occasion of the first terminal device.

The method may be performed by a first communication apparatus, and the first communication apparatus may be a communication apparatus or a communication apparatus, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method. Exemplarily, the first communication apparatus is a terminal device, or a chip provided in the terminal device for implementing the function of the terminal device, or other components for implementing the function of the terminal device. In the following introduction process, it is assumed that the first communication apparatus is a terminal device, for example, a first terminal device.

The PO of a terminal device is related to the identification of the terminal device. If the identifications of two terminal devices are different, the POs of the two terminal devices may be different. For this reason, in this embodiment of the present application, the first terminal device may request the first core network device to update the identity of the first terminal device, because the first core network device obtains information based on the identity of the second terminal device (for example, the first identity) If the identity of the first terminal device is updated, the paging occasion determined according to the updated identity of the first terminal device (for example, the second identity) may be the same as the paging occasion determined according to the first identity, or it may be are relatively close in time domain. If the two paging occasions are the same, the second terminal device can monitor both the paging of the first terminal device and the paging of the second terminal device at the same paging occasion, without monitoring at additional paging occasions, Helps to reduce the power consumption of the second terminal device; or, if the two paging occasions are relatively close in the time domain, the second terminal device does not need to go to sleep after monitoring the paging of one of the terminal devices state, but to enter the sleep state after the paging monitoring of the other terminal equipment is completed. Since the paging timings of the two terminal equipments are relatively close in the time domain, the function brought by this waiting of the second terminal equipment The power consumption can be smaller than the power consumption caused by waking up after the second terminal device sleeps. Therefore, this can also reduce the power consumption of the second terminal device.

With reference to the first aspect, in a first optional implementation manner of the first aspect, the first message further includes first range information, where the first range information is used to indicate a first range, the first range is the value range of the identity of the first terminal device, or the range to which the time domain distance between the paging occasion determined according to the first identity and the paging occasion determined according to the second identity belongs.

For a terminal device, if it needs to monitor paging at a certain PO, the terminal device will wake up at the PO and monitor the paging. However, the terminal device may not enter the sleep state immediately after the PO ends. For example, the terminal device can perform other operations after waking up, such as measuring reference signals, etc. It will continue to work for a period of time and then go to sleep. Therefore, the first terminal device may send the first range information to the first core network device, where the first range information may indicate the first range, and the first range is, for example, the identifier of the first terminal device (here, the first core network The value range of the identification to be allocated by the equipment), if the identification of the first terminal equipment belongs to the first range, then the paging occasion determined according to the identification of the first terminal equipment will be located within the time when the second terminal equipment wakes up, For example, the first identification may belong to the first scope; or, the first scope is, for example, the PO determined according to the first identification and the PO determined according to the identification of the first terminal device (here, the identification to be allocated by the first core network device) If the time domain distance between the two POs belongs to this range, the PO of the first terminal device will also be within the time when the second terminal device wakes up. Then, the first core network device can allocate a new identity to the first terminal device according to the first identity and the first range, which can make the selection range larger and the allocation more flexible when selecting the new identity.

With reference to the first optional implementation manner of the first aspect, in the second optional implementation manner of the first aspect, the method further includes:

The first terminal device receives the first range information from the second terminal device.

The second terminal device knows the time when the second terminal device wakes up, so the first range can be determined by the second terminal device, which can make the first range more in line with the actual working conditions of the second terminal device. After determining the first range information, the second terminal device can send the first range information to the first terminal device, so that the first terminal device can then send the first range information to the first core network device.

In combination with the first optional implementation manner of the first aspect or the second optional implementation manner of the first aspect, in the third optional implementation manner of the first aspect, the The paging occasion is the same as the paging occasion determined according to the second identification, or the time domain distance between the paging occasion determined according to the first identification and the paging occasion determined according to the second identification is smaller than the a threshold.

For example, if the UE_ID corresponding to the second identifier is the same as the UE_ID corresponding to the first identifier, then the paging occasion determined according to the first identifier and the paging occasion determined according to the second identifier may be the same, then the second terminal device can In the same paging occasion, both the paging of the second terminal device and the paging of the first terminal device are monitored, and there is no need to wake up at an extra time to monitor the paging for the first terminal device, which can reduce the function of the second terminal device. consumption. Or, although the UE_ID corresponding to the first identifier is different from the UE_ID corresponding to the first identifier, the second identifier belongs to the first range, or, there is a difference between the paging occasion determined according to the first identifier and the paging occasion determined according to the second identifier The time-domain distance belongs to the first range (or in other words, the first core network device is the second identifier determined according to the first range and the first identifier), then the second terminal device only needs to wake up once to be able to The terminal device monitors the paging, and does not need to wake up multiple times to monitor the paging, which can also reduce the power consumption of the second terminal device.

In combination with the first aspect or any one of the optional embodiments of the first optional embodiment of the first aspect to the third optional embodiment of the first aspect, the fourth optional embodiment of the first aspect In an optional implementation manner, the first message further includes a first cause value, and the first cause value is used to indicate that the first terminal device is a remote terminal device.

The first message may also include a first cause value, and the first cause value may indicate that the first terminal device is a remote terminal device, or in other words, instruct the second terminal device to provide relay services for the first terminal device, so the first terminal device The identity of the first terminal device needs to be set according to the identity of the second terminal device (ie, the first identity). In this way, the first core network device can specify the reason for updating the identification for the first terminal device.

In combination with the first aspect or any optional embodiment from the first optional embodiment of the first aspect to the fourth optional embodiment of the first aspect, in the fifth optional embodiment of the first aspect In selected embodiments, the method further comprises:

receiving, by the first terminal device, a first cycle from the second terminal device, where the first cycle is a DRX cycle of the second terminal device;

When the length of the second cycle is less than the length of the first cycle, the first terminal device sends a second message to the second terminal device, the second message includes the second cycle, the second The period is the DRX period of the first terminal device.

If the first terminal device receives the first cycle, the first terminal device may determine the magnitude relationship between the second cycle and the first cycle, where the second cycle is the DRX cycle of the first terminal device. If the second period is greater than or equal to the first period, then the second terminal equipment does not need to know the DRX period of the first terminal equipment. paging, so in this case, the first terminal device may not send the DRX cycle of the first terminal device (ie, the second DRX cycle) to the second terminal device. Or, if the second period is less than the first period, that is, the DRX period of the remote terminal equipment is less than the DRX period of the relay terminal equipment, in this case, if the second terminal equipment does not know the DRX period of the first terminal equipment, Instead, the paging is monitored for the first terminal device according to the first cycle, and some paging may be missed. For example, the first period is 1.28 seconds, the second period is 640 milliseconds, and the core network device pages the first terminal device at an interval of 640 milliseconds. If the second terminal device listens every 1.28 seconds, it may miss Paging of the first terminal device. Therefore, if the second period is smaller than the first period, the first terminal device may send the second period to the second terminal device to reduce the probability that the second terminal device misses the paging of the first terminal device.

With reference to the fifth optional implementation manner of the first aspect, in the sixth optional implementation manner of the first aspect, the second message is further used to instruct to modify the length of the DRX cycle to the second cycle length.

The second message may further instruct to modify the length of the DRX cycle to the length of the second cycle, then the second terminal device may negotiate with the second core network device to change the DRX cycle of the second terminal device. Therefore, the second terminal device can monitor both the paging of the second terminal device and the paging of the first terminal device according to the same DRX cycle, and does not need to work according to multiple DRX cycles, which helps to unify the behavior of the second terminal device. .

In combination with the first aspect or any optional embodiment from the first optional embodiment of the first aspect to the sixth optional embodiment of the first aspect, in the seventh optional embodiment of the first aspect In an optional implementation manner, the second identifier is carried in a configuration update message, or in a registration complete message.

The first core network device sends the second identifier to the first terminal device, which may be sent through a different message. For example, if the first terminal device sends a registration request message to the first core network device in advance (for example, the first message is a registration request message), then the first core network device may carry the second identifier in the registration completion message and send it to the first core network device. a terminal device. Alternatively, regardless of whether the first terminal device has sent a registration request message to the first core network device in advance, the first core network device may send the second identifier carried in the configuration update message to the first terminal device. Alternatively, the first core network device may also send the second identifier to the first terminal device through other messages.

In combination with the first aspect or any one of the optional embodiments from the first optional embodiment of the first aspect to the seventh optional embodiment of the first aspect, in the eighth optional embodiment of the first aspect In selected embodiments, the method further comprises:

The first terminal device sends the second identification to the second terminal device, where the second identification is used for the second terminal device to monitor paging for the first terminal device.

After obtaining the second identification, the first terminal device may send the second identification to the second terminal device. In this way, when the second terminal device monitors paging for the first terminal device, if it monitors a paging message, it can determine whether the paging message includes the second identifier, and if it includes the second identifier, it indicates that the first terminal device is being paged If the paging message does not include the second identifier, indicating that the first terminal device is not paged, the second terminal device does not need to send the paging message to the first terminal device. The paging message is sent to the first terminal device, for example, the second terminal device can discard the paging message. In this way, information interaction between the second terminal device and the first terminal device can be reduced, transmission overhead can be saved, redundant information received by the first terminal device can also be reduced, and the validity of the information received by the first terminal device can be improved. .

In combination with the first aspect or any one of the optional embodiments from the first optional embodiment of the first aspect to the eighth optional embodiment of the first aspect, in the ninth optional embodiment of the first aspect In the selected embodiment, the first identifier is the first value, and the first value is the value of (5G-S-TMSI mod 1024) of the second terminal device, wherein mod represents the modulo operate.

The first identification may be the (5G-S-TMSI mod 1024) of the second terminal device, or the first identification may also be the 5G-S-TMSI of the second terminal device, etc., as long as the second terminal can be determined according to the first identification The paging time of the device is sufficient.

In combination with the first aspect or any one of the optional embodiments from the first optional embodiment of the first aspect to the ninth optional embodiment of the first aspect, in the tenth optional embodiment of the first aspect In selected embodiments, the method further comprises:

The first terminal device sends a request message to the access network device, where the request message is used to request to enter the RRC disconnected state;

A confirmation message from the access network device is received, where the confirmation message is used to instruct the first terminal device to enter the RRC disconnected state.

The RRC disconnected state is, for example, an RRC idle state or an RRC inactive state. Monitoring paging is generally an action when the terminal device is in the RRC disconnected state, so the first terminal device can enter the RRC disconnected state, so that the second terminal device can monitor the paging for the first terminal device.

In a second aspect, a second communication method is provided, the method comprising: a second terminal device sending a first identifier to a first terminal device, where the first identifier is an identifier of the second terminal device, wherein the second terminal device The terminal device provides a relay service for the first terminal device, and the first identifier is used to determine the paging occasion of the second terminal device; the second terminal device receives the second terminal device from the first terminal device. ID, the second ID is the ID of the first terminal device, and the second ID is determined according to the first ID, and the second ID is used to determine the paging of the first terminal device opportunity.

The method may be performed by a second communication apparatus, and the second communication apparatus may be a communication apparatus or a communication apparatus, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method. Exemplarily, the second communication apparatus is a terminal device, or a chip provided in the terminal device for implementing the function of the terminal device, or other components for implementing the function of the terminal device. In the following introduction process, the second communication apparatus is taken as an example of a terminal device, for example, a second terminal device.

In conjunction with the second aspect, in a first optional implementation manner of the second aspect, the method further includes:

The second terminal device sends first range information to the first terminal device, where the first range information is used to indicate a first range, and the first range is a value range of the identifier of the first terminal device , or the range to which the time domain distance between the paging occasion determined according to the first identifier and the paging occasion determined according to the second identifier belongs.

With reference to the second aspect or the first optional implementation manner of the second aspect, in the second optional implementation manner of the second aspect, the paging occasion determined according to the first identifier is different from the paging occasion determined according to the second aspect. The paging occasions determined by the identifiers are the same, or the time domain distance between the paging occasions determined according to the first identifier and the paging occasions determined according to the second identifier is smaller than the first threshold.

In combination with the second aspect or the first optional implementation manner of the second aspect or the second optional implementation manner of the second aspect, in the third optional implementation manner of the second aspect, the method further include:

determining, by the second terminal device, a paging occasion according to the second identifier;

The second terminal device monitors paging for the first terminal device according to the paging occasion.

In combination with the second aspect or any one of the optional embodiments from the first optional embodiment of the second aspect to the third optional embodiment of the second aspect, the fourth optional embodiment of the second aspect In selected embodiments, the method further comprises:

sending, by the second terminal device, a first cycle to the first terminal device, where the first cycle is the cycle of the second terminal device;

The second terminal device receives a second message from the first terminal device, the second message includes a second cycle, the second cycle is the DRX cycle of the first terminal device, and the second cycle is The length is less than the length of the first period.

With reference to the fourth optional implementation manner of the second aspect, in the fifth optional implementation manner of the second aspect, the second message is further used to instruct to modify the length of the DRX cycle to the second cycle length.

In conjunction with the fourth optional implementation manner of the second aspect or the fifth optional implementation manner of the second aspect, in the sixth optional implementation manner of the second aspect, the method further includes:

The second terminal device negotiates the DRX cycle of the second terminal device with the second core network device, wherein the length of the negotiated DRX cycle of the second terminal device is the same as the length of the second cycle, so The second core network device serves the second terminal device.

In combination with the second aspect or any one of the optional embodiments from the first optional embodiment of the second aspect to the sixth optional embodiment of the second aspect, in the seventh optional embodiment of the second aspect In the selected embodiment, the first identifier is the first value, and the first value is the value of (5G-S-TMSI mod 1024) of the second terminal device, wherein mod represents the modulo operate.

Regarding the technical effects brought by the second aspect or various optional implementations of the second aspect, reference may be made to the introduction to the technical effects of the first aspect or corresponding implementations.

In a third aspect, a third communication method is provided, the method comprising: a second terminal device receiving a first identification from a first terminal device, where the first identification is an identification of the first terminal device, the first identification used to determine the paging occasion of the first terminal device; the second terminal device sends a first message to the second core network device, where the first message includes the first identifier, and the first message is used for Request to update the identification of the second terminal device according to the first identification, the second core network device serves the second terminal device; the second terminal device receives the first information from the second core network device Two identifiers, the second identifier is the updated identifier of the second terminal device, and the second identifier is used to determine the paging occasion of the second terminal device.

The method may be performed by a third communication apparatus, and the third communication apparatus may be a communication apparatus or a communication apparatus, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method. Exemplarily, the third communication apparatus is a terminal device, or a chip provided in the terminal device for implementing the function of the terminal device, or other components for implementing the function of the terminal device. In the following introduction process, it is assumed that the third communication apparatus is a terminal device, for example, a second terminal device.

In this embodiment of the present application, the second terminal device (relay terminal device) may request the second core network device to update the identification of the second terminal device, because the second core network device is based on the identification of the first terminal device (for example, the first an identity) to update the identity of the second terminal device, then the paging occasion determined according to the updated identity of the second terminal device (for example, the second identity) may be the same as the paging occasion determined according to the first identity, Or it may be closer in the time domain, etc. If the two paging occasions are the same, the second terminal device can monitor both the paging of the first terminal device and the paging of the second terminal device at the same paging occasion, without monitoring at additional paging occasions, Helps to reduce the power consumption of the second terminal device; or, if the two paging occasions are relatively close in the time domain, the second terminal device does not need to go to sleep after monitoring the paging of one of the terminal devices state, but to enter the sleep state after the paging monitoring of the other terminal equipment is completed. Since the paging timings of the two terminal equipments are relatively close in the time domain, the function brought by this waiting of the second terminal equipment The power consumption can be smaller than the power consumption caused by waking up after the second terminal device sleeps. Therefore, this can also reduce the power consumption of the second terminal device. It can be seen that, in the embodiment of the present application, the identifier can be updated by the remote terminal device or the identifier can be updated by the relay terminal device, and the manner is relatively flexible.

With reference to the third aspect, in a first optional implementation manner of the third aspect, the first message further includes first range information, where the first range information is used to indicate a first range, the first range is the value range of the identifier of the second terminal device, or the range to which the time domain distance between the paging occasion determined according to the first identifier and the paging occasion determined according to the second identifier belongs.

For a terminal device, if it needs to monitor paging at a certain PO, the terminal device will wake up at the PO and monitor the paging. However, the terminal device may not enter the sleep state immediately after the PO ends. For example, the terminal device can perform other operations after waking up, such as measuring reference signals, etc. It will continue to work for a period of time and then go to sleep. The second terminal device knows the time when the second terminal device wakes up. Therefore, as an optional implementation manner, the second terminal device can determine a range, for example, called the first range, and can use the first range The information is sent to the second core network device. The first range is, for example, the value range of the identifier of the first terminal device (here, the identifier to be allocated by the first core network device). If the identifier of the first terminal device belongs to the first range, then according to the The paging occasion determined by the identifier will be within the time when the second terminal device wakes up, for example, the first identifier may belong to the first range; or, the first range is, for example, the PO determined according to the first identifier and the The range of the time domain distance between the POs determined by the identifier (here, the identifier to be allocated by the first core network device) belongs to, if the time domain distance of the two POs belongs to this range, then the PO of the first terminal device belongs to the range. It will also be within the time when the second terminal device wakes up. The second core network device can assign a new identifier to the second terminal device according to the first identifier and the first range information. Due to the existence of the first range information, the second core network device can select a new identifier in a larger range, and select a more It is flexible and can improve the success rate of selection.

With reference to the third aspect or the first optional implementation manner of the third aspect, in a second optional implementation manner of the third aspect, the paging occasion determined according to the first identifier is different from the paging occasion determined according to the second The paging occasions determined by the identifiers are the same, or the time domain distance between the paging occasions determined according to the first identifier and the paging occasions determined according to the second identifier is smaller than the first threshold.

In combination with the third aspect or the first optional implementation manner of the third aspect or the second optional implementation manner of the third aspect, in the third optional implementation manner of the third aspect, the first The message further includes a first cause value, where the first cause value is used to indicate that the second terminal device is a relay terminal device.

The first message may also include a first cause value, and the first cause value may indicate that the second terminal device is a relay terminal device, or in other words, instruct the second terminal device to provide a relay service for the first terminal device, so the second terminal device The identity of the second terminal device needs to be set according to the identity of the first terminal device (ie, the first identity). In this way, the second core network device can specify the reason for updating the identification for the second terminal device.

