WO2023143269A1

WO2023143269A1 - Communication method and apparatus

Info

Publication number: WO2023143269A1
Application number: PCT/CN2023/072695
Authority: WO
Inventors: 黄秀璇; 薛松岩; 丁梦颖; 李新县; 彭金磷
Original assignee: 华为技术有限公司
Priority date: 2022-01-27
Filing date: 2023-01-17
Publication date: 2023-08-03
Also published as: CN116566558A

Abstract

The present application relates to the technical field of communications. Disclosed are a communication method and apparatus. The method comprises: a terminal device receiving first information from a network device, wherein the first information is used for instructing to activate a first serving cell of the terminal device, and a carrier of the first serving cell is an uplink carrier; and receiving a downlink synchronization signal on a second serving cell, which is synchronous with the first serving cell, performing downlink synchronization with the first serving cell according to the downlink synchronization signal, and then sending an uplink reference signal to the network device on the first serving cell, wherein the uplink reference signal is used for measuring uplink channel information, and the uplink channel information is used for indicating that the first serving cell has been activated. By using the method, since a carrier of a first serving cell is an uplink carrier, downlink frequency-domain resources can be effectively saved on; and a terminal device does not need to report a CSI report to a network device, such that a time delay for activating a secondary cell can be effectively reduced.

Description

A communication method and device

Cross References to Related Applications

This application claims the priority of the Chinese patent application with the application number 202210101381.7 and the application name "A Communication Method and Device" submitted to the China Patent Office on January 27, 2022, the entire contents of which are incorporated in this application by reference.

technical field

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

Background technique

Carrier aggregation (CA) is to aggregate two or more component carriers (CC) together to provide services for a terminal device to support a larger transmission bandwidth. In the CA scenario, there may be multiple cells that provide services for the terminal device, that is, the terminal device has multiple serving cells. Wherein, the plurality of serving cells of the terminal device include a primary cell (primary cell, PCell) and one or more secondary cells (secondary cell, SCell).

At present, the secondary cell is mainly for the downlink burst service of the terminal equipment. For example, when the network device needs to send downlink burst service data to the terminal device, it can instruct the terminal device to activate the secondary cell, and then the network device can send downlink burst service data to the terminal device through the activated secondary cell.

However, with the diversified development of mobile Internet, Internet of Things and other businesses, the traditional following business models are also undergoing changes, and mobile communication has continuously increased requirements for uploading massive data, such as ultra-high-definition video, intelligent monitoring, virtual reality, Services such as augmented reality and live video broadcasting have higher requirements on uplink capacity. For terminal equipment that mainly provides uplink services, further research is still needed on the implementation of the CA scenario.

Contents of the invention

The present application provides a communication method and device for quickly activating a secondary cell of a terminal device.

In the first aspect, the embodiment of the present application provides a communication method, which can be applied to a terminal device or a module in a terminal device. Taking the method applied to a terminal device as an example, the terminal device receives the first message from the network device, so The first message includes first information, and the first information is used to indicate a first serving cell for activating the terminal device; the first serving cell belongs to a first type of cell, and the carrier of the first type of cell is an uplink carrier; receiving a downlink synchronization signal from the network device on a second serving cell of the terminal device synchronized with the first serving cell, and performing downlink synchronization with the first serving cell according to the downlink synchronization signal; The first serving cell sends an uplink reference signal to the network device, where the uplink reference signal is used to measure uplink channel information, and the uplink channel information is used to indicate that the first serving cell has been activated.

In this way, since the carrier of the first serving cell is an uplink carrier, downlink frequency domain resources can be effectively saved; and the terminal device does not need to report a CSI report to the network device, which can effectively reduce the time delay for activating the secondary cell.

In a possible design, the method further includes: sending capability information of the terminal device to the network device, where the capability information is used to indicate that the terminal device supports the first type of cell.

In a possible design, the synchronization between the first serving cell and the second serving cell includes at least one of the following: an uplink carrier of the first serving cell and an uplink carrier of the second serving cell The frequency domain interval of the first serving cell is less than or equal to the first threshold; the uplink carrier of the first serving cell and the uplink carrier of the second serving cell are located in the same frequency band; the uplink carrier of the first serving cell and the second serving cell The frequency interval between the downlink carriers of the cells is less than or equal to a second threshold; the uplink carrier of the first serving cell and the downlink carrier of the second serving cell are located in the same frequency band.

In a possible design, the method further includes: receiving second information from the network device, where the second information is used to indicate that the second serving cell is synchronized with the first serving cell; wherein, The second information is carried in the first message, or the second information is carried in a second message.

In a possible design, receiving the downlink synchronization signal from the network device on the second serving cell of the terminal device synchronized with the first serving cell includes: receiving a third signal from the network device information, the third information is used to indicate that the third serving cell is synchronized with the first serving cell; wherein, the third information is carried in the first message, or the third information is carried in a third message; When the third serving cell is not activated, receiving a downlink synchronization signal from the network device on a second serving cell of the terminal device that is synchronized with the first serving cell.

In a possible design, the method further includes: sending a random access signal to the network device on the first serving cell.

In a possible design, the random access signal includes a preamble for non-contention random access; the first message further includes fourth information, where the fourth information is used to indicate the preamble.

In a possible design, the random access signal includes a preamble for non-contention random access; the method further includes: sending a first request message to the network device, and the first request message uses For requesting the preamble; receiving fourth information from the network device, the fourth information is used to indicate the preamble, and the fourth information is carried in a fourth message.

In the second aspect, the embodiment of the present application provides a communication method, which can be applied to access network equipment or modules in the access network equipment. Taking the method applied to access network equipment as an example, the access network equipment communicates with the terminal The device sends a first message, where the first message includes first information, and the first information is used to indicate activation of a first serving cell of the terminal device; the first serving cell belongs to a first type of cell, and the first The carrier of a type of cell is an uplink carrier; a downlink synchronization signal is sent on a second serving cell of the terminal device synchronized with the first serving cell, and the downlink synchronization signal is used for the terminal device and the first serving cell The serving cell performs downlink synchronization; receiving an uplink reference signal from the terminal device on the first serving cell, and obtaining uplink channel information according to the measurement of the uplink reference signal, and the uplink channel information is used to indicate the first The service cell is activated.

In a possible design, the method further includes: receiving capability information from the terminal device, where the capability information is used to indicate that the terminal device supports the first type of cell.

In a possible design, the synchronization between the first serving cell and the second serving cell includes at least one of the following: an uplink carrier of the first serving cell and an uplink carrier of the second serving cell The frequency domain interval of the first serving cell is less than or equal to the first threshold; the uplink carrier of the first serving cell and the uplink carrier of the second serving cell are located in the same frequency band; the uplink carrier of the first serving cell and the second serving cell The frequency domain interval between the downlink carriers of the cells is less than or equal to the second threshold; the uplink carrier of the first serving cell and the downlink carrier of the second serving cell are located at the same within the frequency band.

In a possible design, the method further includes: sending second information to the terminal device, where the second information is used to indicate that the second serving cell is synchronized with the first serving cell; wherein, the The second information is carried in the first message, or the second information is carried in a second message.

In a possible design, the method further includes: sending third information to the terminal device, where the third information is used to indicate that a third serving cell is synchronized with the first serving cell; wherein the first The third information is carried in the first message, or the third information is carried in a third message.

In a possible design, the method further includes: receiving a random access signal from the terminal device on the first serving cell.

In a possible design, the random access signal includes a preamble for non-contention random access; the method further includes: receiving a first request message from the terminal device, the first request message It is used to request the preamble; and send fourth information to the terminal device, where the fourth information is used to indicate the preamble, and the fourth information is carried in a fourth message.

In a third aspect, the present application provides a communication device, the communication device has the function of realizing the above first aspect, for example, the communication device includes a corresponding module or unit or means (means) for performing the operations involved in the above first aspect , the modules or units or means may be realized by software, or by hardware, or by executing corresponding software by hardware.

In a possible design, the communication device includes a processing unit and a communication unit, wherein the communication unit can be used to send and receive signals to realize communication between the communication device and other devices; the processing unit can be used to perform the communication Some internal operations of the device. The functions performed by the processing unit and the communication unit may correspond to the operations involved in the first aspect above.

In a possible design, the communication device includes a processor, and the processor can be used to be coupled with the memory. The memory may store necessary computer programs or instructions to realize the functions referred to in the first aspect above. The processor may execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device may implement the method in any possible design or implementation manner in the first aspect above.

In a possible design, the communication device includes a processor and a memory, and the memory can store necessary computer programs or instructions for realizing the functions mentioned in the above first aspect. The processor may execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device may implement the method in any possible design or implementation manner in the first aspect above.

In a possible design, the communication device includes a processor and an interface circuit, where the processor is used to communicate with other devices through the interface circuit, and perform any possible design or implementation in the first aspect above. method.

In a fourth aspect, the present application provides a communication device, which is capable of realizing the functions involved in the above-mentioned second aspect, for example, the communication device includes a module or unit or means corresponding to performing the operations involved in the above-mentioned second aspect. The above functions, units or means can be realized by software, or by hardware, or by executing corresponding software by hardware.

