WO2019192458A1

WO2019192458A1 - Communication method and apparatus

Info

Publication number: WO2019192458A1
Application number: PCT/CN2019/080958
Authority: WO
Inventors: 胡星星; 张宏平; 曾清海
Original assignee: 华为技术有限公司
Priority date: 2018-04-04
Filing date: 2019-04-02
Publication date: 2019-10-10
Also published as: CN110351895B; CN110351895A

Abstract

Embodiments of the present application provide a communication method and apparatus. The method comprises: acquiring a number of retransmissions of a first data packet, wherein the first data packet is an RLC data unit; and if the number of retransmissions of the first data packet is greater than or equal to a maximum number of retransmissions, determining, according to a first logical channel, whether an RRC connection reestablishment condition is met, wherein the first logical channel is a logical channel carrying the first data packet. When the number of retransmissions of a first data packet is greater than or equal to a maximum number of retransmissions, a terminal can further determine whether to request an RRC connection reestablishment to a network device according to whether a first logical channel meets an RRC connection reestablishment condition. In this way the terminal is prevented from requesting an RRC connection reestablishment to the network device once the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, reducing the number of times an RRC connection has to be reestablished, and reducing the number and durations of interruptions of a service of the terminal, improving communication quality.

Description

Communication method and device

The present application claims priority to Chinese Patent Application Serial No. 20 181 029 987, filed on Apr. 4, s.

Technical field

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

Background technique

With the development of communication technologies, more and more terminals need to access the wireless network, and more and more services require high rate guarantee, so the network needs higher throughput. Since the wireless bandwidth of the high frequency band is rich, it is possible to transmit the service in the radio resources of the high frequency band to meet the above requirements. However, the wireless transmission characteristics of the high frequency band have their limitations, and the attenuation is fast, so the transmission range is relatively small. In addition, the high-frequency transmission signal is relatively fragile, so it is easy to cause signal quality degradation, which may cause wireless link failure (Radio link Failure). , RLF).

The terminal in the connected state monitors the quality of the radio link. In a possible scenario, if the number of retransmissions of the data packet in a radio bearer indicated by the radio link control (RLC) reaches the maximum number of retransmissions Then, the terminal detects the RLF. After the terminal detects the RLF, the terminal remains in the radio resource control (RRC) connection state, and the terminal selects the cell to request the RRC connection reestablishment. After the RRC connection is successfully reestablished, the terminal can perform data transmission, but the RRC connection is reestablished. The process takes a long time, which may cause the service to be interrupted for a long time and affect the communication quality.

Summary of the invention

The embodiment of the present application provides a communication method and device, which are used to reduce the number of RRC connection reestablishments, to reduce the number and time of service interruption status, and improve communication quality.

In a first aspect, the embodiment of the present application provides a communication method, including: first acquiring a retransmission number of a first data packet, where the first data packet is an RLC data unit; and then retransmitting the first data packet When it is greater than or equal to the maximum number of retransmissions, it is determined whether the RRC connection reestablishment condition is met according to the first logical channel, where the first logical channel is a logical channel carrying the first data packet.

Therefore, when the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, whether to request the RRC connection reestablishment to the network device is further determined according to whether the first logical channel satisfies the RRC connection reestablishment condition. It is avoided that the terminal requests the RRC connection reestablishment to the network device once the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, reduces the number of RRC connection reestablishments, thereby reducing the number and time of the terminal's service interruption state, and improving communication. quality.

In a possible design, the method further includes requesting, by the network device, an RRC connection reestablishment when it is determined that the RRC connection reestablishment condition is met. Therefore, when the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, and the RRC connection reestablishment condition is determined according to the first logical channel, the RRC connection reestablishment is requested to the network device, and the number of RRC connection reestablishments is reduced.

In a possible design, the method further includes: when determining that the RRC connection reestablishment condition is not met, sending a first message to the network device, where the first message includes indicating that the first logical channel is wireless Link failure information. Therefore, the first logical channel radio link failure is reported to the network device by using the first message, so that the network device reconfigures the first logical channel, so that the reconfigured logical channel can meet the service quality.

In one possible design, the first message includes an identification of the first logical channel.

In a possible design, the determining, according to the first logical channel, whether the RRC connection reestablishment condition is met includes:

If the first serving cell includes the primary serving cell of the terminal, determining that the RRC connection reestablishment condition is met, and/or, if the first serving cell includes the primary serving cell of the terminal, and determining that there is no Other serving cells outside a serving cell may be used to carry an RRC message, and determine that the RRC connection reestablishment condition is satisfied.

The first serving cell is a serving cell of the terminal that satisfies the mapping rule of the first logical channel.

Therefore, if the first serving cell that satisfies the mapping rule of the first logical channel includes the primary serving cell of the terminal, or if the first serving cell includes the primary serving cell of the terminal and determines that there is no The other serving cell outside the serving cell may be used to carry the RRC message, indicating that the primary serving cell of the terminal cannot meet the service quality requirement, and the RRC connection reestablishment needs to be initiated to ensure the communication quality.

In a possible design, the method further includes: determining that the RRC connection reestablishment condition is not satisfied if the primary serving cell of the terminal is not included in the first serving cell;

Or if the first serving cell includes the primary serving cell of the terminal and determines that another serving cell other than the first serving cell is available to carry the RRC message, determining that the RRC connection reestablishment condition is not met.

Therefore, if the first serving cell that satisfies the mapping rule of the first logical channel does not include the primary serving cell of the terminal, or if the first serving cell includes the primary serving cell of the terminal and determines that there is a The other serving cell outside the serving cell can be used to carry the RRC message, indicating that the RRC connection re-establishment is not required, and the number and time of the service interruption of the terminal are reduced, and the communication quality is guaranteed.

If the first logical channel belongs to a preset logical channel that needs to trigger RRC connection reestablishment, it is determined that the RRC connection reestablishment condition is satisfied.

Therefore, if the first logical channel belongs to a preset logical channel that needs to trigger RRC connection reestablishment, it is required to request an RRC connection to reestablish you to ensure communication quality.

In a possible design, the method further includes determining that the RRC connection reestablishment condition is not satisfied if the first logical channel does not belong to a preset logical channel that needs to trigger an RRC connection reestablishment.

Therefore, if the first logical channel does not belong to the preset logical channel that needs to trigger the RRC connection reestablishment, it indicates that the RRC connection reestablishment is not required, and the RRC reestablishment is not requested from the network device, and the RRC reestablishment times are reduced.

In a possible design, the method further comprises receiving a second message from the network device, the second message including information indicating a preset logical channel that needs to trigger an RRC connection re-establishment.

In a possible design, the information used to indicate a preset logical channel that needs to trigger an RRC connection reestablishment includes an identifier of the preset logical channel. or,

The information indicating the preset logical channel that needs to trigger the RRC connection reestablishment includes an identifier of the at least one cell, and the at least one serving cell corresponding to the preset logical channel includes the at least one cell. or,

The information indicating the preset logical channel that needs to trigger the RRC connection reestablishment includes an identifier of the at least one radio data bearer, where the preset logical channel includes a logical channel corresponding to the at least one radio data bearer. or,

The information for indicating a preset logical channel that needs to trigger an RRC connection reestablishment includes at least one partial carrier bandwidth, where the preset logical channel includes a logical channel carried by the at least one partial carrier bandwidth.

In a second aspect, the embodiment of the present application provides a communication method, including: when a number of retransmissions of a first data packet is greater than or equal to a maximum number of retransmissions, and the RRC connection reestablishment condition is met, receiving, from the terminal, requesting RRC connection reestablishment Message. Therefore, it is avoided that the RRC connection reestablishment is received from the terminal once the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, thereby reducing the number of RRC connection reestablishments, thereby reducing the number and time of interruption of the service of the terminal, and improving communication. quality. or,

Receiving, by the terminal, the first message, where the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, and the RRC connection reestablishment condition is not met, where the first message includes Road failure information.

Whether the RRC connection reestablishment condition is satisfied is determined according to the first logical channel, the first logical channel is a logical channel carrying the first data packet, and the first data packet is a data unit of the RLC.

Therefore, when the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, and the RRC connection reestablishment condition is not met, the first message determines that the first logical channel radio link fails, so that the network device reconfigures the first logic. The channel enables the reconfigured logical channel to meet the quality of service.

In a possible design, the satisfying the RRC connection reestablishment condition includes:

If the primary serving cell of the terminal is included in the first serving cell, the RRC connection reestablishment condition is met, and/or, if the first serving cell includes the primary serving cell of the terminal, and it is determined that there is no The other serving cell except the first serving cell may be used to carry the RRC message, and the RRC connection reestablishment condition is satisfied.

In a possible design, the not satisfying the RRC connection reestablishment condition includes:

If the primary serving cell of the terminal is not included in the first serving cell, the RRC connection reestablishment condition is not met; or if the first serving cell includes the primary serving cell of the terminal and is determined to be present The other serving cell except the first serving cell may be used to carry the RRC message, and the RRC connection reestablishment condition is not satisfied.

In a possible design, the satisfying the RRC connection reestablishment condition includes: the first logical channel belongs to a preset logical channel that needs to trigger an RRC connection reestablishment.

In a possible design, the not satisfying the RRC connection reestablishment condition includes: if the first logical channel does not belong to a preset logical channel that needs to trigger an RRC connection reestablishment, the RRC connection reestablishment condition is not satisfied.

Therefore, if the first logical channel does not belong to a preset logical channel that needs to trigger RRC connection reestablishment, it indicates that RRC connection re-establishment is not required to reduce the number of RRC re-establishments.