In combination with the third aspect or any one of the optional embodiments from the first optional embodiment of the third aspect to the third optional embodiment of the third aspect, the fourth optional embodiment of the third aspect can be In an optional implementation manner, the second identifier is carried in a configuration update message, or in a registration complete message.

The second core network device sends the second identifier to the second terminal device, which may be sent through a different message. For example, if the second terminal device sends a registration request message to the second core network device in advance (for example, the second message is a registration request message), the second core network device may carry the second identifier in the registration completion message and send it to the second core network device. Two terminal equipment. Alternatively, regardless of whether the second terminal device has sent a registration request message to the second core network device in advance, the second core network device may send the second identifier to the second terminal device by carrying the second identifier in the configuration update message. Alternatively, the second core network device may also send the second identifier to the second terminal device through other messages.

In combination with the third aspect or any one of the optional embodiments of the first optional embodiment of the third aspect to the fourth optional embodiment of the third aspect, the fifth optional embodiment of the third aspect In the selected embodiment, the first identifier is the first value, and the first value is the value of (5G-S-TMSI mod 1024) of the second terminal device, wherein mod represents the modulo operate.

The first identifier may be the (5G-S-TMSI mod 1024) of the first terminal device, or the first identifier may also be the 5G-S-TMSI of the first terminal device, etc., as long as the first terminal can be determined according to the first identifier The paging time of the device is sufficient.

In combination with the third aspect or any optional embodiment from the first optional embodiment of the third aspect to the fifth optional embodiment of the third aspect, in the sixth optional embodiment of the third aspect In selected embodiments, the method further comprises:

determining, by the second terminal device, a paging occasion according to the first identifier;

The second terminal device may determine a paging occasion according to the first identifier, and monitor paging for the first terminal device according to the paging occasion. Since the second identifier is also determined according to the first identifier, the paging occasion of the second terminal device may be the same as the paging occasion of the first terminal device, or the distance in the time domain may be smaller than the first threshold. The power consumption of the second terminal device due to monitoring paging for the first terminal device is reduced.

In a fourth aspect, a communication device is provided, for example, the communication device is the aforementioned first communication device. The first communication apparatus is configured to execute the method in the above first aspect or any possible implementation manner. Specifically, the first communication apparatus may include a module for executing the method in the first aspect or any possible implementation manner, for example, a processing module, and optionally, a transceiver module may also be included. Exemplarily, the transceiver module may include a sending module and a receiving module, and the sending module and the receiving module may be different functional modules, or may be the same functional module, but can implement different functions. Exemplarily, the first communication apparatus is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a terminal device, such as a first terminal device. In the following, it is taken as an example that the first communication apparatus is the first terminal device. For example, the transceiver module can also be implemented by a transceiver, and the processing module can also be implemented by a processor (or a processing circuit). Alternatively, the sending module may be implemented by a transmitter, the receiving module may be implemented by a receiver, and the transmitter and the receiver may be different functional modules, or may be the same functional module but capable of implementing different functions. If the first communication apparatus is a communication device, the transceiver is implemented by, for example, an antenna, a feeder, a codec and the like in the communication device. Alternatively, if the first communication device is a chip provided in the communication device, the transceiver (or the transmitter and the receiver) is, for example, a communication interface in the chip, and the communication interface is connected with the radio frequency transceiver component in the communication device to Send and receive information through radio frequency transceiver components. In the introduction process of the fourth aspect, the first communication apparatus is continued to be the first terminal device, and the processing module, the sending module, and the receiving module are used as examples for introduction. in,

The receiving module is configured to receive a first identifier from a second terminal device, where the first identifier is an identifier of the second terminal device, wherein the second terminal device provides the first terminal device with a middle Following service, the first identifier is used to determine the paging occasion of the second terminal device;

The sending module is configured to send a first message to a first core network device, where the first message includes the first identifier, and the first message is used to request to update the first terminal according to the first identifier The identification of the device, the first core network device serves the first terminal device;

The receiving module is further configured to receive a second identifier from the first core network device, where the second identifier is an updated identifier of the first terminal device, and the second identifier is used to determine the first terminal device. The paging occasion of a terminal device.

With reference to the fourth aspect, in a first optional implementation manner of the fourth aspect, the first message further includes first range information, where the first range information is used to indicate a first range, the first range is the value range of the identity of the first terminal device, or the range to which the time domain distance between the paging occasion determined according to the first identity and the paging occasion determined according to the second identity belongs.

With reference to the first optional implementation manner of the fourth aspect, in a second optional implementation manner of the fourth aspect, the receiving module is further configured to receive the first range information.

In combination with the first optional implementation manner of the fourth aspect or the second optional implementation manner of the fourth aspect, in the third optional implementation manner of the fourth aspect, the The paging occasion is the same as the paging occasion determined according to the second identification, or the time domain distance between the paging occasion determined according to the first identification and the paging occasion determined according to the second identification is smaller than the a threshold.

In combination with the fourth aspect or any one of the optional embodiments of the first optional embodiment of the fourth aspect to the third optional embodiment of the fourth aspect, the fourth optional embodiment of the fourth aspect can be In an optional implementation manner, the first message further includes a first cause value, and the first cause value is used to indicate that the first terminal device is a remote terminal device.

In combination with the fourth aspect or any one of the optional embodiments of the first optional embodiment of the fourth aspect to the fourth optional embodiment of the fourth aspect, in the fifth optional embodiment of the fourth aspect In selected embodiments,

The receiving module is further configured to receive a first cycle from the second terminal device, where the first cycle is the DRX cycle of the second terminal device;

The sending module is further configured to send a second message to the second terminal device when the processing module determines that the length of the second cycle is less than the length of the first cycle, where the second message includes the first cycle. Two cycles, where the second cycle is the DRX cycle of the first terminal device.

With reference to the fifth optional implementation manner of the fourth aspect, in the sixth optional implementation manner of the fourth aspect, the second message is further used to instruct to modify the length of the DRX cycle to the second cycle length.

In combination with the fourth aspect or any one of the optional embodiments of the first optional embodiment of the fourth aspect to the sixth optional embodiment of the fourth aspect, in the seventh optional embodiment of the fourth aspect In an optional implementation manner, the second identifier is carried in a configuration update message, or in a registration complete message.

In combination with the fourth aspect or any optional embodiment of the first optional embodiment of the fourth aspect to the seventh optional embodiment of the fourth aspect, in the eighth optional embodiment of the fourth aspect In an optional implementation manner, the sending module is further configured to send the second identifier to the second terminal device, where the second identifier is used by the second terminal device to monitor for the first terminal device paging.

In combination with the fourth aspect or any one of the optional embodiments from the first optional embodiment of the fourth aspect to the eighth optional embodiment of the fourth aspect, in the ninth optional embodiment of the fourth aspect In the selected embodiment, the first identifier is the first value, and the first value is the value of (5G-S-TMSI mod 1024) of the second terminal device, wherein mod represents the modulo operate.

In combination with the fourth aspect or any one of the optional embodiments of the first optional embodiment of the fourth aspect to the ninth optional embodiment of the fourth aspect, in the tenth optional embodiment of the fourth aspect In selected embodiments,

The sending module is further configured to send a request message to the access network device, where the request message is used to request to enter the RRC disconnected state;

The receiving module is further configured to receive an acknowledgment message from the access network device, where the acknowledgment message is used to instruct the first terminal device to enter the RRC disconnected state.

Regarding the technical effects brought by the fourth aspect or various optional implementations of the fourth aspect, reference may be made to the introduction to the technical effects of the first aspect or corresponding implementations.

A fifth aspect provides a communication device, for example, the communication device is the aforementioned second communication device. The second communication device is configured to execute the method in the second aspect or any possible implementation manner. Specifically, the second communication apparatus may include a module for executing the method in the second aspect or any possible implementation manner, for example, a processing module, and optionally, a transceiver module may also be included. Exemplarily, the transceiver module may include a sending module and a receiving module, and the sending module and the receiving module may be different functional modules, or may be the same functional module, but can implement different functions. Exemplarily, the second communication apparatus is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a terminal device, such as a second terminal device. In the following, it is taken as an example that the second communication device is the second terminal device. For example, the transceiver module can also be implemented by a transceiver, and the processing module can also be implemented by a processor (or a processing circuit). Alternatively, the sending module may be implemented by a transmitter, the receiving module may be implemented by a receiver, and the transmitter and the receiver may be different functional modules, or may be the same functional module but capable of implementing different functions. If the second communication apparatus is a communication device, the transceiver is implemented by, for example, an antenna, a feeder, a codec and the like in the communication device. Alternatively, if the second communication device is a chip provided in the communication device, the transceiver (or the transmitter and the receiver) is, for example, a communication interface in the chip, and the communication interface is connected with the radio frequency transceiver component in the communication device to Send and receive information through radio frequency transceiver components. In the introduction process of the fifth aspect, continue to take the second communication apparatus as a second terminal device, and take the processing module, the sending module and the receiving module as examples for introduction. in,

The sending module is configured to send a first identification to a first terminal device, where the first identification is an identification of the second terminal device, wherein the second terminal device provides a relay for the first terminal device service, the first identifier is used to determine the paging occasion of the second terminal device;

The receiving module is configured to receive a second identification from the first terminal device, where the second identification is the identification of the first terminal device, and the second identification is determined according to the first identification , and the second identifier is used to determine the paging occasion of the first terminal device.

With reference to the fifth aspect, in a first optional implementation manner of the fifth aspect, the sending module is further configured to send first range information to the first terminal device, where the first range information is used to indicate The first range, where the first range is the value range of the identity of the first terminal device, or the range between the paging occasion determined according to the first identity and the paging occasion determined according to the second identity The range to which the time domain distance belongs.

With reference to the fifth aspect or the first optional implementation manner of the fifth aspect, in a second optional implementation manner of the fifth aspect, the paging occasion determined according to the first identifier is different from the paging occasion determined according to the second The paging occasions determined by the identifiers are the same, or the time domain distance between the paging occasions determined according to the first identifier and the paging occasions determined according to the second identifier is smaller than the first threshold.

In combination with the fifth aspect or the first optional embodiment of the fifth aspect or the second optional embodiment of the fifth aspect, in the third optional embodiment of the fifth aspect,

the processing module, configured to determine the paging occasion according to the second identifier;

The receiving module is further configured to monitor paging for the first terminal device according to the paging occasion.

Combined with the fifth aspect or any one of the optional embodiments of the first optional embodiment of the fifth aspect to the third optional embodiment of the fifth aspect, the fourth optional embodiment of the fifth aspect can be In selected embodiments,

The sending module is further configured to send a first cycle to the first terminal device, where the first cycle is the cycle of the second terminal device;

The receiving module is further configured to receive a second message from the first terminal device, where the second message includes a second cycle, the second cycle is the DRX cycle of the first terminal device, and the second The length of the period is less than the length of the first period.

With reference to the fourth optional implementation manner of the fifth aspect, in the fifth optional implementation manner of the fifth aspect, the second message is further used to instruct to modify the length of the DRX cycle to the second cycle length.

With reference to the fourth optional implementation manner of the fifth aspect or the fifth optional implementation manner of the fifth aspect, in the sixth optional implementation manner of the fifth aspect, the processing module is further configured to Negotiate the DRX cycle of the second terminal device with the second core network device, wherein the length of the negotiated DRX cycle of the second terminal device is the same as the length of the second cycle, and the second core network device Serve the second terminal device.

In combination with the fifth aspect or any one of the optional embodiments of the first optional embodiment of the fifth aspect to the sixth optional embodiment of the fifth aspect, in the seventh optional embodiment of the fifth aspect In the selected embodiment, the first identifier is the first value, and the first value is the value of (5G-S-TMSI mod 1024) of the second terminal device, wherein mod represents the modulo operate.

Regarding the technical effects brought by the fifth aspect or various optional embodiments of the fifth aspect, reference may be made to the introduction to the technical effects of the second aspect or corresponding embodiments.

In a sixth aspect, a communication device is provided, for example, the communication device is the aforementioned third communication device. The third communication apparatus is configured to execute the method in the third aspect or any possible implementation manner. Specifically, the third communication apparatus may include a module for executing the method in the third aspect or any possible implementation manner, for example, a processing module, and optionally, a transceiver module may also be included. Exemplarily, the transceiver module may include a sending module and a receiving module, and the sending module and the receiving module may be different functional modules, or may be the same functional module, but can implement different functions. Exemplarily, the third communication apparatus is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a terminal device, such as a second terminal device. For example, the transceiver module can also be implemented by a transceiver, and the processing module can also be implemented by a processor (or a processing circuit). Alternatively, the sending module may be implemented by a transmitter, the receiving module may be implemented by a receiver, and the transmitter and the receiver may be different functional modules, or may be the same functional module but capable of implementing different functions. If the third communication apparatus is a communication device, the transceiver is implemented by, for example, an antenna, a feeder, a codec and the like in the communication device. Alternatively, if the third communication device is a chip provided in the communication device, the transceiver (or the transmitter and the receiver) is, for example, a communication interface in the chip, and the communication interface is connected with the radio frequency transceiver component in the communication device to Send and receive information through radio frequency transceiver components. In the introduction process of the sixth aspect, the processing module, the sending module and the receiving module are used as examples for introduction. in,

The receiving module is configured to receive a first identification from a first terminal device, where the first identification is an identification of the first terminal device, and the first identification is used to determine the paging of the first terminal device opportunity;

The sending module is configured to send a first message to a second core network device, where the first message includes the first identifier, and the first message is used to request to update the second terminal according to the first identifier The identification of the device, the second core network device serves the second terminal device;

The receiving module is further configured to receive a second identifier from the second core network device, where the second identifier is an updated identifier of the second terminal device, and the second identifier is used to determine the first identifier. 2. The paging occasion of the terminal equipment.

With reference to the sixth aspect, in a first optional implementation manner of the sixth aspect, the first message further includes first range information, where the first range information is used to indicate a first range, the first range is the value range of the identifier of the second terminal device, or the range to which the time domain distance between the paging occasion determined according to the first identifier and the paging occasion determined according to the second identifier belongs.

With reference to the sixth aspect or the first optional implementation manner of the sixth aspect, in a second optional implementation manner of the sixth aspect, the paging occasion determined according to the first identifier is different from the paging occasion determined according to the second The paging occasions determined by the identifiers are the same, or the time domain distance between the paging occasions determined according to the first identifier and the paging occasions determined according to the second identifier is smaller than the first threshold.

In combination with the sixth aspect or the first optional implementation manner of the sixth aspect or the second optional implementation manner of the sixth aspect, in the third optional implementation manner of the sixth aspect, the first The message further includes a first cause value, where the first cause value is used to indicate that the second terminal device is a relay terminal device.

In combination with the sixth aspect or any one of the optional embodiments of the first optional embodiment of the sixth aspect to the third optional embodiment of the sixth aspect, in the fourth optional embodiment of the sixth aspect In an optional implementation manner, the second identifier is carried in a configuration update message, or in a registration complete message.

In combination with the sixth aspect or any one of the optional embodiments of the first optional embodiment of the sixth aspect to the fourth optional embodiment of the sixth aspect, in the fifth optional embodiment of the sixth aspect In a selected embodiment, the first identifier is a first value, and the first value is a value of (5G-S-TMSI mod 1024) of the first terminal device, wherein mod represents a modulo operate.

In combination with the sixth aspect or any one of the optional embodiments of the first optional embodiment of the sixth aspect to the fifth optional embodiment of the sixth aspect, the sixth optional embodiment of the sixth aspect In selected embodiments,

the processing module, configured to determine the paging occasion according to the first identifier;

Regarding the technical effects brought about by the sixth aspect or various optional embodiments of the sixth aspect, reference may be made to the introduction to the technical effects of the third aspect or corresponding embodiments.

In a seventh aspect, a communication device is provided, and the communication device is, for example, the aforementioned first communication device. The communication apparatus includes a processor (or, a processing circuit) and a communication interface (or, an interface circuit), and the communication interface may be used to communicate with other apparatuses or devices. Optionally, a memory may also be included for storing computer instructions. The processor and the memory are coupled to each other for implementing the method described in the first aspect or various possible implementation manners of the first aspect. Alternatively, the first communication device may not include the memory, and the memory may be located outside the first communication device. The processor, the memory and the communication interface are coupled to each other, and are used for implementing the method described in the first aspect or various possible implementation manners of the first aspect. For example, when the processor executes the computer instructions stored in the memory, the first communication apparatus is caused to execute the method in the first aspect or any possible implementation manner of the first aspect. Exemplarily, the first communication apparatus is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a terminal device, such as a first terminal device.

Wherein, if the first communication device is a communication device, the communication interface is realized by, for example, a transceiver (or a transmitter and a receiver) in the communication device, for example, the transceiver is realized by an antenna, a feeder and a receiver in the communication device. Codecs, etc. are implemented. Alternatively, if the first communication device is a chip provided in the communication device, the communication interface is, for example, an input/output interface of the chip, such as input/output pins, etc., and the communication interface is connected with the radio frequency transceiver component in the communication device to Send and receive information through radio frequency transceiver components.

In an eighth aspect, a communication device is provided, and the communication device is, for example, the aforementioned second communication device. The communication apparatus includes a processor (or, a processing circuit) and a communication interface (or, an interface circuit), and the communication interface may be used to communicate with other apparatuses or devices. Optionally, a memory may also be included for storing computer instructions. The processor and the memory are coupled to each other for implementing the method described in the second aspect or various possible implementation manners of the second aspect. Alternatively, the second communication device may not include the memory, and the memory may be located outside the second communication device. The processor, the memory and the communication interface are coupled to each other for implementing the method described in the above second aspect or various possible implementation manners of the second aspect. For example, when the processor executes the computer instructions stored in the memory, the second communication apparatus is caused to perform the method in the second aspect or any possible implementation manner of the second aspect. Exemplarily, the second communication apparatus is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a terminal device, such as a second terminal device.

Wherein, if the second communication device is a communication device, the communication interface is realized by, for example, a transceiver (or a transmitter and a receiver) in the communication device, for example, the transceiver is realized by an antenna, a feeder and a receiver in the communication device. Codecs, etc. are implemented. Alternatively, if the second communication device is a chip set in the communication device, the communication interface is, for example, an input/output interface of the chip, such as input/output pins, etc., and the communication interface is connected to the radio frequency transceiver component in the communication device to Send and receive information through radio frequency transceiver components.