In a possible design, the communication device includes a processing unit and a communication unit, wherein the communication unit can be used to send and receive signals to realize communication between the communication device and other devices, for example, the communication unit is used to send set up The device sends system information; the processing unit can be used to perform some internal operations of the communication device. The functions performed by the processing unit and the communication unit may correspond to the operations involved in the second aspect above.

In a possible design, the communication device includes a processor, and the processor can be used to be coupled with the memory. The memory may store necessary computer programs or instructions to realize the functions referred to in the second aspect above. The processor may execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device may implement the method in any possible design or implementation manner of the second aspect above.

In a possible design, the communication device includes a processor and a memory, and the memory can store necessary computer programs or instructions for realizing the functions mentioned in the second aspect above. The processor may execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device may implement the method in any possible design or implementation manner of the second aspect above.

In a possible design, the communication device includes a processor and an interface circuit, where the processor is used to communicate with other devices through the interface circuit, and execute the method in any possible design or implementation of the second aspect above .

It can be understood that, in the above third and fourth aspects, the processor can be implemented by hardware or by software. When implemented by hardware, the processor can be a logic circuit, integrated circuit, etc.; when implemented by software When implemented, the processor may be a general-purpose processor, which is realized by reading software codes stored in the memory. In addition, there may be one or more processors, and one or more memories. The memory can be integrated with the processor, or the memory can be separated from the processor. In a specific implementation process, the memory and the processor can be integrated on the same chip, or they can be respectively arranged on different chips. The embodiment of the present application does not limit the type of the memory and the arrangement of the memory and the processor.

In a fifth aspect, the present application provides a communication system, which may include the communication device provided in the above third aspect and the communication device provided in the above fourth aspect.

In a sixth aspect, the present application provides a computer-readable storage medium, where computer-readable instructions are stored in the computer-readable medium, and when a computer reads and executes the computer-readable instructions, the computer executes the above-mentioned first aspect and A method in any of the possible designs of the second aspect.

In a seventh aspect, the present application provides a computer program product. When a computer reads and executes the computer program product, the computer executes the method in any possible design of the first aspect and the second aspect above.

In an eighth aspect, the present application provides a chip, the chip includes a processor, the processor is coupled with a memory, and is used to read and execute a software program stored in the memory, so as to realize the above-mentioned first aspect and second Aspects of any one of the possible design methods.

These or other aspects of the present application will be more concise and understandable in the description of the following embodiments.

Description of drawings

FIG. 1 is a schematic diagram of a communication system applicable to an embodiment of the present application;

FIG. 2 is a schematic diagram of carrier aggregation provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a possible implementation process for a network device to activate a secondary cell provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of a time delay for activating a secondary cell provided in an embodiment of the present application;

FIG. 5 is a schematic flowchart corresponding to the communication method provided in Embodiment 1 of the present application;

FIG. 6 is a schematic diagram of a time delay for activating a first serving cell provided in an embodiment of the present application;

FIG. 7 is a schematic diagram of a time delay for activating a first serving cell provided in an embodiment of the present application;

FIG. 8 is a schematic flowchart corresponding to the communication method provided in Embodiment 2 of the present application;

FIG. 9 is a possible exemplary block diagram of a device involved in an embodiment of the present application;

FIG. 10 is a schematic structural diagram of an access network device provided in an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

FIG. 1 is a diagram of a communication system applicable to an embodiment of the present application. As shown in FIG. 1 , the communication system may include one or more network devices (such as network device 101 ) and one or more terminal devices (such as terminal device 1021 , terminal device 1022 , and terminal device 1023 ). The embodiment of the present application does not limit the number of network devices and terminal devices included in the communication system, and the above-mentioned communication system may include other devices or network elements besides network devices and terminal devices, such as core network devices etc., and this embodiment of the present application is not limited thereto.

The network device 101 can communicate with the terminal device 1021, the terminal device 1022, or the terminal device 1023 through air interface resources, and optionally, the terminal device 1021 and the terminal device 1022 can use sidelink (sidelink, SL) resources to communicate. Wherein, the sidelink communication between the terminal device 1021 and the terminal device 1022 may be device-to-device (device-to-device, D2D) communication, or may be V2X (vehicle to everything, V2X) communication.

The terminal equipment involved in this embodiment of the present application can also be referred to as a terminal, which can be a device with a wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on water (such as Ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.). The terminal device may be user equipment (user equipment, UE), where the UE includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device with a wireless communication function. Exemplarily, the UE may be a mobile phone (mobile phone), a tablet computer or a computer with a wireless transceiver function. The terminal device can also be a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a smart Wireless terminals in power grids, wireless terminals in smart cities, wireless terminals in smart homes, etc. In the embodiment of the present application, the device for realizing the function of the terminal device may be the terminal device; it may also be a device capable of supporting the terminal device to realize the function, such as a chip system, and the device may be installed in the terminal device. In the embodiment of the present application, the system-on-a-chip may be composed of chips, or may include chips and other discrete devices. In the technical solutions provided in the embodiments of the present application, the technical solutions provided in the embodiments of the present application are described by taking the terminal equipment as an example for realizing the terminal functions.

The network equipment involved in this embodiment of the present application includes access network equipment, such as a base station (base station, BS). The BS may be a device deployed in a wireless access network and capable of performing wireless communication with a terminal. Among them, the base station may have various forms, such as a macro base station, a micro base station, a relay station, and an access point. Exemplarily, the network device involved in this embodiment of the present application may be a next-generation Node B (next-generation Node B, gNB), a transmission reception point (transmission reception point, TRP), an evolved Node B (evolved Node B, eNB )wait. In addition, in a network structure, a network device may include a centralized unit (centralized unit, CU) node and a distributed unit (distributed unit, DU) node. The CU implements some functions of the network equipment, and the DU implements some functions of the network equipment. For example, the CU is responsible for processing non-real-time protocols and services, and realizing functions of radio resource control (radio resource control, RRC) and packet data convergence protocol (packet data convergence protocol, PDCP) layers. The DU is responsible for processing physical layer protocols and real-time services, and realizes functions of a radio link control (radio link control, RLC) layer, a media access control (media access control, MAC) layer, and a physical (physical, PHY) layer. In the embodiment of this application, the functions used to realize the network equipment The capable device may be a network device; it may also be a device capable of supporting the network device to realize the function, such as a chip system, and the device 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 apparatus for realizing the functions of the network equipment as network equipment and taking the network equipment as a base station as an example.

It can be understood that the communication system shown in FIG. 1 may support various radio access technologies (radio access technology, RAT). For example, the communication system shown in FIG. 1 may be a fourth generation (4th generation, 4G) communication system (also known as long term evolution (long term evolution, LTE) communication system), fifth generation (5th generation, 5G) communication system (also known as new radio (new radio, NR) communication system), or future-oriented evolutionary system. The communication system and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. For the evolution of the system and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

The relevant technical features involved in the embodiments of the present application will be explained firstly below. It should be noted that these explanations are for the purpose of making the embodiments of the present application easier to understand, and should not be regarded as limiting the scope of protection required by the present application.

(1) Frequency band, carrier

A frequency band (band) may also be referred to as a frequency band, and may refer to a section of frequency or a frequency range. A 5G communication system may include multiple frequency bands, such as n1, n2, n41, n78, and so on. n1, n2, n41, n78, etc. can be understood as frequency band numbers. Each frequency band number is used to identify a preset frequency range. For example, the frequency range identified by n41 includes 2496MHz-2690MHz. The frequency range described here is the frequency range of the above link. as an example.

One or more carriers can be included in one frequency band. The carrier can be divided into an uplink carrier and a downlink carrier. The uplink carrier is used for uplink communication between the terminal device and the network device, and the downlink carrier is used for the downlink communication between the terminal device and the network device.

(2) Type of community

A cell may include one or more uplink carriers and/or one downlink carrier. In the embodiment of the present application, according to different carriers included in the cell, the cell can be divided into three types of cells. Wherein, the carriers of the first type of cells only include uplink carriers, not downlink carriers; that is, the first type of cells are used for uplink communication between terminal equipment and network equipment. The carriers of the second type of cells only include downlink carriers, not uplink carriers; that is, the second type of cells are used for downlink communication between terminal equipment and network equipment. The carriers of the third type of cells include uplink carriers and downlink carriers; that is, the third type of cells can be used for uplink communication and downlink communication between terminal equipment and network equipment.

When a certain cell (the cell may belong to the first type of cell or the third type of cell) includes multiple uplink carriers, the multiple uplink carriers may include one normal uplink (NUL) carrier and at least one supplementary uplink (supplementary uplink) , SUL) carrier. Here, a brief description of the SUL carrier: When the terminal device needs to send uplink data on the cell, the terminal device can dynamically select the transmission link between the SUL carrier and the NUL carrier of the cell, but usually, at the same time , the terminal device can only select one of the carriers to send uplink data, but cannot send uplink data on the SUL carrier and the NUL carrier at the same time. The SUL carrier and the NUL carrier of a cell can share a set of uplink timing advance (timing advance, TA). The embodiments of the present application will be described below by taking a cell including one uplink carrier (that is, not including a SUL carrier) as an example.

