Communication method and device

Abstract

A communication method and apparatus, the method comprising: a network device sending a system message, the system message comprising first information, the first information being used for indicating an RLC configuration and / or an MAC configuration, and the first information being associated with a QoS parameter. The QoS parameter is a QoS parameter corresponding to a radio bearer, the radio bearer is a radio bearer between a first remote terminal and a second remote terminal, and the first remote terminal and the second remote terminal communicate through a relay terminal; and the terminal device determines an association relationship between the first radio bearer and the RLC configuration and / or the MAC configuration according to the first information and the first QoS parameter. The RLC configuration and / or the MAC configuration are / is associated with the QoS parameter, so that the terminal device can determine the RLC configuration and / or the MAC configuration corresponding to the first radio bearer according to the first QoS parameter. The method can be used for configuring the information of the radio bearer for the terminal in the U2U relay scene, and the configured signaling overhead can be saved.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a communication method and apparatus. Background Art

[0002] User equipment-to-user equipment (UE-to-UE / U2U) relay is a technology in which a relay device helps one user equipment communicate with another user equipment. In the U2U relay scenario, a remote UE can obtain service data adaptation protocol (SDAP) configuration and packet data convergence protocol (PDCP) configuration from system messages according to end-to-end (E2E) quality of service (QoS) parameters, and obtain radio link control (RLC) configuration and / or media access control (MAC) configuration from system messages according to the QoS of the corresponding radio bearer (RB) on the corresponding link in the E2E.

[0003] In the current protocol, the cell "SL-RadioBearerConfig" in system information block (SIB) 12 includes SDAP configuration and PDCP configuration, and the cell "SL-RLC-BearerConfig" includes RLC configuration and / or MAC configuration. The user equipment determines the corresponding SDAP configuration, PDCP configuration, and configuration index according to QoS parameters, and then determines the corresponding RLC bearer configuration (i.e., RLC configuration and / or MAC configuration) according to the configuration index, so as to obtain all configurations of the radio bearer.

[0004] In the U2U relay scenario, how to implement radio bearer configuration is a problem to be solved. Summary of the Invention

[0005] Embodiments of this application provide a communication method and apparatus for configuring information of a radio bearer for a terminal in a U2U relay scenario, which can save signaling overhead.

[0006] To achieve the above object, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, an embodiment of the present application provides a communication method, which can be executed by a first communication device. The first communication device can be a combined device, component, etc. for implementing the functions of a terminal device. For example, the first communication device is a terminal device, or the first communication device is a unit / module, circuit, or chip inside the terminal device, etc. The method provided in the first aspect is described below by taking the first communication device as the terminal device itself as an example.

[0008] The communication method includes: The terminal device receives a system message, and the system message includes first information, where the first information is used to indicate the RLC configuration and / or the MAC configuration, and the first information is associated with QoS parameters. The QoS parameters are QoS parameters corresponding to a radio bearer, and the radio bearer is a radio bearer between a first remote terminal and a second remote terminal, and the first remote terminal and the second remote terminal communicate through a relay terminal; the terminal device determines the association relationship between the first radio bearer and the RLC configuration and / or the MAC configuration according to the first information and the first QoS parameter.

[0009] In this method, the RLC configuration and / or the MAC configuration are associated with the QoS parameters, so that the terminal device can determine the RLC configuration and / or the MAC configuration corresponding to the first radio bearer according to the first QoS parameter. By this method, the configuration of SDAP and the configuration of PDCP can be saved, thereby saving the overhead of the system message and saving resources.

[0010] In one implementation, the method is applied to a first terminal (i.e., the terminal device is the first terminal), the first radio bearer is a radio bearer between the first terminal and the second terminal, and the first terminal and the second terminal communicate through a third terminal. The first QoS parameter is the QoS parameter corresponding to the first radio bearer on a first link, and the first link is the link between the first terminal and the third terminal.

[0011] In one implementation, the method is applied to a third terminal (i.e., the terminal device is the third terminal), the first radio bearer is a radio bearer between the first terminal and the second terminal, and the first terminal and the second terminal communicate through a third terminal. The first QoS parameter is the QoS parameter corresponding to the first radio bearer on a second link, and the second link is the link between the third terminal and the second terminal.

[0012] In one implementation, the first information is used to indicate the RLC configuration and / or the MAC configuration, including: The first information includes the RLC configuration and / or the MAC configuration.

[0013] In one implementation, the first information is associated with the QoS parameters, including: The first information includes a QoS parameter list, the QoS parameter list includes the QoS parameters, and the QoS parameter list has an association relationship with the RLC channel.

[0014] In this method, the QoS parameter list corresponds to the radio bearer, and the QoS parameter list is associated with the RLC channel. In this way, by configuring the QoS parameter list, the RLC configuration and / or MAC configuration can be associated with the QoS parameters.

[0015] In one implementation, the QoS parameter list indicates the QoS parameters mapped to the RLC channel. In this way, the terminal device can obtain the mapping relationship between the RLC channel and the first radio bearer according to the first information.

[0016] In one implementation, the first information further includes an RLC configuration index or an RLC channel identifier. The RLC channel can be default or non-default. By using the RLC configuration index or the RLC channel identifier to indicate the RLC channel, the default RLC channel or the non-default RLC channel can be indicated.

[0017] In one implementation, the first information includes a first indication information, which is used to indicate the default RLC channel. Based on the default RLC channel, it can be avoided that the terminal device cannot find the RLC and / or MAC configuration corresponding to the per-hop QoS of the first radio bearer, and further avoid not knowing which RLC channel to map the first radio bearer to.

[0018] In one implementation, the method is applied to the first terminal (i.e., the terminal device is the first terminal). The terminal device determines the association relationship between the first radio bearer and the RLC configuration and / or MAC configuration according to the first information and the first QoS parameter, including: the first terminal determines the first QoS parameter according to the SDAP configuration, and the SDAP configuration is determined according to the second QoS parameter, and the second QoS parameter is the end-to-end QoS parameter between the first terminal and the second terminal; the first terminal determines the RLC configuration and / or MAC configuration according to the first QoS parameter.

[0019] The first terminal can be a remote terminal. The first terminal can determine the SDAP configuration according to the end-to-end QoS parameter, determine the first QoS parameter according to the SDAP configuration, and thus determine the RLC configuration and / or MAC configuration according to the first QoS parameter and the first information.

[0020] In one implementation, the method is applied to the third terminal (i.e., the terminal device is the third terminal). The terminal device determines the association relationship between the first radio bearer and the RLC configuration and / or MAC configuration according to the first information and the first QoS parameter, including: the third terminal receives the SDAP configuration from the first terminal, determines the first QoS parameter according to the SDAP configuration, and determines the RLC configuration and / or MAC configuration according to the first QoS parameter.

[0021] The third terminal may be a relay terminal that obtains the SDAP configuration from the first terminal. Based on the SDAP configuration, the first QoS parameter can be determined. Thus, based on the first QoS parameter and the first information, the RLC configuration and / or the MAC configuration can be determined.

[0022] In a second aspect, an embodiment of the present application provides a communication method that can be executed by a first communication device. The first communication device may be a combined device, component, etc. for implementing the functions of a terminal device. For example, the first communication device is a terminal device, or the first communication device is a unit / module, circuit, or chip inside the terminal device, etc. The method provided in the second aspect will be described below by taking the first communication device as the terminal device itself as an example.

[0023] The communication method includes: The terminal device receives a system message, and the system message includes second information that is used to indicate the SDAP configuration and / or the PDCP configuration; wherein, the second information is associated with the QoS parameter, and the QoS parameter is the QoS parameter corresponding to the radio bearer. The radio bearer is the radio bearer between the first remote terminal and the second remote terminal, and the first remote terminal and the second remote terminal communicate through a relay terminal; or, the second information is associated with the RLC configuration; the terminal device determines the configuration of the first radio bearer based on the second information and the first QoS parameter.

[0024] In this method, the SDAP configuration and / or the PDCP configuration (or the end-to-end configuration) are associated with the RLC channel according to the QoS parameter corresponding to the link of the end-to-end radio bearer. In this way, the terminal device can determine the configuration corresponding to the complete radio bearer based on the end-to-end QoS parameter and the QoS parameter corresponding to the link of the end-to-end radio bearer, which can reduce the complexity of determining the mapping relationship between the radio bearer and the RLC channel for the terminal device.

[0025] In one implementation, the method is applied to the first terminal (i.e., the terminal device is the first terminal), the first radio bearer is the radio bearer between the first terminal and the second terminal, and the first terminal and the second terminal communicate through the third terminal. The first QoS parameter is the QoS parameter corresponding to the first radio bearer on the first link, and the first link is the link between the first terminal and the third terminal.

[0026] In one implementation, the method is applied to the third terminal (i.e., the terminal device is the third terminal), the first radio bearer is the radio bearer between the first terminal and the second terminal, and the first terminal and the second terminal communicate through the third terminal. The first QoS parameter is the QoS parameter corresponding to the first radio bearer on the second link, and the second link is the link between the third terminal and the second terminal.

[0027] In one implementation, the second information is used to indicate the SDAP configuration and / or the PDCP configuration, including: the second information includes the SDAP configuration and / or the PDCP configuration.

[0028] In one implementation, the second information is associated with the QoS parameter, including: the second information includes a QoS parameter list, and the QoS parameter list includes the QoS parameter.

[0029] In this method, the QoS parameter list is associated with the SDAP configuration and / or the PDCP configuration. In this way, the end-to-end configuration can be associated with the RLC channel through the QoS parameter corresponding to the link of the end-to-end radio bearer.

[0030] In one implementation, the second information is associated with the RLC configuration, including: the second information includes a second indication information, and the second indication information is used to indicate the RLC channel associated with the radio bearer. It is relatively simple to clearly indicate the RLC channel associated with the radio bearer through the second indication information.

[0031] In one implementation, the system message further includes a first information, and the first information is used to indicate the RLC configuration and / or the configuration. The first information is associated with the QoS parameter.

[0032] In one implementation, the first information is associated with the QoS parameter, including: the first information includes a QoS parameter list, the QoS parameter list includes the QoS parameter, and the QoS parameter list has an association relationship with the RLC channel.

[0033] In one implementation, the first information includes a first indication information, and the first indication information is used to indicate the default RLC channel.

[0034] In one implementation, the second indication information is further used to indicate the default RLC channel.

[0035] Regarding the beneficial effects of the second aspect and each implementation, reference can be made to the beneficial effects of the foregoing first aspect and each implementation, which will not be elaborated here.

[0036] In a third aspect, an embodiment of the present application provides a communication method, which can be executed by a second communication device. The second communication device can be a combined device, component, etc. for implementing the functions of a network device. For example, the second communication device is a network device, or the second communication device is a unit / module, circuit or chip inside the network device, etc. The method provided in the third aspect will be described below by taking the second communication device as the network device itself as an example.

[0037] The communication method includes: a network device determines system information and broadcasts the system information. The system information includes first information, which is used to indicate the RLC configuration and / or the MAC configuration, and the first information is associated with QoS parameters. The QoS parameters are QoS parameters corresponding to a radio bearer, and the radio bearer is a radio bearer between a first remote terminal and a second remote terminal, and the first remote terminal and the second remote terminal communicate through a relay terminal.

[0038] In one implementation, the first information is used to indicate the RLC configuration and / or the MAC configuration, including: the first information includes the RLC configuration and / or the MAC configuration.

[0039] In one implementation, the first information is associated with QoS parameters, including: the first information includes a QoS parameter list, the QoS parameter list includes the QoS parameters, and the QoS parameter list has an association relationship with an RLC channel.

[0040] In one implementation, the QoS parameter list indicates the QoS parameters mapped to the RLC channel.

[0041] In one implementation, the first information further includes an RLC configuration index or an RLC channel identifier.

[0042] In one implementation, the first information includes first indication information, which is used to indicate a default RLC channel.

[0043] In a fourth aspect, an embodiment of the present application provides a communication method, which can be executed by a second communication device. The second communication device may be a combined device, component, etc. for implementing the functions of a network device. For example, the second communication device is a network device, or the second communication device is a unit / module, circuit, or chip inside the network device, etc. The method provided in the fourth aspect is described below by taking the second communication device as the network device itself as an example.

[0044] The communication method includes: a network device determines system information and broadcasts the system information. The system information includes second information, which is used to indicate the SDAP configuration and / or the PDCP configuration. Among them, the second information is associated with QoS parameters, the QoS parameters are QoS parameters corresponding to a radio bearer, and the radio bearer is a radio bearer between a first remote terminal and a second remote terminal, and the first remote terminal and the second remote terminal communicate through a relay terminal; or the second information is associated with the RLC configuration; the terminal device determines the configuration of the first radio bearer according to the second information and the first QoS parameters.