In a ninth aspect, a communication device is provided, and the communication device is, for example, the aforementioned third communication device. The communication apparatus includes a processor (or, a processing circuit) and a communication interface (or, an interface circuit), and the communication interface may be used to communicate with other apparatuses or devices. Optionally, a memory may also be included for storing computer instructions. The processor and the memory are coupled to each other for implementing the method described in the third aspect or various possible implementation manners of the third aspect. Alternatively, the first communication device may not include the memory, and the memory may be located outside the third communication device. The processor, the memory and the communication interface are coupled to each other, and are used for implementing the method described in the third aspect or various possible implementation manners of the third aspect. For example, when the processor executes the computer instructions stored in the memory, the first communication device is caused to execute the method in the third aspect or any possible implementation manner of the third aspect. Exemplarily, the third communication apparatus is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a first device. Exemplarily, the first device is a terminal device, such as a second terminal device.

Wherein, if the third communication device is a communication device, the communication interface is realized by, for example, a transceiver (or a transmitter and a receiver) in the communication device, for example, the transceiver is realized by an antenna, a feeder and a receiver in the communication device. Codecs, etc. are implemented. Alternatively, if the third communication device is a chip set in the communication device, the communication interface is, for example, an input/output interface of the chip, such as input/output pins, etc., and the communication interface is connected with the radio frequency transceiver component in the communication device to Send and receive information through radio frequency transceiver components.

A tenth aspect provides a first communication system, the first communication system comprising the communication device of the fourth aspect or the communication device of the seventh aspect, and the communication device of the fifth aspect or the communication device of the eighth aspect the communication device described.

In an eleventh aspect, a second communication system is provided, where the second communication system includes the communication device of the sixth aspect or the communication device of the ninth aspect.

In a twelfth aspect, a computer-readable storage medium is provided, the computer-readable storage medium is used for storing a computer program, and when the computer program is executed on a computer, the computer causes the computer to execute the above-mentioned first aspect or the first A method as described in any one of the possible embodiments of the aspect.

In a thirteenth aspect, a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, the computer is made to execute the second aspect or the second aspect above. A method as described in any one of the possible embodiments of the aspect.

In a fourteenth aspect, a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program, and when the computer program is executed on a computer, the computer is made to execute the third aspect or the third aspect A method as described in any one of the possible embodiments of the aspect.

A fifteenth aspect provides a computer program product comprising instructions, the computer program product is used to store a computer program, when the computer program is run on a computer, the computer causes the computer to execute the above-mentioned first aspect or the first aspect The method described in any one of the possible embodiments of .

A sixteenth aspect provides a computer program product comprising instructions, the computer program product is used to store a computer program, when the computer program is run on a computer, the computer causes the computer to execute the above-mentioned second aspect or the second aspect The method described in any one of the possible embodiments of .

A seventeenth aspect provides a computer program product comprising instructions, the computer program product is used to store a computer program, and when the computer program is run on a computer, the computer causes the computer to execute the above-mentioned third aspect or the third aspect The method described in any one of the possible embodiments of .

In this embodiment of the present application, the first terminal device may request to update the identity of the first terminal device, so that the paging timing of the first terminal device is aligned with the paging timing of the second terminal device as much as possible, so that the second terminal device will not Listening to the paging of the first terminal device and then waking up at an extra time saves the power consumption of the second terminal device.

Description of drawings

1 is a schematic diagram of a relay scenario;

Fig. 2 is a flow chart of relay terminal equipment monitoring paging for remote terminal equipment;

3 is a schematic diagram of a specific application scenario of an embodiment of the present application;

FIG. 4 is a schematic diagram of another application scenario of an embodiment of the present application;

FIG. 5 is a flowchart of a first communication method provided by an embodiment of the present application;

6 is a schematic diagram of a time domain position of POs of two terminal devices processed according to the method provided in the embodiment of the present application;

FIG. 7 is a schematic diagram of a time domain position of POs of two terminal devices processed according to the method provided in the embodiment of the present application;

8 is a schematic diagram of a time domain location of POs of two terminal devices that are not processed according to the method provided in the embodiment of the present application;

9 is a flowchart of a second communication method provided by an embodiment of the present application;

FIG. 10 is a schematic block diagram of a first terminal device provided by an embodiment of the present application;

FIG. 11 is a schematic block diagram of a second terminal device provided by an embodiment of the present application;

FIG. 12 is another schematic block diagram of a second terminal device provided by an embodiment of the present application;

FIG. 13 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application;

FIG. 14 is another schematic block diagram of a communication apparatus provided by an embodiment of the present application;

FIG. 15 is still another schematic block diagram of a communication apparatus provided by an embodiment of the present application.

detailed description

In order to make the objectives, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Hereinafter, some terms in the embodiments of the present application will be explained, so as to facilitate the understanding of those skilled in the art.

1) Terminal devices, including devices that provide users with voice and/or data connectivity, specifically, include devices that provide users with voice, or include devices that provide users with data connectivity, or include devices that provide users with voice and data connectivity sexual equipment. For example, it may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem. The terminal equipment can communicate with the core network via a radio access network (RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN. The terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, vehicle to everything (V2X) terminal equipment , machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscription unit (subscriber unit), subscription station (subscriber) station), mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user Agent (user agent), or user equipment (user device), etc. For example, these may include mobile telephones (or "cellular" telephones), computers with mobile terminal equipment, portable, pocket-sized, hand-held, computer-embedded mobile devices, and the like. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (personal digital assistants), PDA), etc. Also includes constrained devices, such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing power, etc. For example, it includes information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), and laser scanners.

As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. Wait. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.

The various terminal devices described above, if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be considered as on-board terminal equipment. For example, the on-board terminal equipment is also called on-board unit (OBU). ).

In this embodiment of the present application, the terminal device may further include a relay (relay). Alternatively, it can be understood that any device capable of data communication with the base station can be regarded as a terminal device.

In the embodiments of the present application, the apparatus for implementing the function of the terminal device may be the terminal device, or may be an apparatus capable of supporting the terminal device to implement the function, such as a chip system, and the apparatus may be installed in the terminal device. In this embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. In the technical solutions provided by the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the terminal being a terminal device as an example.

2) Network equipment, including, for example, access network (AN) equipment, such as a base station (for example, an access point), which may refer to a device in the access network that communicates with wireless terminal equipment over the air interface through one or more cells , or, for example, a network device in a vehicle-to-everything (V2X) technology is a roadside unit (RSU). The base station may be used to interconvert the received air frames and IP packets, acting as a router between the terminal equipment and the rest of the access network, which may include the IP network. The RSU can be a fixed infrastructure entity supporting V2X applications and can exchange messages with other entities supporting V2X applications. The network device can also coordinate the attribute management of the air interface. For example, the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in the LTE system or long term evolution-advanced (LTE-A), or may also include fifth generation mobile The next generation node B (gNB) in the communication technology (the 5th generation, 5G) new radio (new radio, NR) system (also referred to as the NR system) may also include a cloud access network (cloud radio) The embodiment of the present application is not limited to a centralized unit (centralized unit, CU) and a distributed unit (distributed unit, DU) in an access network, Cloud RAN) system.

The network equipment may also include core network equipment, for example, the core network equipment includes an access and mobility management function (AMF), a session management function (SMF) or a user plane function (user plane) in the 5G system function, UPF), etc., or include a mobility management entity (mobility management entity, MME) and the like in the 4G system.

In this embodiment of the present application, the apparatus for implementing the function of the network device may be the network device, or may be an apparatus capable of supporting the network device to implement the function, such as a chip system, and the apparatus may be installed in the network device. In the technical solutions provided by the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the network device being a network device as an example.

3) Discontinuous reception (DRX) mechanism. The DRX mechanism includes a DRX cycle. During the DRX cycle, the terminal device will periodically "wake up" for a period of time, and may remain in a "sleep" state at other times in the DRX cycle to reduce power consumption. To put it simply, under the DRX mechanism, the terminal device can periodically enter the sleep state without monitoring the physical downlink control channel (PDCCH).

4) Radio resource control (radio resource control, RRC) state, the terminal equipment has three RRC states: RRC connected (connected) state, RRC idle (idle) state and RRC inactive (inactive) state.

RRC connected state (or, it can also be referred to as connected state. In this paper, "connected state" and "RRC connected state" are the same concept, and the two terms can be interchanged): the terminal device has established an RRC connection with the network, which can data transfer.

RRC idle state (or, can also be referred to as idle state. In this paper, "idle state" and "RRC idle state" are the same concept, and the two terms can be interchanged): the terminal device does not establish an RRC connection with the network, the base station The context for this end device is not stored. If the terminal device needs to enter the RRC connected state from the RRC idle state, it needs to initiate the RRC connection establishment process.

RRC inactive state (or, may also be referred to as RRC inactive state, or simply inactive state or inactive state. In this paper, "deactive state", "inactive state", "deactive state", " "Deactivated state", "inactive state", "RRC inactive state" or "RRC deactivated state", etc., are the same concept, and these terms can be interchanged): The terminal device entered the RRC connection at the anchor base station before. state, and then the anchor base station releases the RRC connection, but the anchor base station saves the context of the terminal device. If the terminal device needs to re-enter the RRC connected state from the RRC inactive state, it needs to initiate an RRC connection recovery process (or referred to as an RRC connection re-establishment process) at the base station where it currently resides. Because the terminal device may be in a mobile state, the base station where the terminal device currently resides and the anchor base station of the terminal device may be the same base station, or may be different base stations. Compared with the RRC establishment process, the RRC recovery process has shorter delay and lower signaling overhead. However, the base station needs to save the context of the terminal device, which will occupy the storage overhead of the base station.

5) The terms "system" and "network" in the embodiments of this application may be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or", which describes the relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, it can indicate that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are an "or" relationship. For example, A/B, means: A or B. "At least one item(s) below" or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one item (a) of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple .

And, unless otherwise stated, ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the size, content, order, and timing of multiple objects , priority or importance, etc. For example, the first identification and the second identification may be the same identification or different identifications, and this name does not indicate the amount of information, content, priority or importance of the two identifications. different.

Some terms and concepts involved in the embodiments of the present application are introduced above, and the technical features involved in the embodiments of the present application are introduced below.

When the terminal device is in the RRC idle state or the RRC inactive state, if the service of the terminal device has been registered in the core network, the network may page the terminal device, so the terminal device needs to monitor the paging. The terminal device can wake up on the PO of the terminal device to monitor and paging downlink control information (DCI), or monitor the PDCCH, and can sleep at other times except the PO, thereby reducing the power consumption of the terminal device. Currently, a 2-bit field is included in the paging DCI, and the field may indicate that the paging DCI includes scheduling information, a short message, or both scheduling information and a short message. The scheduling information is used for scheduling paging messages, for example, the scheduling information includes time-frequency resource information or modulation and coding information of the paging message. Short messages can indicate whether system information has changed, Earthquake and Tsunami Warning System (ETWS) notifications or Commercial Mobile Alert Service (CMAS) notifications, etc. For example, Table 1 may be referred to for an indication manner of the 2-bit field included in the paging DCI.

Table 1

After detecting the paging DCI, the terminal equipment can decode the paging DCI. If the paging DCI includes the scheduling information of the paging message, the terminal device continues to receive the paging message according to the scheduling information, or if the paging DCI does not include the scheduling information, such as only short messages, the terminal device There is no need to receive paging messages. Further, if the terminal device receives the paging message, and the paging message contains the identification of the terminal device, it indicates that the terminal device is paged, and if the terminal device receives the paging message, but the paging message does not If the identifier of the terminal device is included, it indicates that the terminal device has not been paged.

A terminal device can monitor one PO in each DRX cycle. One PO is a group of PDCCH listening opportunities, which may include multiple subframes or multiple orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols, and the PDCCH listening opportunities of one PO may span multiple radio frames. A paging frame (paging frame, PF) is a radio frame, and a PF may contain one or more POs, or a time domain start point of one or more POs. A PO may start on the PF associated with the PO, or it may start after the PF associated with the PO has ended. For example, PO 1 starts on PF 1 associated with this PO 1, PO 1 may end on PF 1, or PO 1 may span multiple radio frames, PO 1 does not end on PF 1, but on PF 1 end on the following radio frame.

The PO can be determined according to the parameters broadcast by the cell, the DRX cycle of the terminal device and the identity of the terminal device. For example, a cell broadcast parameters include one or more of the following: DRX cycle / paging cycle (paging cycle) / default paging period (default paging cycle), N, N s, or, PF_offset. Wherein, N for the total number of PF DRX cycle, the number of N _s represents a PO PF included, PF_offset for determining the offset value of PF. The identifier of the terminal device may be the international mobile subscriber identification number (IMSI) of the terminal device or the 5G-serving (serving, S)-temporary mobile subscription identifier (5G-s-temporary mobile subscription identifier, 5G-S) of the terminal device -TMSI).

The formula for calculating the PF of a terminal device defined in the current standard protocol is as follows:

(SFN+PF_offset)mod T=(T div N)*(UE_ID mod N) Formula 1

The frame whose frame number determined according to formula 1 is the system frame number (SFN) is the PF.

The calculation formula of the PO of the terminal device defined in the current standard protocol is as follows:

i_s=floor(UE_ID/N)mod Ns Formula 2

i_s determined according to Equation 2 represents the index of the PO.

The terminal device can determine the PO according to the SFN and i_s.

In the above two formulas, T represents the DRX cycle of the terminal device. Specifically, T is the minimum value of the specific (specific) DRX cycle of the terminal device and the default DRX cycle of system information broadcast. N represents the total number of PFs in the DRX cycle. N _s represents the number of POs included in a PF. PF_offset is used to determine the offset value of PF. UE_ID is the terminal device's (5G-s-TMSI mod 1024), and mod represents the modulo operation.

At present, in addition to communicating with the base station directly, the terminal equipment can also communicate with the base station through other terminal equipment. For example, in a public security scenario, a relay terminal device can act as a relay for a remote terminal device, so that the remote terminal device can communicate with the base station through the relay terminal device. This technology is called UE2NW relay technology. For example, reference may be made to FIG. 1 , which is a schematic diagram of a relay scenario. FIG. 1 includes terminal equipment 1, terminal equipment 2, access network equipment and core network equipment. The access network equipment is the access network equipment serving the terminal equipment 1, the core network equipment is the core network equipment serving the terminal equipment 1 and the terminal equipment 2, the terminal equipment 1 is the relay terminal equipment, and the terminal equipment 2 is the remote terminal equipment. The terminal device, or in other words, the terminal device 1 provides a relay service for the terminal device 2 . For the terminal device 1 to provide the relay service for the terminal device 2, it can be understood that the information sent by the terminal device 2 to the access network device is forwarded to the access network device through the terminal device 1, and the access network device sends the information to the terminal device. The information of 2 is also forwarded to the terminal device 2 through the terminal device 1.

In order to better control the remote terminal equipment and achieve better power saving effect, the remote terminal equipment can establish an end-to-end radio resource control (RRC, RRC) with the base station through the relay terminal equipment. ) connection, that is, the remote terminal device is visible to the network, so as to realize the control of the remote terminal device by the network.

Since the remote terminal equipment directly registers the services of the remote terminal equipment in the core network, when the core network equipment has the services of the remote terminal equipment, it will communicate with the remote terminal equipment through the radio access network (RAN). The end terminal device performs paging, and the remote terminal device needs to camp on the air interface to monitor paging. Since the power consumption of the Uu port is relatively large, it will bring relatively large energy consumption to the remote terminal equipment. Moreover, a typical implementation of the remote terminal device is that the remote terminal device can be implemented by a wearable device such as a smart watch or a smart bracelet. In this scenario, it is obvious that the battery capacity of the remote terminal device will not be too large. If the remote terminal device resides on the air interface to monitor paging by itself, resulting in greater power consumption, the usage of the remote terminal device will be reduced. Time, which may cause the remote terminal equipment to have insufficient power supply for normal use, or the remote terminal equipment needs to be charged frequently, which is inconvenient.

In order to solve this problem, the relay terminal equipment can monitor the paging for the remote terminal equipment, that is, the remote terminal equipment does not need to monitor the paging on the Uu interface, and the work is done by the relay terminal equipment. The relay terminal device can send the monitored paging to the remote terminal device through the PC5 interface. For example, referring to FIG. 2 , it is an implementation flow for the relay terminal equipment to monitor paging for the remote terminal equipment.

S21. The relay terminal device sends the system information to the remote terminal device, and the remote terminal device receives the system information from the relay terminal device.

The system information comes from the base station, that is, the base station broadcasts the system information, and the relay terminal device receives the system information from the base station. Afterwards, the relay terminal device forwards the system information to the remote terminal device. According to the foregoing introduction, to calculate PO and PF, it is necessary to obtain the corresponding parameters broadcast by the cell, and the system information may include these parameters. After the remote terminal device obtains these parameters, the PF and PO of the remote terminal device can be calculated.

S22, the remote terminal device sends the 5G-S-TMSI and DRX cycle to the relay terminal device, and the relay terminal device receives the 5G-S-TMSI and DRX cycle from the remote terminal device; or, the remote terminal device sends the relay The terminal device sends the PO information of the remote terminal device, and the relay terminal device receives the PO information from the remote terminal device.

The 5G-S-TMSI is the 5G-S-TMSI of the remote terminal device, the DRX cycle is the DRX cycle of the remote terminal device, and the DRX cycle is the specific DRX cycle of the remote terminal device and the default DRX cycle included in the system information the smallest of the two. That is, the remote terminal device can send the 5G-S-TMSI and DRX cycle of the remote terminal device to the relay terminal device, so that the relay terminal device can calculate the PO and PF of the remote terminal device according to the 5G-S-TMSI , and other parameters used to calculate PO and PF, which are included in the system information, can be known by the relay terminal device. Alternatively, the remote terminal device can also directly send the PO information of the remote terminal device to the relay terminal device, so that the relay terminal device can directly determine the PO of the remote terminal device.

S23. The base station sends a paging message to the relay terminal device, and the relay terminal device receives the paging message from the base station.

If the relay terminal device can determine the PO of the remote terminal device, the relay terminal device will wake up when the PO of the remote terminal device arrives, and monitor paging for the remote terminal device. If the base station needs to page the remote terminal equipment, it will also page at the PO.

For example, the paging message is used to page the remote terminal equipment. Of course, before sending the paging message, the base station will first send the paging DCI. For example, if the paging DCI includes the scheduling information of the paging message, the base station will send the paging message again. After the relay terminal device receives the paging DCI , it will also listen for paging messages again.