In a possible design, the method further includes: sending a second message to the terminal, where the second message includes information indicating a preset logical channel that needs to trigger an RRC connection reestablishment.

The information for indicating a preset logical channel that needs to trigger an RRC connection reestablishment includes an identifier of at least one cell, where the preset logical channel includes a logical channel in the at least one cell. or,

In a third aspect, the embodiment of the present application provides a communication method, including: acquiring a number of retransmissions of a first data packet, where the first data packet is a data unit of an RLC; and then retransmitting the number of the first data packet And the third message is sent to the network device, where the third message includes information indicating that the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to the preset number of times. The first logical channel is a logical channel carrying the first data packet.

The preset number of times is less than the maximum number of retransmissions. When the number of retransmissions of the first data packet is greater than or equal to the preset number of times, the network device reports the network device, so that the network device can perform corresponding operations to avoid retransmission of the first data packet. The number of times continues to increase to be greater than or equal to the maximum number of retransmissions, thereby ensuring the quality of service carried on the first logical channel, thereby reducing the number of RRC connection reestablishments, reducing the number and time of interruption of the service of the terminal, and improving communication quality.

In a possible design, the third message further includes an identifier of the first logical channel.

In a possible design, the third message is carried in a Protocol Data Unit (PDU), and the third message includes information for indicating that the PDU is a retransmission number control PDU. The retransmission number control PDU is used to indicate that the number of retransmissions of the first data packet carried by the first logical channel is greater than or equal to the preset number of times. Therefore, the number of retransmissions of the first data packet can be reported to the network device by the PDU to be greater than or equal to the preset number of times, so that the network device can perform corresponding operations to prevent the number of retransmissions of the first data packet from continuing to increase to be greater than or equal to the maximum. The number of retransmissions.

In a possible design, the sending the third message to the network device comprises: sending the third message to the network device by using the first logical channel. Therefore, the number of retransmissions of the first data packet carried on the first logical channel is reported to be greater than or equal to the preset number of times by the network device by sending the first logical channel of the third message.

In a possible design, after the sending the third message to the network device, the method further includes: starting a timer; and then prohibiting the third message from being sent to the network device again before the timer expires. Therefore, it is possible to prevent the third message from being sent to the network device multiple times before the number of retransmissions of the first data packet is greater than or equal to the preset number of times and less than the maximum number of retransmissions.

In one possible design, the method further comprises receiving information of the timer from the network device.

In a possible design, when the number of retransmissions of the first data packet is greater than or equal to a preset number of times, sending the third message to the network device includes:

And when the number of retransmissions of the first data packet is greater than or equal to a preset number of times, and the retransmission number reporting period arrives, sending the third message to the network device.

In a possible design, the method further includes: receiving information of the retransmission number reporting period from the network device.

In a possible design, the method further includes: receiving, by the network device, first information, where the first information is used to indicate that the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to a pre- The network device is notified when the number of times is set. Therefore, the terminal can make the terminal flexibly execute the solution of the embodiment by using the first information.

In one possible design, the method further includes receiving, from the network device, information indicating the preset number of times.

In a fourth aspect, the embodiment of the present application provides a communication method, including: receiving a third message from a terminal, where the third message includes a retransmission number indicating that a data packet carried by the first logical channel is greater than or equal to a pre- The information of the number of times, the data packet is a data unit of the RLC; and then determining, according to the third message, that the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to the preset number of times.

The preset number of times is less than the maximum number of retransmissions. If the network device receives the first message and determines that the number of retransmissions of the first data packet is greater than or equal to the preset number of times according to the first message, the corresponding operation may be performed to avoid the first The number of retransmissions of the data packet is increased to be greater than or equal to the maximum number of retransmissions, thereby ensuring the quality of the service carried on the first logical channel, thereby reducing the number of RRC connection reestablishments and reducing the number and time of interruption of the service of the terminal. Communication quality.

In a possible design, the third message is carried in a PDU, where the third message includes information indicating that the PDU is a retransmission number control PDU, and the retransmission number control PDU is used to indicate The number of retransmissions of the data packet carried by the first logical channel is greater than or equal to the preset number of times. Therefore, the number of retransmissions of the first data packet reported by the terminal is greater than or equal to the preset number of times, so that the network device can perform corresponding operations to prevent the number of retransmissions of the first data packet from continuing to increase to be greater than or equal to the maximum. The number of retransmissions.

In a possible design, the receiving, by the terminal, the third message comprises: receiving, by the first logical channel, the third message from a terminal. Therefore, the network device determines, according to the first logical channel that receives the third message, that the number of retransmissions of the first data packet carried on the first logical channel is greater than or equal to a preset number of times.

In a possible design, the method further includes: sending, to the terminal, information of a timer, where the timer is configured to prohibit the terminal from sending the third message to the network device again before the timer expires. . Therefore, it is possible to prevent the third message from being sent to the network device multiple times before the number of retransmissions of the first data packet is greater than or equal to the preset number of times and less than the maximum number of retransmissions.

In a possible design, the method further includes: sending, to the terminal, information of a retransmission number reporting period, where the retransmission number reporting period is used by the terminal to send when the retransmission number reporting period arrives The third message.

In a possible design, the method further includes: sending, to the terminal, first information, where the first information is used to indicate that the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to a preset. The network device is notified when the number of times. Therefore, the terminal can flexibly configure the terminal to perform the solution of the embodiment.

In a possible design, the method further includes: sending, to the terminal, information indicating the preset number of times.

In a fifth aspect, an embodiment of the present application provides a communications apparatus, including:

Included are modules, components or circuits for implementing the communication method of the first aspect; or

A module, component or circuit for implementing the communication method of the second aspect; or

A module, component or circuit for implementing the communication method of the third aspect; or

A module, component or circuit for implementing the communication method of the fourth aspect is included.

In a sixth aspect, the embodiment of the present application provides a communication apparatus, including: a processor, where the processor is configured to perform the communication method according to any one of the embodiments of the present application.

In a possible manner, the communication device of the foregoing sixth aspect may further include a transceiver for implementing a corresponding transceiving operation.

In a seventh aspect, the embodiment of the present application provides a communication device, including: a transceiver; the transceiver is configured to perform the communication method according to any one of the embodiments of the present application.

In a possible manner, the communication device of the above seventh aspect may further comprise a processor for implementing a corresponding processing or control operation.

In an eighth aspect, the embodiment of the present application provides a communication apparatus, including: a processor and a transceiver; and a processor and a transceiver, for performing the communication method according to any one of the third aspect or the fourth aspect of the present application.

In a ninth aspect, the embodiment of the present application provides a chip, including: a memory and a processor, where the memory is used to store program instructions, and the processor is configured to call the program instructions in the memory to perform the first aspect or the second aspect or the third aspect or the The communication method described in the fourth embodiment of the present application.

In a tenth aspect, the embodiment of the present application provides a readable storage medium, where the readable storage medium stores a computer program; when the computer program is executed, implementing the first aspect or the second aspect or the third aspect or The communication method described in the fourth embodiment of the present application.

In an eleventh aspect, an embodiment of the present application provides a program product, where the program product includes a computer program, where the computer program is stored in a readable storage medium, and at least one processor of the communication device can be from the readable storage medium The computer program is read, and the at least one processor executes the computer program such that the communication device implements the communication method of any of the first aspect or the second aspect or the third aspect or the fourth aspect of the present application.

DRAWINGS

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

FIG. 1b is a schematic diagram of a protocol stack of a network device according to an embodiment of the present disclosure;

2 is a flowchart of a communication method according to an embodiment of the present application;

FIG. 3 is a flowchart of a communication method according to another embodiment of the present application;

4 is a flowchart of a communication method according to another embodiment of the present application;

FIG. 5 is a schematic structural diagram of a communication apparatus according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a communication apparatus according to another embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a communication device according to another embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a communication apparatus according to another embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a communication apparatus according to another embodiment of the present disclosure.

detailed description

FIG. 1a is a schematic diagram of a communication system according to an embodiment of the present disclosure. As shown in FIG. 1a, the communication system includes a network device and a terminal.

In the following, some of the terms in this application are explained so as to be understood by those skilled in the art:

A network device, also known as a radio access network (RAN) device, is a device that accesses a terminal to a wireless network, and may be an evolved base station in Long Term Evolution (LTE) (Evolutional Node B, eNB or eNodeB), or a relay station or an access point, or a base station in a 5G network, such as a Transmission and Reception Point (TRP), a controller, is not limited herein. In a possible manner, the access network device may be a base station (such as a gNB) of a CU and a DU separation architecture, as shown in FIG. 1b. FIG. 1b is a schematic diagram of a protocol stack of a network device according to an embodiment of the present application. The RAN device can be connected to the core network device (for example, it can be the core network of LTE, or the core network of 5G, etc.). CU and DU can be understood as the division of the base station from the perspective of logical functions. The CU and DU can be physically separated or deployed together. Multiple DUs can share one CU. A DU can also be connected to multiple CUs (not shown). The CU and the DU can be connected through an interface, for example, an F1 interface. The CU and DU can be divided according to the protocol layer of the wireless network. For example, the functions of the Radio Resource Control (RRC), the Service Data Adaptation Protocol (SDAP), and the Packet Data Convergence Protocol (PDCP) layer are set in the CU, and the wireless chain The functions of the radio link control (RLC), the media access control (MAC) layer, and the physical (PHY) layer are set in the DU. It can be understood that the division of the CU and DU processing functions according to this protocol layer is merely an example, and may be divided in other manners. For example, a CU or a DU can be divided into functions having more protocol layers. For example, a CU or a DU can also be divided into partial processing functions with a protocol layer. In one design, some functions of the RLC layer and functions of the protocol layer above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layer below the RLC layer are set in the DU. In another design, the functions of the CU or DU can also be divided according to the type of service or other system requirements. For example, according to the delay division, the function that needs to meet the delay requirement in the processing time is set in the DU, and the function that does not need to meet the delay requirement is set in the CU. In another design, the CU may also have one or more functions of the core network. One or more CUs can be set centrally and also separated. For example, the CU can be set to facilitate centralized management on the network side. The DU can have multiple RF functions or remotely set the RF function.