When a certain cell (the cell may belong to the third type of cell) includes a downlink carrier and an uplink carrier, if time division duplexing (time division duplexing, TDD) mode is adopted, the downlink carrier and uplink carrier included in the cell can be For the same carrier, if the frequency division duplexing (frequency division duplexing, FDD) method is used, Then the downlink carrier and the uplink carrier included in the cell may be different carriers, and generally, the frequency domain interval between the downlink carrier and the uplink carrier is relatively small.

(3) Primary cell and secondary cell

Carrier aggregation is to aggregate two or more carrier units (referred to as carriers for short) together to provide services for one terminal device. In order to efficiently utilize the fragmented frequency spectrum, carrier aggregation supports aggregation between different carriers. The different carriers mentioned here can be carriers with the same bandwidth or different bandwidths, or adjacent or non-adjacent carriers in the same frequency band, or Carriers in different frequency bands. Based on this, carrier aggregation can be divided into intra-band continuous carrier aggregation, intra-band non-consecutive carrier aggregation, and inter-frequency non-consecutive carrier aggregation, as shown in FIG. 2 . It can be understood that, in FIG. 2, aggregation of two carriers is taken as an example for illustration.

After carrier aggregation is introduced, cells that provide services (such as uplink and downlink transmission) for terminal devices may include a primary cell and one or more secondary cells. That is to say, the primary cell of the terminal device and all the secondary cells are serving cells of the terminal device. Carrier aggregation supports terminal devices to transmit data on the primary cell and the secondary cell at the same time. For example, when the primary cell and the secondary cell both include uplink carriers, the terminal device can send uplink data to the network device on the primary cell and the secondary cell at the same time; When both the primary cell and the secondary cell include downlink carriers, the terminal device can simultaneously receive downlink data sent by the network device on the primary cell and the secondary cell.

Wherein, the primary cell may be a cell on which the terminal device performs initial connection establishment, or the primary cell may be a cell on which the terminal device performs RRC connection reestablishment, or the primary cell may be a primary cell designated during a handover (handover) process, etc. The primary cell can be used for RRC communication between the network device and the terminal device. Exemplarily, the carrier of the primary cell may include a downlink carrier and an uplink carrier, that is, the primary cell belongs to the third type of cell.

The secondary cell can be used to provide additional radio resources, for example, there is no RRC communication between the secondary cell and the terminal equipment. The secondary cell can be added/modified/released through the RRC reconfiguration message after the initial security activation procedure (initial security activation procedure). Exemplarily, the secondary cell may include a downlink carrier and/or an uplink carrier, that is, the secondary cell may belong to the first type of cell, or may also belong to the second type of cell, or may also belong to the third type of cell.

(4) Status of the secondary cell

The state of the secondary cell may include an activated state and a deactivated state.

When the secondary cell is in the activated state, the terminal device can perform at least one of the following operations in the carrier unit corresponding to the secondary cell: sending semi-persistent scheduling (semi-persistent scheduling, SPS); reporting channel state information (channel state information, CSI) ; Detecting the physical downlink control channel (physical downlink control channel, PDCCH) used for the secondary cell and the PDCCH transmitted on the secondary cell. When carrier aggregation is configured with cross-carrier scheduling, if the secondary cell is scheduled by another cell, there will be a PDCCH of the scheduled secondary cell on the scheduling cell, and this PDCCH is called a PDCCH for the secondary cell. In addition, if the network device is configured to send a physical uplink control channel (physical uplink control channel, PUCCH) on the carrier of the secondary cell, when the secondary cell is activated, the terminal device can send the PUCCH on the carrier of the secondary cell.

When the secondary cell is in the deactivated state, the terminal device does not send a sounding reference signal (sounding reference signal, SRS), does not report CSI, and does not transmit uplink data in the carrier unit corresponding to the secondary cell, where the uplink data includes the uplink shared channel ( uplink shared channel (UL-SCH) and random access channel (random access channel, RACH), not detecting the PDCCH used for the secondary cell and transmitted on the secondary cell, and not sending the PUCCH.

The state of the secondary cell can be switched between an activated state and a deactivated state. Specifically, after the network device configures the secondary cell for the terminal device, the secondary cell is in a deactivated state. Network devices can determine whether to activate for terminal devices according to actual needs For the secondary cell, when the network device determines that the secondary cell of the terminal device needs to be activated, it can send an activation command to the terminal device, and then the terminal device can activate the secondary cell according to the activation command, so that the state of the secondary cell changes from a deactivated state to an activated state. Further, for the secondary cell in the activated state, the network device can send a deactivation command to the terminal device, and then the terminal device can deactivate the secondary cell according to the deactivation command; or, the terminal device can also deactivate the secondary cell after the deactivation timer expires. Activate the secondary cell. Wherein, the timing duration of the deactivation timer may be configured by the network device for the terminal device.

(5) Downlink synchronization

In a 5G communication system, a network device may send a downlink synchronization signal in a cell, and the downlink synchronization signal may be, for example, a synchronization signal/physical broadcast channel block (synchronization signal/physical broadcast channel block, SSB). The SSB may include a primary synchronization signal (primary synchronization signal, PSS), a secondary synchronization signal (secondary synchronization signal, SSS), and a physical broadcast channel ( physical broadcast channel , PBCH). Correspondingly, the terminal device can receive the SSB, and perform downlink synchronization with the cell according to the SSB.

Among them, the PSS can be used to transmit the cell number, and the SSS can be used to transmit the cell group number. The cell number and the cell group number together determine the physical cell identity (PCI) in the 5G communication system. Once the terminal device successfully searches the PSS and SSS on a carrier, it also knows the physical cell identity of the cell where the carrier is located.

Further, the terminal device can also parse the system information in the SSB, the system information in the SSB is carried by the PBCH channel, the system information in the SSB includes a main information block (main information block, MIB), and the MIB can include a system frame number , initial access subcarrier spacing, and other information. The terminal device can also receive other possible system messages of the cell, such as a system information block (system information block, SIB) 1 . SIB1 is transmitted on the physical downlink shared channel (PDSCH) at a period of 160 milliseconds. Since the terminal device has obtained the parameters used for SIB1 transmission and the distribution of control resources for scheduling it in the MIB carried by the PBCH, Therefore SIB1 can be received.

(6) Uplink synchronization

After performing downlink synchronization with the cell, the terminal device also needs to perform uplink synchronization with the cell before performing uplink transmission. For example, a terminal device may perform uplink synchronization with a cell through a random access procedure. During the random access process, the terminal device can send a random access signal to the network device on the cell, and after receiving the random access signal, the network device can obtain the uplink synchronization information of the terminal device by measuring the random access signal, such as Uplink the TA, and send a timing advance command to the terminal device, and then the terminal device can obtain the uplink TA according to the timing advance command. Wherein, the random access signal may include a preamble (preamble).

Exemplarily, each cell can have 64 available preambles, and according to whether the preamble sent by the terminal device is selected by the terminal device itself, the random access process can be divided into a contention-based random access process and a non-contention-based random access process. random access process. Among them, the contention-based random access process refers to: the terminal device selects a preamble from multiple preambles available in the cell, and sends the selected preamble to the network device; the non-contention-based random access process refers to: the network The device indicates a preamble to the terminal device, and then the terminal device can send the indicated preamble to the network device. For example, the network device may indicate a preamble to the terminal device through SIB1.

Based on the description of the above-mentioned related technical features, when the terminal device mainly has downlink services, the secondary cell configured by the network device for the terminal device may include a downlink carrier, and then when the terminal device has a large amount of downlink transmission requirements, the network device may be the terminal device Activate the secondary cell (that is, activate the downlink carrier of the secondary cell) to provide additional frequency domain resources to meet downlink transmission requirements.

Aiming at this situation, the following is a possible implementation flow for the network device in the embodiment of this application to activate the secondary cell process is described.

Fig. 3 is a schematic diagram of a possible implementation process for a network device to activate a secondary cell. As shown in Figure 3, the process can include:

S301. The network device sends downlink scheduling information to the terminal device; correspondingly, the terminal device receives the downlink scheduling information.

Exemplarily, the network device may send downlink scheduling information to the terminal device on the primary cell, the downlink scheduling information may be carried in the PDCCH, the downlink scheduling information is used to schedule the PDSCH, and the activation command may be carried in the PDSCH.

S302, the network device sends an activation command to the terminal device; correspondingly, the terminal device may receive the activation command from the network device according to the downlink scheduling information. Wherein, the activation command is used to instruct the terminal equipment to activate a certain secondary cell, such as secondary cell 1.

S303. The terminal device sends feedback information to the network device, where the feedback information is used to indicate that the activation command is successfully received.

Here, the feedback information may be an acknowledgment (acknowledgment, ACK) of a hybrid automatic repeat request (HARQ).

In the embodiment of the present application, the time delay for the terminal device to generate feedback information for the PDSCH containing the activation command after receiving the activation command may be expressed as T _HARQ , as shown in FIG. 4 .

S304. The terminal device processes the activation command.