S24. The relay terminal device sends the paging message to the remote terminal device, and the remote terminal device receives the paging message from the relay terminal device.

The relay terminal device knows the 5G-S-TMSI of the remote terminal device, so the relay terminal device can determine whether the paging message is used for paging the remote terminal device. If it is determined that the paging message is for paging the remote terminal equipment, the relay terminal equipment sends the paging message to the remote terminal equipment.

It can be seen that, for the relay terminal equipment, in addition to monitoring the paging of the relay terminal equipment, it also monitors the paging for the remote terminal equipment, and sends the paging of the remote terminal equipment to the remote terminal equipment.

In order to monitor the paging of the remote terminal device, the relay terminal device needs to monitor the PO of the remote terminal device, and the PO of the relay terminal device and the remote terminal device may be different. Then, the relay terminal device needs to wake up and monitor the paging of the remote terminal device in the extra time except the PO of the relay terminal device, which increases the power consumption of the relay terminal device.

Therefore, there is another method, that is, after the core network device knows the binding relationship (or the relay relationship) between the remote terminal device and the relay terminal device, if it needs to page the remote terminal device , the paging information of the remote terminal equipment will be included in the paging message of the relay terminal equipment and sent. In this way, the relay terminal device only needs to monitor the paging of the relay terminal device, and when monitoring the paging of the relay terminal device, it can also receive the paging of the remote terminal device. However, in this way, the paging information of one terminal device needs to be delivered through the paging message of another terminal device, which has a great impact on the core network equipment, the system needs to be upgraded, and the implementation complexity is also relatively large.

In view of this, the embodiments of the present application also provide a technical solution. The PO of a terminal device is related to the identification of the terminal device. If the identifications of two terminal devices are different, the POs of the two terminal devices may be different. For this reason, in this embodiment of the present application, the first terminal device may request the first core network device to update the identity of the first terminal device, because the first core network device obtains information based on the identity of the second terminal device (for example, the first identity) If the identity of the first terminal device is updated, the paging occasion determined according to the updated identity of the first terminal device (for example, the second identity) may be the same as the paging occasion determined according to the first identity, or it may be are relatively close in time domain. If the two paging occasions are the same, the second terminal device can monitor both the paging of the first terminal device and the paging of the second terminal device at the same paging occasion, without monitoring at additional paging occasions, Helps to reduce the power consumption of the second terminal device; or, if the two paging occasions are relatively close in the time domain, the second terminal device does not need to go to sleep after monitoring the paging of one of the terminal devices state, but to enter the sleep state after the paging monitoring of the other terminal equipment is completed. Since the paging timings of the two terminal equipments are relatively close in the time domain, the function brought by this waiting of the second terminal equipment The power consumption can be smaller than the power consumption caused by waking up after the second terminal device sleeps. Therefore, this can also reduce the power consumption of the second terminal device.

For example, users can now own many kinds of terminal devices, such as mobile phones, smart watches, smart bracelets or smart glasses, etc. Currently, in addition to mobile phones, smart watches and other devices are also equipped with functions such as making calls, which is more convenient for users to use. For example, referring to FIG. 3 , the smart watch can establish a connection with the mobile phone, so as to access the network through the mobile phone. In this scenario, it can be considered that the mobile phone provides a relay service for the smart watch. In this scenario, the smart watch can answer calls through the mobile phone. For example, if there is an incoming call to the smart watch, the user can answer it through the mobile phone. Or, the user can make a call through the smart watch. This saves the power consumption of the smartwatch. In general, however, each terminal device needs to monitor paging. Therefore, even if the smartwatch's functions of making and receiving calls are performed through the mobile phone, and the user does not use the smartwatch, the smartwatch will still reduce a lot of power after a period of time, even if the smartwatch is in the RRC idle state or the RRC inactive state, no Data transmission, but because the smart watch needs to wake up to monitor the PO, and many monitors are useless, it will cause the smart watch to consume excess power consumption, the power will decrease faster, and the battery life will deteriorate. However, if the technical solutions of the embodiments of the present application are adopted, the smart watch can monitor the paging through the mobile phone, or the mobile phone can monitor the paging for the smart watch, so that the smart watch does not need to wake up in the PO to monitor, thereby effectively saving the smart watch’s time. power consumption.

In the various embodiments of this application, a terminal device monitors paging for another terminal device, it can be understood that a terminal device monitors paging DCI for another terminal device, or monitors paging for another terminal device DCI and paging messages. For example, the second terminal device monitoring paging for the first terminal device may include the second terminal device monitoring paging DCI for the first terminal device, or the second terminal device monitoring paging DCI and paging for the first terminal device information. In addition, in various embodiments of the present application, "the second terminal device monitors the paging for the first terminal device", this description is equivalent to "the first terminal device monitors the paging through the second terminal device". Similarly, "the first terminal device monitors the paging for the second terminal device", this description is equivalent to "the second terminal device monitors the paging through the first terminal device".

The technical solutions provided in the embodiments of the present application can be applied to a fourth generation mobile communication technology (the 4th generation, 4G) system, such as an LTE system, or can be applied to a 5G system, such as an NR system, or can also be applied to the next generation The mobile communication system or other similar communication systems are not specifically limited. In addition, the technical solutions provided in the embodiments of the present application can be applied to a device-to-device (D2D) scenario, such as an NR-D2D scenario, or can be applied to a vehicle to everything (V2X) scenario, such as NR-V2X scenarios, etc., for example, can be applied to the Internet of Vehicles, such as V2X, vehicle-to-vehicle (V2V), etc., or can be used in fields such as intelligent driving, assisted driving, or intelligent networked vehicles.

For an application scenario of the embodiment of the present application, reference may be made to FIG. 1 . In addition, referring to FIG. 4 again, it is a schematic diagram of another application scenario of the embodiment of the present application. FIG. 4 includes terminal equipment 1 , terminal equipment 2 , access network equipment, core network equipment 1 , and core network equipment 2 . The access network device is the access network device accessed by the terminal device 1, the core network device 1 is the core network device serving the terminal device 1, the core network device 2 is the core network device serving the terminal device 2, and the terminal device 1 is a relay terminal device, and terminal device 2 is a remote terminal device. In other words, terminal device 1 provides relay service for terminal device 2. For the terminal device 1 to provide the relay service for the terminal device 2, it can be understood that the information sent by the terminal device 2 to the access network device is forwarded to the access network device through the terminal device 1, and the access network device sends the information to the terminal device. The information of 2 is also forwarded to the terminal device 2 through the terminal device 1.

For example, the terminal device 2 in FIG. 1 or FIG. 4 is not within the coverage of the network, or the terminal device 2 cannot be directly served by the network, or the terminal device 2 does not have a Uu port set, so the terminal device 2 can be accessed through the terminal device 1. The internet. Of course, the terminal device 2 may also be within the coverage of the network, or the terminal device 2 may also have a Uu port or the like, and such a terminal device 2 may also access the network through the terminal device 1 .

The access network device in FIG. 1 or FIG. 4 is, for example, a base station. The access network equipment corresponds to different equipment in different systems, for example, in a 4G system, it may correspond to an eNB, and in a 5G system, it corresponds to an access network equipment in 5G, such as a gNB. Of course, the technical solutions provided in the embodiments of the present application can also be applied to future mobile communication systems, so the access network devices in FIG. 1 or FIG. 4 can also correspond to network devices in future mobile communication systems. FIG. 1 or FIG. 4 take the access network device being a base station as an example. In fact, referring to the foregoing introduction, the access network device may also be a device such as an RSU. In addition, the core network device in FIG. 1 or FIG. 4 is, for example, an AMF, or may also be other core network devices.

The methods provided by the embodiments of the present application are described below with reference to the accompanying drawings. It should be noted that, in the various embodiments of this application, any information exchange involving the terminal equipment and the core network equipment can be forwarded from the access network equipment, just because the solutions of the embodiments of this application do not involve access network equipment, so it is not mentioned below.

An embodiment of the present application provides a first communication method. Please refer to FIG. 5 , which is a flowchart of the method. In the following introduction process, the method is applied to the network architecture shown in FIG. 1 or FIG. 4 as an example.

For ease of introduction, in the following, the method is performed by a network device and a terminal device as an example. The first core network device described below is the core network device serving the first terminal device, the second core network device described below is the core network device serving the second terminal device, the first core network device and the second core network device. The core network devices may be the same core network device, or may also be different core network devices. The first core network device is, for example, the first AMF, and the second core network device is, for example, the second AMF.

If the embodiments of the present application are applied to the network architecture shown in FIG. 1 , the first terminal device described below may be the terminal device 2 (ie, the remote terminal device) in the network architecture shown in FIG. 1 , and the following The second terminal device described in the text may be the terminal device 1 (ie, the relay terminal device) in the network architecture shown in FIG. 1 , and the first core network device described below may be the network architecture shown in FIG. 1 . The core network device in , the second core network device described below may also be the core network device in the network architecture shown in FIG. 1 . It can be seen that in this scenario, the first core network device and the second core network device are the same core network device.

Alternatively, if the embodiment of the present application is applied to the network architecture shown in FIG. 4 , the first terminal device described below may be the terminal device 2 (ie, the remote terminal device) in the network architecture shown in FIG. 4 . , the second terminal device described below may be the terminal device 1 (ie, the relay terminal device) in the network architecture shown in FIG. 4 , and the first core network device described below may be the one shown in FIG. 4 The core network device 1 in the network architecture and the second core network device described below may also be the core network device 2 in the network architecture shown in FIG. 4 . It can be seen that in this scenario, the first core network device and the second core network device are different core network devices.

S501. The second terminal device sends the first identifier to the first terminal device, and correspondingly, the first terminal device receives the first identifier from the second terminal device.

The second terminal device acts as a relay terminal device. If the relay terminal device needs to save energy, the technical solutions provided in the embodiments of the present application can be implemented. By updating the identifier of the first terminal device, the first terminal device and the second terminal device can be made The paging occasions of the two terminals are aligned as far as possible, thereby reducing the power consumption of the second terminal device. Alternatively, the second terminal device may also determine whether to execute the technical solutions provided by the embodiments of the present application according to the number of remote terminal devices served by the second terminal device. For example, if the number of remote terminal devices served by the second terminal device is small, even if the PO of these remote terminal devices is different from the PO of the second terminal device, the second terminal device will wake up additionally in the PO of each remote terminal device. To monitor paging for the corresponding remote terminal equipment, the required power consumption may not be very large, then the second terminal equipment can determine that it is not necessary to align the paging timings of the first terminal equipment and the second terminal equipment, then It is not necessary to implement the technical solutions provided in the embodiments of the present application; and if the number of remote terminal devices served by the second terminal device is large, then, if the PO of these remote terminal devices is different from the PO of the second terminal device, or Among these remote terminal devices, the POs of multiple remote terminal devices are different from those of the second terminal device, and the second terminal device additionally wakes up at the POs of these remote terminal devices to monitor paging for the corresponding remote terminal devices , the required power consumption will be relatively large, and the second terminal device can determine that it is necessary to align the paging timings of the first terminal device and the second terminal device as much as possible, and then the technical solutions provided by the embodiments of the present application can be implemented. .

Likewise, when the first terminal device receives the first identifier, it can also decide whether to change the PO of the first terminal device. Regarding the decision-making manner of the first terminal device, this embodiment of the present application does not limit it.

For example, the second terminal device may send a third message to the first terminal device through the PC5 interface, and the third message may include the first identifier. The third message is, for example, a PC5-RRC message or a PC5-signaling (S) message or the like. The first identifier is an identifier of the second terminal device, and the first identifier can be used to determine the PO of the second terminal device. For example, the first identifier may be the 5G-S-TMSI of the second terminal device; alternatively, the first identifier may be the UE_ID of the second terminal device, or the first identifier may also be referred to as the first value, regardless of the first identifier Whether it is the UE_ID of the second terminal device or the first value, both means that the first identification is of the second terminal device (5G-S-TMSI mod 1024); or, the first identification can also be other identification, as long as the PO of the second terminal device can be determined according to the first identification.

For a terminal device, if it needs to monitor paging at a certain PO, the terminal device will wake up at the PO and monitor the paging. However, the terminal device may not enter the sleep state immediately after the PO ends. For example, the terminal device can perform other operations after waking up, such as measuring reference signals, etc. It will continue to work for a period of time and then go to sleep. For example, the duration of a PO may be 1 second, and the terminal device may wake up for 20 seconds and then go to sleep. Then for the second terminal device, if the PO of the first terminal device and the PO of the second terminal device are the same, the second terminal device can monitor the paging of the first terminal device in the PO of the second terminal device, if the first terminal device The PO of a terminal device is different from the PO of the second terminal device, but if the PO of the first terminal device is within the time when the second terminal device wakes up, the second terminal device can also monitor the paging for the first terminal device, And it will not bring extra power consumption caused by dedicated wake up.

The second terminal device knows the time when the second terminal device wakes up. Therefore, as an optional implementation manner, the second terminal device may determine a range, for example, called the first range, and the first range is, for example, the first range. A value range of the identifier of the terminal device (here, the identifier to be allocated by the first core network device), if the identifier of the first terminal device belongs to the first range, then the paging determined according to the identifier of the first terminal device The timing will be within the time when the second terminal device wakes up, for example, the first identifier may belong to the first scope; or, the first scope is, for example, the PO determined according to the first identifier and the identifier of the first terminal device (here refers to , the range to which the time domain distance between POs determined by the ID to be allocated by the first core network device) belongs, if the time domain distance of the two POs belongs to this range, then the PO of the first terminal device will also be located in the second The time that the end device wakes up. In other words, if the first range is the value range of the identity of the first terminal device, and the identity of the first terminal device belongs to the first range, then the PO determined according to the first identity and the PO determined according to the identity of the first terminal device The PO may be the same, or, the time domain distance between the PO determined according to the first identifier and the PO determined according to the first terminal device identifier may be smaller than the first threshold; or, if the first range is determined according to the first identifier The range to which the time domain distance between the PO and the PO determined according to the identification of the first terminal device belongs, and the time domain distance between the PO determined according to the first identification and the PO determined according to the identification of the first terminal device belongs to this range , then, the PO determined according to the first identification and the PO determined according to the identification of the first terminal device may be the same, or the time domain distance between the PO determined according to the first identification and the PO determined according to the identification of the first terminal device can be smaller than the first threshold. It can be understood that as long as the time domain distance between the two POs is less than the first threshold, or the two POs are the same, the PO of the first terminal device will be within the time when the second terminal device wakes up. Wherein, if the time domain distance between the PO determined according to the first identification and the PO determined according to the first terminal device identification is smaller than the first threshold, then within a DRX cycle in which both POs appear, the two POs may Partially overlapping in time domain, or possibly non-overlapping in time domain.

In addition, the identifier of the first terminal device belongs to the first range, and the identifier here refers to, for example, the UE_ID of the first terminal device. Or to be more precise, the UE_ID corresponding to the identifier of the first terminal device should belong to the first range. For example, if the identifier of the first terminal device is 5G-S-TMSI, it should be such that the value of (5G-S-TMSI mod1024) of the first terminal device belongs to the first range.

For example, if the first range is the value range of the identifier of the first terminal device, and the first identifier is, for example, the UE_ID of the second terminal device, for example, the first identifier is 758, then the second terminal device can wake up according to the second terminal device time to determine the first range, for example, the first range is [648,798]. In a word, the second terminal device needs to satisfy the first range. As long as the identifier of the first terminal device belongs to the first range, the PO determined according to the identifier of the first terminal device can be within the time when the second terminal device wakes up. As described here, the first range is a value range of the identifier of the first terminal device, where the identifier of the first terminal device may refer to the UE_ID of the first terminal device.

For example, if the first range is the range to which the time domain distance between the PO determined according to the first identification and the PO determined according to the identification of the first terminal device belongs, then the first range information may include two values, which are two values. The time domain range constituted by each value is the first range. For example, if the first range information includes two values of 0 and 10, the first range is [0, 10], and the unit is, for example, milliseconds. Or, if the first range is the range to which the time domain distance between the PO determined according to the first identification and the PO determined according to the identification of the first terminal device belongs, then the first range information may also include only one value, according to This value can also determine a range, which is the first range. For example, if the value included in the first range information is 10, then the first range may be [0, 10], and the unit is, for example, milliseconds. Wherein, if the PO of the first terminal device and the PO of the second terminal device are different, the PO of the first terminal device may be located before the PO of the second terminal device in the time domain, or may also be located in the PO of the second terminal device After that, as long as the temporal distance between the two POs is within the first range.

For example, the second terminal device may send the first range information to the first terminal device, and the first range information may indicate the first range. For example, the second terminal device may also include the first range information in the third message and send it to the first terminal device together.

In addition, as an optional implementation manner, the second terminal device may also send the first cycle to the first terminal device, and the first terminal device receives the first cycle from the second terminal device, and the first cycle is the second terminal device. The DRX cycle (which may be the DRX cycle of the second device in an idle state or an inactive state), that is, the second terminal device may inform the first terminal device of the DRX cycle of the second terminal device. For example, the second terminal device may also include the first period in the third message and send it to the first terminal device together.

S502. The first terminal device sends a second message to the second terminal device, and correspondingly, the second terminal device receives the second message from the first terminal device. The second message includes the second period.

If the first terminal device receives the first cycle, the first terminal device may determine the magnitude relationship between the second cycle and the first cycle, where the second cycle is the DRX cycle of the first terminal device. If the second period is greater than or equal to the first period, then the second terminal equipment does not need to know the DRX period of the first terminal equipment. paging, so S502 may not need to be performed in this case; or, if the second cycle is smaller than the first cycle, that is, the DRX cycle of the remote terminal device is smaller than the DRX cycle of the relay terminal device, S502 may be performed. Therefore, S502 is an optional step, which is represented by a dotted line in FIG. 5 .

Because, when the second period is less than the first period, if the second terminal device does not know the DRX period of the first terminal equipment, but monitors the paging for the first terminal equipment according to the first period, it may miss some paging. For example, the first period is 1.28 seconds, the second period is 640 milliseconds, and the core network device pages the first terminal device at an interval of 640 milliseconds. If the second terminal device listens every 1.28 seconds, it may miss Paging of the first terminal device. Therefore, if the second period is smaller than the first period, the first terminal device can send a second message to the second terminal device, and notify the second terminal device of the DRX period of the first terminal device through the second message, so as to reduce the second The probability that a terminal device misses a page of the first terminal device.