The functions of the CU can be implemented by one entity or by different entities. For example, the function of the CU can be further divided, for example, the control plane (CP) and the user plane (UP) are separated, that is, the control plane (CU-CP) of the CU and the CU user plane (CU-UP). For example, the CU-CP and the CU-UP may be implemented by different functional entities, which may be coupled with the DU to perform the functions of the base station. In one possible approach, the CU-CP is responsible for controlling the plane functions, mainly including RRC and PDCP-C. PDCP-C is mainly responsible for the encryption and decryption of control plane data, integrity protection, data transmission and so on. CU-UP is responsible for user plane functions, mainly including SDAP and PDCP-U. The SDAP is mainly responsible for processing the data of the core network and mapping the data flow to the bearer. PDCP-U is mainly responsible for encryption and decryption of data planes, integrity protection, header compression, serial number maintenance, and data transmission. The CU-CP and CU-UP are connected through the E1 interface. The CU-CP represents the gNB connected to the core network through the Ng interface. Connected to the DU via F1-C (control plane). The CU-UP is connected to the DU through the F1-U (user plane). Of course, another possible implementation is that PDCP-C is also in CU-UP.

Terminal: It can be a wireless terminal or a wired terminal. A wireless terminal can refer to a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld or on-board. It can also be deployed on the water (such as a ship). Etc); can also be deployed in the air (such as airplanes, balloons, satellites, etc.). The terminal may be a mobile phone, a tablet, a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, and an industrial control. Wireless terminal, wireless terminal in self driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety, The wireless terminal in the smart city, the wireless terminal in the smart home, and the like are not limited herein. It can be understood that, in the embodiment of the present application, the terminal may also be referred to as a user equipment (UE).

The following embodiments of the present application may be applied to a Dual Connectivity (DC) and Carrier Aggregation (CA) scenario, but are not limited thereto.

DC: The terminal is connected to two or more carriers, and at least the RLC entity, the MAC entity, and the PHY entity of the two or more carriers are different. In the 3C architecture of the DC, the service data flows are mapped from the PDCP layer to the RLC, MAC, and PHY entities of each carrier, that is, have the same PDCP entity; in the 1A architecture of the DC, the service data flows from the core network (CoreNetwork, CN) is offloaded and mapped to different PDCP entities, RLC entities, MAC entities, and PHY entities, respectively. It can be understood that, in the embodiment of the present application, the two or more carriers in the DC may use the same communication standard, or may use different communication systems. For example, some carriers may use the LTE radio access communication standard to communicate with the terminal, and some carriers use the 5G New Radio (NR) wireless access communication system to communicate with the terminal.

CA: The terminal is connected to at least two carriers having the same PDCP entity, RLC entity, and MAC entity.

The following explains the protocol layers of the wireless network.

RRC layer: used to perform broadcast, paging, RRC connection establishment, radio bearer control, mobility management, terminal measurement reporting control, and the like.

The PDCP layer can perform services such as security, header compression, and encryption. The PDCP layer can correspond to multiple PDCP entities, and each PDCP entity carries data of one radio bearer (RB).

RLC layer: Perform services such as segmentation, reassembly, retransmission, etc. The RLC layer may correspond to multiple RLC entities, and each RLC entity provides services for the corresponding PDCP entity.

MAC layer: Provides data transmission services for services on logical channels, and performs acknowledgments such as scheduling, Hybrid Automatic Repeat reQuest (HARQ), and negative services.

PHY layer: encodes and transmits data transmitted from the MAC layer.

FIG. 2 is a schematic flowchart of a communication method according to an embodiment of the present disclosure. As shown in FIG. 2, the method in this embodiment may include:

S201. The terminal acquires the number of retransmissions of the first data packet.

The first data packet is any data packet received by the RLC layer of the terminal from the PDCP layer or any data packet generated by the RLC layer itself, and the first data packet is Radio Link Control (RLC) data. unit. The RLC data unit may be, for example, an RLC Service Data Unit (SDU), or an RLC SDU segment, or an RLC Protocol Data Unit (PDU), or an RLC Control PDU, or the above. A variety. In this embodiment, the terminal may obtain the number of retransmissions of the first data packet.

S202. Determine, according to the first logical channel, whether the RRC connection reestablishment condition is met, when the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions.

The logical channel (LCH) provides services on the service access point (SAP) between the MAC layer and the RLC layer, and defines different types of data services that the MAC layer can provide. The general logical channel can be divided into Two groups, one is a logical channel for transmitting control plane information, and the other is a logical channel for transmitting user plane information. The logical channel carrying the first data packet in this embodiment is referred to as a first logical channel.

In this embodiment, after obtaining the number of retransmissions of the first data packet, the terminal compares the obtained number of retransmissions with the maximum number of retransmissions:

For example, when the number of retransmissions of the first data packet is less than the maximum number of retransmissions, indicating that the first logical channel can guarantee the quality of service, the first logical channel may not be considered to satisfy the RRC connection reestablishment condition or may not further determine whether the first logical channel is determined. The RRC connection reestablishment condition is satisfied.

For example, when the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, the terminal in this embodiment does not directly request the RRC connection reestablishment from the network device, but may determine whether the RRC connection reestablishment condition is satisfied according to the first logical channel. Then, the terminal determines whether to request the RRC connection reestablishment to the network device according to whether the first logical channel satisfies the RRC connection reestablishment condition.

It can be understood that the maximum number of retransmissions in the embodiment may be that the network device is configured to the terminal by using a message, or may be preset and stored in the terminal, which is not limited in this embodiment of the present application.

In this embodiment, when the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, the terminal determines whether the RRC connection reestablishment condition is satisfied according to the first logical channel. The terminal may decide whether to request the RRC connection reestablishment to the network device according to whether the first logical channel satisfies the RRC connection reestablishment condition. The terminal avoids requesting the RRC connection reestablishment to the network device once the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, reducing the number of RRC connection reestablishment times, thereby reducing the number and time of interruption of the service of the terminal, and improving Communication quality.

In other embodiments, when the number of retransmissions of the first data packet is less than the maximum number of retransmissions, indicating that the first logical channel can guarantee the quality of service, the first logical channel may be considered as not satisfying the RRC connection reestablishment condition or may not need further Determining whether the first logical channel satisfies an RRC connection reestablishment condition. When the number of retransmissions of the first data packet is greater than the maximum number of retransmissions, determining whether the RRC connection reestablishment condition is satisfied according to the first logical channel.

FIG. 3 is a flowchart of a communication method according to another embodiment of the present disclosure. As shown in FIG. 3, the method in this embodiment may include:

S301. The terminal acquires the number of retransmissions of the first data packet.

S302. When the number of retransmissions is greater than or equal to the maximum number of retransmissions, the terminal determines, according to the first logical channel, whether the RRC connection reestablishment condition is met.

For the specific implementation process of the S301-S303 in this embodiment, refer to the description in the foregoing method embodiment, and details are not described herein again.

S303. The terminal requests the RRC connection reestablishment to the network device when determining that the RRC connection reestablishment condition is met.

If the terminal determines that the RRC connection reestablishment condition is met according to the first logical channel, the RRC connection reestablishment may be performed, for example, the terminal requests the RRC connection reestablishment from the network device. In a possible manner, the terminal may send the network device to include an indication for requesting the RRC connection. The message of the reconstructed information, for example, the message is an RRC connection reestablishment request message, and then the network device performs RRC connection reestablishment, and sends an RRC connection reestablishment message to the terminal, and the terminal sends an RRC connection reestablishment complete message to the network device after receiving the RRC connection reestablishment message. The process of the RRC connection reestablishment between the network device and the terminal is similar to the prior art, and details are not described herein again. If the terminal determines that the RRC connection reestablishment condition is not satisfied according to the first logical channel, it indicates that the RRC connection reestablishment may not be performed currently, and the terminal does not request the RRC connection reestablishment from the network device.

S304. The terminal sends a first message to the network device when determining that the RRC connection reestablishment condition is not met.

In this embodiment, if the terminal determines that the RRC connection reestablishment condition is not met according to the first logical channel, the first message is sent to the network device, where the first message includes information indicating that the first logical channel radio link fails, for example: The information indicating the failure of the first logical channel radio link may be: a field in the first message indicating a message type of the first message, where the first message indicates the first logical channel radio link by using a message type Failure, for example, if the message type of the first message includes two (this is an example, not limited to two): message types A and B, where message type A indicates that the logical channel radio link fails, and message type B does not Indicates that the logical channel radio link fails, so when the terminal determines that the RRC connection reestablishment condition is not satisfied, the first message with the message type A is sent to the network device instead of the first message with the message type B. For another example, the first message may add information to the message sent by the terminal to the network device in the prior art to indicate that the first logical channel radio link fails. In the embodiment of the present application, by instructing the first logical channel to fail the radio link, the network device is requested to perform corresponding processing on the first logical channel, such as reconfiguring the first logical channel, etc., and does not represent other A radio link failed on the logical channel. The failure of the radio link in the prior art refers to the failure of the radio link in the terminal. In this scenario, the terminal requests the network device to perform corresponding processing on all logical channels of the terminal, such as RRC connection reestablishment (that is, reconfiguration). All logical channels of the terminal) and so on.