S305. The terminal device receives a downlink synchronization signal on the secondary cell 1 according to the activation command, and performs downlink synchronization with the secondary cell 1 according to the received downlink synchronization signal.

Optionally, in S305, the terminal device may also perform other possible operations, such as adjusting the automatic gain control (autonomous gain control, AGC) of the secondary cell 1, and the frequency tracking loop (frequency tracking loop, FTL) and/or time Tracking loop (time tracking loop, TTL).

In the embodiment of the present application, the time delay for the terminal device to process the activation command, and the time delay for the terminal device to perform downlink synchronization (and AGC, FTL, TTL), etc. can be expressed as T _{activation_time} , as shown in FIG. 4 .

S306, the terminal device receives the downlink reference signal on the secondary cell 1, performs CSI measurement according to the downlink reference signal, and then sends a CSI report to the network device; correspondingly, after receiving the CSI report, the network device can determine that the secondary cell 1 has been activated. Here, since the network device can send downlink data to the terminal device on the secondary cell only after obtaining the downlink channel state information, the activation of the secondary cell is marked by the network device receiving a CSI report.

Here, the downlink reference signal may be a downlink channel state information reference signal (channel state information reference signal, CSI-RS). The CSI report may include at least one of the following: downlink channel quality indicator (CQI), precoding matrix indicator (precoding matrix indicator, PMI), CSI-RS resource indicator (CSI-RS resource indicator, CRI), physical Layer reference signal received power (layer 1reference signal received power, L1-RSRP).

In the embodiment of the present application, the time delay for the terminal device to perform CSI measurement and report the CSI report may be expressed as T _{CSI_Reporting} , as shown in FIG. 4 .

S307, the terminal device sends a random access signal to the network device on the secondary cell 1; correspondingly, the network device receives the random access signal.

S308, the network device determines the uplink TA of the terminal device according to the random access signal, and sends the uplink TA to the terminal device; correspondingly, the terminal device can receive the uplink TA, and realize uplink synchronization with the secondary cell 1 according to the uplink TA.

S309, the terminal device sends an uplink reference signal for measuring uplink channel information to the network device on the secondary cell according to the uplink TA; correspondingly, the network device can receive the uplink reference signal, and measure and obtain uplink channel information according to the uplink reference signal.

Here, the uplink reference signal used to obtain the uplink channel information may be an SRS, and the SRS may be carried in SRS resources, and the SRS resources may be configured by the network device for the terminal device through SIB1.

It can be seen from FIG. 4 that, using the method shown in FIG. 3 , the time delay for activating the secondary cell may include T _HARQ , T _{activation_time} and T _{CSI_Reporting} .

With the diversified development of mobile Internet, Internet of Things and other services, the traditional downlink-based business model is also changing, and mobile communications put forward higher requirements for uplink capacity.

Considering that the terminal device may not need to receive downlink data on the downlink carrier when the terminal device is mainly used for uplink services, therefore, in the embodiment of the present application, for the terminal device mainly used for uplink services, in the process of activating the secondary cell In this method, the terminal device does not need to report the CSI report to the network device, and compared with the method shown in FIG. 3 , it can effectively reduce the time delay for activating the secondary cell.

The communication method provided by the embodiment of the present application will be described in detail below in combination with Embodiment 1 and Embodiment 2.

Embodiment one

FIG. 5 is a schematic flowchart corresponding to the communication method provided in Embodiment 1 of the present application. As shown in FIG. 5, the method includes:

S501. The network device sends a first message to the terminal device, where the first message includes first information, and the first information is used to indicate a first serving cell for activating the terminal device; correspondingly, the terminal device receives the first message.

Here, the first serving cell may be one of multiple secondary cells configured by the network device for the terminal device. The first serving cell may belong to the first type of cell. For example, the carrier of the first serving cell includes uplink carrier 1; in this case, since the first serving cell does not include a downlink carrier, frequency domain resources can be effectively saved, and terminal equipment can be satisfied. uplink transmission requirements. Alternatively, the first serving cell may also belong to the third type of cell. For example, the carriers of the first serving cell include uplink carrier 1 and downlink carrier 1; in this case, if the network device determines that the terminal devices served by the first serving cell are all When the terminal equipment mainly uses uplink services, there is no need to send downlink signals (such as downlink synchronization signals and downlink reference signals) on the downlink carrier 1, thereby effectively reducing power consumption of the network equipment.

Exemplarily, the first message may be a MAC layer message, such as a MAC control element (control element, CE). In this case, before S501, the network device may send a PDCCH to the terminal device. The PDCCH includes downlink scheduling information, and the downlink The scheduling information is used to schedule the first message, as shown in FIG. 6 ; or, the first message may be a physical layer message, such as DCI, as shown in FIG. 7 .

Exemplarily, before S501, the network device may send a capability query message to the terminal device, and correspondingly, after receiving the capability query message, the terminal device may send capability information of the terminal device to the network device. The capability information is used to indicate that the terminal device supports the first type of cell. Furthermore, after learning that the terminal device supports the first type of cell according to the capability information of the terminal device, the network device may add the first type of cell as the secondary cell of the terminal device. For example, the capability information of the terminal device may include the identification of the frequency band (such as the first frequency band) supported by the terminal device and the cell type (such as the first type of cell) supported by the terminal device on the first frequency band, and the network device may configure the first frequency band for the terminal device. A cell of the first type on a frequency band is used as a secondary cell of the terminal device.

It can be understood that, in other possible examples, the network device may not send a capability query message, but the terminal device actively reports the capability information, which is not limited in this embodiment of the present application.

S502. The network device sends a downlink synchronization signal on the second serving cell that is synchronized with the first serving cell; correspondingly, the terminal device receives the downlink synchronization signal from the network device on the second serving cell, and uses the downlink synchronization signal and the first The serving cell performs downlink synchronization.

Exemplarily, after receiving the first information, if the terminal device determines that the first condition is met, it may determine a second serving cell that is synchronized with the first serving cell, and then receive a downlink synchronization signal from the network device on the second serving cell , and perform downlink synchronization with the first serving cell according to the downlink synchronization signal.

First, an introduction is made on satisfying the first condition.

Satisfying the first condition may include: (1) the first serving cell belongs to the first type of cell; or (2) the first serving cell belongs to the third type of cell, but the downlink carrier of the first serving cell does not need to be activated. Regarding (2), there may be multiple ways for the terminal device to determine that the downlink carrier of the first serving cell does not need to be activated. For example, method 1: when adding the first serving cell to the terminal device, the network device can pre-instruct the terminal device not to activate the downlink carrier of the first serving cell, and then the terminal device will not activate the first serving cell every time it activates the first serving cell. The downlink carrier of the serving cell. Another example is method 2: the network device indicates through the first information that the terminal device does not need to activate the downlink carrier of the first serving cell, and then the terminal device can determine that when activating the first serving cell this time, it does not need to activate the downlink carrier of the first serving cell according to the first information. downlink carrier. As another example of mode 3, if the terminal device receives the second information or the third information (refer to the description below) sent by the network device, it may determine that the downlink carrier of the first serving cell does not need to be activated.

Second, the synchronization between the first serving cell and the second serving cell is introduced.

Synchronization between the first serving cell and the second serving cell may mean that the first serving cell and the second serving cell can share information, such as sharing downlink information, and the downlink information may include downlink synchronization information, and optionally, may also include downlink path loss information, reference signal receiving power (reference signal receiving power, RSRP) or reference signal receiving quality (reference signal receiving quality, RSRQ), etc.

As a possible implementation, as mentioned above, the uplink carrier and downlink carrier of a cell can be the same carrier or the frequency domain interval between the two is usually small. Therefore, in the embodiment of this application, the network device or terminal The device may determine whether the first serving cell and the second serving cell are synchronized according to the positional relationship between the carrier of the first serving cell (such as an uplink carrier or a downlink carrier) and the carrier of a second serving cell (such as an uplink carrier or a downlink carrier).

For example, when the first serving cell belongs to the first type of cell, the synchronization between the first serving cell and the second serving cell may include at least one of the following: (1) the difference between the uplink carrier of the first serving cell and the uplink carrier of the second serving cell The frequency domain interval between is less than or equal to the first threshold. (2) The uplink carrier of the first serving cell and the uplink carrier of the second serving cell are located in the same frequency band. (3) The frequency domain separation between the uplink carrier of the first serving cell and the downlink carrier of the second serving cell is less than or equal to the second threshold. (4) The uplink carrier of the first serving cell and the downlink carrier of the second serving cell are located in the same frequency band. Wherein, the first threshold or the second threshold may be pre-agreed by the protocol, or may be pre-configured by the network device for the terminal device.

For another example, when the first serving cell belongs to the third type of cell, the synchronization between the first serving cell and the second serving cell may include at least one of the following: (1) the uplink carrier of the first serving cell and the uplink carrier of the second serving cell The frequency domain interval between is less than or equal to the first threshold. (2) The uplink carrier of the first serving cell and the uplink carrier of the second serving cell are located in the same frequency band. (3) The frequency domain separation between the uplink carrier of the first serving cell and the downlink carrier of the second serving cell is less than or equal to the second threshold. (4) The uplink carrier of the first serving cell and the downlink carrier of the second serving cell are located in the same frequency band. (5) The frequency domain separation between the downlink carrier of the first serving cell and the uplink carrier of the second serving cell is less than or equal to the third threshold. (6) The downlink carrier of the first serving cell and the uplink carrier of the second serving cell are located in the same frequency band.