[0045] In one implementation, the second information is used to indicate the SDAP configuration and / or the PDCP configuration, including: the second information includes the SDAP configuration and / or the PDCP configuration.

[0046] In one implementation, the second information is associated with QoS parameters, including: the second information includes a QoS parameter list, and the QoS parameter list includes the QoS parameters.

[0047] In one implementation, the second information is associated with the RLC configuration, including: the second information includes second indication information, and the second indication information is used to indicate the RLC channel associated with the radio bearer.

[0048] In one implementation, the system message further includes first information, and the first information is used to indicate the RLC configuration and / or configuration, and the first information is associated with the QoS parameters.

[0049] In one implementation, the first information is associated with QoS parameters, including: the first information includes a QoS parameter list, the QoS parameter list includes the QoS parameters, and the QoS parameter list has an association relationship with the RLC channel.

[0050] In one implementation, the first information includes first indication information, and the first indication information is used to indicate the default RLC channel.

[0051] In one implementation, the second indication information is further used to indicate the default RLC channel.

[0052] In a fifth aspect, an embodiment of the present application provides a communication device, and the communication device has a function of implementing the behaviors in any of the method examples of the first aspect to the fourth aspect, and the beneficial effects can be seen in the relevant descriptions of the first aspect to the fourth aspect, which will not be elaborated here. For example, the communication device may be a terminal device in the first aspect or the second aspect, or the communication device may be a device capable of supporting the terminal device to implement the functions required by the methods provided in the first aspect or the second aspect. For example, the communication device may be a chip or a chip system in the terminal device. Again, for example, the communication device may be a network device in the third aspect or the fourth aspect, or the communication device may be a device capable of supporting the network device to implement the functions required by the methods provided in the third aspect or the fourth aspect. For example, the communication device may be a chip or a chip system in the network device.

[0053] In a possible design, the communication device includes a baseband device and a radio frequency device.

[0054] In a possible design, the communication device includes corresponding means or modules for performing the methods of any of the first to fourth aspects. For example, the communication device includes a processing unit (sometimes also referred to as a processing module or a processor) and / or a transceiver unit (sometimes also referred to as a transceiver module or a transceiver). The transceiver unit can implement the sending function and the receiving function. When the transceiver unit implements the sending function, it can be referred to as a sending unit (sometimes also referred to as a sending module). When the transceiver unit implements the receiving function, it can be referred to as a receiving unit (sometimes also referred to as a receiving module). The sending unit and the receiving unit can be the same functional unit, and this functional unit is called the transceiver unit, which can implement the sending function and the receiving function. Or, the sending unit and the receiving unit can be different functional units, and the transceiver unit is a general term for these functional units. These units (modules) can perform the corresponding functions in the method examples of any of the first to fourth aspects above. For specific details, refer to the detailed description in the method examples, and no further elaboration will be provided here.

[0055] In a sixth aspect, an embodiment of the present application provides a communication device, which can be the communication device in the fifth aspect in the above embodiment, or a chip or a chip system disposed in the communication device in the fifth aspect. The communication device includes a communication interface and a processor. Optionally, it further includes a memory. The memory is used to store computer programs or instructions or data. The processor is coupled to the memory and the communication interface. When the processor reads the computer programs or instructions or data, the communication device is caused to execute the methods performed by the terminal device in the above method embodiments. For example, the communication device can be a terminal device or a functional module in the terminal device, such as a baseband chip and a radio frequency chip. Or, when the processor reads the computer programs or instructions or data, the communication device is caused to execute the methods performed by the network device in the above method embodiments. For example, the communication device can be a network device or a functional module in the network device, such as a baseband chip and a radio frequency chip.

[0056] In a seventh aspect, an embodiment of the present application provides a chip system, which includes a processor and may further include a communication interface for implementing the methods described in any of the first to fourth aspects. Optionally, the chip system further includes a memory. The memory is used to store computer programs (which can also be referred to as code or instructions). The processor is used to call and run the computer programs from the memory, so that the device equipped with the chip system executes the methods in any of the first to fourth aspects and any of their possible implementation manners. The chip system can be composed of chips or can include chips and other discrete devices.

[0057] In an eighth aspect, an embodiment of the present application provides a communication device, which includes an input / output interface and a logic circuit. The input / output interface is used to input and / or output information. The input / output interface may be an interface circuit, an output circuit, an input circuit, a pin, or a related circuit, etc. The logic circuit is used to execute the method described in any one of the first aspect to the fourth aspect.

[0058] In a specific implementation process, the above communication device may be a chip. The input circuit may be an input pin, the output circuit may be an output pin, and the logic circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits, etc. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver. The signal output by the output circuit may be output to, for example, but not limited to, a transmitter and transmitted by the transmitter. And the input circuit and the output circuit may be the same circuit, which is used as the input circuit and the output circuit at different times respectively. The present application does not limit the specific implementation manners of the input / output interface and the logic circuit.

[0059] In one implementation manner, when the communication device is a wireless communication device, the wireless communication device may be a terminal device such as a mobile phone, or the wireless communication device may be a network device such as a base station. The interface circuit may be a radio frequency processing chip in the wireless communication device, and the processing circuit may be a baseband processing chip in the wireless communication device.

[0060] In a ninth aspect, an embodiment of the present application provides a communication system, which includes a first communication device and a second communication device. Among them, the first communication device is used to implement the functions of the method described in the first aspect, and the second communication device is used to implement the functions of the method described in the third aspect; or, the first communication device is used to implement the functions of the method described in the second aspect, and the second communication device is used to implement the functions of the method described in the fourth aspect. The first communication device may be a terminal device, or the first communication device is a component used to implement the functions of a terminal device. For example, the first communication device is a unit / module, a circuit, or a chip inside the terminal device, etc. The second communication device may be a network device, or the second communication device is a component used to implement the functions of a network device. For example, the second communication device is a unit / module, a circuit, or a chip inside the network device, etc.

[0061] In a tenth aspect, an embodiment of the present application provides a computer-readable storage medium, which is used to store a computer program or instruction. When it runs, the methods described in any one of the first aspect to the fourth aspect and any one of their implementation manners are implemented.

[0062] In a tenth aspect, an embodiment of the present application further provides a computer program product including instructions, which, when running on a computer, enables the methods described in any one of the first to fourth aspects and any implementation manner thereof to be implemented.

[0063] For the beneficial effects of the third to tenth aspects and their implementation manners above, reference may be made to the beneficial effects of the first to second aspects and any implementation manner thereof. Description of the Drawings

[0064] Figure 1 It is a schematic architecture diagram of a communication system provided by an embodiment of the present application;

[0065] Figure 2 It is a schematic diagram of a communication system of U2U Relay provided by an embodiment of the present application;

[0066] Figure 3 It is a schematic diagram of the protocol stack of L2 in the U2U relay technology provided by an embodiment of the present application;

[0067] Figure 4 It is a schematic flowchart of the process for a remote UE and a relay UE to obtain an SL communication configuration provided by an embodiment of the present application;

[0068] Figure 5 It is a schematic flowchart of communication method 500 provided by an embodiment of the present application;

[0069] Figure 6 It is a schematic flowchart of communication method 600 provided by an embodiment of the present application;

[0070] Figure 7 It is a schematic flowchart of communication method 700 provided by an embodiment of the present application;

[0071] Figure 8 It is a schematic structural diagram of a communication device provided by an embodiment of the present application;

[0072] Figure 9 It is another schematic structural diagram of a communication device provided by an embodiment of the present application. Detailed Embodiments

[0073] In the embodiment of the present application, the configuration of the U2U RLC channel is added to the system message, and this configuration is associated with the QoS corresponding to the end-to-end radio bearer on the link; alternatively, the configuration of the U2U radio bearer is added to the system message, and this configuration is associated with the end-to-end QoS and the QoS corresponding to the end-to-end radio bearer on the link, so as to implement the configuration of the U2U radio bearer. In this way, the SDAP configuration and the PDCP configuration can be saved, thereby saving the overhead of the system message and saving resources. In addition, in the embodiment of the present application, the end-to-end configuration is associated with the RLC channel according to the QoS corresponding to the end-to-end radio bearer on the link. In this way, the terminal device can determine the configuration corresponding to the complete radio bearer on the link according to the end-to-end QoS and the QoS corresponding to the end-to-end radio bearer on the link, and the complexity of determining the mapping relationship between the radio bearer and the RLC channel by the terminal device can be reduced. The solution provided by the embodiment of the present application will be introduced below with reference to the accompanying drawings.

[0074] The technical solution provided by the embodiment of the present application can be applied to a communication system related to the 3rd generation partnership project (3GPP), for example, a long term evolution (LTE) communication system, a 5th generation (5G) mobile communication system, or can also be applied to other next-generation mobile communication systems, such as a 6th generation (6G) communication system, or other similar communication systems. Other similar communication systems may include wireless fidelity (WIFI), vehicle to everything (V2X), internet of things (IoT) system, narrow band internet of things (NB-IoT) system, and so on.

[0075] Please refer to Figure 1 , which shows a communication system applicable to the embodiment of the present application. This communication system includes a radio access network 100 and a core network 200. Optionally, this communication system may further include the Internet 300 ( Figure 1 taking this as an example).

[0076] Among them, the radio access network 100 may include at least one network device and at least one terminal device. For example, the radio access network 100 includes two network devices 110a and 110b and terminal devices 120a to 120j, etc. The network device and the terminal device can communicate through the air interface (Uu interface), and the communication link between the network device and the terminal device is also called the Uu interface communication link. Figure 1The network architecture shown is only illustrative, and the number of terminal devices and / or network devices can be less or more. The communication system described in the embodiments of this application is to more clearly illustrate the technical solutions of the embodiments of this application, and does not constitute a limitation on the communication systems applicable to the embodiments of this application. For example, the communication system may further include other devices, such as wireless relay devices and wireless backhaul devices, etc., which are not drawn in Figure 1 the figure. Those of ordinary skill in the art will know that as the network architecture evolves, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems. When applying the technical solutions of the embodiments of this application to other communication systems, the devices, components, modules, etc. in the embodiments can be replaced with the corresponding devices, components, modules in other communication systems, without limitation.

[0077] In the embodiments of this application, the network device refers to a radio access network (RAN) device. The RAN can be a 3GPP-related cellular system, for example, a 5G / new radio (NR) mobile communication system, or an evolved system for the future (such as a 6G mobile communication system). The RAN can also be an open RAN (O-RAN or ORAN), a cloud radio access network (CRAN), or a virtualized RAN (vRAN), etc. The RAN can also be a communication system that integrates two or more of the above systems. The RAN device can also be referred to as a RAN node, a RAN entity, or an access node, etc.

[0078] In one possible scenario, the RAN node can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a next generation base station in a 6G mobile communication system, a base station in a future mobile communication system, etc. The RAN node can be a macro base station, a micro base station, an indoor station, a relay node, a donor node / host node, or a wireless controller, etc. The RAN node can also be a server, a wearable device, a vehicle, or an in-vehicle device, etc. For example, the RAN node in V2X technology can be a road side unit (RSU).

[0079] In another possible scenario, the RAN node can be a module or unit that completes some functions of the base station; or multiple RAN nodes cooperate to assist the terminal device in achieving wireless access, and different RAN nodes respectively implement some functions of the base station. For example, the RAN node can be a central unit (CU), a distributed unit (DU), a radio unit (RU), etc. The functions of the CU can be implemented by one entity, or can also be implemented by different entities. For example, the functions of the CU can be further divided, that is, the control plane and the user plane are separated and implemented by different entities, namely the CU entity of the control plane (i.e., the CU-control plane (CP) entity) and the CU entity of the user plane (i.e., the CU-user plane (UP) entity). The CU-CP entity and the CU-UP entity can be coupled with the DU to jointly complete the functions of the RAN node. The CU and the DU can be set separately, or can also be included in the same network element, such as the baseband unit (BBU).

[0080] In different systems, the CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, the CU can also be called O-CU (open CU), the DU can also be called O-DU, the CU-CP can also be called O-CU-CP, the CU-UP can also be called O-CU-UP, and the RU can also be called O-RU. For the convenience of description, in this application, the CU, CU-CP, CU-UP, DU, and RU are used as examples for description. Any one of the CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through a software module, a hardware module, or a combination of a software module and a hardware module.