In this embodiment, when the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, if the terminal determines that the RRC connection reestablishment condition is not satisfied according to the first logical channel, the terminal may stop sending data on the first logical channel. .

In other embodiments, when the number of retransmissions of the first data packet is greater than the maximum number of retransmissions, the terminal determines whether the RRC connection reestablishment condition is satisfied according to the first logical channel.

S305. The network device obtains, according to the first message, information indicating that the first logical channel radio link fails.

In this embodiment, the network device receives the first message from the terminal, and then parses the first message to obtain information indicating that the first logical channel radio link fails. For example, the information indicating the failure of the first logical channel radio link may be: a field in the first message indicating the message type of the first message, and the network device parses the first message to obtain the message of the first message. The field of the type determines the message type of the first message according to the field of the message type of the first message, and determines the first logical channel radio link failure according to the message type of the first message. For example, if the field of the message type of the first message indicates that the message type of the first message is A, the logical channel radio link fails according to the message type A, if the field of the message type of the first message indicates the first message. If the type is not A, but B, it is determined that the logical channel radio link failure is not indicated in the first message according to the message type B (ie, not A). For another example, the first message may be used by the network device in the prior art to add some content to the message received by the terminal to indicate that the first logical channel radio link fails. Since the network device can obtain the first logical channel radio link failure according to the first message, thereby determining that the first logical channel cannot guarantee the quality of service, the network device can then perform corresponding operations to ensure the quality of service carried on the first logical channel.

In some embodiments, the first message may further include at least one of the following: an identifier of the first logical channel, an identifier of a cell corresponding to the first logical channel, and a failure to indicate a first logical channel radio link failure. The reason information, the measurement result of the neighboring area of the terminal. The reason for the failure of the first logical channel radio link is, for example, that the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to the maximum retransmission number.

In some embodiments, the first message may be an RRC message or a medium access control control element (MAC CE) or a scheduling request (SR)/preamble.

In some embodiments, the network device may deactivate the cell corresponding to the first logical channel according to the first message, so that the network device may transfer the service carried by the first logical channel to another logical channel to ensure Quality of business. Alternatively, the network device may reconfigure the first logical channel from the current corresponding cell to the other cell according to the first message, and after the reconfiguration, the logical channel can guarantee the quality of service carried by the logical channel.

Optionally, the foregoing other cell may be a neighboring cell of the cell corresponding to the first logical channel. Optionally, the terminal may report the measurement result of the foregoing other cell to the network device. For example, the measurement result of the other cell may be included in the first message sent by the terminal to the network device, or may be included in the terminal to the network device. Other messages sent.

The determining, by the terminal, whether the RRC connection reestablishment condition is met according to the first logical channel may include the following implementation manner.

In a first possible implementation, the RRC connection reestablishment condition includes: a first serving cell corresponding to the first logical channel includes a primary serving cell of the terminal, where the first serving cell meets the a serving cell of the terminal of a mapping rule of the first logical channel, where the first serving cell may include one or more serving cells, and if the serving cell of the terminal that satisfies the mapping rule of the first logical channel is n, then The first serving cell is configured to include n serving cells.

Determining, by the terminal, whether the first serving cell corresponding to the first logical channel includes the primary serving cell of the terminal: if the first serving cell includes the primary serving cell of the terminal, determining that the RRC connection reestablishment condition is satisfied, if the first service is If the primary serving cell of the terminal is not included in the cell, it may be determined that the RRC connection reestablishment condition is not satisfied. If the primary serving cell of the first serving cell that does not include the mapping rule of the first logical channel does not include the primary serving cell of the terminal, the primary serving cell of the terminal can meet the requirements of the service quality, and the RRC connection reestablishment is not required to be performed, thereby reducing the service interruption of the terminal. The number and time of time to ensure the quality of communication.

The serving cell of the terminal refers to a cell that can provide data transmission for the terminal or a cell that has established a link with the terminal. The primary serving cell of the terminal refers to a cell that is operated/operating on the primary carrier, the terminal initiates an RRC connection establishment process in the primary serving cell, or the terminal initiates an RRC connection reestablishment process in the primary serving cell, or the primary serving cell may also be in the The primary cell specified by the network device during the handover.

The mapping rule of the first logical channel includes, for example, at least one of the following: an allowed subcarrier interval, an allowed maximum transmission time, an allowed serving cell, an allowed scheduling manner (such as an unlicensed scheduling or an authorized scheduling), and the like.

For example, if the mapping rule of the first logical channel is: the allowed serving cell is cell 1 and cell 2. Then, the serving cell that satisfies the mapping rule of the first logical channel is the cell 1 and the cell 2.

If the mapping rule of the first logical channel is: the allowed subcarrier spacing is 15 kHz, wherein the subcarrier spacing of the cell 1 is 15 kHz, and the subcarrier spacing of the cell 2 is 30 kHz, the service that satisfies the mapping rule of the first logical channel is described. The cell is cell 1.

If the mapping rule of the first logical channel is: the maximum allowed transmission time is 0.5 ms, wherein the maximum transmission time of the cell 1 is 0.5 ms, and the maximum transmission time of the cell 2 is 1 ms, the mapping rule of the first logical channel is satisfied. The serving cell is cell 1.

If the mapping rule of the first logical channel is: the allowed scheduling mode is exempt, wherein the scheduling mode of the cell 1 is an unlicensed scheduling, and the scheduling mode of the cell 2 is an authorized scheduling, indicating that the mapping rule of the first logical channel is met. The serving cell is cell 1.

If the mapping rule of the first logical channel includes the foregoing multiple allowed conditions, the serving cell that satisfies the mapping rule of the first logical channel may need to satisfy all the allowed conditions in the mapping rule, or may only need to meet the mapping rule. A condition may also only need to satisfy at least one condition in the mapping rule.

Therefore, when the number of retransmissions of the first data packet is greater than or equal to (or greater than) the maximum number of retransmissions, if the primary serving cell of the terminal satisfies the mapping rule of the first logical channel, the terminal requests the RRC connection reestablishment from the network device, thereby The number of RRC connection reestablishments can be reduced.

In a second possible implementation manner, the RRC connection reestablishment condition includes: a first serving cell corresponding to the first logical channel includes a primary serving cell of the terminal, where the first serving cell meets the a serving cell of the terminal of a mapping rule of the first logical channel, and no other serving cell other than the first serving cell may be used to carry an RRC message, where the first serving cell may include one or more For the serving cell, the mapping rule for the first logical channel can be referred to the above description, and details are not described herein again.

Determining, by the terminal, whether the first serving cell corresponding to the first logical channel includes the primary serving cell of the terminal: if the primary serving cell of the terminal is not included in the first serving cell, determining that the RRC connection reestablishment condition is not met, if the first service The primary serving cell of the terminal is included in the cell, and the serving cell other than the first serving cell is used to carry the RRC message, and it is determined that the RRC connection reestablishment condition is not met, if the first serving cell includes the main service of the terminal. The cell, and no other serving cell can be used to carry the RRC message, determines that the RRC connection reestablishment condition is satisfied.

Therefore, when the number of retransmissions of the first data packet is greater than or equal to (or greater than) the maximum number of retransmissions, if the primary serving cell satisfies the mapping rule of the first logical channel, but the other cell does not satisfy the mapping of the first logical channel. The rule can be used to carry the RRC message, and the terminal can indicate the link problem of the primary serving cell by using the other cell bearer RRC message, and does not need to perform RRC connection reestablishment, thereby reducing the number of RRC connection reestablishment.

In a third possible implementation manner, the RRC connection reestablishment condition includes: the first logical channel belongs to a preset logical channel that needs to trigger an RRC connection reestablishment.

Determining, by the terminal, whether the first logical channel belongs to a preset logical channel that needs to trigger an RRC connection reestablishment, and if the first logical channel belongs to a preset logical channel that needs to trigger an RRC connection reestablishment, determining that the first logical channel satisfies an RRC connection reestablishment condition; If the first logical channel does not belong to the preset logical channel that needs to trigger the RRC connection reestablishment, it is determined that the first logical channel does not satisfy the RRC connection reestablishment condition. For example, the preset logical channel includes logical channels 1, 2, and 3. If the first logical channel is logical channel 1, it is determined that the first logical channel satisfies the RRC connection reestablishment condition, and if the first logical channel is the logical channel 4, the first A logical channel does not satisfy the RRC connection reestablishment condition.

The preset logical channel that needs to trigger the RRC connection reestablishment refers to: a logical channel that needs to trigger an RRC connection reestablishment when the number of retransmissions of the carried data packet is greater than or equal to the maximum number of retransmissions.

Therefore, when the number of retransmissions of the first data packet is greater than or equal to (or greater than) the maximum number of retransmissions, the terminal requests the RRC connection to the network device if the first logical channel is a preset logical channel that needs to trigger the RRC connection reestablishment. Reconstruction, thereby reducing the number of RRC connection re-establishments.

In some embodiments, the network device also sends a second message to the terminal, the second message including information indicating a preset logical channel that needs to trigger an RRC connection re-establishment. Correspondingly, the terminal receives the second message from the network device, and determines, according to the second message, a preset logical channel that needs to trigger the RRC connection reestablishment. The preset logical channel that needs to trigger the RRC connection reestablishment in this embodiment is configured by the network device to the terminal.