(7) The frequency domain separation between the downlink carrier of the first serving cell and the downlink carrier of the second serving cell is less than or equal to the fourth threshold. (8) The downlink carrier of the first serving cell and the downlink carrier of the second serving cell are located in the same frequency band. Wherein, the third threshold or the fourth threshold may be pre-agreed by the protocol, or may be pre-configured by the network device for the terminal device.

It can be understood that, when describing the synchronization between the first serving cell and the second serving cell, it is taken as an example that the serving cell of the terminal device includes one uplink carrier. When the serving cell of the terminal device includes multiple uplink carriers, for example, the first serving cell includes multiple uplink carriers, the above-mentioned "uplink carrier of the first serving cell" may refer to one of the multiple uplink carriers of the first serving cell Uplink carrier; that is to say, for example, "the frequency domain interval between the uplink carrier of the first serving cell and the uplink carrier of the second serving cell is less than or equal to the first threshold" may refer to multiple uplink carriers of the first serving cell There is an uplink carrier a among the carriers, and the frequency domain separation between the uplink carrier a and the uplink carrier of the second serving cell is less than or equal to the first threshold. For another example that the second serving cell includes multiple uplink carriers, the above-mentioned "uplink carrier of the second serving cell" may refer to one of the multiple uplink carriers of the second serving cell; that is, for example, the above-mentioned "first The frequency domain interval between the uplink carrier of the serving cell and the uplink carrier of the second serving cell is less than or equal to the first threshold" may mean that there is an uplink carrier b among the multiple uplink carriers of the second serving cell, and the uplink carrier b of the first serving cell The frequency domain interval between the uplink carrier and the uplink carrier b is less than or equal to the first threshold.

Thirdly, an implementation manner for the terminal device to determine a second serving cell that is synchronized with the first serving cell is introduced.

In the embodiment of the present application, there may be multiple implementation manners for the terminal device to determine the second serving cell that is synchronized with the first serving cell.

For example, mode 1: the network device may send second information to the terminal device, where the second information is used to indicate that the second serving cell is synchronized with the first serving cell. Correspondingly, after receiving the second information, the terminal device determines that the state of the second serving cell is the activated state, and the terminal device can receive the downlink synchronization signal from the network device on the second serving cell. Wherein, the second serving cell may be a primary cell of the terminal device or may also be a secondary cell other than the first serving cell. The second information and the first information can be carried in the same message (such as the first message), or can also be carried in different messages, such as the second information is carried in the second message, and the second message can be a message of the physical layer or a message of the MAC layer. message or RRC message.

Another example is mode 2: the network device may send third information to the terminal device, where the third information is used to indicate that the third serving cell is synchronized with the first serving cell. Correspondingly, after receiving the second information, the terminal device determines that the state of the third serving cell is deactivated (that is, the third serving cell is not activated), and then the terminal device can select from the activated serving cells to communicate with the first serving cell. The synchronized second serving cell further receives a downlink synchronization signal from the network device on the second serving cell. Wherein, the third serving cell may be a secondary cell other than the first serving cell. The third information and the first information can be carried in the same message (such as the first message), or can also be carried in different messages, such as the third information is carried in the third message, and the third message can be a message of the physical layer or a message of the MAC layer. message or RRC message.

Another example is method 3: the network device does not need to indicate to the terminal device the cell that is synchronized with the first serving cell, but the terminal device directly selects the second serving cell that is synchronized with the first serving cell from the activated serving cells, thereby facilitating Effectively save transmission resources between terminal equipment and network equipment.

Wherein, in the above-mentioned mode 2 or mode 3, the terminal device may, according to the location relationship between the carrier of the activated serving cell (such as the uplink carrier or the downlink carrier) and the carrier of the first serving cell (such as the uplink carrier or the downlink carrier), from the activated A second serving cell that is synchronized with the first serving cell is selected from the activated serving cells.

Optionally, in the above S502, the terminal device may also perform other possible operations, such as adjusting the AGC, FTL and/or TTL of the first serving cell.

S503. The terminal device sends a random access signal to the network device on the first serving cell; correspondingly, the network device can receive the random access signal.

As mentioned above, since the first serving cell belongs to the first type of cell, or the first serving cell belongs to the third type of cell, but there is no need to activate the downlink carrier of the first serving cell, therefore, the terminal device does not need to connect to the first serving cell. To receive the downlink reference signal, there is no need to report the CSI report to the network device. That is, after the terminal device completes downlink synchronization according to the downlink synchronization signal, it can send a random access signal to the network device on the first serving cell.

The random access signal may include a first preamble for contention random access; or, the random access signal may also include a second preamble for non-contention random access. When the random access signal includes the second preamble, the second preamble may be indicated by the network device to the terminal device.

There may be multiple manners in which the network device indicates the second preamble to the terminal device. For example, method 1: the network device can actively send the fourth information to the terminal device, the fourth information is used to indicate the second preamble, the fourth information and the first information can be carried in the same message (such as the first message), or can also carry Different from different messages, for example, the fourth information is carried in the fourth message, and the fourth message may be a physical layer message, a MAC layer message, or an RRC message.

Another example is mode 2: the terminal device sends a first request message to the network device, and the first request message is used to request a preamble for non-contention random access; correspondingly, after receiving the first request message, the network device may send the terminal The device sends fourth information. That is to say, the network device may send the fourth information to the terminal device based on the request of the terminal device. In this case, the fourth information and the first information may be carried in different messages, for example, the fourth information is carried in a fourth message. Exemplarily, the terminal device may send the first request message to the network device after performing downlink synchronization with the first service message. In this way, the network device can feed back the fourth information to the terminal device in real time based on the request of the terminal device, thus having higher flexibility; and the fourth information and the first information are carried in different messages, which can effectively save the activation of the first Resource occupancy in the first message when serving a cell.

As a possible implementation, before the terminal device sends a random access signal to the network device on the first serving cell, it can send an uplink reference signal for uplink beam management to the network device on the first serving cell, so as to determine the target beam , and then use the target beam to send a random access signal. For implementation of determining the target beam, reference may be made to the prior art.

In addition, in S503, after receiving the random access signal, the network device can obtain the uplink TA of the terminal device by measuring the random access signal, and send a timing advance command to the terminal device; furthermore, the terminal device can obtain the uplink TA according to the timing advance command. The TA implements uplink synchronization with the first serving cell.

In other possible embodiments, the terminal device may determine whether it is necessary to send a random access signal to the network device on the first serving cell to obtain an uplink TA, and if necessary, may send a random access signal to the network device on the first serving cell. The uplink TA can be obtained by using the incoming signal. If not needed, the uplink TA of the fourth serving cell can be used as the uplink TA of the first serving cell. Among them, the terminal device can determine whether it is necessary to send a random access signal to the network device on the first serving cell to obtain an uplink TA. There are many implementations. For example, the network device can send sixth information to the terminal device. When the device needs to send a random access signal to the network device on the first serving cell to obtain an uplink TA, the terminal device can send a random access signal to the network device on the first serving cell; when the sixth information indicates that the terminal device does not need to be in When the first serving cell sends a random access signal to the network device to obtain the uplink TA (in this case, the sixth information may include the identity of the fourth serving cell), the terminal device may use the uplink TA of the fourth serving cell as the first An uplink TA of a serving cell, that is, the fourth serving cell shares an uplink TA with the first serving cell. Wherein, when the first serving cell and the fourth serving cell belong to cells managed by the same network device, the first serving cell and the fourth serving cell may share an uplink TA. The fourth serving cell may be an activated serving cell of the terminal device.

S504. The terminal device sends an uplink reference signal, such as an SRS, for measuring uplink channel information to the network device on the first serving cell; correspondingly, the network device may receive the uplink reference signal, and obtain uplink channel information according to the measurement of the uplink reference signal.

Exemplarily, the uplink channel information may include uplink channel quality information, and may also include other possible information, which is not specifically limited. After the network device obtains the uplink channel information through measurement, it can receive information from the terminal on the first serving cell. The uplink data of the device, therefore, the sign of activation of the first serving cell may be: uplink channel information obtained by network device measurement. That is to say, the uplink channel information may be used to indicate that the first serving cell has been activated.

Here, the resources used to bear the SRS may be referred to as SRS resources, and the SRS resources may be configured by the network device for the terminal device. There may be multiple ways in which the network device configures SRS resources for the terminal device. For example, mode 1: the network device may actively send fifth information to the terminal device, where the fifth information is used to indicate the SRS resource. In this case, the fifth information and the first information can be carried in the same message (such as the first message), or can also be carried in different messages, for example, the fifth information is carried in the fifth message, and the fifth message can be a message of the physical layer. message or MAC layer message or RRC message. Exemplarily, the SRS resource may be a periodic resource, or may also be an aperiodic resource, or may also be a semi-static resource.