[0081] The CU and DU can be configured according to the protocol layer functions of the wireless network they implement. For example, the CU is configured to implement the functions of the PDCP layer and the protocol layers above it (such as the radio resource control (RRC) layer and / or the SDAP layer, etc.); the DU is configured to implement the functions of the protocol layers below the PDCP layer (such as the RLC layer, the MAC layer, and / or the physical (PHY) layer, etc.). Another example is that the CU is configured to implement the functions of the protocol layers above the PDCP layer (such as the RRC layer and / or the SDAP layer), and the DU is configured to implement the functions of the protocol layers at and below the PDCP layer (such as the RLC layer, the MAC layer, and / or the PHY layer, etc.). For the specific descriptions of the above-mentioned protocol layers, reference can be made to the relevant technical specifications of 3GPP or the technical specifications of other applicable communication protocols. The division of the processing functions of the CU and DU according to the protocol layer above is only an example, and it can also be divided in other ways, which is not limited in this application. For example, in one design, the CU or DU can also be divided into parts with partial processing functions of the protocol layer. In one design, some functions of the RLC layer and the functions of the protocol layers above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are set in the DU.

[0082] In the embodiments of this application, the device for implementing the functions of the network device can be the network device itself, or a device that can support the network device to implement such functions, such as a chip system or a combined device or component that can implement the functions of the network device, and this device can be installed in the network device. The embodiments of this application do not limit the specific technologies and specific device forms adopted by the network device.

[0083] In the embodiments of the present application, any device capable of data communication with a base station can be regarded as a terminal device. A terminal device is also referred to as a terminal, a terminal device, a user equipment (UE), a mobile station, or a mobile terminal, etc. Terminal devices can be widely applied in various scenarios. For example, terminal devices can be: mobile phones, computers, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, stations (STAs), robotic arms, cameras, robots, vehicles, drones, helicopters, airplanes, ships, or smart home devices (such as TVs, air conditioners, floor sweepers, speakers, set-top boxes), relays, customer premise equipment (CPEs), smart cars (or intelligent cars), digital cars, driverless cars (or pilotless cars or unmanned cars), self-driving cars (or autonomous cars), battery electric vehicles (BEVs), hybrid electric vehicles (HEVs), range extended electric vehicles (REEVs), plug-in hybrid electric vehicles (PHEVs), new energy vehicles, roadside units (RSUs), etc. Terminal devices can also be terminal devices in an IoT system. For example, water meters, electricity meters, etc.

[0084] As described above, if various terminal devices are located on a vehicle (for example, placed / installed inside a vehicle), they can all be considered in-vehicle terminal devices. The in-vehicle terminal device can be built into an in-vehicle module, in-vehicle module group, in-vehicle component, in-vehicle chip, or in-vehicle unit of the vehicle as one or more components or units. The vehicle can implement the method of this application through the built-in in-vehicle module, in-vehicle module group, in-vehicle component, in-vehicle chip, or in-vehicle unit. The in-vehicle terminal device can be a vehicle device, in-vehicle module, vehicle, on-board unit (OBU), roadside unit (RSU), vehicle-mounted system (or in-vehicle sending unit) (telematics box, T-box), chip, or system on chip (SOC), etc. The above chip or SOC can be installed in a vehicle, OBU, RSU, or T-box.

[0085] In the embodiments of this application, the device for implementing the functions of the terminal device can be the terminal device itself or a device capable of supporting the terminal device to implement such functions, such as a chip system or a combined device or component that can implement the functions of the terminal device. This device can be installed in the terminal device. The embodiments of this application do not limit the specific technologies and specific device forms adopted by the terminal device.

[0086] 3GPP introduced device-to-device (D2D) technology in LTE Release 12 (R12). The communication link between D2Ds is called a D2D link. The D2D link can also be called a sidelink (SL), side link, or secondary link, etc. In the embodiments of this application, the D2D link, or side link or secondary link, all refer to the link established between devices of the same type, and their meanings are the same. The D2D link refers to the link established between devices of the same type. The so-called devices of the same type can be a link between terminal devices, a link between network devices, or a link between relay devices (Relay) to relay devices, etc. The embodiments of this application do not limit this. For ease of description, the following takes the technical solution provided in the embodiments of this application applied to SL as an example.

[0087] SL communication can be established between terminal devices, and the interfaces between terminal devices include proximity-based services communication 5 (PC5) interfaces. To expand the SL coverage or improve the system capacity, it is proposed to use relay devices to assist one terminal device in performing SL communication with another terminal device. The technology of using relay devices to assist one terminal device in performing SL communication with another terminal device is called user equipment-to-user equipment (UE-to-UE) relay (Relay) / U2U Relay.

[0088] Please refer to Figure 2 , which is a schematic diagram of the communication system of U2U Relay provided in the embodiments of this application. The communication system includes network devices (such as Figure 1 the network device 1 and network device 2 shown) and terminal devices (such as Figure 2 the source terminal device, relay terminal device, and target terminal device shown). Compared with relay devices, the source terminal device can also be referred to as a remote terminal device or a distal terminal device (remote UE). The relay terminal device can assist the source terminal device in communicating with the target terminal device, or the source terminal device and the target terminal device communicate through the relay terminal device to expand the communication range. For example, the relay terminal device can forward the information from the source terminal device to the target terminal device, and can also forward the information from the target terminal device to the source terminal device. It can be understood that the communication link between the source terminal device and the target terminal device includes the first sidelink between the source terminal device and the relay terminal device, and the second sidelink between the relay terminal device and the target terminal device. Or, the communication between the source terminal device and the target terminal device includes two hops (such as the first hop and the second hop), the first hop is the communication between the source terminal device and the relay terminal device, and the second hop is the communication between the relay terminal device and the target terminal device. Figure 2 The communication system shown is only schematic, and the number of terminal devices and / or network devices can be less or more.

[0089] The U2U relay technology supports the layer 2 (L2) protocol architecture. Please refer to Figure 3 , which is a schematic diagram of the L2 protocol stack in the U2U relay technology provided in the embodiments of this application.

[0090] As Figure 3As shown in the figure, in the L2 protocol architecture, the user plane data of the source terminal device is forwarded below the PDCP layer of the relay terminal device to the target terminal device, that is, the relay terminal device only maintains the RLC bearers of the relay terminal device, including the RLC layer, the MAC layer, and the PHY layer. Therefore, there is an end-to-end (E2E) PDCP layer between the source terminal device and the target terminal device, but there is no E2E RLC layer, MAC layer, and PHY layer. In addition, an adaptation protocol layer is added between the RLC layer and the PDCP layer. In U2Urelay, this adaptation protocol layer is also called the sidelink relay adaptation protocol (SRAP) layer. The main function of the SRAP layer is the multiplexing and demultiplexing of bearers. For example, the SRAP layer supports the multiplexing of data from different target terminal devices onto a single unicast connection between the source terminal device and the relay terminal device or the splitting of data on a single unicast connection onto different unicast connections; it also supports the multiplexing of data from different radio bearers (RBs) onto one RLC or the splitting of data on one RLC bearer onto different RBs, as well as distinguishing data from different source terminal devices.

[0091] To distinguish data from different target terminal devices multiplexed on the same unicast connection and data from different RBs multiplexed on the same RLC bearer, the source terminal device will carry its own local ID, the local ID of the target terminal device, and the BEARER ID in the adaptation layer header of the data packet to indicate which terminal device the data belongs to and which RB it belongs to. The local IDs of the source terminal device and the target terminal device can be assigned by the relay terminal device.

[0092] In the embodiments of the present application, the terminal device may be in the RRC idle state, the RRC inactive state, or the out-of-coverage (OoC) state. The terminal device in the RRC idle state or the RRC inactive state obtains the SL communication configuration from the system message broadcast by the network device. For example, the terminal device in the RRC idle state or the RRC inactive state may obtain the SL communication configuration from the system information block (SIB) 12. The SL communication configuration includes configuration parameters of protocol layers such as SDAP, PDCP, RLC, and MAC. In SIB12, the SDAP and PDCP related configurations are carried by the cell "SL-RadioBearerConfig", and the RLC / MAC related configurations are carried by the cell "SL-RLC-BearerConfig", as shown in Table 1. The terminal device in the OoC state may obtain the SL communication configuration from the cell "SL-PreconfigurationNR".

[0093] Table 1

[0094]

[0095] In this way, the process for the terminal device to obtain the SL communication configuration is as follows: The terminal device finds the corresponding SDAP configuration, PDCP configuration, and configuration index according to the quality of service (QoS) parameters, and then determines the corresponding RLC bearer configuration according to the configuration index, so as to obtain the sidelink radio bearer (SLRB) configuration. There are various QoS parameters, including but not limited to: guaranteed flow bit rate (GFBR), sidelink maximum flow bit rate (MFBR), QoS flow range (Range), pc5 QoS identifier (PQI), etc. Among them, PQI indicates the standardized PQI or non-standardized QoS parameters, and the non-standardized QoS parameters include but not limited to: resource type, priority, packet delay budget (PDB), packet error rate, average window, maximum data burst volume, etc. The above QoS parameters applied to SL are also called SL QoS parameters. For example, GFBR can be SL GFBR, MFBR can be SL MFBR, QoS flow range can be SL QoS flow range, and PQI can be SL PQI.

[0096] In the U2U relay scenario, the remote UE acting as the transmitting end (i.e., the Tx remote UE) can obtain the SDAP configuration and the PDCP configuration from the SIB according to the E2E QoS, and obtain the RLC configuration and / or the MAC configuration from the SIB according to the QoS corresponding to the end-to-end radio bearer on the corresponding link. Continuing with Figure 2 the example, the source terminal device can obtain the RLC configuration and / or the MAC configuration from the SIB according to the QoS corresponding to the radio bearer from the source terminal device to the target terminal device on the first hop. The relay UE can also obtain the RLC configuration and / or the MAC configuration from the SIB according to the QoS corresponding to the radio bearer on the second hop. The QoS corresponding to the radio bearer on the first hop and the QoS corresponding to the radio bearer on the second hop are collectively referred to as per-hop QoS. For the remote UE, per-hop QoS refers to the QoS corresponding to the radio bearer between the Tx remote UE and the Rx remote UE (i.e., the remote UE acting as the receiving end) on the first hop; for the relay UE, per-hop QoS refers to the QoS corresponding to the radio bearer between the Tx remote UE and the Rx remote UE on the second hop. Continuing with Figure 2 the example, the relay terminal device can obtain the RLC configuration and / or the MAC configuration from the SIB according to the QoS corresponding to the second hop (per-hop QoS). For example, the process for the remote UE and the relay UE to obtain the SL communication configuration is as Figure 4 shown. Figure 4 In the process shown, the remote UE is the Tx remote UE.

[0097] S401. The remote UE sends the E2E QoS of the QoS flow (i.e., the QoS parameters corresponding to the QoS flow) to the relay UE.

[0098] S402. The relay UE sends the PDB parameters of the first hop to the remote UE.

[0099] The relay UE splits the PDB parameters in the received QoS parameters to obtain the PDB parameters of the first hop and the PDB parameters of the second hop, and sends the split PDB parameters of the first hop to the remote UE. Among them, the other E2E QoS parameters remain unchanged.

[0100] S403. The remote UE obtains the E2E configuration from the SIB according to the E2E QoS.

[0101] The configuration includes SDAP configuration and / or PDCP configuration, and includes the mapping relationship between the flow and the data radio bearer (DRB).

[0102] S404. The remote UE aggregates the QoS parameters of the first hop corresponding to the QoS flows mapped to the same DRB into the QoS parameters of the first hop corresponding to the DRB.

[0103] The remote UE combines the PDB parameters of the first hop and other end-to-end (E2E) QoS parameters to obtain the QoS parameters of the first hop corresponding to the QoS flow. The QoS parameters of the first hop corresponding to the DRB can be obtained according to the mapping relationship between the flow and the DRB and the QoS parameters of the first hop corresponding to the QoS flow.

[0104] S405. The remote UE obtains the RLC configuration and / or MAC configuration of the first hop from the SIB according to the QoS parameters of the first hop corresponding to the DRB.

[0105] S406. The remote UE sends the mapping relationship between the flow and the DRB to the relay UE.

[0106] S407. The relay UE aggregates the QoS parameters of the second hop corresponding to the QoS flows mapped to the same DRB into the QoS parameters of the second hop corresponding to the DRB.

[0107] The relay UE combines the PDB parameters of the second hop and other E2E QoS parameters to obtain the QoS parameters of the second hop corresponding to the QoS flow. The relay UE can obtain the QoS parameters of the second hop corresponding to the DRB according to the mapping relationship between the flow and the DRB and the QoS parameters of the second hop corresponding to the QoS flow.