In some embodiments, the information used to indicate a preset logical channel that needs to trigger an RRC connection reestablishment includes an identifier of the preset logical channel; or

The information for indicating a preset logical channel that needs to trigger an RRC connection reestablishment includes an identifier of at least one cell, where the preset logical channel includes a logical channel in the at least one cell, and the at least one cell may be a terminal Service area; or,

The information indicating the preset logical channel that needs to trigger the RRC connection reestablishment includes an identifier of the at least one radio data bearer, where the preset logical channel includes a logical channel corresponding to the at least one radio data bearer, where the radio data The bearers may correspond to the logical channels one by one, or one wireless data bearer may correspond to multiple logical channels; or

The information indicating the preset logical channel that needs to trigger the RRC connection reestablishment includes at least one carrier bandwidth part (BWP), where the preset logical channel includes the logical channel of the at least one BWP bearer; or

The information indicating the preset logical channel that needs to trigger the RRC connection reestablishment includes an identifier of at least one subcarrier interval, where the preset logical channel includes a logical channel corresponding to the at least one subcarrier interval.

In some embodiments, the second message includes an identifier of the at least one logical channel, where the at least one logical channel is a preset logical channel. Or the second message includes an identifier of each logical channel of the terminal and indication information indicating whether the logical channel needs to trigger an RRC connection reestablishment. Or the second message includes an identifier of each serving cell of the terminal and indication information indicating whether the logical channel corresponding to the serving cell needs to trigger an RRC connection reestablishment. Or the second message includes an identifier of each radio data bearer of the terminal and indication information indicating whether the logical channel corresponding to the radio data bearer needs to trigger an RRC connection reestablishment. Alternatively, the second message includes an identifier of each BWP of the terminal and indication information indicating whether the logical channel corresponding to each BWP requires RRC connection reestablishment. Or the second message includes an identifier of each subcarrier interval of the terminal and indication information indicating whether the logical channel corresponding to each subcarrier interval needs RRC connection reestablishment.

In some embodiments, the foregoing determining, by the terminal, whether the RRC connection reestablishment condition is met according to the first logical channel may be: when the RLC entity of the terminal determines that the retransmission number of the first data packet is greater than or equal to the maximum retransmission number, the RLC The entity notifies the RRC entity that the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions. Optionally, the RLC entity may also send the identifier of the corresponding logical channel (ie, the identifier of the first logical channel) to the RRC entity, RRC. The entity determines whether the RRC connection reestablishment condition is met according to the first logical channel. If yes, the RRC entity requests the RRC connection reestablishment from the network device. If not, the RRC entity sends the first message to the network device. Alternatively, another possible implementation manner may be: when the RLC entity determines that the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, the RLC entity determines, according to the first logical channel, whether the RRC connection reestablishment condition is met, if If yes, the RLC entity notifies the RRC entity that the RRC connection needs to be re-established, and then the RRC entity requests the RRC connection reestablishment from the network device. If not, the RLC entity notifies the RRC entity that the RRC connection is not required to be reestablished. Alternatively, the RLC entity may also provide the RRC entity to the RRC entity. Notifying the identity of the corresponding logical channel (ie, the identity of the first logical channel), then the RRC entity sends a first message to the network device.

In some embodiments, the network device further sends information to the terminal to indicate whether the terminal needs to determine whether the RRC connection reestablishment condition is met, that is, the terminal is enabled to perform determining whether the RRC connection reestablishment condition is satisfied. Correspondingly, after receiving, by the network device, information indicating that the terminal needs to determine whether the RRC connection reestablishment condition is met, the terminal may determine, according to the first logical channel, whether the RRC connection is satisfied, according to any one of the foregoing method embodiments. Reconstruction conditions. Optionally, if the network device does not send information to the terminal to indicate whether the terminal needs to determine whether the RRC connection reestablishment condition is met, or the network device sends, to the terminal, information indicating that the terminal does not need to determine whether the RRC connection reestablishment condition is met, The terminal does not need to determine whether the RRC connection reestablishment condition is met according to the first logical channel, that is, the terminal may not perform the solution of determining whether the RRC connection reestablishment condition is met in the foregoing method embodiments, and the retransmission times of the first data packet are greater than Or equal to the maximum number of retransmissions, request RRC connection reestablishment directly to the network device.

In a possible manner, when the terminal is in DC, the terminal can monitor the radio link quality of the secondary cell group (SCG), where the SCG includes the master cell group (MCG) of the terminal. The set of serving cells, that is, the SCG includes a primary secondary cell (PSCell). Optionally, the SCG may further include at least one other secondary serving cell. The MCG is composed of a primary serving cell and a secondary serving cell that belongs to the same base station as the primary serving cell. A PSCell is a serving cell in which a terminal performs a random access procedure in an SCG, or a service that initiates a Physical Uplink Shared Channel (PUSCH) transmission when a perform SCG change is performed and a random access procedure is not required. Community. A secondary cell (SCell) refers to a cell that operates on a secondary carrier, and is a serving cell configured by the network device to provide additional radio resources after the RRC is established. The base station to which the serving cell in the MCG belongs may be referred to as a master node (MN), and the base station to which the serving cell in the SCG belongs may be referred to as a secondary node (SN). The primary base station and the secondary base station may be different base stations or the same base station. In a possible manner, the SDAP entity, the PDCP entity, the RLC entity, the MAC entity, and the PHY entity of the network device side bearer service are deployed on different base stations (that is, some entities are deployed in the primary base station, and some entities are deployed in the secondary base station). ), or it may be deployed on the same base station. For example, the SDAP entity and/or the PDCP entity that carries certain services are deployed on the secondary base station, and the RLC entity, the MAC entity, and the PHY entity of the bearer service are deployed on the primary base station. Both the primary base station and the secondary base station may have an RRC entity. For example, in a Multi-RAT Dual Connectivity or/and NR-NR dual connection, both the primary base station and the secondary base station may have an RRC entity, which are respectively responsible for Radio resource control on its own side. MCG and SCG may use the same communication standard or different communication systems. For example, some carriers may use the LTE radio access communication system to communicate with the terminal, and some carriers use the 5G NR radio access communication system to communicate with the terminal. In the prior art, when the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, the terminal sends an SCG failure message to the network device, and all data transmissions are stopped between the terminal and the SCG, so that only some bearers are transmitted. In the case of services on the SCG, data transmission is interrupted. For services that are simultaneously carried on the MCG and the SCG, the data transmission rate is degraded, thereby affecting the communication quality.

In the embodiment of the present application, after the terminal obtains the number of retransmissions of the first data packet, the terminal determines whether the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions. Whether the primary serving cell (PSCell) of the terminal is included in the first serving cell corresponding to the first logical channel, and the first serving cell may refer to the related description in the foregoing embodiment, and details are not described herein again. If the first serving cell includes a primary and secondary serving cell of the terminal, the terminal sends an SCG failure message to the network device. If the primary serving cell does not include the primary and secondary serving cells of the terminal, the terminal sends the first message to the network device.

In some embodiments, the first data packet may be a data unit of an RLC of the MCG or a data unit of an RLC of the SCG. If the RLC entity of the MCG of the terminal determines that the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, the first data packet is a data unit of the RLC of the MCG, and then the terminal determines the first corresponding to the first logical channel. The serving cell includes a primary serving cell. If the primary serving cell is not included, the terminal sends a first message to the network device of the MCG. If the RLC entity of the SCG of the terminal determines that the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, the first data packet is a data unit of the RLC of the SCG, and then the terminal determines the first corresponding to the first logical channel. Whether the serving cell includes the primary and secondary serving cells, if the primary and secondary serving cells are not included, the terminal sends the first message to the network device of the SCG or the network device of the MCG. In addition, in some embodiments, the message type corresponding to the first message sent by the terminal to the network device of the MCG may be different from the message type corresponding to the first message sent by the terminal to the network device of the SCG.

In some embodiments (such as the embodiment of FIG. 3), in the second possible implementation manner that the terminal determines whether the RRC connection reestablishment condition is met according to the first logical channel, the other serving cell referred to above may be used to carry the RRC. The message indicates that the serving cell in the SCG can be used to carry the RRC message. In a possible manner, the RRC entity of the secondary base station can generate an RRC message, such as SRB3. The RRC message generated by the secondary base station can be directly used by the cell in the SCG to the terminal. The RRC message can be sent to the RRC entity of the secondary base station through the cell in the SCG. In another possible manner, the terminal can send the same RRC message in the SCG and the MCG. In another possible manner, the RRC message generated by the RRC entity in the primary base station may be sent by the serving cell in the SCG to the terminal, and the terminal may pass the serving cell in the SCG to the RRC in the primary base station. The entity sends an RRC message). Correspondingly, the sending, by the terminal, the first message to the network device may be sent by the terminal to the network device of the SCG. This first message can be carried in SRB3.

In some embodiments (such as the embodiment of FIG. 3), in the second possible implementation manner that the terminal determines whether the RRC connection reestablishment condition is met according to the first logical channel, the other serving cell referred to above may be used to carry the RRC. The message indicates that the serving cell in the MCG can be used to carry the RRC message. In a possible manner, the RRC entity of the secondary base station can generate an RRC message, such as SRB3. The RRC message generated by the secondary base station can be used by the cell in the MCG to the terminal. The terminal may also send an RRC message to the RRC entity of the secondary base station through the cell in the MCG. In another possible manner, the terminal may send the same RRC message to two or more serving cells in the MCG. ). Correspondingly, the sending, by the terminal, the first message to the network device may be sent by the terminal to the network device of the MCG.

FIG. 4 is a flowchart of a communication method according to another embodiment of the present application. As shown in FIG. 4, the method in this embodiment may include:

S401. The terminal acquires the number of retransmissions of the first data packet.

The first data packet is a data unit of the RLC. For the specific implementation process of the S401 in this embodiment, refer to the related description in the embodiment shown in FIG. 2, and details are not described herein again.