As an optional implementation manner, the second message may further include first indication information. For example, the first indication information occupies one or more bits (bits), and the first indication information may indicate (or suggest) that the DRX cycle The length is modified to the length of the second period. For example, the first indication information occupies 1 bit, if the value of this bit is "0", it indicates that the length of the DRX cycle does not need to be modified; if the value of this bit is "1", it indicates that it is recommended to modify the length of the DRX cycle. For another example, if the second message does not include the first indication information, it indicates that the length of the DRX cycle does not need to be modified; if the second message includes the first indication information, it indicates that it is recommended to modify the length of the DRX cycle. That is, if the second cycle is smaller than the first cycle, the first terminal device may instruct the second terminal device to modify the DRX cycle of the second terminal device so that the length of the modified DRX cycle of the second terminal device is the same as the length of the second cycle Similarly, in this way, the second terminal device will monitor the paging for the first terminal device according to the second cycle, which reduces the probability of missing the paging of the first terminal device.

Alternatively, the second message may not include the first indication information, and the second cycle included in the second message may implicitly indicate (or suggest) modify the length of the DRX cycle to the length of the second cycle. In this way, no additional indication information is needed, which helps to save signaling overhead.

Alternatively, the second message may also not instruct to modify the DRX cycle, that is, the second message only sends the second cycle to the second terminal device without instructing the second terminal device to modify the DRX cycle.

S503. The second terminal device negotiates the DRX cycle of the second terminal device with the second core network device. In FIG. 5 , it is taken as an example that the first core network device and the second core network device are the same core network device, that is, the core network device in FIG. 5 .

If the second message indicates to modify the length of the DRX cycle, S503 may be executed; or, if the second message does not indicate to modify the length of the DRX cycle, then S503 may be executed, or S503 may not be executed, in this case whether to execute S503, which may depend on the implementation of the second terminal device. It can be seen that S503 is an optional step, which is represented by a dotted line in FIG. 5 .

For example, when negotiating with the second core network device, the second terminal device may send a second cause value to the second core network device, and the second cause value may indicate that the second terminal device is a relay terminal device, or in other words, indicate the second cause value The second terminal device provides a relay service for the first terminal device, so the DRX cycle of the second terminal device needs to be adjusted to be consistent with the DRX cycle of the first terminal device.

For example, the second terminal device may send a first negotiation message to the second core network device, and the second core network device receives the first negotiation message from the second terminal device, where the first negotiation message is, for example, an initial registration message or a mobile registration message, etc. . The first negotiation message may include the DRX parameter requested by the second terminal device or the requested extended idle state DRX parameter, and the like. The second core network device sends a second negotiation message to the second terminal device, and the second terminal device receives the second negotiation message from the second core network device, where the second negotiation message is, for example, a registration complete message or other messages. In the second negotiation message, the negotiated DRX parameters or the negotiated extended idle state DRX parameters may be included to indicate DRX related parameters. At this point, the negotiation can be completed, or the second terminal device can further send a message to the second core network device to continue the negotiation, and so on until the negotiation is completed.

Through negotiation with the second core network device, the second terminal device can make the length of the DRX cycle of the second terminal device determined through negotiation to be the same as the length of the second cycle. For example, the DRX cycle of the second terminal device determined through negotiation is referred to as the third cycle, and the length of the third cycle and the length of the second cycle may be the same. If the PO of the first terminal device and the PO of the second terminal device are different, but the time domain distance between the two POs is less than the first threshold, the second terminal device does not need to enter the page after monitoring the paging of one of the terminal devices. In the dormant state, it will enter the dormant state after the paging monitoring of the other terminal equipment is completed. Since the paging timings of the two terminal equipments are relatively close in the time domain, the waiting time of the second terminal equipment brings about The power consumption may be smaller than the power consumption caused by waking up after the second terminal device sleeps. Alternatively, if the PO of the first terminal device and the PO of the second terminal device are also the same, then the PO of the first terminal device and the PO of the second terminal device can be completely overlapped, and the second terminal device only needs to When the PO of the device wakes up to monitor, it can monitor the paging of the second terminal device and the paging of the first terminal device. For example, referring to FIG. 6 , it is a schematic diagram showing that the PO of the first terminal device and the PO of the second terminal device completely overlap (or are completely aligned, or are the same). T in FIG. 6 represents the DRX cycle (eg, the second cycle) of the first terminal device. The length of the DRX cycle of the first terminal device is the same as the length of the DRX cycle (eg, the third cycle) of the second terminal device. Therefore, the first The PO of the terminal device and the PO of the second terminal device completely overlap, so the rectangular box in FIG. 6 represents both the PO of the first terminal device and the PO of the second terminal device.

If the second terminal device receives the second message, it indicates that the second cycle is smaller than the first cycle, but the second terminal device may not negotiate with the second core network device to re-determine the DRX cycle of the second terminal device, that is, the second The DRX cycle of the terminal device is still the first cycle. In this case, the second terminal device not only monitors the paging of the second terminal device according to the first cycle, but also monitors the paging of the first terminal device according to the second cycle. In this case, for a DRX cycle in which both the PO of the first terminal device and the PO of the second terminal device appear, the PO of the second terminal device and the PO of the first terminal device (meaning, according to the following will be The PO determined by the introduced second identifier can be aligned (that is, the PO of the second terminal device is the same as the PO of the first terminal device), then in this DRX cycle, the second terminal device only needs to It is enough to wake up and monitor at the PO of the device, and there is no need to wake up in an additional PO. It can be seen that even if the second terminal device does not modify the DRX cycle of the second terminal device, the power consumption of the second terminal device due to monitoring paging can be reduced.

Or, but for a DRX cycle in which both the PO of the first terminal device and the PO of the second terminal device appear, if the PO of the second terminal device and the PO of the first terminal device (meaning, according to the following will be introduced) The PO) determined by the second identifier may also be different, but the time domain distance of the two POs is less than the first threshold, then the second terminal device does not need to enter the dormant state after monitoring the paging of one of the terminal devices, but It is to wait for the paging monitoring of the other terminal device to complete before entering the sleep state. Since the paging timings of the two terminal devices are relatively close in the time domain, the power consumption caused by the waiting of the second terminal device can be reduced. It is less than the power consumption caused by waking up after the second terminal device sleeps. It can be seen that even if the second terminal device does not modify the DRX cycle of the second terminal device, the power consumption of the second terminal device due to monitoring paging can be reduced. For example, reference may be made to FIG. 7 , which is a schematic diagram showing that the PO of the first terminal device and the PO of the second terminal device do not completely overlap (or in other words, the time domain distance is smaller than the first threshold). T1 in FIG. 7 represents the first cycle, and T2 represents the second cycle. The length of the second period is less than the length of the second period, then in a DRX period in which both the PO of the first terminal device and the PO of the second terminal device appear, the PO of the first terminal device and the PO of the second terminal device may be partially It may overlap or not. FIG. 7 takes the PO of the first terminal device and the PO of the second terminal device as an example that do not overlap. In FIG. 7 , the blank rectangular box represents the PO of the first terminal device, and the oblique-lined rectangular box represents the PO of the second terminal device.

In addition, reference may be made to FIG. 8 , which is a schematic diagram showing that the PO of the first terminal device and the PO of the second terminal device are different. As shown in FIG. 8 , the PO of the first terminal device and the PO of the second terminal device are completely different, that is, , the PO of the first terminal device and the PO of the second terminal device are different, and the time domain distance between the PO of the first terminal device and the PO of the second terminal device is also greater than or equal to the first threshold. T1 in FIG. 8 represents the DRX cycle of the first terminal device, and T2 represents the DRX cycle of the second terminal device. For example, the length of the DRX cycle of the first terminal device is smaller than the length of the DRX cycle of the second terminal device. In FIG. 8 , the blank rectangular box represents the PO of the first terminal device, and the oblique-lined rectangular box represents the PO of the second terminal device. It can be seen that in a DRX cycle in which both POs appear, the time-domain distance between the two POs is relatively far. After the execution is completed, another PO may not be started yet, so the second terminal device needs to go to sleep, and wake up again to monitor paging when another PO starts. Obviously, compared with the scenario shown in FIG. 6 or the scenario shown in FIG. 7 , the scenario shown in FIG. 8 consumes more power for the second terminal device. It can be known from these several drawings that by adopting the method provided by the embodiments of the present application, the purpose of energy saving for the second terminal device can be achieved.

S504. The first terminal device sends the first message to the first core network device, and correspondingly, the first core network device receives the first message from the first terminal device. Such as non-access stratum (non-access stratum, NAS) message. For example, the first message may reuse an existing message, for example, the first message may be a registration request (registeration request) message, or may be other NAS messages, such as other NAS messages in the registration process, or may be Other NAS messages after registration is complete. Alternatively, the first message may also be a newly added message in this embodiment of the present application, which is dedicated to sending the identifier of the terminal device.

The first message may include a first identification, and the first message is used to request to update the identification of the first terminal device according to the first identification. The first message may include second indication information, and the second indication information may be used to request to update the identity of the first terminal device according to the first identity, for example, the second indication information may occupy one or more bits. Alternatively, the first message may not include the second indication information, and the first identifier may implicitly indicate to update the identifier of the first terminal device according to the first identifier. Optionally, the first message may further include a first cause value, and the first cause value may indicate that the first terminal device is a remote terminal device, or in other words, instruct the second terminal device to provide relay services for the first terminal device, so The first terminal device needs to set the identity of the first terminal device according to the identity of the second terminal device (ie, the first identity).

As an optional implementation manner, the first message may further include first range information. The first range information may be sent by the second terminal device to the first terminal device, and the first terminal device may add the first range information to the first message and forward it to the first core network device. Alternatively, the first terminal device may also process the first range information from the second terminal device before sending it to the first core network device. For example, the first range indicated by the first range information sent by the second terminal device to the first terminal device is the range to which the identifier of the first terminal device belongs, and then the first terminal device may determine the determination based on the first identifier according to the first range The range to which the time domain distance between the PO and the PO determined according to the identity of the first terminal device belongs, so that the first range indicated by the first range information sent by the first terminal device to the first core network device may be based on the first range. Identify the range to which the time domain distance between the determined PO and the PO determined according to the identity of the first terminal device belongs. That is, the first range information sent by the second terminal device to the first terminal device and the first range information sent by the first terminal device to the first core network device may be the same type of information, for example, the indicated first range is both The range to which the identifier of the first terminal device belongs, or different information, for example, the first range indicated by the first range information sent by the second terminal device to the first terminal device is the range to which the identifier of the first terminal device belongs, The first range indicated by the first range information sent by the first terminal device to the first core network device is the range to which the time domain distance between the PO determined according to the first identification and the PO determined according to the identification of the first terminal device belongs to .

S505: The first core network device allocates a new identity to the first terminal device according to the first identity, for example, the allocated new identity is called a second identity.

If the first message does not include the first range information, the UE_ID corresponding to the second identifier allocated by the first core network device may be the same as the UE_ID corresponding to the second identifier. The UE_ID corresponding to the second identification can be the same as the UE_ID corresponding to the second identification, so that the PO determined according to the first identification and the PO determined according to the second identification can be the same. For example, the second identifier may be the 5G-globally unique temporary UE identity (globally unique temporary UE identity, GUTI) of the first terminal device, or the 5G-S-TMSI of the first terminal device, or may also be the first terminal device other identifiers. The first identifier is, for example, the UE_ID of the second terminal device, or the 5G-S-TMSI of the second terminal device, or the like. However, no matter what type of identification the second identification is, the UE_ID corresponding to the second identification is the same as the UE_ID corresponding to the first identification. For example, if the first identifier is the UE_ID of the second terminal device, and the second identifier is the 5G-S-TMSI of the first terminal device, the UE_ID corresponding to the second identifier is the UE_ID of the first terminal device (5G-S-TMSI mod 1024) , so that the value is the same as the first identifier; for another example, if the first identifier is the 5G-S-TMSI of the second terminal device, and the second identifier is the 5G-GUTI of the first terminal device, then the corresponding UE_ID is the lower 10 bits of the 5G-GUTI of the first terminal device, so that the value is the same as (5G-S-TMSI mod 1024) of the second terminal device.

Alternatively, if the first message includes the first range information, the first core network device may allocate a new identity to the first terminal device according to the first range information and the first identity. The UE_ID corresponding to the second identifier allocated by the first core network device may be the same as or different from the UE_ID corresponding to the second identifier. In short, it needs to be satisfied that the UE_ID corresponding to the second identifier belongs to the first range, or it is satisfied that according to the second identifier The time domain distance between the PO determined by the corresponding UE_ID and the PO determined by the UE_ID corresponding to the second identifier belongs to the first range. For example, the first range indicated by the first range information is the range to which the identifier of the first terminal device belongs. For example, the first range is [648,798], then the first core network device can select a value from the first range and assign it to If the first terminal device, for example, the first core network device allocates the second identifier to the first terminal device, the value is the value of the UE_ID corresponding to the second identifier. For another example, the first range indicated by the first range information is the range to which the time domain distance between the PO determined according to the first identification and the PO determined according to the identification of the first terminal device belongs, then the first core network device can Select a value within the first range, and according to the value and the first identification, an identification can be determined, such as the second identification, then, the PO determined according to the first identification and the PO determined according to the identification of the first terminal device The time domain distance between is the value, and the value belongs to the first range.

The first core network device allocates a new identity to the first terminal device according to the first identity, so that the PO determined according to the first identity is the same as the PO determined according to the second identity, or the PO determined according to the first identity is the same as the PO determined according to the second identity. The time domain distance between the POs determined according to the second identifier is smaller than the first threshold. In any case, according to the above analysis, the power consumption of the second terminal device due to monitoring paging can be reduced.

S506: The first core network device sends the second identifier to the first terminal device, and the first terminal device receives the second identifier from the first core network device.

After allocating the second identification to the first terminal device, the first core network device may send the second identification to the first terminal device, so that the first terminal device may learn the new identification of the first terminal device. For example, the first core network device may include the second identifier in a fourth message and send it to the first terminal device, and the fourth message may reuse existing messages, such as a registration complete message, or a configuration An update command message (configuration update command message), or the fourth message may also be a newly added message in the embodiment of the present application, which is dedicated to sending an identifier to the terminal device.

S507: The first terminal device sends the second identifier to the second terminal device, and the second terminal device receives the second identifier from the first terminal device.

Alternatively, the first terminal device may also not send the second identification to the second terminal device, that is, S507 is not performed. Because the second terminal device executes S501, it indicates that the second terminal device has started the process of aligning the PO of the first terminal device and the PO of the second terminal device. Then, even if the second terminal device does not know the second identifier, the second terminal device will monitor the paging for the first terminal device according to the second cycle, that is, the second terminal device will, according to the second cycle, monitor each DRX in the Wake up within the periodic PO to monitor paging for the first terminal device. However, if the second terminal device does not know the second identifier, the second terminal device cannot determine whether the first terminal device is paged. In this case, if the second terminal device monitors the paging message according to the second cycle, The second terminal device will send the paging message to the first terminal device, and the first terminal device can determine by itself whether to be paged. This way can reduce the burden of the second terminal device, but the first terminal device may need to receive more paging messages. It can be seen that S507 is an optional step, which is represented by a dotted line in FIG. 5 .

In addition, the first terminal device may enter the RRC disconnected state. For example, the RRC disconnected state may be the RRC idle state, or may also be the RRC inactive state. For example, the first terminal device may enter the RRC disconnected state before executing S507 and after executing S506, or the first terminal device may also enter the RRC disconnected state after executing S507. The first terminal device enters the RRC disconnected state in a manner that the first terminal device sends a request message to the access network device, and the access network device receives the request message from the first terminal device, and the request message can be used to request to enter the RRC disconnected state. connected state. After that, the access network device sends a confirmation message to the first terminal device, where the confirmation message is used to instruct the first terminal device to enter the RRC disconnected state, and the first terminal device enters the RRC disconnected state.

S508, the second terminal device enters the RRC disconnected state. For example, the RRC disconnected state may be the RRC idle state, or may also be the RRC inactive state.

S509: The core network device pages the first terminal device according to the second cycle, and the second terminal device monitors the paging from the core network device according to the second cycle.

The second terminal device knows the second identifier, and therefore can determine the PO of the first terminal device according to the second identifier, so that the second terminal device monitors the paging for the first terminal device at the PO of the first terminal device. Or, if the first terminal device does not send the second identification to the second terminal device, the second terminal device can monitor the paging for the first terminal device at the PO of the second terminal device, or the second terminal device can monitor the page on the second terminal device. The PO of the terminal device can monitor paging for the first terminal device during the wake-up time of the PO of the terminal device. Because the PO of the first terminal device and the PO of the second terminal device are the same, or the time domain distance is less than the first threshold, the second terminal device can still monitor the paging of the first terminal device.

S510. The second terminal device sends the paging message to the first terminal device, and the first terminal device receives the paging message from the second terminal device.

Among them, S509 and S510 are optional steps, which are represented by dotted lines in FIG. 5 .

If the first terminal device sends the second identifier to the second terminal device, when monitoring the paging for the first terminal device, the second terminal device can determine whether the paging message includes the Second identification, if the second identification is included, it indicates that the first terminal device is paged, and the second terminal device sends the paging message to the first terminal device, and if the paging message does not include the second identification, it indicates that the first terminal device is paged. If a terminal device is not paged, the second terminal device may not need to send the paging message to the first terminal device, for example, the second terminal device may discard the paging message. In this way, information interaction between the second terminal device and the first terminal device can be reduced, transmission overhead can be saved, redundant information received by the first terminal device can also be reduced, and the validity of the information received by the first terminal device can be improved. .

Alternatively, if the first terminal device does not send the second identifier to the second terminal device, the second terminal device will also monitor paging for the first terminal device according to the second cycle. However, because the second terminal device does not know the second identifier, the second terminal device cannot determine whether the first terminal device is paged. In this case, if the second terminal device monitors the paging message according to the second cycle, the second terminal device will send the paging message to the first terminal device, and the first terminal device will determine whether to be paged by itself. . This way can reduce the burden of the second terminal device, but the first terminal device may need to receive more paging messages.