[0108] S408. The relay UE obtains the RLC configuration and / or MAC configuration of the second hop from the SIB according to the QoS parameters of the second hop corresponding to the DRB.

[0109] Based on Table 1, according to the Figure 4 idea, it is necessary to add the SLRB configuration corresponding to the QoS parameters per hop (such as the aforementioned first hop and second hop) on the basis of Table 1, as shown in Table 2. Table 2 takes the PDB corresponding to a QoS flow of the QoS parameters as an example. The configuration shown in Table 2 includes both the RLC configuration and the SDAP configuration and PDCP configuration. According to Figure 3It can be seen that for per-hop communication, only the RLC configuration and the configurations of the layers below RLC need to be obtained, and there is no need to obtain the SDAP configuration and the PDCP configuration. Therefore, the configurations shown in Table 2 will bring unnecessary additional signaling overhead. In addition, for the solution of obtaining Table 2 by following Table 1, without a related solution for the mapping relationship between the SLRB and the RLC channel, the terminal device needs to further process to obtain the mapping relationship between the SLRB and the RLC channel, with a relatively high complexity.

[0110] Table 2

[0111] Config index QoS(SDAP) PDCP RLC bearer 1 10ms PDCP#1 RLC#1 2 12ms PDCP#2 RLC#2 3 14ms PDCP#3 RLC#3 4 5ms PDCP#4 RLC#4 5 6ms PDCP#5 RLC#5 6 7ms PDCP#6 RLC#6

[0112] To solve the above technical problems, the solution of the embodiments of the present application is provided. On the one hand, the configuration of the U2U RLC channel can be added to the system message, and this configuration is associated with the per-hop QoS. Or, the configuration of the U2U radio bearer can be added to the system message, and this configuration is associated with the E2E QoS and the per-hop QoS. Compared with Table 2, the SDAP configuration and the PDCP configuration can be saved, thereby saving the overhead of the system message and saving resources. On the other hand, the SLRB can be associated with the RLC channel according to the per-hop QoS of the radio bearer. In this way, the terminal device can determine the complete SLRB configuration according to the E2E QoS and the per-hop QoS, thereby reducing the complexity of the terminal device to determine the mapping relationship between the SLRB and the RLC channel. The RLC channel configuration can also be understood as the RLC bearer configuration. The RLC channel configuration can include the RLC configuration and the MAC configuration, where the MAC configuration can also be understood as the logical channel configuration. Without special instructions, the two can be replaced.

[0113] In the embodiments of the present application, "when...", "if", and "in case" all refer to that the device will perform corresponding processing under a certain objective situation, which does not limit the time, and it is not required that the device must have a judgment action when implemented, nor does it mean that there are other limitations. Without special instructions, "if" and "in case" can be replaced, and "when..." can be replaced with "in the case of...". "When..." can be replaced with "if" / "in case". The association relationship can be replaced with the mapping relationship and the correspondence relationship. That XX is associated with YY can also be replaced with XX has a correspondence relationship with YY or XX has a mapping relationship with YY. In the embodiments of the present application, the QoS parameter is also simply referred to as QoS.

[0114] In the embodiments of the present application, unless otherwise specified, for the number of nouns, it means "singular noun or plural noun", that is, "one or more". "At least one" means one or more, and "multiple" means two or more. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally means that the associated objects before and after are in an "or" relationship. For example, A / B means: A or B. "At least one (item)" or its similar expression refers to any combination of these items, including any combination of single item (s) or plural item (s). For example, at least one (item) of a, b, or c means: a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, and c can be single or multiple.

[0115] In the embodiments of the present application, ordinal numbers such as "first" and "second" are used to distinguish multiple objects and are not used to limit the size, content, order, time sequence, priority, or importance of multiple objects. For example, the first sequence and the second sequence refer to two different sequences, and do not indicate differences in the content, priority, or importance of these two sequences. For a technical feature, the technical features in this technical feature are distinguished by "A", "B", "C", and "D", etc. There is no sequence or size order among the technical features described by this "A", "B", "C", and "D". For example, method A and method B in this article are only used to distinguish different methods, and do not limit the sequence, size order, priority, or importance between method A and method B.

[0116] The solutions provided in the embodiments of the present application will be introduced in detail below with reference to the accompanying drawings. In the following introduction, it is assumed that the communication method provided in the embodiments of the present application is applied to Figure 2 the network architecture shown as an example. The network architecture and application scenarios described in the embodiments of the present application are for more clearly explaining the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those of ordinary skill in the art can know that with the evolution of the network architecture and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

[0117] In the following, the communication method provided in the embodiments of the present application is taken as an example where it is executed by a terminal device and a network device. The terminal device can be a remote terminal device or a relay terminal device. For the convenience of description, in the following, it is taken as an example that the first terminal and the second terminal communicate through the third terminal, that is, the first terminal and the second terminal are remote terminal devices, and the third terminal is a relay terminal device. Taking Figure 2For example, the first terminal can be a source terminal device, the second terminal is a target terminal device, and the third terminal is a relay terminal device. The terminal devices in the following communication method 500 and communication method 600 can be the first terminal or the third terminal. The radio bearer between the first terminal and the second terminal is the first radio bearer. In the embodiments of the present application, the steps executed by the terminal device can be implemented by the terminal device itself or by components in the terminal device (such as a baseband chip, or other processing units or processors, etc.). For example, the terminal device can be Figure 2 the source terminal device in Figure 2 or can also be the chip (system) in the source terminal device in Figure 2 The steps executed by the network device can be implemented by the network device itself or by components in the network device (such as chips, processing units, or processors, etc.). For example, the network device can be Figure 2 the network device 1 shown in

[0118] Please refer to Figure 5 Figure 5 which is a schematic flowchart of the communication method 500 provided by the embodiments of the present application. Figure 5 This method is introduced from the perspective of the interaction between the first terminal and the network device. It should be understood that the communication method 500 can also be implemented by other devices, such as a chip or a communication device with communication functions. It should be noted that the embodiments of the present application only take the execution by the network device and the terminal device as an example, and are not limited to the network device and the terminal device. As Figure 5 shown, the process of the communication method 500 includes the following steps.

[0119] S501. The network device sends a system message, which includes first information for indicating the RLC configuration and / or the MAC configuration, and the first information is associated with QoS parameters.

[0120] ​The QoS parameter is the QoS parameter corresponding to the radio bearer between remote terminals. For example, the radio bearer is the radio bearer between a first remote terminal and a second remote terminal, and the first remote terminal and the second remote terminal communicate through a relay terminal. It should be noted that the first remote terminal and the second remote terminal do not specifically refer to which remote terminal. The network device can configure the RLC configuration and / or the MAC configuration, and associate the configuration with the QoS parameter to implement the configuration of the end-to-end radio bearer in the U2U Relay scenario. This can save the SDAP configuration and the PDCP configuration, thereby saving the overhead of system messages and saving resources. For example, the network device can broadcast a system message including first information, and the system message can include the first information for indicating the RLC configuration and / or the MAC configuration, and the first information is associated with the QoS parameter corresponding to the radio bearer between remote terminals. Correspondingly, the terminal device receives the system message. For example, the first terminal receives the system message, and the third terminal can also receive the system message. The RLC channel can also be understood as the RLC bearer.

[0121] The first information can directly indicate the RLC configuration and / or the MAC configuration, or can indirectly indicate the RLC configuration and / or the MAC configuration. For example, the first information can include the RLC configuration and / or the MAC configuration. The first information is associated with the QoS parameter, and it can also be understood that there is an association relationship between the QoS parameter and the RLC configuration and / or the MAC configuration. In one implementation, the first information includes a QoS parameter list, and the QoS parameter list includes the QoS parameter, indicating that the first information is associated with the QoS parameter. The QoS parameter list has an association relationship with the RLC channel. Optionally, the QoS parameter list indicates the QoS parameter mapped to the RLC channel. Method A can also be understood as that the system message configures the association relationship between the QoS parameter list and the RLC channel through the first information. The RLC channel can also be understood as the RLC bearer.

[0122] The embodiments of the present application do not limit the specific implementation manner of the association between the first information and the QoS parameter. The following lists several specific implementation manners of the association between the first information and the QoS parameter. In the following introduction, it is assumed that the system message is SIB12. SIB12 includes a first indication field, and the first indication field is used to carry the first information, or the first indication field indicates the first information. Among them, the first indication field can be a newly defined indication field or an already defined indication field.

[0123] Mode A: The first indication field is sl-U2U-RLC-ChannelConfigList, and sl-U2U-RLC-ChannelConfigList can indicate the first information. For example, sl-U2U-RLC-ChannelConfigList includes the first information. For example, the first information may be SL-RLC-ChannelConfig. The first information may include a second indication field that indicates a list of QoS parameters. The embodiments of the present application do not limit the specific name of the second indication field. For example, the second indication field is called sl-MappedQoS-SLRB-List, and the QoS parameter is SL-QoS-Profile.

[0124] As an implementation of Mode A, as shown in Table 3. Among them, Table 3 takes the first information multiplexing SL-RLC-ChannelConfig as an example.

[0125] Table 3

[0126]

[0127] Mode B: The first indication field can also be a newly defined indication field. For example, the first indication field can be called sl-U2U-RLC-ChannelConfigList and is used to indicate the first information. For example, the first information may be SL-U2U-RLC-ChannelConfig. The first information may include a second indication field that indicates a list of QoS parameters. The embodiments of the present application do not limit the specific name of the second indication field. For example, the second indication field is sl-MappedQoS-SLRB-List, and the QoS parameter is SL-QoS-Profile.

[0128] Optionally, the first information further includes an RLC configuration index / RLC channel identifier.

[0129] Optionally, the first information includes a first indication information, and the first indication information can indicate a default RLC channel. By indicating the default RLC channel, it can be avoided that the terminal device cannot find the RLC and / or MAC configuration corresponding to the per-hop QoS of the first radio bearer, thereby avoiding that the terminal device does not know which RLC channel to map the first radio bearer to.

[0130] As an example, if the first information includes the first indication information, then the first information indicates the default RLC channel. When the first information does not include the first indication information, the first information indicates that the RLC channel is not the default RLC channel.

[0131] As another example, the first information includes first indication information. The first indication information occupies at least one bit. The first value of the at least one bit is used to indicate the default RLC channel, and the second value of the at least one bit indicates that the RLC channel is not the default RLC channel.

[0132] As an implementation of Mode B, as shown in Table 4. Among them, Table 4 takes the first information as SL-U2U-RLC-ChannelConfig as an example.

[0133] Table 4

[0134]

[0135] According to Mode A or Mode B, the association relationship between the QoS parameters corresponding to the radio bearer and the RLC configuration and / or MAC configuration can be obtained, as shown in Table 5. Since the QoS parameters corresponding to the radio bearer have different PDB parameters compared with the E2E QoS parameters, Table 5 takes the PDB parameters as an example. In Table 5, RLC#* represents a set of RLC configuration parameters, and MAC#* represents a set of MAC configuration parameters. It can be understood that "*" is the number of the configuration parameters. Here, it is just an example, and there may be no such number in the specific implementation process. The present application does not make any limitations. Exemplarily, the RLC configuration parameters include parameters such as the RLC mode and the RLC sequence number length; the MAC configuration parameters include parameters such as the logical channel group and the logical channel priority.

[0136] Table 5

[0137]

[0138] Compared with Table 2, Table 5 does not include the SDAP configuration and the PDCP configuration. Therefore, the configuration shown in Table 5 will reduce the signaling overhead of the SL communication configuration.

[0139] S502. The terminal device determines the association relationship between the first radio bearer and the RLC configuration and / or MAC configuration according to the first information and the first QoS parameter.

[0140] The first radio bearer is the radio bearer between the first terminal and the second terminal. When the terminal device is the first terminal, the first QoS parameter is the QoS parameter corresponding to the first radio bearer on the first link, and the first link is the link between the first terminal and the third terminal. When the terminal device is the third terminal, the first QoS parameter is the QoS parameter corresponding to the first radio bearer on the second link, and the second link is the link between the third terminal and the second terminal. Alternatively, when the terminal device is the first terminal, the first QoS parameter is the QoS parameter corresponding to the first hop between the first terminal and the second terminal for the first radio bearer; when the terminal device is the third terminal, the first QoS parameter is the QoS parameter corresponding to the second hop between the first terminal and the second terminal for the first radio bearer. Depending on the terminal device, the terminal device determines the association relationship between the first radio bearer and the RLC configuration and / or MAC configuration according to the first information and the first QoS parameter, which is also different. First, an example where the terminal device is the first terminal will be described.