S402. The terminal sends a third message to the network device when the number of retransmissions of the first data packet is greater than or equal to the preset number of times.

In this embodiment, after the number of retransmissions of the first data packet is obtained, if the number of retransmissions of the first data packet is greater than or equal to the preset number of times, indicating that the first logical channel is unable to guarantee the service quality, the terminal may The network device sends a third message. The third message includes information indicating that the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to the preset number of times, where the first logical channel is a logical channel carrying the first data packet.

In other embodiments, the terminal may send the third message to the network device when the number of retransmissions of the first data packet is greater than the preset number of times.

S403. After receiving the third message, the network device determines, according to the third message, that the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to the preset number of times.

In this embodiment, the network device receives the third message from the terminal, and determines, according to the third message, that the number of retransmissions of the first data packet carried by the first logical channel is greater than or equal to the preset number of times. Then, the network device can perform corresponding operations to prevent the number of retransmissions of the data packets carried by the first logical channel from continuing to increase to be greater than or equal to the maximum number of retransmissions, thereby ensuring the quality of service carried on the first logical channel, thereby reducing the RRC connection. The number of reconstructions reduces the number and time that the terminal's services are in an interrupted state, improving communication quality.

In some embodiments, the network device may reconfigure the first logical channel from the currently corresponding cell to other cells according to the third message, and the logical channel may guarantee the quality of service carried by the logical channel after the reconfiguration to avoid the first logical channel. The number of retransmissions of the carried data packet is greater than or equal to the maximum number of retransmissions.

In other embodiments, when the number of retransmissions of the first data packet is equal to the preset number of times, the terminal may not send the third message to the network device.

In some embodiments, the third message may further include an identifier of the first logical channel to indicate to the network device that the logical channel carrying the number of retransmissions is greater than or equal to the preset number of times is a first logical channel. .

In some embodiments, the third message is carried in a Protocol Data Unit (PDU), where the third message includes information indicating that the PDU is a retransmission number control PDU, where The number of times control PDU is used to indicate that the number of retransmissions of the first data packet carried by the first logical channel is greater than or equal to the preset number of times. That is, when the number of retransmissions of the first data packet is greater than or equal to the preset number of times, the terminal sends a PDU to the network device, and the PDU is a retransmission number control PDU, and the retransmission number control PDU is used to indicate the first logic. The number of retransmissions of the data packets carried by the channel is greater than or equal to the preset number of times. Optionally, the PDU may further include a sequence number of the first data packet that is greater than or equal to a preset number of times. The foregoing PDU is generated by the PDCP entity of the terminal.

In some embodiments, the foregoing third message may be that the terminal sends the channel to the network device by using a channel corresponding to the logical channel other than the first logical channel, for example, the third message may be an RRC message. Alternatively, the third message may be a newly determined medium access control control element (MAC CE) or a scheduling request (SR)/preamble.

In some embodiments, after the terminal performs S402, the terminal starts a timer to prohibit the third message from being sent to the network device again before the timer expires. To prevent the terminal from transmitting the third message to the network device multiple times before the number of retransmissions of the first data packet is greater than or equal to the preset number of times and less than the maximum number of retransmissions.

In some embodiments, the network device further sends the information of the timer to the terminal. Accordingly, the terminal receives the information of the timer from the network device, thereby determining a timer. Therefore, the timer in this embodiment may be Configured by the network device to the terminal. The information of the timer refers to the length of the timer, for example, 10 ms.

In some embodiments, a possible implementation manner of the foregoing S402 includes: sending the third message to the network device when the number of retransmissions of the first data packet is greater than or equal to a preset number of times, and the retransmission number reporting period arrives . In this embodiment, the retransmission times reporting period timer may be set in the terminal. If the retransmission times reporting period timer expires and the number of retransmissions of the first data packet is greater than or equal to the preset number of times, the terminal may The network device sends a third message, and then the retransmission times reporting period timer is restarted.

In some embodiments, the network device may send the retransmission number reporting period information to the terminal, and the terminal receives the retransmission number reporting period information from the network device, thereby determining the retransmission number reporting period, The retransmission number reporting period in this embodiment may be configured by the network device to the terminal.

In some embodiments, the first information may be sent by the network device to the terminal, where the first information is used to notify the network device when the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to the preset number of times, and correspondingly The terminal receives the first information from the network device, and then, according to the first information, the terminal sends the third message to the network device when the number of retransmissions of the first data packet is greater than or equal to the preset number of times.

In some embodiments, the network device further sends information indicating the preset number of times to the terminal, and correspondingly, the terminal receives, from the network device, information for indicating the preset number of times, and the terminal is configured to indicate the preset according to the The number of times of the information may determine the size of the preset number of times. Therefore, the preset number of times in this embodiment may be configured by the network device to the terminal. It is to be understood that the preset number of times may be pre-stored in the terminal, which is not limited in this embodiment of the present application. The preset number of times is smaller than the maximum number of retransmissions in the foregoing embodiment.

In some embodiments, the information of the timer, the information of the retransmission times reporting period, and the information used to indicate the preset number of times may be included in the same message sent by the network device to the terminal, or may be included in the The different messages sent by the network device to the terminal.

In some embodiments, at least one of the information of the timer, the information of the retransmission number reporting period, and the information for indicating the preset number of times may include configuration information of the first logical channel that is sent by the network device to the terminal. in.

In other embodiments, different from the embodiment shown in FIG. 4, the terminal may obtain the number of retransmissions of the first data packet carried by the first logical channel, and send the number of retransmissions of the first data packet carried by the first logical channel to the network device when the retransmission number reporting period arrives. The number of retransmissions of the first data packet carried by the first logical channel, and correspondingly, the network device receives the number of retransmissions of the first data packet carried by the first logical channel from the terminal, if the number of retransmissions of the first data packet is greater than or equal to When the preset number of times, the network device can perform a corresponding operation to prevent the number of retransmissions of the data packet carried by the first logical channel from continuing to increase to be greater than or equal to the maximum number of retransmissions, thereby ensuring the quality of service carried on the first logical channel. In addition, the number of RRC connection reestablishments can be reduced, the number and time of interruption of the service of the terminal are reduced, and the communication quality is improved.

It can be understood that, in the above embodiments, the method or the step implemented by the terminal may also be implemented by components (such as chips or circuits) that can be used for the terminal, and the method or the step implemented by the network device may also be used. The components of the network device (such as chips or circuits, etc.) are implemented.

FIG. 5 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application. As shown in FIG. 5, the communication device 500 in this embodiment may be the terminal or network device mentioned in the foregoing method embodiments. The communication device can be used to implement the method corresponding to the terminal or the network device described in the foregoing method embodiments. For details, refer to the description in the foregoing method embodiment.

The communication device 500 can include one or more processors 501, which can also be referred to as processing units, that can implement certain control or processing functions. The processor 501 can be a general purpose processor or a dedicated processor or the like. For example, it can be a baseband processor, or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processor can be used to control the communication device, execute software programs, and process data of the software program.

In an alternative design, processor 501 may also store instructions 503 or data (eg, intermediate data). The instructions 503 can be executed by the processor such that the communication device 500 performs the method corresponding to the terminal or the network device described in the foregoing method embodiments.

In yet another possible design, communication device 500 can include circuitry that can implement the functions of transmitting or receiving or communicating in the foregoing method embodiments.

Optionally, the communication device 500 can include one or more memories 502 on which instructions 504 can be stored, the instructions can be executed on the processor, such that the communication device 500 performs the above method implementation. The method described in the example.

Optionally, the memory may also be stored in the memory. The processor and the memory may be provided separately or integrated.

Optionally, the communication device 500 may further include a transceiver 505 and/or an antenna 506. The processor 501 may be referred to as a processing unit to control a communication device (terminal or network device). The transceiver 505 can be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., for implementing a transceiving function of the communication device.

In one design, if the communication device 500 is used to implement operations corresponding to the terminals in the above embodiments. For example, the number of retransmissions of the first data packet may be acquired by the processor 501, where the first data packet is an RLC data unit; and when the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, according to The first logical channel determines whether an RRC connection reestablishment condition is satisfied, and the first logical channel is a logical channel carrying the first data packet. Or, for example, the number of retransmissions of the first data packet may be acquired by the processor 501, where the first data packet is a data unit of the RLC; and when the number of retransmissions of the first data packet is greater than or equal to a preset number of times The third message is sent by the transceiver 505 to the network device, where the third message includes information indicating that the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to the preset number of times, where A logical channel is a logical channel carrying the first data packet.

In another design, if the communication device is used to implement operations corresponding to the network devices in the above embodiments. For example, the transceiver 505 may receive a message for requesting RRC connection reestablishment from the terminal when the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions and meets the RRC connection reestablishment condition; or, in the first data packet The first message is received from the terminal when the number of retransmissions is greater than or equal to the maximum number of retransmissions, and the RRC connection reestablishment condition is not met, where the first message includes information indicating that the first logical channel radio link fails; Whether the RRC connection reestablishment condition is satisfied is determined according to the first logical channel, the first logical channel is a logical channel carrying the first data packet, and the first data packet is a data unit of the RLC. Alternatively, for example, the third message may be received by the transceiver 505 from the terminal, where the third message includes information indicating that the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to a preset number of times, the data The packet is a data unit of the RLC. The processor 501 determines, according to the third message, that the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to the preset number of times.

For a specific implementation process of the foregoing transceiver 505 and the processor 501, refer to the related descriptions of the foregoing embodiments, and details are not described herein again.