Another example is mode 2: the terminal device sends a second request message to the network device, and the second request message is used to request SRS resources; correspondingly, after receiving the second request message, the network device may send fifth information to the terminal device. That is to say, the network device may send the fifth information to the terminal device based on the request of the terminal device. In this case, the fifth information and the first information may be carried in different messages, for example, the fifth information is carried in a fifth message. Exemplarily, the terminal device may send the second request message to the network device after performing downlink synchronization with the first service message. In this way, the network device can feed back the fifth information to the terminal device in real time based on the request of the terminal device, thus having higher flexibility; and the fifth information and the first information are carried in different messages, which can effectively save the activation of the first Resource occupancy in the first message when serving a cell.

As a possible implementation, the first request message and the second request message may be the same request message. In this case, the fourth message and the fifth message may be the same message, or may also be different messages.

It can be understood that: because the first serving cell does not include a downlink carrier, or the first serving cell includes a downlink carrier but has not activated a downlink carrier, therefore, the network device involved in the above steps sends downlink information to the terminal device (such as The first message, timing advance command, etc.), may refer to that the network device sends downlink information to the terminal device on other activated serving cells (the downlink carrier of the serving cell has been activated), and other activated serving cells may be terminal Primary cell or secondary cell of the device.

The step numbers in the flow chart described in Embodiment 1 are only an example of the execution flow, and do not constitute a restriction on the sequence of execution of the steps. In the embodiment of the present application, there is no strict sequence of steps between steps that are not dependent on each other. order of execution. The steps illustrated in the flow chart described in Embodiment 1 are not all steps that must be executed, and some steps can be deleted on the basis of each flow chart according to actual needs, or can also be added on the basis of each flow chart according to actual needs other possible steps. For example, in the flow chart described in Embodiment 1, after receiving the first message, the terminal device may also send feedback information to the network device.

Using the method in the first embodiment above, the network device can configure the first type of cell for the terminal device as the secondary cell (such as the first serving cell) of the terminal device. Since the first serving cell does not include a downlink carrier, the downlink frequency can be effectively saved. Domain resources, and meet the uplink transmission requirements of the terminal device; further, when the network device instructs the terminal device to activate the first serving cell, if the terminal device determines that the first serving cell belongs to the first type of cell, it does not need to be in the first serving cell Receiving the downlink reference signal does not need to report the CSI report to the network device, so that the power consumption of the terminal device can be effectively saved, and the delay in activating the secondary cell can be reduced. As shown in FIG. 6 or FIG. In the method, the time delay for activating the secondary cell includes T _HARQ and T _{activation_time} , but does not include T _{CSI_Reporting} . Alternatively, the network device may also configure a third type of cell for the terminal device as a secondary cell (such as the first serving cell) of the terminal device, but when activating the first serving cell, the downlink carrier of the first serving cell may not be activated, but only Activating the uplink carrier of the first serving cell, so that the network device does not need to send downlink signals on the first serving cell, effectively saving The power consumption of the network equipment is saved, and the terminal equipment does not need to receive the downlink reference signal in the first serving cell, and does not need to report the CSI report to the network equipment, thereby effectively saving the power consumption of the terminal equipment and reducing the delay of activating the secondary cell.

Embodiment two

FIG. 8 is a schematic flowchart corresponding to the communication method provided in Embodiment 2 of the present application. As shown in FIG. 8, the method includes:

S801. The network device sends a first message to the terminal device, where the first message includes first information, and the first information is used to indicate a first serving cell for activating the terminal device; correspondingly, the terminal device receives the first message.

Here, the first serving cell may be one of multiple secondary cells configured by the network device for the terminal device. The first serving cell may belong to the third type of cell, for example, the carriers of the first serving cell include uplink carrier 1 and downlink carrier 1 .

S802. The network device sends a downlink synchronization signal on the first serving cell; correspondingly, the terminal device receives the downlink synchronization signal from the network device on the first serving cell.

Here, since the first serving cell includes the downlink carrier 1, the network device may send the downlink synchronization signal on the downlink carrier 1 of the first serving cell. Exemplarily, if the network device determines that the terminal devices served by the first serving cell are all terminal devices that focus on uplink services, there is no need to send the downlink reference signal on the downlink carrier 1, so as to reduce the power consumption of the network device .

S803. The terminal device sends a random access signal to the network device on the first serving cell according to the downlink synchronization signal; correspondingly, the network device can receive the random access signal.

Here, the terminal device can perform downlink synchronization with the first serving cell according to the downlink synchronization signal. Further, after the terminal device determines that it is not necessary to activate the downlink carrier of the first serving cell, it does not need to receive the downlink reference signal in the first serving cell, nor does it need to Report the CSI report to the network device, but directly send a random access signal to the network device on the first serving cell.

Among them, there are many ways for the terminal device to determine that it is not necessary to activate the downlink carrier of the first serving cell, such as the implementation described in the first embodiment; Send a downlink synchronization signal, and then after the terminal device receives the downlink synchronization signal on the preset frequency domain resource of the first serving cell, it can determine not to activate the downlink carrier of the first serving cell; for another example, the network device is on the first serving cell The downlink synchronization signal is sent, but information such as MIB is not configured in the downlink synchronization signal, so that the terminal device detects that the MIB information is empty after receiving the downlink synchronization signal, and then it can determine not to activate the downlink carrier of the first serving cell.

In addition, in S803, after receiving the random access signal, the network device can obtain the uplink TA of the terminal device by measuring the random access signal, and send a timing advance command to the terminal device; furthermore, the terminal device can obtain the uplink TA according to the timing advance command. The TA implements uplink synchronization with the first serving cell.

S804, the terminal device sends an SRS to the network device on the first serving cell; correspondingly, the network device can receive the SRS, and obtain uplink channel information according to the SRS measurement.

The difference between Embodiment 2 and Embodiment 1 is: in Embodiment 1, the terminal device receives the downlink synchronization signal on the second serving cell that is synchronized with the first serving cell; while in Embodiment 2, the terminal device can receive the downlink synchronization signal on the first serving cell The downlink synchronization signal is received on the cell. For other contents except this difference, embodiment 2 may refer to embodiment 1.

By adopting the method in the second embodiment above, since the terminal device does not need to receive the downlink reference signal in the first serving cell, and does not need to report the CSI report to the network device, the power consumption of the terminal device can be effectively saved, and the time delay for activating the secondary cell can be reduced. Wherein, when the method in the above-mentioned embodiment 2 is adopted, the time delay for activating the secondary cell includes T _HARQ , T _{activation_time} , T _{CSI_Reporting} is no longer included.

The foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of communication device interaction. It can be understood that, in order to realize the above functions, the network device and the terminal device may include corresponding hardware structures and/or software modules for performing respective functions. Those skilled in the art should easily realize that the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

The embodiment of the present application may divide the network device and the terminal device into functional units according to the above method examples. For example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

In the case of using an integrated unit, FIG. 9 shows a possible exemplary block diagram of the device involved in the embodiment of the present application. As shown in FIG. 9 , an apparatus 900 may include: a processing unit 902 and a communication unit 903 . The processing unit 902 is used to control and manage the actions of the device 900 . The communication unit 903 is used to support the communication between the apparatus 900 and other devices. Optionally, the communication unit 903 is also referred to as a transceiver unit, and may include a receiving unit and/or a sending unit, configured to perform receiving and sending operations respectively. The device 900 may further include a storage unit 901 for storing program codes and/or data of the device 900 .

The apparatus 900 may be the terminal device in the foregoing embodiments. The processing unit 902 may support the apparatus 900 to execute the actions of the terminal device in the above method examples. Alternatively, the processing unit 902 mainly executes internal actions of the terminal device in the method example, and the communication unit 903 may support communication between the apparatus 900 and other devices.

For example, in one embodiment, the communication unit 903 is configured to: receive a first message from the network device, where the first message includes first information, and the first information is used to indicate a first serving cell for activating the terminal device; The first serving cell belongs to a first type of cell, and the carrier of the first type of cell is an uplink carrier; the second serving cell of the terminal device that is synchronized with the first serving cell receives information from the network device downlink synchronization signal, and perform downlink synchronization with the first serving cell according to the downlink synchronization signal; send an uplink reference signal to the network device on the first serving cell, and the uplink reference signal is used to measure uplink Channel information, where the uplink channel information is used to indicate that the first serving cell has been activated.

In a possible design, the communication unit 903 is further configured to: send capability information of the terminal device to the network device, where the capability information is used to indicate that the terminal device supports the first type of cell.

In a possible design, the communication unit 903 is further configured to: receive second information from the network device, where the second information is used to indicate that the second serving cell is synchronized with the first serving cell; wherein , the second information is carried in the first message, or the second information is carried in a second message.

In a possible design, the communication unit 903 is further configured to: receive third information from the network device, the The third information is used to indicate that the third serving cell is synchronized with the first serving cell; wherein, the third information is carried in the first message, or the third information is carried in a third message; when the When the third serving cell is not activated, the downlink synchronization signal from the network device is received on the second serving cell of the terminal device that is synchronized with the first serving cell.