[0141] The first terminal can determine the association relationship between the first radio bearer and the RLC configuration and / or MAC configuration according to the first information and the first QoS parameter, so as to determine the SL communication configuration. The determination of the association relationship between the first radio bearer and the RLC configuration and / or MAC configuration can also be understood as determining the association relationship between the PDCP configuration corresponding to the first radio bearer and the RLC configuration and / or MAC configuration.

[0142] For example, the first terminal can determine the E2E SDAP configuration and PDCP configuration according to the E2E QoS parameter, and then determine the RLC configuration and / or MAC configuration according to the first information and the first QoS parameter, so as to associate the first radio bearer with the RLC configuration and / or MAC configuration according to the first QoS parameter. For example, the first terminal can determine the SDAP configuration and PDCP configuration according to the second QoS parameter, where the second QoS parameter is the end-to-end QoS parameter between the first terminal and the second terminal; then determine the first radio bearer according to the SDAP configuration and PDCP configuration, and determine the first QoS parameter according to the SDAP configuration, so as to determine the RLC configuration and / or MAC configuration according to the first QoS parameter. The first QoS parameter is the same as the QoS parameter in the first information, so as to determine that the RLC configuration and / or MAC configuration is the RLC configuration and / or MAC configuration associated with the QoS parameter in the first information.

[0143] Please refer to Table 6, which shows the configuration relationship of SIB12 indicating the SL communication configuration in the prior art. The QoS parameter in Table 6 is the E2E QoS parameter, which can be used to determine the E2E configuration. Table 6 takes the QoS parameter as PDB as an example.

[0144] Table 6

[0145] Config index E2E QoS(SDAP) PDCP RLC bearer 1 10ms PDCP#1 RLC#1,LCH#1 2 12ms,13ms PDCP#2 RLC#2,LCH#2 3 14ms,15ms PDCP#3 RLC#3,LCH#3 n Default PDCP#n RLC#n,LCH#n

[0146] The first terminal determines the E2E configuration according to the E2E QoS parameters, which actually means finding the SDAP and PDCP configurations corresponding to the E2E QoS parameters in Table 6. Although Table 6 includes RLC configurations and / or MAC configurations (i.e., RLC bearers in Table 6), the first terminal ignores the RLC configurations and / or MAC configurations, but determines the SDAP configuration (i.e., the mapping relationship between QoS flows and radio bearers) and the PDCP configuration, and determines the per-hop QoS parameters (e.g., the first QoS parameter) corresponding to the first radio bearer according to the SDAP configuration, and then finds the RLC configuration and / or MAC configuration corresponding to the per-hop QoS parameter from Table 2 according to the per-hop QoS parameter. In this way, the first terminal can associate the per-hop QoS parameters with the E2E configuration and the per-hop configuration (the RLC configuration and / or MAC configuration corresponding to the first radio bearer).

[0147] For example, assume that the first terminal has 3 QoS flows, which are flow#1, flow#2, and flow#3, and the corresponding E2E QoSs of these 3 QoS flows are QoS#1, QoS#2, and QoS#3 in sequence. One QoS flow corresponds to one E2E QoS. For example, flow#1 corresponds to QoS#1, flow#2 corresponds to QoS#2, and flow#3 corresponds to QoS#3. The QoS parameters corresponding to these 3 QoS flows on the first link are QoS#4, QoS#5, and QoS#6 in sequence.

[0148] In this case, the first terminal can determine the E2E SDAP configuration and PDCP configuration according to the E2E QoSs of these 3 QoS flows. For example, flow#1 and flow#2 are mapped to DRB#1, and flow#3 is mapped to DRB#2. The first terminal can aggregate QoS#4 and QoS#5 into QoS#7 as the QoS corresponding to DRB#1, and then determine the RLC configuration and / or MAC configuration according to the QoS#7 corresponding to DRB#1 and the QoS#6 corresponding to DRB#2. For example, the first terminal determines that the RLC configurations are RLC#1 and RLC#2 (e.g., DRB#1 corresponds to RLC#1, and DRB#2 corresponds to RLC#2); or for another example, the first terminal determines that the RLC configuration is RLC#3 (e.g., DRB#1 and DRB#2 correspond to RLC#3). In this way, the first terminal associates the E2E PDCP configuration with the per-hop RLC configuration.

[0149] It should be noted that the embodiments of the present application do not limit the specific implementation manner in which the first terminal aggregates QoS#4 and QoS#5 into QoS#7, which depends on the first terminal. For example, the first terminal may use the smaller value of PDB in QoS#4 and QoS#5 as the PDB corresponding to DRB#1.

[0150] When the terminal device is the third terminal and the third terminal does not know the SDAP configuration, the first terminal may send the SDAP configuration to the third terminal. Thus, the third terminal determines the first QoS parameter according to the SDAP configuration, and then determines the RLC configuration and / or MAC configuration according to the first QoS parameter. It can also be understood that the third terminal determines the per-hop QoS corresponding to the first radio bearer according to the mapping relationship between the QoS flow and the radio bearer, and then finds the RLC configuration and / or MAC configuration corresponding to the per-hop QoS parameter from Table 2 according to the per-hop QoS parameter. In this way, the first terminal can associate the per-hop QoS parameter with the E2E configuration and the per-hop configuration (the RLC configuration and / or MAC configuration corresponding to the first radio bearer). Since the first QoS parameter of the third terminal is the same as the QoS parameter in the first information, the RLC configuration and / or MAC configuration is determined to be the RLC configuration and / or MAC configuration associated with the QoS parameter in the first information.

[0151] For example, assume that the first terminal has 3 QoS flows, which are flow#1, flow#2, and flow#3, and the second-hop QoS corresponding to these 3 QoS flows is QoS#8, QoS#9, and QoS#10 in sequence. Among them, the SDAP configuration indicates that flow#1 and flow#2 are mapped to DRB#1, and flow#3 is mapped to DRB#2.

[0152] In this case, the third terminal may aggregate QoS#8 and QoS#9 into QoS#11 as the QoS corresponding to DRB#1, and then determine the RLC configuration and / or MAC configuration according to the QoS#11 corresponding to DRB#1 and the QoS#12 corresponding to DRB#2. For example, the first terminal determines the RLC configuration to be RLC#4 and RLC#5 (for example, DRB#1 corresponds to RLC#4, and DRB#2 corresponds to RLC#5); for another example. The first terminal determines the RLC configuration to be RLC#6 (for example, DRB#1 and DRB#2 correspond to RLC#6). In this way, the third terminal associates the E2E DRB with the per-hop RLC configuration.

[0153] The above communication method 500 can reduce the signaling overhead of the SL communication configuration by configuring the association relationship between the QoS parameter corresponding to the radio bearer and the RLC configuration and / or MAC configuration.

[0154] It should be noted that the communication method 500 can be applied to a terminal device in the RRC idle state, can also be applied to a terminal device in the RRC inactive state, and can also be applied to a terminal device in the OoC state. In the above communication method 500, taking the terminal device in the RRC idle state and the RRC inactive state as an example, when the terminal device is in the OoC state, the system message / SIB12 in the communication method 500 can be replaced with "SL-PreconfigurationNR". It can be understood that a terminal device in the OoC state obtains the SL communication configuration from "SL-PreconfigurationNR". The design of "SL-PreconfigurationNR" can refer to the design of the foregoing SIB12, which will not be elaborated here.

[0155] An embodiment of the present application also provides a communication method 600. The communication method 600 can configure the SL communication configuration, and this configuration is associated with the QoS parameters of the E2E and the per-hop QoS parameters, so that the terminal device can associate the radio bearer with the RLC channel according to the per-hop QoS corresponding to the radio bearer. In this way, the terminal device can determine all the SL communication configurations according to the E2E QoS and the per-hop QoS, thereby reducing the complexity of determining the mapping relationship between the SL communication and the RLC channel.

[0156] Please refer to Figure 6 , Figure 6 which is a schematic flowchart of the communication method 600 provided by the embodiment of the present application. Figure 6 This method is introduced from the perspective of the interaction between the first terminal and the network device. It should be understood that the communication method 600 can also be implemented by other devices, for example, executed by a chip or a communication device with communication functions. It should be noted that the embodiment of the present application only takes the execution by the network device and the first terminal as an example, and is not limited to the network device and the first terminal. As Figure 6 shown, the process of the communication method 600 includes the following steps.

[0157] S601. The network device sends a system message, and the system message includes second information, which is used to indicate the SDAP configuration and / or the PDCP configuration, and the second information is associated with the QoS parameters, and the QoS parameters are the QoS parameters corresponding to the radio bearer.

[0158] The QoS parameter is a QoS parameter corresponding to a radio bearer between remote terminals. For example, the radio bearer is a radio bearer between a first remote terminal and a second remote terminal, and the first remote terminal and the second remote terminal communicate through a relay terminal. It should be noted that the first remote terminal and the second remote terminal do not specifically refer to a certain remote terminal. The network device can configure the SL communication configuration and associate the configuration with the E2E QoS parameter and the per-hop QoS parameter to reduce the complexity of the terminal device determining the mapping relationship between the SL communication and the RLC channel. For example, the network device can broadcast a system message including second information, and the system message can include the second information for indicating the SDAP configuration and / or the PDCP configuration. The second information is associated with the QoS parameter corresponding to the radio bearer between remote terminals. Accordingly, the terminal device receives the system message. For example, the first terminal receives the system message, and the third terminal can also receive the system message.

[0159] In one implementation, the second information includes a QoS parameter list, and the QoS parameter list includes QoS parameters, indicating that the second information is associated with the QoS parameter.

[0160] Optionally, the QoS parameter list indicates the QoS parameter mapped to the RLC channel corresponding to the radio bearer.

[0161] The embodiments of the present application do not limit the specific implementation manner of associating the second information with the QoS parameter. Hereinafter, several specific implementation manners of associating the second information with the QoS parameter are listed. In the following introduction, it is assumed that the system message is SIB12. SIB12 includes a first indication field, which is used to carry the second information, or the first indication field indicates the second information. Among them, the first indication field can be a newly defined indication field or an already defined indication field.

[0162] In Mode C, the first indication field can be sl-RadioBearerConfigList, and sl-RadioBearerConfigList can indicate the second information. For example, sl-RadioBearerConfigList includes the second information. For example, the second information can be SL-RadioBearerConfig. The second information can include a second indication field, and the second indication field indicates the QoS parameter list. The embodiments of the present application do not limit the specific name of the second indication field. For example, the second indication field is called sl-MappedQoS-SLRB-List, and the QoS parameter is SL-QoS-Profile.

[0163] As an implementation of Mode C, as shown in Table 7. Among them, Table 7 takes the second information multiplexing SL-RadioBearerConfig as an example.

[0164] Table 7

[0165]

[0166] In Mode D, the first indication field can also be a newly defined indication field. For example, the first indication field is called sl-U2U-RadioBearerConfigList, and sl-U2U-RadioBearerConfigList can indicate the second information. For example, the second information can be SL-U2U-RadioBearerConfig, and the second information includes a second indication field that indicates a list of QoS parameters. The embodiments of the present application do not limit the specific name of the second indication field. For example, the second indication field is called sl-MappedQoS-SLRB-List, and the QoS parameter is SL-QoS-Profile.

[0167] As an implementation of Mode D, as shown in Table 8, where Table 8 takes the second information as SL-U2U-RadioBearerConfig as an example.

[0168] Table 8

[0169]

[0170] The SDAP configuration and the PDCP configuration associated with the per-hop QoS parameters can be obtained through the second information, as shown in Table 9. Since the QoS parameters corresponding to the radio bearer have different PDB parameters compared with the E2E QoS parameters, Table 9 takes the PDB parameters as an example. RLC#* represents a set of RLC configuration parameters, and MAC#* represents a set of MAC configuration parameters. It can be understood that "*" is the number of the configuration parameter. Here, it is just an example, and there may be no such number in the specific implementation process. The present application does not make any limitations. Exemplarily, the RLC configuration parameters include parameters such as the RLC mode and the RLC sequence number length; the MAC configuration parameters include parameters such as the logical channel group and the logical channel priority.