The processor 501 and the transceiver 505 described in the present application can be implemented in an integrated circuit (IC), an analog IC, a radio frequency integrated circuit (RFIC), a mixed signal IC, and an application specific integrated Circuit, ASIC), printed circuit board (PCB), electronic equipment, etc. The processor and transceiver can also be fabricated using various 1C process technologies, such as complementary metal oxide semiconductor (CMOS), n-type metal oxide semiconductor (n-metal oxide semiconductor) (n-type metal oxide semiconductor (nMetal-oxide-semiconductor, NMOS), P-type A positive oxide metal oxide semiconductor (PMOS), a Bipolar Junction Transistor (BJT), a bipolar CMOS (BiCMOS), a silicon germanium (SiGe), or a gallium arsenide (GaAs).

Although in the above description of the embodiment, the communication device 500 is described by taking a terminal or a network device as an example, the scope of the communication device described in the present application is not limited to the above terminal or the above network device, and the structure of the communication device may not be The limitation of Figure 5. Communication device 500 can be a standalone device or can be part of a larger device. For example, the device can be:

(1) a separate integrated circuit IC, or chip, or chip system or subsystem;

(2) having a set of one or more ICs, optionally, the set of ICs may also include storage means for storing data and/or instructions;

(3) an ASIC, such as a modem (MSM);

(4) modules that can be embedded in other devices;

(5) receivers, terminals, cellular phones, wireless devices, handsets, mobile units, network devices, etc.;

(6) Others and so on.

FIG. 6 is a schematic structural diagram of a terminal according to an embodiment of the present application. The terminal can be applied to the terminal described in the foregoing embodiments of the present application. For ease of explanation, Figure 6 shows only the main components of the terminal. As shown in FIG. 6, the terminal 600 includes a processor, a memory, a control circuit, an antenna, and an input and output device. The processor is mainly used for processing communication protocols and communication data, and controlling the entire terminal, executing software programs, and processing data of the software programs. Memory is primarily used to store software programs and data. The RF circuit is mainly used for the conversion of the baseband signal and the RF signal and the processing of the RF signal. The antenna is mainly used to transmit and receive RF signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are primarily used to receive user input data and output data to the user.

When the terminal is powered on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When the data needs to be transmitted by wireless, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal, and then sends the radio frequency signal to the outside through the antenna in the form of electromagnetic waves. When data is sent to the terminal, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.

Those skilled in the art will appreciate that FIG. 6 shows only one memory and processor for ease of illustration. In an actual terminal, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like.

As an optional implementation, the processor may include a baseband processor and a central processing unit, and the baseband processor is mainly used to process communication protocols and communication data, and the central processing unit is mainly used to control the entire terminal and execute the software. A program that processes data from a software program. The processor in FIG. 6 integrates the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit can also be independent processors and interconnected by technologies such as a bus. Those skilled in the art will appreciate that the terminal may include multiple baseband processors to accommodate different network standards. The terminal may include multiple central processors to enhance its processing capabilities, and various components of the terminal may be connected through various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The functions of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.

In one example, the antenna and control circuit having the transceiving function can be regarded as the transceiver module 601 of the terminal 600, and the processor having the processing function can be regarded as the processing module 602 of the terminal 600. As shown in FIG. 6, the terminal 600 includes a transceiver module 601 and a processing module 602. The transceiver module can also be referred to as a transceiver, a transceiver, a transceiver, and the like. Optionally, the device for implementing the receiving function in the transceiver module 601 can be regarded as a receiving module, and the device for implementing the sending function in the transceiver module 601 is regarded as a sending module, that is, the transceiver module 601 includes a receiving module and a sending module. The receiving module may also be referred to as a receiver, a receiver, a receiving circuit, etc., and the transmitting module may be referred to as a transmitter, a transmitter, or a transmitting circuit.

FIG. 7 is a schematic structural diagram of a communication device according to another embodiment of the present disclosure. The communication device may be a terminal, or may be a component of a terminal (for example, an integrated circuit, a chip, etc.), or may be another communication module. For implementing the operations or steps corresponding to the terminal in the method embodiment shown in FIG. 2 to FIG. 3, the communication device 700 may include: an obtaining module 701 and a processing module 702. Optionally, the communication device 700 may further include a sending module 703. Optionally, the communication device 700 can further include a receiving module 704.

The obtaining module 701 is configured to obtain a number of retransmissions of the first data packet, where the first data packet is an RLC data unit;

The processing module 702 is configured to determine, according to the first logical channel, whether the RRC connection reestablishment condition is met, where the first logical channel is the bearer, when the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions A logical channel of a packet.

Optionally, the sending module 703 is configured to request, by the processing module, the RRC connection reestablishment to the network device when the processing module determines that the RRC connection reestablishment condition is met.

Optionally, the sending module 703 is configured to send, by the processing module, the first message to the network device when the processing module determines that the RRC connection reestablishment condition is not met, where the first message is used to indicate that the first logical channel is wireless. Link failure information.

Optionally, the first message includes an identifier of the first logical channel.

Optionally, the processing module 702 is specifically configured to:

If the primary serving cell of the terminal is included in the first serving cell, determining that the RRC connection reestablishment condition is met, and/or if the first serving cell includes the primary serving cell of the terminal and determining that there is no The other serving cell other than the first serving cell may be used to carry an RRC message, and determine that the RRC connection reestablishment condition is met;

Optionally, the processing module 702 is further configured to:

If the primary serving cell of the terminal is not included in the first serving cell, determining that the RRC connection reestablishment condition is not met;

Optionally, the processing module 702 is specifically configured to:

Optionally, the processing module 702 is further configured to:

If the first logical channel does not belong to a preset logical channel that needs to trigger an RRC connection reestablishment, it is determined that the RRC connection reestablishment condition is not satisfied.

The receiving module 704 is configured to receive, by the network device, a second message, where the second message includes information indicating a preset logical channel that needs to trigger an RRC connection reestablishment.

Optionally, the information used to indicate a preset logical channel that needs to trigger an RRC connection reestablishment includes an identifier of the preset logical channel; or

The information indicating the preset logical channel that needs to trigger the RRC connection reestablishment includes the identifier of the at least one cell, where the at least one serving cell corresponding to the preset logical channel includes the at least one cell; or

The information indicating the preset logical channel that needs to trigger the RRC connection reestablishment includes an identifier of the at least one radio data bearer, where the preset logical channel includes a logical channel corresponding to the at least one radio data bearer, or

The communication device of this embodiment may be used to implement the technical solution of the terminal in the foregoing method embodiments, and the implementation principle and technical effects are similar, and details are not described herein again.

FIG. 8 is a schematic structural diagram of a communication apparatus according to another embodiment of the present disclosure. The communication apparatus may be a network device, or may be a component of a network device (for example, an integrated circuit, a chip, etc.), or may be other communications. The module is used to implement the operation corresponding to the network device in the method embodiment shown in FIG. 2 to FIG. 3, and the communication device 800 may include: a first receiving module 801 or a second receiving module 802. Optionally, the communication device 800 may further include a sending module 803.

The first receiving module 801 is configured to: when the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, and meet the RRC connection reestablishment condition, receive a message for requesting the RRC connection reestablishment from the terminal.

The second receiving module 802 is configured to receive the first message from the terminal when the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions and does not satisfy the RRC connection reestablishment condition, where the first message includes Information indicating that the first logical channel radio link fails;

Optionally, the satisfying the RRC connection reestablishment condition includes:

If the primary serving cell of the terminal is included in the first serving cell, the RRC connection reestablishment condition is met, and/or, if the first serving cell includes the primary serving cell of the terminal, and it is determined that there is no The other serving cell except the first serving cell may be used to carry the RRC message, and the RRC connection reestablishment condition is satisfied;

Optionally, the not satisfying the RRC connection reestablishment condition includes:

If the primary serving cell of the terminal is not included in the first serving cell, the RRC connection reestablishment condition is not met;

Alternatively, if the first serving cell includes the primary serving cell of the terminal and it is determined that other serving cells other than the first serving cell are available to carry the RRC message, the RRC connection reestablishment condition is not satisfied.

Optionally, the satisfying the RRC connection reestablishment condition includes: the first logical channel belongs to a preset logical channel that needs to trigger an RRC connection reestablishment.

If the first logical channel does not belong to a preset logical channel that needs to trigger RRC connection reestablishment, the RRC connection reestablishment condition is not satisfied.

Optionally, the sending module 803 is configured to send, to the terminal, a second message, where the second message includes information used to indicate a preset logical channel that needs to trigger an RRC connection reestablishment.

The information for indicating a preset logical channel that needs to trigger an RRC connection reestablishment includes an identifier of at least one cell, where the preset logical channel includes a logical channel in the at least one cell; or

The communication device of this embodiment may be used to implement the technical solution of the network device in the foregoing method embodiment, and the implementation principle and the technical effect are similar, and details are not described herein again.

FIG. 9 is a schematic structural diagram of a communication device according to another embodiment of the present disclosure. The communication device may be a terminal, or may be a component of a terminal (for example, an integrated circuit, a chip, etc.), or may be another communication module. For implementing the operations or steps corresponding to the terminal in the method embodiment shown in FIG. 4, the communication device 900 may include: a processing module 901 and a transceiver module 902. Optionally, the transceiver module 902 can also be divided into a receiving module and a sending module, the receiving module is configured to perform a receiving function, and the sending module is configured to perform a sending function.

The processing module 901 is configured to obtain a number of retransmissions of the first data packet, where the first data packet is a data unit of the RLC;

The transceiver module 902 is configured to send a third message to the network device when the number of retransmissions of the first data packet is greater than or equal to the preset number of times, where the third message includes The number of retransmissions of the data packet is greater than or equal to the information of the preset number of times, and the first logical channel is a logical channel that carries the first data packet.