In a possible design, the communication unit 903 is further configured to: send a random access signal to the network device on the first serving cell.

In a possible design, the random access signal includes a preamble for non-contention random access; the communication unit 903 is further configured to: send a first request message to the network device, and the first request message It is used to request the preamble; receiving fourth information from the network device, the fourth information is used to indicate the preamble, and the fourth information is carried in a fourth message.

The apparatus 900 may be the access network device in the foregoing embodiments. The processing unit 902 may support the apparatus 900 to execute the actions of the access network device in the above method examples. Alternatively, the processing unit 902 mainly executes internal actions of the access network device in the method example, and the communication unit 903 may support communication between the apparatus 900 and other devices.

For example, in one embodiment, the communication unit 903 is further configured to: send a first message to the terminal device, where the first message includes first information, and the first information is used to indicate to activate the first service of the terminal device Cell; the first serving cell belongs to a first type of cell, and the carrier of the first type of cell is an uplink carrier; a downlink synchronization signal is sent on a second serving cell of the terminal device synchronized with the first serving cell , the downlink synchronization signal is used for the terminal device to perform downlink synchronization with the first serving cell; an uplink reference signal from the terminal device is received on the first serving cell, and measured according to the uplink reference signal Obtain uplink channel information, where the uplink channel information is used to indicate that the first serving cell has been activated.

In a possible design, the communication unit 903 is further configured to: receive capability information from the terminal device, where the capability information is used to indicate that the terminal device supports the first type of cell.

In a possible design, the communication unit 903 is further configured to: send second information to the terminal device, where the second information is used to indicate that the second serving cell is synchronized with the first serving cell; wherein, The second information is carried in the first message, or the second information is carried in a second message.

In a possible design, the communication unit 903 is further configured to: send third information to the terminal device, where the third information is used to indicate that a third serving cell is synchronized with the first serving cell; wherein, the The third information is carried in the first message, or the third information is carried in a third message.

In a possible design, the communication unit 903 is further configured to: receive a random access signal from the terminal device on the first serving cell.

In a possible design, the random access signal includes a preamble for non-contention random access; the communication unit 903 is further configured to: receive a first request message from the terminal device, the first request The message is used to request the preamble; and fourth information is sent to the terminal device, the fourth information is used to indicate the preamble, and the fourth information is carried in the fourth message.

It should be understood that the division of units in the above device is only a division of logical functions, and may be fully or partially integrated into a physical entity or physically separated during actual implementation. And the units in the device can all be implemented in the form of software called by the processing element; they can also be implemented in the form of hardware; some units can also be implemented in the form of software called by the processing element, and some units can be implemented in the form of hardware. For example, each unit can be a separate processing element, or it can be integrated in a certain chip of the device. In addition, it can also be stored in the memory in the form of a program, which is called and executed by a certain processing element of the device. Function. In addition, all or part of these units can be integrated together, or implemented independently. The processing element mentioned here may also be a processor, which may be an integrated circuit with signal processing capability. In the implementation process, each operation of the above method or each unit above may be realized by an integrated logic circuit of hardware in the processor element, or implemented in the form of software called by the processing element.

In one example, the units in any of the above devices may be one or more integrated circuits configured to implement the above method, for example: one or more specific integrated circuits (application specific integrated circuit, ASIC), or, one or Multiple microprocessors (digital signal processor, DSP), or, one or more field programmable gate arrays (field programmable gate array, FPGA), or a combination of at least two of these integrated circuit forms. For another example, when the units in the device can be implemented in the form of a processing element scheduler, the processing element can be a processor, such as a general-purpose central processing unit (central processing unit, CPU), or other processors that can call programs. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

The above unit for receiving is an interface circuit of the device for receiving signals from other devices. For example, when the device is implemented as a chip, the receiving unit is an interface circuit for the chip to receive signals from other chips or devices. The above sending unit is an interface circuit of the device, and is used to send signals to other devices. For example, when the device is implemented as a chip, the sending unit is an interface circuit used by the chip to send signals to other chips or devices.

Referring to FIG. 10 , it is a schematic structural diagram of an access network device provided in an embodiment of the present application. The access network device (or base station) can be applied to the communication system shown in FIG. 1 . The function of the connected device. As shown in FIG. 10, an access network device 100 may include one or more DUs 1001 and one or more CUs 1002. The DU 1001 may include at least one antenna 10011, at least one radio frequency unit 10012, at least one processor 10013 and at least one memory 10014. The DU 1001 part is mainly used for transmitting and receiving radio frequency signals, conversion of radio frequency signals and baseband signals, and part of baseband processing. The CU 1002 may include at least one processor 10022 and at least one memory 10021 .

The CU 1002 is mainly used for baseband processing, controlling access network equipment, and the like. The DU 1001 and the CU 1002 may be physically set together, or physically separated, that is, a distributed base station. The CU 1002 is the control center of the access network equipment, and can also be called a processing unit, which is mainly used to complete the baseband processing function. For example, the CU 1002 may be used to control the access network device to execute the operation procedures related to the access network device in the foregoing method embodiments.

In addition, optionally, the access network device 100 may include one or more radio frequency units, one or more DUs, and one or more CUs. Wherein, the DU may include at least one processor 10013 and at least one memory 10014, the radio frequency unit may include at least one antenna 10011 and at least one radio frequency unit 10012, and the CU may include at least one processing 10022 and at least one memory 10021.

In one example, the CU1002 can be composed of one or more single boards, and multiple single boards can jointly support a wireless access network (such as a 5G network) with a single access indication, or can separately support wireless access networks of different access standards. Access network (such as LTE network, 5G network or other networks). The memory 10021 and the processor 10022 may serve one or more single boards. That is to say, memory and processors can be set independently on each single board. It may also be that multiple single boards share the same memory and processor. In addition, necessary circuits can also be set on each single board. The DU1001 can be composed of one or more single boards, and multiple single boards can jointly support a wireless access network (such as a 5G network) with a single access indication, or can separately support wireless access networks of different access standards (such as a 5G network). LTE network, 5G network or other networks). The memory 10014 and the processor 10013 may serve one or more single boards. That is to say, memory and processors can be set independently on each single board. It may also be that multiple single boards share the same memory and processor. In addition, necessary circuits can also be set on each single board.

The access network device shown in FIG. 10 can implement various processes related to the access network device in the foregoing method embodiments. The operations and/or functions of the various modules in the access network device shown in FIG. 10 are respectively intended to implement the corresponding processes in the foregoing method embodiments. For details, reference may be made to the descriptions in the foregoing method embodiments, and detailed descriptions are appropriately omitted here to avoid repetition.

Referring to FIG. 11 , it is a schematic structural diagram of a terminal device provided by an embodiment of the present application. The terminal device can be applied to the communication system shown in FIG. 1 to realize the operation of the terminal device in the above embodiments. As shown in FIG. 11 , the terminal device includes: an antenna 1110 , a radio frequency part 1120 , and a signal processing part 1130 . The antenna 1110 is connected to the radio frequency part 1120 . In the downlink direction, the radio frequency part 1120 receives the information sent by the network equipment through the antenna 1110, and sends the information sent by the network equipment to the signal processing part 1130 for processing. In the uplink direction, the signal processing part 1130 processes the information of the terminal device and sends it to the radio frequency part 1120 , and the radio frequency part 1120 processes the information of the terminal device and sends it to the network device through the antenna 1110 .

The signal processing part 1130 may include a modulation and demodulation subsystem, which is used to realize the processing of each communication protocol layer of data; it may also include a central processing subsystem, which is used to realize the processing of the operating system and application layer of the terminal equipment; Including other subsystems, such as multimedia subsystems, peripheral subsystems, etc., wherein the multimedia subsystem is used to realize the control of the terminal equipment camera, screen display, etc., and the peripheral subsystem is used to realize the connection with other devices. The modem subsystem can be a separate chip.

The modem subsystem may include one or more processing elements 1131, including, for example, a master CPU and other integrated circuits. In addition, the modem subsystem may further include a storage element 1132 and an interface circuit 1133 . The storage element 1132 is used to store data and programs, but the program used to execute the method executed by the terminal device in the above methods may not be stored in the storage element 1132, but stored in a memory outside the modem subsystem, When used, the modem subsystem is loaded and used. Interface circuit 1133 is used to communicate with other subsystems.

The modem subsystem can be realized by a chip, and the chip includes at least one processing element and an interface circuit, wherein the processing element is used to execute each step of any method performed by the terminal device above, and the interface circuit is used to communicate with other devices. In one implementation, the unit for the terminal device to implement each step in the above method may be implemented in the form of a processing element scheduler. For example, the device for the terminal device includes a processing element and a storage element, and the processing element calls the program stored in the storage element to Execute the method performed by the terminal device in the above method embodiment. The storage element may be a storage element on the same chip as the processing element, that is, an on-chip storage element.

In another implementation, the program for executing the method executed by the terminal device in the above method may be stored in a storage element on a different chip from the processing element, that is, an off-chip storage element. At this time, the processing element invokes or loads a program from the off-chip storage element on the on-chip storage element, so as to invoke and execute the method performed by the terminal device in the above method embodiments.