[0171] Table 9

[0172] Config index E2E QoS(SDAP) Per-hop QoS PDCP RLC bearer 1 10ms 5ms PDCP#1 RLC#1,MAC#1 2 10ms 6ms PDCP#1 RLC#2,MAC#2 3 10ms 7ms,8ms PDCP#1 RLC#3,MAC#3 4 12ms,13ms 5ms PDCP#2 RLC#1,MAC#1 5 12ms,13ms 6ms PDCP#2 RLC#2,MAC#2 6 12ms,13ms 7ms,8ms PDCP#2 RLC#3,MAC#3

[0173] Table 9 shows the association relationship between the SDAP configuration and the PDCP configuration and the per-hop QoS parameters, so as to determine all radio bearer configurations according to the E2E QoS and the per-hop QoS, which can avoid calculating the mapping relationship between the radio bearer and the RLC channel and reduce the processing complexity.

[0174] S602. The terminal device determines the configuration of the first radio bearer according to the second information and the first QoS parameter.

[0175] The first radio bearer is the radio bearer between the first terminal and the second terminal. When the terminal device is the first terminal, the first QoS parameter is the QoS parameter corresponding to the first radio bearer on the first link. When the terminal device is the third terminal, the first QoS parameter is the QoS parameter corresponding to the first radio bearer on the second link. Depending on the terminal device, the terminal device determines the association relationship between the first radio bearer and the RLC configuration and / or MAC configuration according to the first information and the first QoS parameter, which is also different. First, an example where the terminal device is the first terminal will be described.

[0176] For example, the first terminal can find the SDAP configuration and PDCP configuration corresponding to the E2E QoS parameter in Table 4 according to the E2E QoS parameter, and then determine the per-hop QoS of the first radio bearer (i.e., the first QoS parameter) according to the SDAP configuration (i.e., the mapping relationship between the QoS flow and the radio bearer), and determine the configuration index (configindex) according to the E2E QoS parameter and the per-hop QoS, so as to find the config index corresponding to the E2E QoS parameter and the per-hop QoS parameter in Table 4. The first terminal can use the RLC configuration and / or MAC configuration corresponding to the config index in Table 4, as well as the SDAP configuration and PDCP configuration, as the configuration of the first radio bearer.

[0177] For the third terminal, the first terminal can send the SDAP configuration to the third terminal. The third terminal determines the per-hop QoS of the first radio bearer according to the SDAP configuration, and determines the RLC configuration and / or MAC configuration according to the per-hop QoS. In this way, the third terminal associates the DRB with the RLC channel. For example, the third terminal determines QoS#1 corresponding to DRB#1 and QoS#2 corresponding to DRB#2, and determines the RLC configuration and / or MAC configuration according to QoS#1 and QoS#2. For example, the third terminal determines that the RLC configuration is RLC#1 and RLC#2 (for example, DRB#1 corresponds to RLC#1 and DRB#2 corresponds to RLC#2); for another example, the third terminal determines that the RLC configuration is RLC#3 (for example, DRB#1 and DRB#2 correspond to RLC#3). In this way, the third terminal associates the E2E QoS with the RLC configuration of the per-hop QoS.

[0178] It can be understood that the per-hop QoS parameter may correspond to multiple sets of RLC configurations and / or MAC configurations, but each set of RLC configurations and / or MAC configurations is the same. In this case, the third terminal can arbitrarily select a set of RLC configurations and / or MAC configurations from these multiple sets of RLC configurations and / or MAC configurations.

[0179] It should be noted that the communication method 600 can be applied to a terminal device in the RRC idle state, can also be applied to a terminal device in the RRC inactive state, and can also be applied to a terminal device in the OoC state. In the above communication method 600, taking the terminal device in the RRC idle state and the RRC inactive state as an example, when the terminal device is in the OoC state, the system message / SIB12 in the communication method 600 can be replaced with "SL-PreconfigurationNR". It can be understood that a terminal device in the OoC state obtains the SL communication configuration from "SL-PreconfigurationNR". The design of "SL-PreconfigurationNR" can refer to the design of the foregoing SIB12, which will not be elaborated here.

[0180] The embodiment of the present application also provides a communication method 700. Through the communication method 700, the SL communication configuration can also be configured, and this configuration is associated with the E2E QoS parameter and the per-hop QoS parameter. Thus, the terminal device can associate the radio bearer with the RLC channel according to the per-hop QoS corresponding to the radio bearer, thereby reducing the complexity of the terminal device determining the mapping relationship between the SL communication and the RLC channel. In addition, the communication method 700 can also save signaling overhead.

[0181] Please refer to Figure 7 , Figure 7 which is a schematic flowchart of the communication method 700 provided by the embodiment of the present application. Figure 6 This method is introduced from the perspective of the interaction between the first terminal and the network device. It should be understood that the communication method 700 can also be implemented by other devices, for example, executed by a chip or a communication device with communication functions. It should be noted that the embodiment of the present application only takes the execution by the network device and the first terminal as an example, and is not limited to the network device and the first terminal. As Figure 7 shown, the process of the communication method 700 includes the following steps.

[0182] S701. The network device sends a system message, and the system message includes second information, where the second information is used to indicate the SDAP configuration and / or the PDCP configuration, and the second information is associated with the RLC configuration. Correspondingly, the terminal device receives the system message.

[0183] The second information may include second indication information, which may be used to indicate the RLC channel associated with the radio bearer. For example, the second indication information may include or indicate the mapping relationship between the E2E configuration and the RLC channel. Embodiments of the present application do not limit the specific implementation manners of the second information and the second indication information. Several specific implementation manners of the second information and the second indication information are listed below. In the following introduction, it is assumed that the system message is SIB12. SIB12 includes a first indication field, which is used to carry the second information, or the first indication field indicates the second information. The first indication field may be a newly defined indication field or an already defined indication field. The second information may include a second indication field, which is used to carry the second indication information, or the second indication field indicates the second indication information. The second indication field may be a newly defined indication field or an already defined indication field.

[0184] Method E: The first indication field may be sl-RadioBearerConfigList, and sl-RadioBearerConfigList may indicate the second information. For example, sl-RadioBearerConfigList includes the second information. The second information may be SL-RadioBearerConfig. Embodiments of the present application do not limit the specific name of the second indication field. For example, the second indication field is called sl-MappingConfigList, and sl-MappingConfigList indicates the mapping relationship between the E2E configuration and the RLC channel.

[0185] As an implementation of Method E, as shown in Table 10. Table 10 takes the multiplexing of the second information with SL-RadioBearerConfig as an example.

[0186] Table 10

[0187]

[0188] Method F: The first indication field may also be a newly defined indication field. For example, the first indication field may be called sl-U2U-RadioBearerConfigList, and sl-U2U-RadioBearerConfigList may indicate the second information. For example, sl-RadioBearerConfigList includes the second information. The second information may be SL-U2U-RadioBearerConfig. Embodiments of the present application do not limit the specific name of the second indication field. For example, the second indication field is called sl-MappingConfigList, and sl-MappingConfigList indicates the mapping relationship between the E2E configuration and the RLC channel.

[0189] As an implementation of Mode E, as shown in Table 11. Among them, Table 11 takes the second information as SL-U2U-RadioBearerConfig as an example.

[0190] Table 11

[0191]

[0192] Optionally, the second indication information is further used to indicate the default RLC channel. For the default RLC channel, the mapping relationship indicated by the second indication information may include predefined values, and the values indicate the default RLC channel. Alternatively, the second indication information does not carry a mapping relationship.

[0193] Based on the second indication information, the configuration relationships shown in Table 12 and Table 13 can be obtained. Since the QoS parameters corresponding to the DRB have different PDB parameters compared with the E2E QoS parameters, Table 12 and Table 13 take the PDB parameters as examples. RLC#* represents a set of RLC configuration parameters, and MAC#* represents a set of MAC configuration parameters. It can be understood that "*" is the number of the configuration parameters. Here, it is just an example, and there may be no such number in the specific implementation process, and the present application does not make a limitation. Exemplarily, the RLC configuration parameters include parameters such as the RLC mode and the RLC sequence number length; the MAC configuration parameters include parameters such as the logical channel group and the logical channel priority. In Table 12, the mapping parameter is used as an example of the second indication information.

[0194] Table 12

[0195]

[0196] Table 13

[0197] ID or index Per-hop QoS parameter RLC channel 1 5ms RLC#1,MAC#1 2 6ms RLC#2,MAC#2 3 7ms,8ms RLC#3,MAC#3 n Default RLC#n,MAC#n

[0198] By comparing Table 9 with Table 12 and Table 13, it can be found that Table 9 enumerates the combinations of E2E QoS and per-hop QoS, which has duplicate configurations, so the signaling overhead is large. Relatively speaking, Table 12 and Table 13 can reduce the signaling overhead.

[0199] S702. The terminal device determines the configuration of the first radio bearer according to the second information and the first QoS parameter.

[0200] The first radio bearer is the radio bearer between the first terminal and the second terminal. When the terminal device is the first terminal, the first QoS parameter is the QoS parameter corresponding to the first radio bearer on the first link. When the terminal device is the third terminal, the first QoS parameter is the QoS parameter corresponding to the first radio bearer on the second link. Depending on the terminal device, the terminal device determines the association relationship between the first radio bearer and the RLC configuration and / or MAC configuration according to the first information and the first QoS parameter, which also varies. First, an example where the terminal device is the first terminal will be described.

[0201] For example, the first terminal can determine the E2E configuration according to the E2E QoS parameter, that is, the first terminal determines the SDAP configuration, PDCP configuration, and mapping configuration (i.e., Mapping in Table 12) corresponding to the E2E QoS parameter in Table 12 according to the E2E QoS parameter. Then, the first terminal determines the per-hop QoS corresponding to the first radio bearer according to the SDAP configuration (i.e., the mapping relationship between the QoS flow and the radio bearer). The first terminal also determines the RLC channel corresponding to the first radio bearer according to the mapping configuration, that is, the first terminal looks up the RLC channel corresponding to the ID or index in Table 13, and then determines the corresponding RLC channel according to the per-hop QoS parameter (i.e., looks up the RLC channel that matches the per-hop QoS parameter among the RLC channels corresponding to the ID or index in Table 13).

[0202] For the third terminal, the first terminal can send the SDAP configuration to the third terminal. The third terminal can determine the per-hop QoS corresponding to the first radio bearer according to the SDAP configuration (i.e., the mapping relationship between the QoS flow and the radio bearer), and then determine the RLC configuration and / or MAC configuration according to the per-hop QoS, that is, find the RLC configuration and / or MAC configuration corresponding to the per-hop QoS parameter in Table 13, so that the third terminal associates the first radio bearer with the RLC channel.

[0203] In communication method 700, the system message may also include the first information. For the specific implementation of the first information, reference can be made to the foregoing communication method 500, which will not be elaborated here. Communication method 700 indicates the RLC channel associated with the radio bearer, so that the terminal can associate the radio bearer with the RLC channel according to the per-hop QoS corresponding to the radio bearer, which can reduce the complexity of the terminal device determining the mapping relationship between the SL communication and the RLC channel.

[0204] It should be noted that the communication method 700 can be applicable to a terminal device in the RRC idle state, can also be applicable to a terminal device in the RRC inactive state, and can also be applicable to a terminal device in the OoC state. In the above communication method 700, taking the terminal device in the RRC idle state and the RRC inactive state as an example, when the terminal device is in the OoC state, the system message / SIB12 in the communication method 700 can be replaced with "SL-PreconfigurationNR". It can be understood that a terminal device in the OoC state obtains the SL communication configuration from "SL-PreconfigurationNR". The design of "SL-PreconfigurationNR" can refer to the design of the aforementioned SIB12, which will not be elaborated here.

[0205] In the above embodiments provided by the present application, the method provided by the embodiments of the present application is introduced by taking the execution of a network device and a first terminal as an example. In the present application, each embodiment can be implemented independently or implemented in combination based on certain internal connections; in each embodiment, different implementation manners can be implemented in combination or independently. To implement each function in the method provided by the above embodiments of the present application, the steps executed by the first terminal can be implemented by different functional entities constituting the terminal device. The steps executed by the network device can be implemented by different functional entities constituting the network device. For example, the network device can be a CU-DU architecture, the CU can generate system messages, and the DU can send system messages. To implement each function in the method provided by the above embodiments of the present application, the terminal device and the network device can include a hardware structure and / or a software module, and implement the above functions in the form of a hardware structure, a software module, or a combination of a hardware structure and a software module. Whether a certain function among the above functions is executed in the form of a hardware structure, a software module, or a combination of a hardware structure and a software module depends on the specific application and design constraints of the technical solution.

[0206] Based on the same inventive concept as the method embodiment, an embodiment of the present application provides a communication device. The communication device used to implement the above method in the embodiments of the present application is introduced below with reference to the drawings. The content in the above can all be used in the subsequent embodiments, and the repeated content will not be elaborated.