Of course, the core network device may also page the second terminal device according to the first cycle (or, the third cycle), and the second terminal device may also monitor the paging from the core network device according to the first cycle (or, the third cycle). , without further elaboration.

In this embodiment of the present application, the first terminal device may request to update the identity of the first terminal device, so that the PO of the first terminal device is aligned with the PO of the second terminal device as much as possible, so that the second terminal device will not monitor the first terminal device because of monitoring the first terminal device. The device wakes up at an extra time after paging, saving the power consumption of the second terminal device.

In the embodiment shown in FIG. 5 , the remote terminal device (for example, the first terminal device) requests to update the identifier of the second terminal device, so that the PO of the first terminal device is aligned with the PO of the second terminal device as much as possible . Alternatively, there may also be another way, that is, the relay terminal device (for example, the second terminal device) can also request to update the identifier of the relay terminal device, so that the PO of the first terminal device can be connected to the second terminal device. The PO is as aligned as possible. In view of this, the embodiment of the present application provides a second communication method, in which the second terminal device may request to update the identity of the second terminal device. Please refer to FIG. 9 , which is a flowchart of the method. For example, if the second terminal device only provides a relay service for one terminal device (for example, the first terminal device), the method provided by the embodiment shown in FIG. 5 may be used, or the embodiment shown in FIG. 9 may be used to provide the relay service. or, if the second terminal device provides relay services for multiple terminal devices, then, if the method provided by the embodiment shown in FIG. 9 is adopted, the second terminal device can only align the PO with one of the terminal devices as much as possible. , but for other terminal devices, the second terminal device still needs to wake up in an extra time to monitor paging. Therefore, if this is the case, the method provided by the embodiment shown in FIG. 5 is preferably used.

In the following introduction process, it is taken as an example that the second communication method is applied to the network architecture shown in FIG. 1 or FIG. 4 .

S901. The first terminal device sends the first identifier to the second terminal device, and the second terminal device receives the first identifier from the first terminal device. In this embodiment of the present application, the first identifier is an identifier of the first terminal device.

The second terminal device acts as a relay terminal device. If the relay terminal device needs to save energy, the technical solutions provided in the embodiments of the present application can be implemented. By updating the identifier of the second terminal device, the first terminal device and the second terminal device can be The paging occasions of the two terminals are aligned as far as possible, thereby reducing the power consumption of the second terminal device. Alternatively, the second terminal device may also determine whether to execute the technical solutions provided by the embodiments of the present application according to the number of remote terminal devices served by the second terminal device. For example, if there is only one remote terminal device (for example, the first terminal device) served by the second terminal device, even if the PO of the remote terminal device is different from the PO of the second terminal device, the second terminal device is in the remote terminal device. The PO additionally wakes up to monitor paging for the remote terminal device, and the required power consumption may not be very large, so the second terminal device can determine that it is not necessary to make the paging timing of the first terminal device and the second terminal device. Alignment, then it is not necessary to implement the technical solutions provided by the embodiments of the present application; or, even if there is only one remote terminal device (for example, the first terminal device) served by the second terminal device, the second terminal device needs to save power consumption. The technical solutions provided in the embodiments of the present application may also be implemented.

For example, the first terminal device may send a second message to the second terminal device through the PC5 interface, and the second message may include the first identifier. The second message is, for example, a PC5-RRC message or a PC5-S message. The first identifier is an identifier of the first terminal device, and the first identifier can be used to determine the PO of the first terminal device. For example, the first identifier may be the 5G-S-TMSI of the first terminal device; or, the first identifier may be the UE_ID of the first terminal device, in this case, the first identifier may also be referred to as the first value, Regardless of whether the first identifier is the UE_ID of the first terminal device or the first value, it means that the first identifier is of the first terminal device (5G-S-TMSI mod 1024); or, the first identifier may also be the first identifier. Other identifiers of the terminal device only need to be able to determine the PO of the first terminal device according to the first identifier.

Optionally, the first terminal device may also send the first cycle to the second terminal device, and the second terminal device may receive the first cycle from the first terminal device. The first cycle is the DRX cycle of the first terminal device. Because the first cycle is the minimum value between the specific DRX cycle of the first terminal device and the default DRX cycle of system information broadcast, then if the first cycle is the specific DRX cycle of the first terminal device, the first cycle is possible is smaller than the DRX cycle of the second terminal device (the DRX cycle of the second terminal device may be the default DRX cycle of the system information broadcast), if this is the case, if the second terminal device does not know the DRX cycle of the first terminal device, Instead, the first terminal device monitors paging according to the DRX cycle of the second terminal device. If the length of the DRX cycle of the second terminal device is greater than the length of the first cycle, the second terminal device may miss some pages. So in this case, the first terminal device can send the first cycle to the second terminal device.

Or, if the first cycle is the default DRX cycle of the system information broadcast, then the DRX cycle of the second terminal device can only be greater than or equal to the DRX cycle of the first terminal device (if the DRX cycle of the second terminal device is also the default DRX cycle , the length of the DRX cycle of the second terminal device is equal to the length of the first cycle, or, if the DRX cycle of the second terminal device is the specific DRX cycle of the second terminal device, the length of the DRX cycle of the second terminal device is less than the length of the first cycle. length of one cycle). If this is the case, then the second terminal device does not need to know the DRX cycle of the first terminal device, and the second terminal device can monitor the paging of the first terminal device as long as it monitors the paging according to the DRX cycle of the second terminal device. call. Therefore, in this case, the first terminal device may also not send the first cycle to the second terminal device.

If the first terminal device is to send the first cycle to the second terminal device, the first terminal device may add the first cycle to the second message and send it to the second terminal device.

S902. The second terminal device sends the first message to the second core network device, and correspondingly, the second core network device receives the first message from the second terminal device. The first message is, for example, a NAS message. For example, the first message can reuse existing messages, for example, the first message can be a registration request, or it can be other NAS messages, such as other NAS messages during the registration process, or other NAS messages after the registration is completed. NAS messages. Alternatively, the first message may also be a newly added message in this embodiment of the present application, which is dedicated to sending the identifier of the terminal device.

The first message may include the first identification, and the first message may be used to request to update the identification of the second terminal device according to the first identification. The first message may include indication information, and the indication information may be used to request to update the identity of the second terminal device according to the first identity. For example, the indication information may occupy one or more bits. Alternatively, the first message may not include the indication information, and the first identifier may implicitly instruct to update the identifier of the second terminal device according to the first identifier. Optionally, the first message may further include a first cause value, and the first cause value may indicate that the second terminal device is a relay terminal device, or in other words, instruct the second terminal device to provide a relay service for the first terminal device, so The second terminal device needs to set the identity of the second terminal device according to the identity of the first terminal device (ie, the first identity).

As an optional implementation manner, the second terminal device may determine a range, for example, referred to as the first range, and the first range is, for example, the identifier of the second terminal device (here, the identifier to be allocated by the first core network device ) value range, if the identity of the second terminal equipment belongs to the first range, then the paging occasion determined according to the identity of the first terminal equipment will be within the time when the second terminal equipment wakes up, for example, the first identity can be belong to the first range; or, the first range is, for example, the time domain between the PO determined according to the first identification and the PO determined according to the identification of the second terminal device (here, the identification to be allocated by the first core network device) The range to which the distance belongs. If the time domain distance of the two POs belongs to this range, then the PO of the first terminal device will also be within the time when the second terminal device wakes up. In other words, if the first range is the value range of the identity of the second terminal device, and the identity of the second terminal device belongs to the first range, then the PO determined according to the first identity and the PO determined according to the identity of the second terminal device The PO may be the same, or, the time domain distance between the PO determined according to the first identifier and the PO determined according to the second terminal device identifier may be smaller than the first threshold; or, if the first range is determined according to the first identifier The range to which the time domain distance between the PO and the PO determined according to the identification of the second terminal device belongs, and the time domain distance between the PO determined according to the first identification and the PO determined according to the identification of the second terminal device belongs to this range , then, the PO determined according to the first identification and the PO determined according to the identification of the second terminal equipment may be the same, or the time domain distance between the PO determined according to the first identification and the PO determined according to the identification of the second terminal equipment can be smaller than the first threshold. It can be understood that as long as the time domain distance between the two POs is less than the first threshold, or the two POs are the same, the PO of the first terminal device will be within the time when the second terminal device wakes up. Wherein, if the time domain distance between the PO determined according to the first identification and the PO determined according to the second terminal device identification is less than the first threshold, then in a DRX cycle in which both POs appear, the two POs may Partially overlapping in time domain, or possibly non-overlapping in time domain.

For more introduction of the first range information or the first range, reference may be made to S501 in the embodiment shown in FIG. 5 .

For example, the second terminal device may send the first range information to the second core network device, and the first range information may indicate the first range. For example, the second terminal device may also include the first range information in the first message, and send it to the second core network device together.

S903, the second core network device allocates a new identity to the second terminal device according to the first identity, for example, the allocated new identity is called a second identity.

For more introduction about the allocation of the second identifier by the second core network device, reference may be made to S505 in the embodiment shown in FIG. 5 .

S904: The second core network device sends the second identifier to the second terminal device, and the second terminal device receives the second identifier from the second core network device.

For example, the second core network device may include the second identifier in a third message and send it to the first terminal device, and the third message may reuse existing messages, such as a registration complete message or a configuration update command message, Alternatively, the third message may also be a newly added message in this embodiment of the present application, and is dedicated to sending an identifier to the terminal device.

S905, the second terminal device enters an RRC disconnected state. For example, the RRC disconnected state may be the RRC idle state, or may also be the RRC inactive state.

In addition, before the second terminal device enters the RRC disconnected state, the first terminal device may first enter the RRC disconnected state. Exactly when the first terminal device enters the RRC disconnected state is not limited in this embodiment of the present application. For example, the first terminal device may enter the RRC disconnected state before executing S901, or the first terminal device may enter the RRC disconnected state after executing S901, and so on.

S906: The core network device pages the first terminal device according to the second cycle, and the second terminal device monitors the paging from the core network device according to the second cycle.

The second terminal device knows the first identifier, and the second terminal device can determine the PO of the first terminal device according to the first identifier, so that the second terminal device monitors the paging for the first terminal device at the PO of the first terminal device.

S907: The second terminal device sends the paging message to the first terminal device, and the first terminal device receives the paging message from the second terminal device.

Among them, S906 and S907 are optional steps, which are represented by dotted lines in FIG. 9 .

In this embodiment of the present application, the first terminal device sends the first identifier to the second terminal device. If the first identifier is the 5G-S-TMSI of the first terminal device, the second terminal device is the first terminal device. When monitoring paging, if a paging message is monitored, it can be determined whether the paging message includes the first identifier. If the first identifier is included, it indicates that the first terminal device is being paged, and the second terminal device will then paging the paging message. The message is sent to the first terminal device, and if the paging message does not include the first identifier, indicating that the first terminal device is not paged, the second terminal device may not need to send the paging message to the first terminal device, for example The second terminal device may discard the paging message. In this way, information interaction between the second terminal device and the first terminal device can be reduced, transmission overhead can be saved, redundant information received by the first terminal device can also be reduced, and the validity of the information received by the first terminal device can be improved. .

Or, if the first identifier is the UE_ID of the first terminal device, and the paging message may carry other identifiers of the first terminal device, such as the 5G-S-TMSI of the first terminal device, then the second terminal device cannot obtain the Other identifiers of the first terminal device. The second terminal device will still monitor the paging for the first terminal device according to the second cycle. However, because the second terminal device does not know the complete identification of the first terminal device, the second terminal device cannot determine whether the first terminal device is paged. In this case, if the second terminal device monitors the paging message according to the second cycle, the second terminal device will send the paging message to the first terminal device, and the first terminal device will determine whether to be paged by itself. . This way can reduce the burden of the second terminal device, but the first terminal device may need to receive more paging messages.

Of course, the core network device can also page the second terminal device according to the DRX cycle of the second terminal device, and the second terminal device can also monitor the paging from the core network device according to the DRX cycle of the second terminal device. .

In this embodiment of the present application, the second terminal device may request to update the identity of the second terminal device, so that the PO of the second terminal device is aligned with the PO of the first terminal device as much as possible, so that the second terminal device will not monitor the first terminal device because of monitoring the first terminal device. The device wakes up at an extra time after paging, saving the power consumption of the second terminal device.

The apparatus for implementing the above method in the embodiments of the present application will be described below with reference to the accompanying drawings. Therefore, the above content can be used in subsequent embodiments, and repeated content will not be repeated.

FIG. 10 is a schematic block diagram of a communication apparatus 1000 provided by an embodiment of the present application. Exemplarily, the communication apparatus 1000 is, for example, the first terminal device 1000 . Exemplarily, the first terminal device 1000 is, for example, the first terminal device described in the embodiment shown in FIG. 5 .

The first terminal device 1000 includes a sending module 1020 and a receiving module 1030 . Optionally, the first terminal device 1000 may further include a processing module 1010 . Exemplarily, the first terminal device 1000 may be a terminal device, or may be a chip applied in the terminal device or other combined devices, components, etc. having the functions of the above-mentioned first terminal device. When the first terminal device 1000 is a terminal device, the sending module 1020 may be a transmitter, the transmitter may include an antenna and a radio frequency circuit, etc., the receiving module 1030 may be a receiver, and the receiver may include an antenna and a radio frequency circuit, etc., wherein the transmission The transmitter and the receiver may be different modules, or the transmitter and the receiver may be provided in the same functional module, which may be referred to as a transceiver, and the processing module 1010 may be a processor (or a processing circuit), such as The baseband processor may include one or more central processing units (CPUs). When the first terminal device 1000 is a component having the functions of the above-mentioned first terminal device, the sending module 1020 may be a radio frequency unit, and the receiving module may also be a radio frequency unit, wherein the transmitter and the receiver may be different modules respectively, or, The transmitter and the receiver may be provided in the same functional module, the functional module may be a radio frequency unit, and the processing module 1010 may be a processor (or a processing circuit), such as a baseband processor. When the first terminal device 1000 is a chip system, the sending module 1020 may be an output interface of a chip (eg, a baseband chip), and the receiving module 1030 may be an input interface of the chip (or, if the input interface and the output interface may be the same interface, then It is considered that the sending module 1020 and the receiving module 1030 are the same functional module, that is, the input and output interface of the chip), and the processing module 1010 may be a processor (or a processing circuit) of the chip system, and the processor may include one or more central processing units . It should be understood that the processing module 1010 in this embodiment of the present application may be implemented by a processor or a processor-related circuit component (or a processing circuit), the receiving module 1030 may be implemented by a transceiver or a transceiver-related circuit component, and the sending module 1020 may be implemented by A transmitter or transmitter-related circuit component implementation.

For example, the processing module 1010 may be configured to perform all operations performed by the first terminal device in the embodiment shown in FIG. 5 except for the transceiving operation, for example, the operation of determining the magnitude relationship between the first cycle and the second cycle , and/or other processes for supporting the techniques described herein. The sending module 1020 may be configured to perform all sending operations performed by the first terminal device in the embodiment shown in FIG. 5, such as S502, S504 and S507, and/or other processes for supporting the techniques described herein. The receiving module 1030 may be configured to perform all receiving operations performed by the first terminal device in the embodiment shown in FIG. 5, such as S501, S506 and S510, and/or other processes for supporting the techniques described herein.

In addition, the sending module 1020 and the receiving module 1030 may be a functional module, the functional module can complete both the sending operation and the receiving operation, the functional module can be called a transceiver module, for example, the transceiver module can be used to perform the All sending operations and receiving operations performed by the first terminal device in the embodiment, for example, when performing a sending operation, the transceiver module can be considered to be a sending module, and when performing a receiving operation, it can be considered that the transceiver module is a receiving module; or , the sending module 1020 and the receiving module 1030 can also be two functional modules, the transceiver module can also be regarded as a general term for these two functional modules, the sending module 1020 is used to complete the sending operation, for example, the sending module 1020 can be used to perform the operation shown in FIG. 5 . All the sending operations performed by the first terminal device in the illustrated embodiment, the receiving module 1030 is used to complete the receiving operations, for example, the receiving module 1030 can be used to perform the first terminal device in the embodiment shown in FIG. 5 performed by the first terminal device. All receive operations.

The receiving module 1030 is configured to receive a first identifier from a second terminal device, where the first identifier is an identifier of the second terminal device, wherein the second terminal device provides the first terminal device 1000 with the middle Following service, the first identifier is used to determine the paging occasion of the second terminal device;

The sending module 1020 is configured to send a first message to the first core network device, where the first message includes the first identifier, and the first message is used to request to update the information of the first terminal device 1000 according to the first identifier. identifier, the first core network device serves the first terminal device 1000;

The receiving module 1030 is further configured to receive a second identifier from the first core network device, where the second identifier is the updated identifier of the first terminal device 1000, and the second identifier is used to determine the first terminal device 1000 paging timing.

As an optional implementation manner, the first message further includes first range information, where the first range information is used to indicate the first range, and the first range is a value of the identifier of the first terminal device 1000 range, or the range to which the time domain distance between the paging occasion determined according to the first identifier and the paging occasion determined according to the second identifier belongs.

As an optional implementation manner, the receiving module 1030 is further configured to receive the first range information from the second terminal device.

As an optional implementation manner, the paging occasion determined according to the first identification is the same as the paging occasion determined according to the second identification, or the paging occasion determined according to the first identification is the same as the paging occasion determined according to the second identification The time domain distance between the paging occasions determined by the second identifier is smaller than the first threshold.

As an optional implementation manner, the first message further includes a first cause value, where the first cause value is used to indicate that the first terminal device 1000 is a remote terminal device.

As an optional implementation,

The receiving module 1030 is further configured to receive a first cycle from the second terminal device, where the first cycle is the DRX cycle of the second terminal device;

The receiving module 1030 is further configured to send a second message to the second terminal device when the processing module 1010 determines that the length of the second period is less than the length of the first period, where the second message includes the second period , the second period is the DRX period of the first terminal device 1000 .

As an optional implementation manner, the second message is further used to instruct to modify the length of the DRX cycle to the length of the second cycle.

As an optional implementation manner, the second identifier is carried in the configuration update message, or carried in the registration complete message.

As an optional implementation manner, the sending module 1020 is further configured to send the second identifier to the second terminal device, where the second identifier is used for the second terminal device being the first terminal device 1000 Monitor paging.

As an optional implementation manner, the first identifier is a first value, and the first value is a value of (5G-S-TMSI mod 1024) of the second terminal device, where mod Represents a modulo operation.