Optionally, the third message further includes an identifier of the first logical channel.

Optionally, the third message is carried in the PDU, where the third message includes information indicating that the PDU is a retransmission number control PDU, and the retransmission number control PDU is used to indicate the first The number of retransmissions of the first data packet carried by the logical channel is greater than or equal to the preset number of times.

Optionally, the transceiver module 902 is specifically configured to: send the third message to the network device by using the first logical channel.

Optionally, the processing module 901 is configured to: after the sending module sends the third message to the network device, start a timer;

The transceiver module 902 is further configured to prohibit sending the third message to the network device again before the timer expires.

Optionally, the transceiver module 902 is further configured to receive information about the timer from the network device.

Optionally, the transceiver module 902 is specifically configured to:

Optionally, the transceiver module 902 is further configured to: receive information about the retransmission number reporting period from the network device.

Optionally, the transceiver module 902 is further configured to: receive the first information from the network device, where the first information is used to indicate that the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to a pre- The network device is notified when the number of times is set.

Optionally, the transceiver module 902 is further configured to: receive information for indicating the preset number of times from the network device.

10 is a schematic structural diagram of a communication device according to another embodiment of the present disclosure. The communication device may be a network device, or may be a component of a network device (for example, an integrated circuit, a chip, etc.), or may be other communications. The module is used to implement the operation corresponding to the network device in the method embodiment shown in FIG. 4. The communication device 1000 may include: a transceiver module 1001 and a processing module 1002. Optionally, the transceiver module 1001 can be divided into a receiving module and a sending module, the receiving module is configured to perform a receiving function, and the sending module is configured to perform a sending function.

The transceiver module 1001 is configured to receive a third message from the terminal, where the third message includes information used to indicate that the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to a preset number of times, where the data packet is RLC data unit;

The processing module 1002 is configured to determine, according to the third message, that the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to the preset number of times.

Optionally, the third message is carried in the PDU, where the third message includes information indicating that the PDU is a retransmission number control PDU, and the retransmission number control PDU is used to indicate the first The number of retransmissions of the data packet carried by the logical channel is greater than or equal to the preset number of times.

Optionally, the transceiver module 1001 is specifically configured to:

Receiving the third message from the terminal over the first logical channel.

Optionally, the transceiver module 1001 is further configured to:

And sending, to the terminal, information about a timer, where the timer is used to prohibit the terminal from sending the third message to the network device again before the timer expires.

Optionally, the transceiver module 1001 is further configured to:

Sending, to the terminal, information of a retransmission number reporting period, where the retransmission number reporting period is used by the terminal to send the third message when the retransmission number reporting period arrives.

Optionally, the transceiver module 1001 is further configured to:

The first information is sent to the terminal, where the first information is used to notify the network device when the number of retransmissions of the data packet carried by the first logical channel is greater than or equal to a preset number of times.

Optionally, the transceiver module 1001 is further configured to:

Sending information indicating the preset number of times to the terminal.

It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner. The functional modules in the embodiments of the present application may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules.

The integrated modules, if implemented in the form of software functional modules and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

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

Claims

A communication method, comprising:

Obtaining a number of retransmissions of the first data packet, where the first data packet is a radio link control RLC data unit;

When the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, determining, according to the first logical channel, whether the radio resource control RRC connection reestablishment condition is met, where the first logical channel is to carry the first data packet Logical channel.
The method of claim 1 further comprising:

When it is determined that the RRC connection reestablishment condition is satisfied, the RRC connection reestablishment is requested to the network device.
The method according to claim 1 or 2, further comprising:

When it is determined that the RRC connection reestablishment condition is not met, the first message is sent to the network device, where the first message includes information indicating that the first logical channel radio link fails.
The method of claim 3 wherein said first message comprises an identification of said first logical channel.
The method according to any one of claims 1-4, wherein the determining, according to the first logical channel, whether the RRC connection reestablishment condition is satisfied comprises:

If the first serving cell includes the primary serving cell of the terminal, determining that the RRC connection reestablishment condition is met, and/or, if the first serving cell includes the primary serving cell of the terminal, and determining that there is no Other serving cells outside a serving cell may be used to carry an RRC message, and determine that the RRC connection reestablishment condition is satisfied;

The first serving cell is a serving cell of the terminal that satisfies the mapping rule of the first logical channel.
The method of claim 5, further comprising:

If the primary serving cell of the terminal is not included in the first serving cell, determining that the RRC connection reestablishment condition is not met;

Or if the first serving cell includes the primary serving cell of the terminal and determines that another serving cell other than the first serving cell is available to carry the RRC message, determining that the RRC connection reestablishment condition is not met.
The method according to any one of claims 1-4, wherein the determining, according to the first logical channel, whether the RRC connection reestablishment condition is satisfied comprises:

If the first logical channel belongs to a preset logical channel that needs to trigger RRC connection reestablishment, it is determined that the RRC connection reestablishment condition is satisfied.
The method of claim 7 further comprising:

If the first logical channel does not belong to a preset logical channel that needs to trigger an RRC connection reestablishment, it is determined that the RRC connection reestablishment condition is not satisfied.
The method according to claim 7 or 8, further comprising:

Receiving a second message from the network device, the second message including information indicating a preset logical channel that needs to trigger an RRC connection re-establishment.
The method according to claim 9, wherein the information indicating the preset logical channel that needs to trigger the RRC connection reestablishment includes the identifier of the preset logical channel; or

The information indicating the preset logical channel that needs to trigger the RRC connection reestablishment includes the identifier of the at least one cell, where the at least one serving cell corresponding to the preset logical channel includes the at least one cell; or

The information indicating the preset logical channel that needs to trigger the RRC connection reestablishment includes an identifier of the at least one radio data bearer, where the preset logical channel includes a logical channel corresponding to the at least one radio data bearer, or

The information for indicating a preset logical channel that needs to trigger an RRC connection reestablishment includes at least one partial carrier bandwidth, where the preset logical channel includes a logical channel carried by the at least one partial carrier bandwidth.
A communication method, comprising:

When the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, and the RRC connection reestablishment condition is met, the terminal receives a message for requesting RRC connection reestablishment; or

Receiving, by the terminal, the first message, where the number of retransmissions of the first data packet is greater than or equal to the maximum number of retransmissions, and the RRC connection reestablishment condition is not met, where the first message includes Road failure information;

Whether the RRC connection reestablishment condition is satisfied is determined according to the first logical channel, where the first logical channel is a logical channel carrying the first data packet, and the first data packet is a data unit of a radio link control RLC.
The method of claim 11 wherein said first message comprises an identification of said first logical channel.
The method according to claim 11 or 12, wherein the satisfying the RRC connection reestablishment condition comprises:

If the primary serving cell of the terminal is included in the first serving cell, the RRC connection reestablishment condition is met, and/or, if the first serving cell includes the primary serving cell of the terminal, and it is determined that there is no The other serving cell except the first serving cell may be used to carry the RRC message, and the RRC connection reestablishment condition is satisfied;

The first serving cell is a serving cell of the terminal that satisfies the mapping rule of the first logical channel.
The method according to claim 13, wherein the not satisfying the RRC connection reestablishment condition comprises:

If the primary serving cell of the terminal is not included in the first serving cell, the RRC connection reestablishment condition is not met;

Alternatively, if the first serving cell includes the primary serving cell of the terminal and it is determined that other serving cells other than the first serving cell are available to carry the RRC message, the RRC connection reestablishment condition is not satisfied.
The method according to claim 11 or 12, wherein the satisfying the RRC connection reestablishment condition comprises: the first logical channel belongs to a preset logical channel that needs to trigger an RRC connection reestablishment.
The method according to claim 15, wherein the not satisfying the RRC connection reestablishment condition comprises:

If the first logical channel does not belong to a preset logical channel that needs to trigger RRC connection reestablishment, the RRC connection reestablishment condition is not satisfied.
The method according to claim 15 or 16, further comprising:

Sending a second message to the terminal, where the second message includes information indicating a preset logical channel that needs to trigger an RRC connection reestablishment.
The method of claim 17 wherein:

The information indicating the preset logical channel that needs to trigger the RRC connection reestablishment includes the identifier of the preset logical channel; or

The information for indicating a preset logical channel that needs to trigger an RRC connection reestablishment includes an identifier of at least one cell, where the preset logical channel includes a logical channel in the at least one cell; or

The information indicating the preset logical channel that needs to trigger the RRC connection reestablishment includes an identifier of the at least one radio data bearer, where the preset logical channel includes a logical channel corresponding to the at least one radio data bearer, or

The information for indicating a preset logical channel that needs to trigger an RRC connection reestablishment includes at least one partial carrier bandwidth, where the preset logical channel includes a logical channel carried by the at least one partial carrier bandwidth.
A communication device for implementing the communication method according to any one of claims 1 to 10 or 11 to 18.
A communication device, comprising: a processor and a transceiver;

The processor and the transceiver are for performing the communication method according to any one of claims 1 to 10 or any one of 11 to 18.
A chip, comprising: a memory and a processor;

The memory is configured to store program instructions;

The processor is configured to invoke a program instruction in the memory to perform the communication method according to any one of claims 1-10 or any one of 11-18.
A readable storage medium, wherein the readable storage medium stores a computer program; when the computer program is executed, implementing any one of claims 1-10 or 11-18 Communication method.
A program product, comprising: a computer program stored in a readable storage medium, the at least one processor of the communication device being readable from the readable storage medium The at least one processor executes the computer program such that the communication device implements the communication method of any one of claims 1-10 or any one of 11-18.