[0207] Figure 8 It is a schematic block diagram of the communication device 800 provided by the embodiment of the present application. The communication device 800 can be the terminal device or the network device in the above embodiments. For example, the communication device 800 can be Figure 2 the terminal device therein; or, the communication device 800 is a chip (system) in the terminal device; or, the communication device 800 is a software module of the terminal device. The communication device 800 can correspondingly implement the functions or steps implemented by the terminal device in each of the above method embodiments. Another example is that the communication device 800 can beFigure 2 The network device in [the above]; or, the communication device 800 is a chip (system) in the network device; or, the communication device 800 is a software module of the network device. The communication device 800 can correspondingly implement the functions or steps implemented by the network device in the above various method embodiments. The communication device 800 can include a processing module 810 and a transceiver module 820. Optionally, it can further include a storage module, and the storage module can be used to store instructions (codes or programs) and / or data. The storage module can be, for example, a memory. The processing module 810 and the transceiver module 820 can be coupled to the storage module. For example, the processing module 810 can read the instructions (codes or programs) and / or data in the storage module to implement the corresponding method. When the communication device 800 is a chip in the terminal device or the network device, the storage module can be the storage module inside the chip, such as registers, caches, etc. For example, the storage module can also be the storage module outside the chip in the terminal device or the network device, such as a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM), etc. The above various units can be set independently, or partially or fully integrated.

[0208] The processing module 810 can be a processor or a controller. For example, it can be a general central processing unit (CPU), a general processor, a digital signal processing (DSP), an application specific integrated circuits (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in combination with the disclosure of this application. The processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The transceiver module 820 is a transceiver, an interface circuit, a bus, a pin or other possible communication interfaces, and is used to receive signals from other devices. For example, when the device is implemented in the form of a chip, the transceiver module 820 is the interface circuit of the chip for receiving signals from other chips or devices, or is the interface circuit of the chip for sending signals to other chips or devices.

[0209] In one implementation, the communication device 800 can correspondingly implement the behaviors and functions of the terminal device in the above method embodiments. The communication device 800 can be a terminal device, or a component applied to the terminal device (such as a chip or a circuit), or a part of the chip or chipset or chip in the terminal device for executing relevant method functions, or a software module that can implement the method executed by the terminal device in the above method (such as communication method 500 or communication method 600), without limitation. For specific reference, please refer to the relevant content of the foregoing method embodiments, which will not be elaborated here.

[0210] For example, the transceiver module 820 is used to receive a system message, the system message includes first information, the first information is used to indicate the RLC configuration and / or the MAC configuration, and the first information is associated with the QoS parameter. The QoS parameter is the QoS parameter corresponding to the radio bearer, the radio bearer is the radio bearer between the first remote terminal and the second remote terminal, and the first remote terminal and the second remote terminal communicate through a relay terminal. The processing module 810 is used to determine the association relationship between the first radio bearer and the RLC configuration and / or the MAC configuration according to the first information and the first QoS parameter.

[0211] As an alternative implementation, the communication device 800 is the first terminal, the first radio bearer is the radio bearer between the first terminal and the second terminal, and the first terminal and the second terminal communicate through the third terminal. The first QoS parameter is the QoS parameter corresponding to the first radio bearer on the first link, and the first link is the link between the first terminal and the third terminal.

[0212] As an alternative implementation, the communication device 800 is the third terminal, the first radio bearer is the radio bearer between the first terminal and the second terminal, and the first terminal and the second terminal communicate through the third terminal. The first QoS parameter is the QoS parameter corresponding to the first radio bearer on the second link, and the second link is the link between the third terminal and the second terminal.

[0213] As an alternative implementation, the first information is used to indicate the RLC configuration and / or the MAC configuration, including: the first information includes the RLC configuration and / or the MAC configuration.

[0214] As an alternative implementation, the first information is associated with the QoS parameter, including: the first information includes a QoS parameter list, the QoS parameter list includes the QoS parameter, and the QoS parameter list has an association relationship with the RLC channel.

[0215] As an alternative implementation, the QoS parameter list indicates the QoS parameter mapped to the RLC channel.

[0216] As an alternative implementation, the first information further includes an RLC configuration index or an RLC channel identifier.

[0217] As an alternative implementation, the first information includes first indication information for indicating a default RLC channel.

[0218] As an alternative implementation, the communication device 800 is a first terminal. The processing module 810 is specifically configured to determine the first QoS parameter according to the SDAP configuration, and determine the RLC configuration and / or the MAC configuration according to the first QoS parameter, where the SDAP configuration is determined according to a second QoS parameter, and the second QoS parameter is an end-to-end QoS parameter between the first terminal and the second terminal.

[0219] As an alternative implementation, the communication device 800 is a first terminal. The transceiver module 820 is further configured to receive the SDAP configuration from the first terminal. The processing module 810 is specifically configured to determine the first QoS parameter according to the SDAP configuration, and determine the RLC configuration and / or the MAC configuration according to the first QoS parameter.

[0220] For another example, the transceiver module 820 is configured to receive a system message, where the system message includes second information for indicating the SDAP configuration and / or the PDCP configuration; where the second information is associated with a QoS parameter, the QoS parameter is a QoS parameter corresponding to a radio bearer, and the radio bearer is a radio bearer between a first remote terminal and a second remote terminal, and the first remote terminal and the second remote terminal communicate through a relay terminal; or the second information is associated with an RLC configuration. The processing module 810 is configured to determine the configuration of the first radio bearer according to the second information and the first QoS parameter.

[0221] As an alternative implementation, the communication device 800 is a first terminal, the first radio bearer is a radio bearer between the first terminal and the second terminal, and the first terminal and the second terminal communicate through a third terminal. The first QoS parameter is a QoS parameter corresponding to the first radio bearer on a first link, and the first link is a link between the first terminal and the third terminal.

[0222] As an alternative implementation, the communication device 800 is a third terminal, the first radio bearer is a radio bearer between the first terminal and the second terminal, and the first terminal and the second terminal communicate through a third terminal. The first QoS parameter is a QoS parameter corresponding to the first radio bearer on a second link, and the second link is a link between the third terminal and the second terminal.

[0223] As an alternative implementation, the second information for indicating the SDAP configuration and / or the PDCP configuration includes: the second information includes the SDAP configuration and / or the PDCP configuration.

[0224] As an alternative implementation, the second information is associated with QoS parameters and includes: the second information includes a QoS parameter list, and the QoS parameter list includes the QoS parameters.

[0225] As an alternative implementation, the second information is associated with RLC configuration and includes: the second information includes second indication information, and the second indication information is used to indicate an RLC channel associated with a radio bearer.

[0226] As an alternative implementation, the system message further includes first information, and the first information is used to indicate RLC configuration and / or configuration. The first information is associated with the QoS parameters.

[0227] As an alternative implementation, the first information is associated with QoS parameters and includes: the first information includes a QoS parameter list, the QoS parameter list includes the QoS parameters, and the QoS parameter list has an association relationship with the RLC channel.

[0228] As an alternative implementation, the first information includes first indication information, and the first indication information is used to indicate a default RLC channel.

[0229] As an alternative implementation, the second indication information is further used to indicate a default RLC channel.

[0230] In one implementation, the communication device 800 can correspondingly implement the behaviors and functions of the network device in the above method embodiments. The communication device 800 can be a network device, or a component applied to the network device (such as a chip or a circuit), or a part of a chip or a chipset or a chip in the network device for executing relevant method functions, or a software module capable of implementing the method executed by the network device in the above method (such as communication method 500 or communication method 600), without limitation. For details, reference can be made to the relevant content of the foregoing method embodiments, which will not be elaborated here.

[0231] For example, the processing module 810 is used to determine the system message, and the transceiver module 820 is used to broadcast the system message. Among them, the system message includes first information, and the first information is used to indicate RLC configuration and / or MAC configuration, and the first information is associated with QoS parameters. The QoS parameters are QoS parameters corresponding to a radio bearer, and the radio bearer is a radio bearer between a first remote terminal and a second remote terminal. The first remote terminal and the second remote terminal communicate through a relay terminal.

[0232] As an alternative implementation, the first information is used to indicate RLC configuration and / or MAC configuration and includes: the first information includes RLC configuration and / or MAC configuration.

[0233] As an optional implementation, the first information is associated with QoS parameters, including: the first information includes a QoS parameter list, the QoS parameter list includes the QoS parameters, and the QoS parameter list has an association relationship with the RLC channel.

[0234] As an optional implementation, the QoS parameter list indicates the QoS parameters mapped to the RLC channel.

[0235] As an optional implementation, the first information further includes an RLC configuration index or an RLC channel identifier.

[0236] As an optional implementation, the first information includes first indication information for indicating a default RLC channel.

[0237] For another example, the processing module 810 is used to determine system information, and the transceiver module 820 is used to broadcast the system information. Among them, the system information includes second information for indicating SDAP configuration and / or PDCP configuration. Among them, the second information is associated with QoS parameters, the QoS parameters are QoS parameters corresponding to a radio bearer, the radio bearer is a radio bearer between a first remote terminal and a second remote terminal, and the first remote terminal and the second remote terminal communicate through a relay terminal; or, the second information is associated with an RLC configuration; the terminal device determines the configuration of the first radio bearer according to the second information and the first QoS parameter.

[0238] As an optional implementation, the second information is used to indicate SDAP configuration and / or PDCP configuration, including: the second information includes SDAP configuration and / or PDCP configuration.

[0239] As an optional implementation, the second information is associated with QoS parameters, including: the second information includes a QoS parameter list, and the QoS parameter list includes the QoS parameters.

[0240] As an optional implementation, the second information is associated with an RLC configuration, including: the second information includes second indication information for indicating an RLC channel associated with a radio bearer.

[0241] As an optional implementation, the system information further includes first information for indicating RLC configuration and / or configuration, and the first information is associated with the QoS parameters.

[0242] As an optional implementation, the first information is associated with QoS parameters, including: the first information includes a QoS parameter list, the QoS parameter list includes the QoS parameters, and the QoS parameter list has an association relationship with the RLC channel.

[0243] As an alternative implementation, the first information includes first indication information for indicating a default RLC channel.

[0244] As an alternative implementation, the second indication information is further used to indicate a default RLC channel.

[0245] When the communication device 800 is a chip - type device or a circuit, the transceiver module may be an input - output circuit and / or a communication interface; the processing module is an integrated processor, a microprocessor, or an integrated circuit.

[0246] Figure 9 It is a schematic block diagram of the communication device 900 provided in the embodiments of the present application. The communication device 900 may be the terminal device or the network device in the above - mentioned embodiments. For example, the communication device 900 may be Figure 1 the terminal device in [reference] or a chip (system) in the terminal device. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. For specific functions, refer to the description in the above - mentioned method embodiments. Again, for example, the communication device 900 may be Figure 1 the network device in [reference] or a chip (system) in the network device. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. For specific functions, refer to the description in the above - mentioned method embodiments.

[0247] The communication device 900 includes one or more processors 901, which are used to implement or support the communication device 900 in implementing the functions of the terminal device or the network device in the method provided in the embodiments of the present application. For specific details, refer to the detailed description in the method examples and will not be elaborated here. The processor 901 may also be referred to as a processing unit or a processing module and can implement certain control functions. The processor 901 may be a general - purpose processor or a dedicated processor, etc. For example, it includes: a baseband processor, a central processor, an application processor, a modulation - demodulation processor, a graphics processor, an image signal processor, a digital signal processor, a video codec processor, a controller, a memory, and / or a neural network processor, etc. The baseband processor may be used to process communication protocols and communication data. The central processor may be used to control the communication device 900 (such as a network device or a terminal device), execute software programs, and / or process data. Different processors may be independent devices or may be integrated in one or more processors. For example, they may be integrated on one or more application - specific integrated circuits.

[0248] In one design, the processor 901 may include a program 903 (which may sometimes also be referred to as code or instructions), and the program 903 may be run on the processor 901 so that the communication device 900 executes the methods described in the following embodiments. In another possible design, the communication device 900 includes circuitry ( Figure 9 not shown), and the circuitry is used to implement the functions of the terminal device or network device in the above embodiments.

[0249] In one design, the communication device 900 may include one or more memories 902, on which there is stored a program 904 (which may sometimes also be referred to as code or instructions), and the program 904 may be run on the processor 901 so that the communication device 900 executes the methods described in the above method embodiments, such as Figure 3 the processes shown.

[0250] In one design, the processor 901 and / or the memory 902 may include artificial intelligence (AI) modules 907, 908, and the AI modules are used to implement AI-related functions. The AI modules may be implemented in a software, hardware, or software-hardware combination manner. For example, the AI modules may include a Radio Access Network (RAN) intelligent controller (RIC) module. For example, the AI modules may be near-real-time RIC or non-real-time RIC.