As an optional implementation,

The sending module 1020 is further configured to send a request message to the access network device, where the request message is used to request to enter the RRC disconnected state;

The receiving module 1030 is further configured to receive a confirmation message from the access network device, where the confirmation message is used to instruct the first terminal device 1000 to enter the RRC disconnected state.

For other functions that can be implemented by the first terminal device 1000, reference may be made to the relevant introduction of the embodiment shown in FIG. 5, and details are not repeated here.

FIG. 11 is a schematic block diagram of a communication apparatus 1100 provided by an embodiment of the present application. Exemplarily, the communication apparatus 1100 is, for example, the second terminal device 1100 . Exemplarily, the second terminal device 1100 is, for example, the second terminal device described in the embodiment shown in FIG. 5 .

The second terminal device 1100 includes a sending module 1120 and a receiving module 1130 . Optionally, the second terminal device may further include a processing module 1110 . Exemplarily, the second terminal device 1100 may be a terminal device, or may be a chip applied in the terminal device or other combined devices, components, etc. having the functions of the above-mentioned second terminal device. When the second terminal device 1100 is a terminal device, the sending module 1120 may be a transmitter, the transmitter may include an antenna and a radio frequency circuit, etc., the receiving module 1130 may be a receiver, and the receiver may include an antenna and a radio frequency circuit, etc., wherein the transmission The transmitter and receiver may be separate modules, or the transmitter and receiver may be provided in the same functional module, which may be called a transceiver, and the processing module 1110 may be a processor (or a processing circuit), such as Baseband processor. The baseband processor may include one or more CPUs. When the second terminal device 1100 is a component having the above-mentioned functions of the second terminal device, the sending module 1120 may be a radio frequency unit, and the receiving module may also be a radio frequency unit, wherein the transmitter and the receiver may be different modules respectively, or, The transmitter and the receiver may be provided in the same functional module, which may be a radio frequency unit, and the processing module 1110 may be a processor (or a processing circuit), such as a baseband processor. When the second terminal device 1100 is a chip system, the sending module 1120 may be an output interface of a chip (eg, a baseband chip), and the receiving module 1130 may be an input interface of the chip (or, if the input interface and the output interface may be the same interface, then It is considered that the sending module 1120 and the receiving module 1130 are the same functional module, that is, the input and output interface of the chip), and the processing module 1110 may be a processor (or a processing circuit) of the chip system, and the processor may include one or more central processing units . It should be understood that the processing module 1110 in this embodiment of the present application may be implemented by a processor or a processor-related circuit component (or a processing circuit), the receiving module 1130 may be implemented by a transceiver or a transceiver-related circuit component, and the sending module 1120 may be implemented by A transmitter or transmitter-related circuit component implementation.

For example, the processing module 1110 may be configured to perform all operations performed by the second terminal device in the embodiment shown in FIG. 5 except for the transceiving operations, such as S503 and S508, and/or to support the techniques described herein other processes. The sending module 1120 may be configured to perform all sending operations performed by the second terminal device in the embodiment shown in FIG. 5, such as S501, S503, S508 and S510, and/or other processes for supporting the techniques described herein . The receiving module 1130 may be configured to perform all receiving operations performed by the second terminal device in the embodiment shown in FIG. 5, such as S502, S503, S507, S508, and S509, and/or for supporting the techniques described herein. other processes.

In addition, regarding the implementation of the sending module 1120 and the receiving module 1130, reference may be made to the introduction to the implementation of the sending module 1020 and the receiving module 1030.

The sending module 1120 is configured to send a first identifier to the first terminal device, where the first identifier is the identifier of the second terminal device 1100, wherein the second terminal device 1100 provides relay services for the first terminal device , the first identifier is used to determine the paging occasion of the second terminal device 1100;

A receiving module 1130, configured to receive a second identifier from the first terminal device, where the second identifier is the identifier of the first terminal device, and the second identifier is determined according to the first identifier, The second identifier is used to determine the paging occasion of the first terminal device.

As an optional implementation manner, the sending module 1120 is further configured to send first range information to the first terminal device, where the first range information is used to indicate a first range, and the first range is the The value range of the identity of the first terminal device, or the range to which the time domain distance between the paging occasion determined according to the first identity and the paging occasion determined according to the second identity belongs.

As an optional implementation,

a processing module 1110, configured to determine a paging occasion according to the second identifier;

The receiving module 1130 is further configured to monitor paging for the first terminal device according to the paging occasion.

As an optional implementation,

The sending module 1120 is further configured to send a first cycle to the first terminal device, where the first cycle is the cycle of the second terminal device 1100;

The receiving module 1130 is further configured to receive a second message from the first terminal device, where the second message includes a second cycle, the second cycle is the DRX cycle of the first terminal device, and the second cycle is less than the length of the first period.

As an optional implementation manner, the processing module 1110 is further configured to negotiate the DRX cycle of the second terminal device 1100 with the second core network device, wherein the length of the negotiated DRX cycle of the second terminal device 1100 is the same as the length of the negotiated DRX cycle of the second terminal device 1100. The length of the second period is the same, and the second core network device serves the second terminal device 1100 .

As an optional implementation manner, the first identifier is a first value, and the first value is a value of (5G-S-TMSI mod 1024) of the second terminal device 1100, where mod represents Modulo operation.

For other functions that can be implemented by the second terminal device 1100, reference may be made to the relevant introduction of the embodiment shown in FIG. 5, and details are not repeated.

FIG. 12 is a schematic block diagram of a communication apparatus 1200 according to an embodiment of the present application. Exemplarily, the communication apparatus 1200 is, for example, the second terminal device 1200 .

The second terminal device 1200 includes a sending module 1220 and a receiving module 1230 . Optionally, the second terminal device 1200 further includes a processing module 1210 . Exemplarily, the second terminal device 1200 may be a terminal device, or may be a chip applied in the terminal device or other combined devices, components, etc. having the functions of the above-mentioned second terminal device. When the second terminal device 1200 is a terminal device, the sending module 1220 may be a transmitter, the transmitter may include an antenna and a radio frequency circuit, etc., the receiving module 1230 may be a receiver, and the receiver may include an antenna and a radio frequency circuit, etc., wherein the transmission The transmitter and the receiver may be separate modules, or the transmitter and the receiver may be provided in the same functional module, which may be referred to as a transceiver, and the processing module 1210 may be a processor (or a processing circuit), such as Baseband processor. The baseband processor may include one or more CPUs. When the second terminal device 1200 is a component having the functions of the above-mentioned second terminal device, the sending module 1220 may be a radio frequency unit, and the receiving module may also be a radio frequency unit, wherein the transmitter and the receiver may be different modules respectively, or, The transmitter and the receiver may be provided in the same functional module, the functional module may be a radio frequency unit, and the processing module 1210 may be a processor (or a processing circuit), such as a baseband processor. When the second terminal device 1200 is a chip system, the sending module 1220 can be an output interface of a chip (eg, a baseband chip), and the receiving module 1230 can be an input interface of the chip (or, if the input interface and the output interface can be the same interface, then It is considered that the sending module 1220 and the receiving module 1230 are the same functional module, that is, the input and output interface of the chip), and the processing module 1210 may be a processor (or a processing circuit) of the chip system, and the processor may include one or more central processing units . It should be understood that the processing module 1210 in this embodiment of the present application may be implemented by a processor or a processor-related circuit component (or a processing circuit), the receiving module 1230 may be implemented by a transceiver or a transceiver-related circuit component, and the sending module 1220 may be implemented by A transmitter or transmitter-related circuit component implementation.

For example, the processing module 1210 may be configured to perform all operations except the transceiving operation performed by the second terminal device in the embodiment shown in FIG. 9, such as S905, and/or other operations used to support the techniques described herein process. The sending module 1220 may be configured to perform all sending operations performed by the second terminal device in the embodiment shown in FIG. 9, such as S902, S905 and S907, and/or other processes for supporting the techniques described herein. The receiving module 1230 can be used to perform all receiving operations performed by the second terminal device in the embodiment shown in FIG. 9, such as S502, S503, S507, S901, S904, S905 and S906, and/or to support the Other procedures of the described techniques.

In addition, regarding the implementation of the sending module 1220 and the receiving module 1230, reference may be made to the introduction to the implementation of the sending module 1020 and the receiving module 1030.

The receiving module 1230 is configured to receive a first identifier from a first terminal device, where the first identifier is an identifier of the first terminal device, and the first identifier is used to determine the location of the first terminal device. call time;

The sending module 1220 is configured to send a first message to the second core network device, where the first message includes the first identifier, and the first message is used to request to update the information of the second terminal device 1200 according to the first identifier. identifier, the second core network device serves the second terminal device 1200;

The receiving module 1230 is further configured to receive a second identifier from the second core network device, where the second identifier is the updated identifier of the second terminal device 1200, and the second identifier is used to determine the second terminal device 1200 paging timing.

As an optional implementation manner, the first message further includes first range information, where the first range information is used to indicate the first range, and the first range is the value range of the second terminal device 1200, Or it is the range to which the time domain distance between the paging occasion determined according to the first identifier and the paging occasion determined according to the second identifier belongs.

As an optional implementation manner, the first message further includes a first cause value, where the first cause value is used to indicate that the second terminal device is a relay terminal device.

As an optional implementation manner, the first identifier is a first value, and the first value is a value of (5G-S-TMSI mod 1024) of the first terminal device, where mod Represents a modulo operation.

As an optional implementation,

a processing module 1210, configured to determine a paging occasion according to the first identifier;

The receiving module 1230 is further configured to monitor paging for the first terminal device according to the paging occasion.

For other functions that can be implemented by the second terminal device 1200, reference may be made to the relevant introduction of the embodiment shown in FIG. 9, and details are not repeated here.

An embodiment of the present application further provides a communication apparatus, where the communication apparatus may be a terminal device or a circuit. The communication apparatus may be configured to perform the actions performed by the terminal device (for example, the first device may be the terminal device) in the above method embodiments.

When the communication device is a terminal device, FIG. 13 shows a schematic structural diagram of a simplified terminal device. For the convenience of understanding and illustration, in FIG. 13 , the terminal device takes a mobile phone as an example. As shown in FIG. 13 , the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used to process communication protocols and communication data, control terminal equipment, execute software programs, and process data of software programs. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 13 . In an actual end device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device or the like. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.

In the embodiments of the present application, the antenna and the radio frequency circuit with the transceiver function may be regarded as the transceiver unit of the terminal device (the transceiver unit may be a functional unit, and the function unit can realize the sending function and the receiving function; alternatively, the transceiver unit may also be It includes two functional units, namely a receiving unit capable of realizing a receiving function and a transmitting unit capable of realizing a transmitting function), and a processor with a processing function is regarded as a processing unit of the terminal device. As shown in FIG. 13 , the terminal device includes a transceiver unit 1310 and a processing unit 1320 . The transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and the like. The processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, and the like. Optionally, the device for implementing the receiving function in the transceiver unit 1310 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 1310 may be regarded as a transmitting unit, that is, the transceiver unit 1310 includes a receiving unit and a transmitting unit. The transceiver unit may also sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit. The receiving unit may also sometimes be referred to as a receiver, receiver, or receiving circuit, or the like. The transmitting unit may also sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.

It should be understood that the transceiver unit 1310 can be configured to perform the sending operation and the receiving operation on the side of the first terminal device in the above-mentioned embodiment shown in FIG. Operations other than sending and receiving operations.

Alternatively, the transceiver unit 1310 may be configured to perform the sending operation and the receiving operation on the second terminal device side in the above-mentioned embodiment shown in FIG. 5 , and the processing unit 1320 may be configured to perform the above-mentioned in the embodiment shown in FIG. 5 except on the second terminal device Operations other than sending and receiving operations.

Alternatively, the transceiver unit 1310 may be configured to perform the sending operation and the receiving operation on the second terminal device side in the above-mentioned embodiment shown in FIG. 9 , and the processing unit 1320 may be configured to perform the above-mentioned embodiment shown in FIG. 9 except on the second terminal device. Operations other than sending and receiving operations.

When the communication device is a chip-type device or circuit, the device may include a transceiver unit and a processing unit. The transceiver unit may be an input/output circuit and/or a communication interface; the processing unit may be an integrated processor, a microprocessor or an integrated circuit.

When the communication device in this embodiment is a terminal device, reference may be made to the device shown in FIG. 14 . As an example, the device can perform functions similar to the processing module 1010 in FIG. 10 . For example, the processing module 1010 in the above-mentioned embodiment may be the processor 1410 in FIG. 14, and perform corresponding functions; the sending module 1020 in the above-mentioned embodiment may be the transmitting data processor 1420 in FIG. 14, and perform the corresponding functions The receiving module 1030 in the above-mentioned embodiment may be the receiving data processor 1430 in FIG. 14, and perform corresponding functions. For another example, the processing module 1110 in the above-mentioned embodiment may be the processor 1410 in FIG. 14 and complete the corresponding functions; the sending module 1120 in the above-mentioned embodiment may be the transmission data processor 1420 in FIG. 14 and complete the corresponding function. Corresponding functions; the receiving module 1130 in the above-mentioned embodiment may be the receiving data processor 1430 in FIG. 14 , and perform corresponding functions. For another example, the processing module 1210 in the above-mentioned embodiment may be the processor 1410 in FIG. 14 and complete the corresponding functions; the sending module 1220 in the above-mentioned embodiment may be the transmission data processor 1420 in FIG. 14 and complete the corresponding function. Corresponding functions; the receiving module 1230 in the above embodiment may be the receiving data processor 1430 in FIG. 14 , and perform corresponding functions. Although the channel encoder and the channel decoder are shown in FIG. 14 , it can be understood that these modules do not constitute a limitative description of this embodiment, but are only illustrative.

Fig. 15 shows another form of this embodiment. The processing device 1500 includes modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem. The communication apparatus in this embodiment may serve as a modulation subsystem therein. Specifically, the modulation subsystem may include a processor 1503 and an interface 1504 . The processor 1503 completes the functions of the above-mentioned processing module 1010, and the interface 1504 implements the functions of the above-mentioned sending module 1020 and receiving module 1030. Alternatively, the processor 1503 implements the functions of the above-mentioned processing module 1110 , and the interface 1504 implements the functions of the above-mentioned transceiver module 1120 . Alternatively, the processor 1503 implements the functions of the above-mentioned processing module 1210, and the interface 1504 implements the functions of the above-mentioned sending module 1220 and receiving module 1230. As another variant, the modulation subsystem includes a memory 1506, a processor 1503, and a program stored in the memory 1506 and executable on the processor. When the processor 1503 executes the program, the terminal device side in the above method embodiment is implemented. Methods. It should be noted that the memory 1506 can be non-volatile or volatile, and its location can be located inside the modulation subsystem or in the processing device 1500, as long as the memory 1506 can be connected to the The processor 1503 is sufficient.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that a computer can access, or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state disks (SSDs)), and the like.

The various illustrative logic units and circuits described in the embodiments of this application may be implemented by general purpose processors, digital signal processors, application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, Discrete gate or transistor logic, discrete hardware components, or any combination of the above are designed to implement or operate the described functions. A general-purpose processor may be a microprocessor, and alternatively, the general-purpose processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors in combination with a digital signal processor core, or any other similar configuration. accomplish.

The steps of the method or algorithm described in the embodiments of this application may be directly embedded in hardware, a software unit executed by a processor, or a combination of the two. Software units can be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or this In any other form of storage media in the field. Illustratively, a storage medium may be coupled to the processor such that the processor may read information from, and store information in, the storage medium. Optionally, the storage medium can also be integrated into the processor. The processor and storage medium may be provided in the ASIC.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

In one or more exemplary designs, the above functions described in the embodiments of the present application may be implemented in hardware, software, firmware, or any combination of the three. If implemented in software, the functions may be stored on, or transmitted over, a computer-readable medium in the form of one or more instructions or code. Computer-readable media includes computer storage media and communication media that facilitate the transfer of a computer program from one place to another. Storage media can be any available media that a general-purpose or special-purpose computer can access. For example, such computer-readable media may include, but are not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other device that can be used to carry or store instructions or data structures and Other media in the form of program code that can be read by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. In addition, any connection is properly defined as a computer-readable medium, for example, if software is transmitted from a website site, server or other remote source over a coaxial cable, fiber optic computer, twisted pair, digital subscriber line (DSL) Or transmitted by wireless means such as infrared, wireless, and microwave are also included in the definition of computer-readable media. The discs and discs include compact discs, laser discs, optical discs, digital versatile discs (DVDs), floppy discs and Blu-ray discs. Disks usually reproduce data magnetically, while discs usually use Lasers make optical copies of data. Combinations of the above can also be included in computer readable media.

Those skilled in the art should realize that, in one or more of the above examples, the functions described in the embodiments of the present application may be implemented by hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage medium can be any available medium that can be accessed by a general purpose or special purpose computer.

The specific embodiments described above further describe in detail the purposes, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above descriptions are only specific implementations of the embodiments of the present application, and are not intended to be used for The protection scope of the embodiments of the present application is limited, and any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included within the protection scope of the embodiments of the present application. The above description of the specification of the present application can enable any content in the art that can utilize or realize the embodiments of the present application, and any modifications based on the disclosed contents should be considered obvious in the art, and the basic principles described in the embodiments of the present application can be Other variations are applied without departing from the spirit and scope of the invention of the present application. Therefore, the contents disclosed in the embodiments of the present application are not limited to the described embodiments and designs, but can be extended to the widest scope consistent with the principles of the present application and the new features disclosed.

Although the application has been described in conjunction with specific features and embodiments thereof, it will be apparent that various modifications and combinations may be made without departing from the spirit and scope of the embodiments of the application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined by the appended claims, and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of this application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. In this way, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the embodiments of the present application are also intended to include these modifications and variations.

In conjunction with the above, the application also provides the following embodiments:

Embodiment 1, a communication method, comprising:

The first terminal device receives the first identifier from the second terminal device, where the first identifier is the identifier of the second terminal device, wherein the second terminal device provides a relay service for the first terminal device, The first identifier is used to determine the paging occasion of the second terminal device;

The first terminal device sends a first message to the first core network device, where the first message includes the first identifier, and the first message is used to request to update the first terminal device according to the first identifier , the first core network device serves the first terminal device;

The first terminal device receives a second identifier from the first core network device, where the second identifier is an updated identifier of the first terminal device, and the second identifier is used to determine the first terminal The paging timing of the device.