In yet another implementation, the unit of the terminal device implementing each step in the above method may be configured as one or more processing elements, these processing elements are set on the modem subsystem, and the processing elements here can be integrated circuits, for example: one or more ASICs, or, one or more DSPs, or, one or more FPGAs, or Combinations of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.

The units of the terminal device for implementing each step in the above method can be integrated together and implemented in the form of an SOC, and the SOC chip is used to implement the above method. The chip may integrate at least one processing element and a storage element, and the processing element calls the stored program of the storage element to realize the method executed by the above terminal device; or, the chip may integrate at least one integrated circuit for realizing the above terminal The method executed by the device; or, the above implementation manners may be combined, the functions of some units are implemented in the form of calling programs by processing elements, and the functions of some units are implemented in the form of integrated circuits.

It can be seen that the above apparatus for a terminal device may include at least one processing element and an interface circuit, where at least one processing element is configured to execute any method performed by the terminal device provided in the above method embodiments. The processing element can perform some or all of the steps performed by the terminal device in the first way: that is, by calling the program stored in the storage element; or in the second way: through the integrated logic circuit of the hardware in the processor element combined with instructions Part or all of the steps performed by the terminal device may be performed in a manner; of course, some or all of the steps performed by the terminal device may also be performed in combination with the first method and the second method.

The processing elements here are the same as those described above, and may be implemented by a processor, and the functions of the processing elements may be the same as those of the processing unit described in FIG. 9 . Exemplarily, the processing element may be a general-purpose processor, such as a CPU, and may also be one or more integrated circuits configured to implement the above method, such as: one or more ASICs, or, one or more microprocessors DSP , or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms. The storage element may be implemented by a memory, and the function of the storage element may be the same as that of the storage unit described in FIG. 9 . A storage element may be one memory, or a general term for multiple memories.

The terminal device shown in FIG. 11 can implement various processes related to the terminal device in the foregoing method embodiments. The operations and/or functions of the various modules in the terminal device shown in FIG. 11 are respectively for implementing the corresponding processes in the foregoing method embodiments. For details, reference may be made to the descriptions in the foregoing method embodiments, and detailed descriptions are appropriately omitted here to avoid repetition.

The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or" describes the association relationship of associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the contextual objects are an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example "at least one of A, B and C" includes A, B, C, AB, AC, BC or ABC. And, unless otherwise specified, ordinal numerals such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects degree.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer programs are available Cause the processor of a general-purpose computer, special-purpose computer, embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device are used to implement the process in the flow chart A procedure or procedures and/or an arrangement of functions specified in one or more blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

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

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A communication method, characterized in that the method comprises:

receiving a first message from a network device, where the first message includes first information, and the first information is used to indicate a first serving cell for activating the terminal device; the first serving cell belongs to a first type of cell, and the The carrier of the first type of cell is an uplink carrier;

receiving a downlink synchronization signal from the network device on a second serving cell of the terminal device synchronized with the first serving cell, and performing downlink synchronization with the first serving cell according to the downlink synchronization signal;

Send an uplink reference signal to the network device on the first serving cell, where the uplink reference signal is used to measure uplink channel information, and the uplink channel information is used to indicate that the first serving cell has been activated.
The method according to claim 1, further comprising:

sending capability information of the terminal device to the network device, where the capability information is used to indicate that the terminal device supports the first type of cell.
The method according to claim 1 or 2, wherein the synchronization between the first serving cell and the second serving cell comprises at least one of the following:

The frequency domain separation between the uplink carrier of the first serving cell and the uplink carrier of the second serving cell is less than or equal to a first threshold;

The uplink carrier of the first serving cell and the uplink carrier of the second serving cell are located in the same frequency band;

The frequency domain separation between the uplink carrier of the first serving cell and the downlink carrier of the second serving cell is less than or equal to a second threshold;

The uplink carrier of the first serving cell and the downlink carrier of the second serving cell are located in the same frequency band.
The method according to any one of claims 1 to 3, wherein the method further comprises:

receiving second information from the network device, where the second information is used to indicate that the second serving cell is synchronized with the first serving cell; where the second information is carried in the first message, or The second information is carried in a second message.
The method according to any one of claims 1 to 3, characterized in that receiving a downlink synchronization signal from the network device on a second serving cell of the terminal device synchronized with the first serving cell, include:

receiving third information from the network device, where the third information is used to indicate that a third serving cell is synchronized with the first serving cell; where the third information is carried in the first message, or the the third information is carried in the third message;

When the third serving cell is not activated, receiving a downlink synchronization signal from the network device on a second serving cell of the terminal device that is synchronized with the first serving cell.
The method according to any one of claims 1 to 5, wherein the method further comprises:

Sending a random access signal to the network device on the first serving cell.
The method according to claim 6, wherein the random access signal includes a preamble for non-contention random access; the first message further includes fourth information, and the fourth information is used to indicate the preamble.
The method according to claim 6, wherein the random access signal comprises a preamble for non-contention random access;

The method also includes:

sending a first request message to the network device, where the first request message is used to request the preamble;

Receive fourth information from the network device, where the fourth information is used to indicate the preamble, and the fourth information is carried in a fourth message.
A communication method, characterized in that the method comprises:

sending a first message to the terminal device, where the first message includes first information, and the first information is used to indicate activation of a first serving cell of the terminal device; the first serving cell belongs to a first type of cell, so The carrier of the first type of cell is an uplink carrier;

sending a downlink synchronization signal on a second serving cell of the terminal device synchronized with the first serving cell, where the downlink synchronization signal is used for downlink synchronization between the terminal device and the first serving cell;

receiving an uplink reference signal from the terminal device on the first serving cell, and measuring and obtaining uplink channel information according to the uplink reference signal, where the uplink channel information is used to indicate that the first serving cell has been activated.
The method according to claim 9, characterized in that the method further comprises:

Receive capability information from the terminal device, where the capability information is used to indicate that the terminal device supports the first type of cell.
The method according to claim 9 or 10, wherein the synchronization between the first serving cell and the second serving cell comprises at least one of the following:

The frequency domain separation between the uplink carrier of the first serving cell and the uplink carrier of the second serving cell is less than or equal to a first threshold;

The uplink carrier of the first serving cell and the uplink carrier of the second serving cell are located in the same frequency band;

The frequency domain separation between the uplink carrier of the first serving cell and the downlink carrier of the second serving cell is less than or equal to a second threshold;

The uplink carrier of the first serving cell and the downlink carrier of the second serving cell are located in the same frequency band.
The method according to any one of claims 9 to 11, further comprising:

sending second information to the terminal device, where the second information is used to indicate that the second serving cell is synchronized with the first serving cell; where the second information is carried in the first message, or the The second information is carried in the second message.
The method according to any one of claims 9 to 11, further comprising:

sending third information to the terminal device, where the third information is used to indicate that a third serving cell is synchronized with the first serving cell; where the third information is carried in the first message, or the first The third information is carried in the third message.
The method according to any one of claims 9 to 13, further comprising:

receiving a random access signal from the terminal device on the first serving cell.
The method according to claim 14, wherein the random access signal includes a preamble for non-contention random access; the first message further includes fourth information, and the fourth information is used to indicate the preamble.
The method according to claim 14, wherein the random access signal comprises a preamble for non-contention random access;

The method also includes:

receiving a first request message from the terminal device, where the first request message is used to request the preamble;

Send fourth information to the terminal device, where the fourth information is used to indicate the preamble, and the fourth information is carried in a fourth message.
A communication device, characterized by comprising a module for performing the method according to any one of claims 1-8.
A communication device, characterized by comprising a module for performing the method according to any one of claims 9 to 16.
A communication device, characterized in that it includes a processor, the processor is coupled to a memory, and a computer program is stored in the memory; the processor is used to call the computer program in the memory, so that the communication device executes A method as claimed in any one of claims 1 to 8.
A communication device, characterized in that it includes a processor, the processor is coupled to a memory, and a computer program is stored in the memory; the processor is used to call the computer program in the memory, so that the communication device executes A method as claimed in any one of claims 9 to 16.
A communication device, characterized in that it includes a processor and an interface circuit, the interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or transmit signals from the processor The signal is sent to other communication devices other than the communication device, and the processor implements the method according to any one of claims 1 to 8 through a logic circuit or executing code instructions.
A communication device, characterized in that it includes a processor and an interface circuit, the interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or transmit signals from the processor The signal is sent to other communication devices other than the communication device, and the processor implements the method according to any one of claims 9 to 16 through a logic circuit or executing code instructions.
A communication system, characterized in that the communication system comprises the communication device as claimed in claim 17, 19 or 21 and the communication device as claimed in claim 18, 20 or 22.
A computer-readable storage medium, characterized in that computer programs or instructions are stored in the storage medium, and when the computer programs or instructions are executed by a computer, the method according to any one of claims 1 to 16 is realized .
A computer program product, characterized in that when the computer reads and executes the computer program product, the computer is made to perform the method according to any one of claims 1 to 16.