[0251] In a possible design, data may also be stored in the processor 901 and / or the memory 902. The processor and the memory may be provided separately or integrated together.

[0252] In a possible design, the communication device 900 may further include a transceiver 905 and / or an antenna 906. The processor 901 may sometimes also be referred to as a processing unit and controls the communication device 900. The transceiver 905 may sometimes also be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and is used to implement the transceiver function of the communication device 900 through the antenna 906.

[0253] In a possible design, the communication device 900 may further include one or more of the following components: a wireless communication module, an audio module, an external memory interface, an internal memory, a universal serial bus (USB) interface, a power management module, an antenna, a speaker, a microphone, an input / output module, a sensor module, a motor, a camera, or a display screen, etc. It can be understood that in some embodiments, the communication device 900 may include more or fewer components, or some components are integrated, or some components are split. These components can be implemented by hardware, software, or a combination of software and hardware.

[0254] The communication device in the above embodiments may be a terminal device, a circuit, a chip applied to a terminal device, or other combined devices or components having the above terminal device. Or, the communication device in the above embodiments may be a network device, a circuit, a chip applied to a network device, or other combined devices or components having the above network device. When the communication device is a terminal device or a network device, the transceiver module may be a transceiver, which may include an antenna and a radio frequency circuit, etc., and the processing module may be a processor, for example: a CPU. When the communication device is a chip system, the communication device may be an FPGA, an application-specific ASIC, a system on chip (SoC), a CPU, a network processor (NP), a DSP, a micro controller unit (MCU), a programmable logic device (PLD), or other integrated chips. The processing module may be the processor of the chip system. The transceiver module or the communication interface may be the input / output interface or the interface circuit of the chip system. For example, the interface circuit may be a code / data read / write interface circuit. The interface circuit may be used to receive code instructions (the code instructions are stored in the memory, and can be directly read from the memory, or can also be read from the memory through other devices) and transmit them to the processor; the processor may be used to run the code instructions to execute the methods in the above method embodiments. Another example is that the interface circuit may also be a signal transmission interface circuit between the communication processor and the transceiver.

[0255] An embodiment of the present application further provides a communication system. Specifically, the communication system includes at least one terminal device and at least one network device. The terminal device is a terminal device for implementing the functions related to at least one of the communication methods 500 to 700 described above, and the network device is a network device for implementing the functions related to at least one of the communication methods 500 to 700 described above. For specific reference, please refer to the relevant descriptions in the above method embodiments, which will not be elaborated here.

[0256] An embodiment of the present application also provides a computer-readable storage medium, including instructions, which when running on a computer, cause the computer to execute the methods executed by the terminal device or the network device in at least one of the communication methods 500 to 700 described above.

[0257] An embodiment of the present application also provides a computer program product, including computer program code, which when executed, causes the computer to execute the methods executed by the terminal device or the network device in at least one of the communication methods 500 to 700 described above.

[0258] An embodiment of the present application provides a chip system, which includes a processor and may also include a memory, for implementing the functions of the terminal device or the network device in at least one of the foregoing methods 500 to 700. The chip system may be composed of chips or may include chips and other discrete devices.

[0259] To implement the functions of the above Figures 8 - 9 communication device, an embodiment of the present application further provides a chip, including a processor, for supporting the communication device to implement the functions related to the terminal device or the network device in the above method embodiments. In a possible design, the chip is connected to a memory or the chip includes a memory, and the memory is used to store the necessary computer programs or instructions and data of the communication device.

[0260] It should be understood that in various embodiments of the present application, the magnitudes of the sequence numbers of the above processes do not mean the order of execution. The order of execution of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0261] Those of ordinary skill in the art will appreciate that the various illustrative logical blocks and steps described in connection with the embodiments disclosed herein can be implemented in electronic hardware, or in a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of this application.

[0262] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0263] In several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0264] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0265] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the part that essentially contributes to the technical solution of this application or part of this technical solution can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0266] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

1. A communication method, characterized in that, comprising: receiving a system message, the system message including first information for indicating Radio Link Control (RLC) configuration and / or Medium Access Control (MAC) configuration, the first information being associated with a QoS parameter, the QoS parameter being the QoS parameter corresponding to a radio bearer, the radio bearer being a radio bearer between a first remote terminal and a second remote terminal, and the first remote terminal and the second remote terminal communicating through a relay terminal; determining an association relationship between the first radio bearer and the RLC configuration and / or the MAC configuration according to the first information and a first QoS parameter.

2. The method according to claim 1, characterized in that, the method is applied to a first terminal, the first radio bearer being a radio bearer between the first terminal and a second terminal, the first terminal and the second terminal communicating through a third terminal, the first QoS parameter being the QoS parameter corresponding to the first radio bearer on a first link, the first link being a link between the first terminal and the third terminal; or, the method is applied to a third terminal, the first radio bearer being a radio bearer between the first terminal and a second terminal, the first terminal and the second terminal communicating through the third terminal, the first QoS parameter being the QoS parameter corresponding to the first radio bearer on a second link, the second link being a link between the third terminal and the second terminal.

3. The method according to claim 1, characterized in that, the first information for indicating RLC configuration and / or MAC configuration includes: the first information includes the RLC configuration and / or the MAC configuration.

4. The method according to claim 1 or 3, characterized in that, the first information being associated with a QoS parameter includes: the first information includes a QoS parameter list, the QoS parameter list including the QoS parameter, wherein the QoS parameter list has an association relationship with an RLC channel.

5. The method according to claim 4, characterized in that, the QoS parameter list indicates the QoS parameter mapped to the RLC channel.

6. The method according to claim 4 or 5, characterized in that, the first information further includes an RLC configuration index or an RLC channel identifier.

7. The method according to any one of claims 3-5, characterized in that, the first information includes a first indication information for indicating a default RLC channel.

8. The method according to any one of claims 2-6, characterized in that, when the method is applied to a first terminal, determining an association relationship between the first radio bearer and the RLC configuration and / or the MAC configuration according to the first information and a first QoS parameter includes: determining the first QoS parameter according to an SDAP configuration, the SDAP configuration being determined according to a second QoS parameter, the second QoS parameter being the end-to-end QoS parameter between the first terminal and the second terminal; Determine the RLC configuration and / or the MAC configuration according to the first QoS parameter.

9. The method according to any one of claims 2-6, wherein, the method is applied to the third terminal, and determining the association relationship between the first radio bearer and the RLC configuration and / or the MAC configuration according to the first information and the first QoS parameter includes: Receiving the SDAP configuration from the first terminal; Determining the first QoS parameter according to the SDAP configuration; Determining the RLC configuration and / or the MAC configuration according to the first QoS parameter.

10. A communication method, wherein, includes: Receiving a system message, the system message includes second information, the second information is used to indicate a service data adaptation protocol SDAP configuration and / or a packet data convergence protocol PDCP configuration; wherein, the second information is associated with a QoS parameter, the QoS parameter is a QoS parameter corresponding to a radio bearer, the radio bearer is a radio bearer between a first remote terminal and a second remote terminal, and the first remote terminal and the second remote terminal communicate through a relay terminal; or, the second information is associated with a radio link control RLC configuration; Determining the configuration of the first radio bearer according to the second information and the first QoS parameter.

11. The method according to claim 10, wherein, the method is applied to the first terminal, the first radio bearer is a radio bearer between the first terminal and the second terminal, the first terminal and the second terminal communicate through the third terminal, the first QoS parameter is a QoS parameter corresponding to the first radio bearer on the first link, and the first link is a link between the first terminal and the third terminal; or, the method is applied to the third terminal, the first radio bearer is a radio bearer between the first terminal and the second terminal, the first terminal and the second terminal communicate through the third terminal, the first QoS parameter is a QoS parameter corresponding to the first radio bearer on the second link, and the second link is a link between the third terminal and the second terminal.

12. The method according to claim 10 or 11, wherein, the second information is used to indicate the SDAP configuration and / or the PDCP configuration, including: the second information includes the SDAP configuration and / or the PDCP configuration.

13. The method according to any one of claims 10-12, wherein, the second information is associated with the QoS parameter, including: the second information includes a QoS parameter list, and the QoS parameter list includes the QoS parameter.

14. The method according to any one of claims 10-12, wherein, the second information is associated with a radio link control RLC configuration, including: the second information includes second indication information, and the second indication information is used to indicate an RLC channel associated with the radio bearer.

15. The method according to any one of claims 10-14, wherein, The system message further includes first information, which is used to indicate the RLC configuration and / or the media access control (MAC) configuration, and the first information is associated with the QoS parameter.

16. The method according to claim 14 or 15, wherein, the association between the first information and the QoS parameter includes: the first information includes a QoS parameter list, the QoS parameter list includes the QoS parameter, and the QoS parameter list has an association relationship with the RLC channel.

17. The method according to any one of claims 14-16, wherein, the first information includes first indication information, and the first indication information is used to indicate the default RLC channel.

18. The method according to claim 14 or 17, wherein, the second indication information is further used to indicate the default RLC channel.

19. A communication method, wherein, includes: determining a system message, the system message includes first information, the first information is used to indicate the radio link control (RLC) configuration and / or the media access control (MAC) configuration, the first information is associated with the QoS parameter, the QoS parameter is the QoS parameter corresponding to the radio bearer, the radio bearer is the radio bearer between the first remote terminal and the second remote terminal, and the first remote terminal and the second remote terminal communicate through a relay terminal; broadcasting the system message.

20. The method according to claim 19, wherein, the association between the first information and the QoS parameter includes: the first information includes a QoS parameter list, the QoS parameter list includes the QoS parameter, and the QoS parameter list has an association relationship with the RLC channel.

21. The method according to claim 20, wherein, the QoS parameter list indicates the QoS parameter mapped to the RLC channel.

22. The method according to claim 20 or 21, wherein, the first information includes first indication information, and the first indication information is used to indicate the default RLC channel.

23. A communication method, wherein, includes: determining a system message, the system message includes second information, the second information is used to indicate the service data adaptation protocol (SDAP) configuration and / or the packet data convergence protocol (PDCP) configuration; wherein, the second information is associated with the QoS parameter, the QoS parameter is the QoS parameter corresponding to the radio bearer, the radio bearer is the radio bearer between the first remote terminal and the second remote terminal, and the first remote terminal and the second remote terminal communicate through a relay terminal; or, the second information is associated with the radio link control (RLC) configuration; broadcasting the system message.

24. The method according to claim 23, wherein, the association between the second information and the QoS parameter includes: the second information includes a QoS parameter list, the QoS parameter list includes the QoS parameter.

25. The method according to claim 23, wherein, the association between the second information and the radio link control (RLC) configuration includes: The second information includes second indication information for indicating an RLC channel associated with the radio bearer.

26. A communication device, characterized in that the communication device includes a processing unit and a transceiver unit, the processing unit being coupled to the transceiver unit to perform the method according to any one of claims 1 to 9, or to perform the method according to any one of claims 10 to 18, or to perform the method according to any one of claims 19 to 22, or to perform the method according to any one of claims 23 to 25.

27. A communication device, characterized in that the communication device includes a processor and a memory, the memory being used to store a computer program, the processor being used to execute the computer program stored on the memory, so that the communication device performs the method according to any one of claims 1 to 9, or so that the communication device performs the method according to any one of claims 10 to 18, or so that the communication device performs the method according to any one of claims 19 to 22, or so that the communication device performs the method according to any one of claims 23 to 25.

28. A computer-readable storage medium, characterized in that the computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, it causes the computer to perform the method according to any one of claims 1 to 9, or causes the computer to perform the method according to any one of claims 10 to 18, or causes the communication device to perform the method according to any one of claims 19 to 22, or causes the communication device to perform the method according to any one of claims 23 to 25.

29. A computer program product, characterized in that the computer program product includes a computer program, and when the computer program runs on a computer, it causes the computer to perform the method according to any one of claims 1 to 9, or causes the computer to perform the method according to any one of claims 10 to 18, or causes the computer to perform the method according to any one of claims 19 to 22, or causes the computer to perform the method according to any one of claims 23 to 25.

30. A chip system, characterized in that the chip system includes: a processor and an interface, the processor being used to call and run an instruction from the interface, and when the processor executes the instruction, it implements the method according to any one of claims 1 to 9, or implements the method according to any one of claims 10 to 18, or implements the method according to any one of claims 19 to 22, or implements the method according to any one of claims 23 to 25.

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