Embodiment 2. The method according to Embodiment 1, wherein the first message further includes first range information, where the first range information is used to indicate a first range, and the first range is the first terminal device The value range of the identifier, or the range to which the time domain distance between the paging occasion determined according to the first identifier and the paging occasion determined according to the second identifier belongs.

Embodiment 3. The method according to Embodiment 2, further comprising:

Embodiment 4. According to the method according to Embodiment 2 or Embodiment 3, the paging occasion determined according to the first identification is the same as the paging occasion determined according to the second identification, or, according to the first identification The time domain distance between the determined paging occasion and the paging occasion determined according to the second identifier is smaller than the first threshold.

Embodiment 5. The method according to any one of Embodiments 1 to 4, wherein the first message further includes a first cause value, where the first cause value is used to indicate the first terminal device For the remote terminal equipment.

Embodiment 6. The method according to any one of Embodiments 1 to 5, the method further comprising:

Embodiment 7. The method according to Embodiment 6, wherein the second message is further used to instruct to modify the length of the DRX cycle to the length of the second cycle.

8. The method according to any one of claims 1 to 7, wherein the second identifier is carried in a configuration update message or in a registration complete message.

Embodiment 9. The method according to any one of Embodiments 1 to 8, the method further comprising:

Embodiment 10. The method according to any one of Embodiments 1 to 9, wherein the first identifier is a first value, and the first value is the 5G-S- of the second terminal device The value of TMSI mod 1024, where mod represents the modulo operation.

Embodiment 11. The method according to any one of Embodiments 1 to 10, the method further comprising:

Embodiment 12, a communication method, comprising:

The second terminal device sends a first identifier to the first terminal device, where the first identifier is the identifier of the second terminal device, wherein the second terminal device provides a relay service for the first terminal device, so The first identifier is used to determine the paging occasion of the second terminal device;

the second terminal device receives a second identification from the first terminal device, the second identification is the identification of the first terminal device, and the second identification is determined according to the first identification, The second identifier is used to determine the paging occasion of the first terminal device.

Embodiment 13. The method according to Embodiment 12, further comprising:

Embodiment 14. According to the method according to Embodiment 12 or Embodiment 13, the paging occasion determined according to the first identifier is the same as the paging occasion determined according to the second identifier, or, according to the first identifier The time domain distance between the determined paging occasion and the paging occasion determined according to the second identifier is smaller than the first threshold.

Embodiment 15. The method according to any one of Embodiments 12 to 14, the method further comprising:

Embodiment 16. The method according to any one of Embodiments 12 to 14, the method further comprising:

Embodiment 17. The method according to Embodiment 16, wherein the second message is further used to instruct to modify the length of the DRX cycle to the length of the second cycle.

Embodiment 18. The method according to Embodiment 16 or Embodiment 17, further comprising:

Embodiment 19. The method according to any one of Embodiments 12 to 18, wherein the first identifier is a first value, and the first value is the 5G-S- of the second terminal device The value of TMSI mod 1024, where mod represents the modulo operation.

Embodiment 20, a communication method, comprising:

The second terminal device receives the first identifier from the first terminal device, the first identifier is the identifier of the first terminal device, and the first identifier is used to determine the paging occasion of the first terminal device;

The second terminal device sends a first message to the second core network device, where the first message includes the first identifier, and the first message is used to request to update the second terminal device according to the first identifier , the second core network device serves the second terminal device;

The second terminal device receives a second identifier from the second core network device, where the second identifier is an updated identifier of the second terminal device, and the second identifier is used to determine the second terminal The paging timing of the device.

Embodiment 21. The method according to Embodiment 20, wherein the first message further includes first range information, where the first range information is used to indicate a first range, and the first range is the first terminal device The value range of the identifier, or the range to which the time domain distance between the paging occasion determined according to the first identifier and the paging occasion determined according to the second identifier belongs.

Embodiment 22. According to the method in Embodiment 20 or Embodiment 21, the paging occasion determined according to the first identifier is the same as the paging occasion determined according to the second identifier, or, according to the first identifier The time domain distance between the determined paging occasion and the paging occasion determined according to the second identifier is smaller than the first threshold.

Embodiment 23. The method according to any one of Embodiments 20 to 22, wherein the first message further includes a first cause value, where the first cause value is used to indicate the second terminal device For the relay terminal equipment.

Embodiment 24. The method according to any one of Embodiments 20 to 23, wherein the second identifier is carried in a configuration update message or in a registration complete message.

Embodiment 25. The method according to any one of Embodiments 20 to 24, wherein the first identifier is a first value, and the first value is the 5G-S- of the second terminal device The value of TMSI mod 1024, where mod represents the modulo operation.

Embodiment 26. The method according to any one of Embodiments 20 to 25, the method further comprising:

The second terminal device monitors paging for the second terminal device according to the paging occasion.

Embodiment 27, a communication device, comprising:

a receiving module, configured to receive a first identifier from a second terminal device, where the first identifier is an identifier of the second terminal device, wherein the second terminal device provides a relay service for the communication apparatus, and the The first identifier is used to determine the paging occasion of the second terminal device;

a sending module, configured to send a first message to the first core network device, where the first message includes the first identifier, and the first message is used to request to update the identifier of the communication device according to the first identifier, the first core network equipment serves the communication device;

The receiving module is further configured to receive a second identifier from the first core network device, where the second identifier is the updated identifier of the communication device, and the second identifier is used to determine the identity of the communication device. paging timing.

Embodiment 28. The communication device according to Embodiment 27, wherein the first message further includes first range information, where the first range information is used to indicate a first range, and the first range is a range of the communication device. The value range of the identifier, or the range to which the time domain distance between the paging occasion determined according to the first identifier and the paging occasion determined according to the second identifier belongs.

Embodiment 29. The communication apparatus according to Embodiment 28, wherein the receiving module is further configured to receive the first range information from the second terminal device.

Embodiment 30. The communication device according to Embodiment 28 or Embodiment 29, the paging occasion determined according to the first identifier is the same as the paging occasion determined according to the second identifier, or, according to the first The time domain distance between the paging occasion determined by the identifier and the paging occasion determined according to the second identifier is smaller than the first threshold.

Embodiment 31. The communication apparatus according to any one of Embodiments 27 to 30, wherein the first message further includes a first cause value, where the first cause value is used to indicate that the communication apparatus is remote terminal equipment.

Embodiment 32. The communication apparatus according to any one of Embodiments 27 to 31, the communication apparatus further comprising a processing module;

The sending module is further configured to send a second message to the second terminal device when the processing module determines that the length of the second cycle is less than the length of the first cycle, where the second message includes the first cycle. Two cycles, the second cycle is the DRX cycle of the communication device.

Embodiment 33. The communication apparatus according to Embodiment 32, wherein the second message is further used to instruct to modify the length of the DRX cycle to the length of the second cycle.

Embodiment 34: The communication apparatus according to any one of Embodiments 27 to 33, wherein the second identifier is carried in a configuration update message or in a registration complete message.

Embodiment 35: In the communication apparatus according to any one of Embodiments 27 to 34, the sending module is further configured to send the second identifier to the second terminal device, and the first The second identifier is used for the second terminal equipment to monitor paging for the communication device.

Embodiment 36. The communication apparatus according to any one of Embodiments 27 to 35, wherein the first identifier is a first value, and the first value is the 5G-S of the second terminal device -The value of TMSI mod 1024, where mod represents the modulo operation.

Embodiment 37. The communication device according to any one of Embodiments 27 to 36,

The receiving module is further configured to receive an acknowledgment message from an access network device, where the acknowledgment message is used to instruct the communication apparatus to enter the RRC disconnected state.

Embodiment 38, a communication device, comprising:

A sending module, configured to send a first identification to a first terminal device, where the first identification is an identification of the communication device, wherein the communication device provides a relay service for the communication device, and the first identification is used for for determining the paging occasion of the communication device;

a receiving module, configured to receive a second identification from the first terminal device, where the second identification is an identification of the first terminal device, and the second identification is determined according to the first identification, and the second identification is determined according to the first identification. The second identifier is used to determine the paging occasion of the first terminal device.

Embodiment 39. The communication apparatus according to Embodiment 38, wherein the sending module is further configured to send first range information to the first terminal device, where the first range information is used to indicate the first range, and the The first range is the value range of the identity of the first terminal device, or the time domain distance between the paging occasion determined according to the first identity and the paging occasion determined according to the second identity belongs. Scope.

Embodiment 40. The communication device according to Embodiment 38 or Embodiment 39, the paging occasion determined according to the first identifier is the same as the paging occasion determined according to the second identifier, or, according to the first The time domain distance between the paging occasion determined by the identifier and the paging occasion determined according to the second identifier is smaller than the first threshold.

Embodiment 41. The communication apparatus according to any one of Embodiments 38 to 40, the communication apparatus further comprising a processing module;

Embodiment 42. The communication apparatus according to any one of Embodiments 38 to 40,

The sending module is further configured to send a first cycle to the first terminal device, where the first cycle is the cycle of the communication device;

Embodiment 43. The communication apparatus according to Embodiment 42, wherein the second message is further used to instruct to modify the length of the DRX cycle to the length of the second cycle.

Embodiment 44. The communication apparatus according to Embodiment 42 or Embodiment 43, the communication apparatus further includes a processing module, and the processing module is configured to negotiate a DRX cycle of the communication apparatus with a second core network device, wherein , the length of the negotiated DRX cycle of the communication device is the same as the length of the second cycle, and the second core network device serves the communication device.

Embodiment 45. The communication apparatus according to any one of Embodiments 38 to 44, wherein the first identifier is a first value, and the first value is the 5G of the second terminal device The value of -S-TMSI mod 1024, where mod represents the modulo operation.

Embodiment 46, a communication device, comprising:

a receiving module, configured to receive a first identifier from a first terminal device, where the first identifier is an identifier of the first terminal device, and the first identifier is used to determine a paging occasion of the first terminal device;

a sending module, configured to send a first message to the second core network device, where the first message includes the first identifier, and the first message is used to request to update the identifier of the communication device according to the first identifier, the second core network equipment serves the communication device;

The receiving module is further configured to receive a second identifier from the second core network device, where the second identifier is the updated identifier of the communication device, and the second identifier is used to determine the identity of the communication device. paging timing.

Embodiment 47. The communication apparatus according to Embodiment 46, wherein the first message further includes first range information, where the first range information is used to indicate a first range, and the first range is the first terminal The value range of the identification of the device, or the range to which the time domain distance between the paging occasion determined according to the first identification and the paging occasion determined according to the second identification belongs.

Embodiment 48. The communication device according to Embodiment 46 or Embodiment 47, the paging occasion determined according to the first identifier is the same as the paging occasion determined according to the second identifier, or, according to the first The time domain distance between the paging occasion determined by the identifier and the paging occasion determined according to the second identifier is smaller than the first threshold.

Embodiment 49. The communication device according to any one of Embodiments 46 to 48, wherein the first message further includes a first cause value, where the first cause value is used to indicate that the communication device is Relay terminal equipment.

Embodiment 50. The communication apparatus according to any one of Embodiments 46 to 49, wherein the second identifier is carried in a configuration update message or in a registration complete message.

Embodiment 51. The communication device according to any one of Embodiments 46 to 50, wherein the first identifier is a first value, and the first value is a 5G-S of the communication device -The value of TMSI mod 1024, where mod represents the modulo operation.

Embodiment 52. The communication apparatus according to any one of Embodiments 46 to 51, the communication apparatus further comprising a processing module;

The receiving module is further configured to monitor paging for the second terminal device according to the paging occasion.

Embodiment 53. A communication apparatus, wherein the communication apparatus comprises a processor and a transceiver (or, a transmitter and a processor), the processor and the transceiver (or, a transmitter and a processor) being coupled , can execute the method described in any one of Embodiments 1 to 11, or execute the method described in any one of Embodiments 12 to 19, or execute the method described in any one of Embodiments 20 to 19. The method of any one of Embodiments 26.

Embodiment 54. A chip, which includes a processor, and when the processor executes an instruction, the processor is configured to execute the method described in any one of the foregoing Embodiments 1 to 11, or to execute any of the methods described in the above embodiments. The method of any one of Embodiments 12 to 19, or performing the method of any one of Embodiments 20 to 26. The instruction can come from memory inside the chip or from memory outside the chip. Optionally, the chip further includes an input and output circuit.

Embodiment 55. A communication system, wherein the communication system includes the communication apparatus according to any one of Embodiments 27 to 37, and any one of Embodiments 38 to 45 said communication device.

Embodiment 56, a communication system, wherein the communication system includes the communication apparatus according to any one of Embodiments 46 to 52.

Embodiment 57. A computer-readable storage medium, wherein the computer-readable storage medium is used to store a computer program, and when the computer program is run on a computer, the computer is made to perform the steps as in Embodiment 1 to Embodiment 1. 11, or perform the method as described in any one of Embodiments 12 to 19, or perform the method as described in any one of Embodiments 20 to 26 method described.

Embodiment 58. A computer program product, where the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer can implement any of the embodiments described in Embodiment 1 to Embodiment 11. method, or implement the method as described in any one of Embodiments 12 to 19, or implement the method as described in any one of Embodiments 20 to 26.

Although the application is described herein in conjunction with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that these measures cannot be combined to advantage.

Claims

A communication method, comprising:

The first terminal device receives the first identifier from the second terminal device, where the first identifier is the identifier of the second terminal device, wherein the second terminal device provides a relay service for the first terminal device, The first identifier is used to determine the paging occasion of the second terminal device;

The first terminal device sends a first message to the first core network device, where the first message includes the first identifier, and the first message is used to request to update the first terminal device according to the first identifier , the first core network device serves the first terminal device;

The first terminal device receives a second identifier from the first core network device, where the second identifier is an updated identifier of the first terminal device, and the second identifier is used to determine the first terminal The paging timing of the device.
The method according to claim 1, wherein the first message further includes first range information, wherein the first range information is used to indicate a first range, and the first range is the first terminal device The value range of the identifier, or the range to which the time domain distance between the paging occasion determined according to the first identifier and the paging occasion determined according to the second identifier belongs.
The method according to claim 2, wherein the method further comprises:

The first terminal device receives the first range information from the second terminal device.
The method according to claim 2 or 3, wherein the paging occasion determined according to the first identification is the same as the paging occasion determined according to the second identification, or the paging occasion determined according to the first identification The time domain distance between the paging occasion and the paging occasion determined according to the second identifier is smaller than the first threshold.
The method according to any one of claims 1 to 4, wherein the first message further includes a first cause value, and the first cause value is used to indicate that the first terminal device is a remote terminal device .
The method according to any one of claims 1 to 5, wherein the method further comprises:

receiving, by the first terminal device, a first cycle from the second terminal device, where the first cycle is a DRX cycle of the second terminal device;

When the length of the second cycle is less than the length of the first cycle, the first terminal device sends a second message to the second terminal device, the second message includes the second cycle, the second The period is the DRX period of the first terminal device.
The method according to claim 6, wherein the second message is further used to instruct to modify the length of the DRX cycle to the length of the second cycle.
The method according to any one of claims 1 to 7, wherein the second identifier is carried in a configuration update message or in a registration complete message.
The method according to any one of claims 1 to 8, wherein the method further comprises:

The first terminal device sends the second identification to the second terminal device, where the second identification is used for the second terminal device to monitor paging for the first terminal device.
The method according to any one of claims 1 to 9, wherein the first identifier is a first value, and the first value is a value of 5G-S-TMSI mod 1024 of the second terminal device value, where mod represents the modulo operation.
The method according to any one of claims 1 to 10, wherein,

The first terminal device sends a request message to the access network device, where the request message is used to request to enter the RRC disconnected state;

The first terminal device receives an acknowledgment message from the access network device, where the acknowledgment message is used to instruct the first terminal device to enter the RRC disconnected state.
A communication method, comprising:

The second terminal device sends a first identifier to the first terminal device, where the first identifier is the identifier of the second terminal device, wherein the second terminal device provides a relay service for the first terminal device, so The first identifier is used to determine the paging occasion of the second terminal device;

the second terminal device receives a second identification from the first terminal device, the second identification is the identification of the first terminal device, and the second identification is determined according to the first identification, The second identifier is used to determine the paging occasion of the first terminal device.
The method of claim 12, wherein the method further comprises:

The second terminal device sends first range information to the first terminal device, where the first range information is used to indicate a first range, and the first range is a value range of the identifier of the first terminal device , or the range to which the time domain distance between the paging occasion determined according to the first identifier and the paging occasion determined according to the second identifier belongs.
The method according to claim 12 or 13, wherein the paging occasion determined according to the first identification is the same as the paging occasion determined according to the second identification, or the paging occasion determined according to the first identification The time domain distance between the paging occasion and the paging occasion determined according to the second identifier is smaller than the first threshold.
The method according to any one of claims 12 to 14, wherein the method further comprises:

determining, by the second terminal device, a paging occasion according to the second identifier;

The second terminal device monitors paging for the first terminal device according to the paging occasion.
The method according to any one of claims 12 to 14, wherein the method further comprises:

sending, by the second terminal device, a first cycle to the first terminal device, where the first cycle is the cycle of the second terminal device;

The second terminal device receives a second message from the first terminal device, the second message includes a second cycle, the second cycle is the DRX cycle of the first terminal device, and the second cycle is The length is less than the length of the first period.
The method according to claim 16, wherein the second message is further used to instruct to modify the length of the DRX cycle to the length of the second cycle.
The method according to claim 16 or 17, wherein the method further comprises:

The second terminal device negotiates the DRX cycle of the second terminal device with the second core network device, wherein the length of the negotiated DRX cycle of the second terminal device is the same as the length of the second cycle, so The second core network device serves the second terminal device.
The method according to any one of claims 12 to 18, wherein the first identifier is a first value, and the first value is a value of 5G-S-TMSI mod 1024 of the second terminal device value, where mod represents the modulo operation.
A communication device, characterized in that it comprises a receiving module, a sending module and a processing module, the receiving module, the sending module and the processing module are coupled and can execute the method according to any one of claims 1 to 11 , or perform the method according to any one of claims 12 to 19 .
A computer-readable storage medium, characterized in that the computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, the computer is made to execute any one of claims 1 to 11. The method of claim 12, or cause the computer to execute the method of any one of claims 12-19.