A method and communication device for establishing relay transmission

Abstract

An embodiment of the present application discloses a method for establishing a relay bearer and a communication device, which are applicable to V2X, Internet of Vehicles, intelligent connected vehicles, assisted driving and other fields, and are used to establish a relay bearer, so that a relay device can transmit data between a first terminal and a second terminal through the relay bearer. The method of the embodiment of the present application includes: receiving a first parameter set sent by the first terminal for establishing a relay radio link control RLC bearer; further receiving a first configuration message sent by a network device, the first configuration message including a second parameter set corresponding to the relay RLC bearer; the relay device establishes a relay RLC bearer corresponding to the first link based on the first parameter set received from the first terminal and the second parameter set obtained from the network device, the first link being a link between the relay device and the second terminal, thereby enabling the first terminal and the second terminal to transmit data through the relay device. The present application also provides a communication device for establishing a relay bearer.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a method and a communication device for establishing relay bearer. Background Art

[0002] Vehicle to everything (V2X) is an important part of the future intelligent traffic management system. Vehicle to everything communication refers to providing vehicle information to vehicle users through sensors, vehicle terminals and other devices installed on the vehicle, and realizing mutual communication between vehicles, vehicles and people, vehicles and roadside infrastructure, and vehicles and networks through various communication technologies.

[0003] There are two communication modes in V2X, namely the communication mode through the PC5 interface and the communication mode through the Uu interface. Among them, the Uu interface is the communication interface between the network device and the terminal, and the PC5 interface is the direct communication interface between V2X terminals. The link of direct communication between terminals in V2X (communication through the PC5 interface) is also defined as a side link or side link (sidelink, SL). When terminals communicate with each other through sidelink, the vehicle nodes in the Internet of Vehicles have the characteristics of rapid movement and rapid changes in network topology. These characteristics may cause the communication link to be unstable or even interrupted, resulting in limited communication between terminals through sidelink. To solve this problem, the 3rd generation partnership project (3GPP) International Organization for Standardization is currently discussing the introduction of relay equipment between terminals, that is, data between two terminals can be forwarded through relay equipment.

[0004] When two terminals communicate through a relay device, there are a sending terminal, a receiving terminal, and a relay device. The sending terminal and the receiving terminal can transmit data and signaling through the relay device. The relay implementation methods discussed in the current standard include the relay method based on the data link layer (Layer 2). For the relay method based on L2, please refer to Figure 1 In the user plane protocol stack shown, the user plane data is relayed below the packet data convergence protocol (PDCP) layer. This relay method is still under discussion. How to establish a relay bearer and forward the data between the two terminals through the relay bearer has become an urgent problem to be solved. Summary of the invention

[0005] An embodiment of the present application provides a method for establishing a relay bearer and a communication device, the method is applied to a communication system, the communication system includes a network device, a first terminal, a second terminal and a relay device; the relay device is located within the coverage of the network device, and the relay device is connected to a base station in communication; the first terminal can be a sending terminal device, the second terminal can be a receiving terminal device, the link between the relay device and the second terminal is a first link, and the link between the first terminal and the relay device is a second link; in a relay mode based on the data link layer, the data on the user plane is relayed and forwarded below the PDCP layer, the relay device needs to establish a relay RLC bearer corresponding to the first link and a relay RLC bearer corresponding to the second link, the relay device can obtain a part of the parameters required to establish the relay RLC bearer from the first terminal, and another part of the parameters required to establish the relay RLC bearer obtained from the network device, the relay device establishes the relay RLC bearer based on the part of the parameters obtained from the first terminal and the part of the parameters obtained from the network device, so that the first terminal and the second terminal can realize data transmission through the relay device.

[0006] In a first aspect, an embodiment of the present application provides a method for establishing a relay bearer, which may include: a relay device receives an indication message sent by a first terminal, the indication message including configuration information for establishing a relay radio link control RLC bearer; the configuration information of the relay RLC bearer includes a first parameter set, and the first parameter set is a parameter set that the receiving side and the sending side need to understand consistently; for example, the first parameter set corresponds to the first link and the second link, then the first parameter set is a parameter that the first terminal, the relay device and the second terminal need to understand consistently; and the relay device can receive a first configuration message sent by a network device, and the first configuration message includes a relay RLC bearer A corresponding second parameter set, which is a set of sending side parameters; the relay device establishes a relay RLC bearer corresponding to the first link according to the first parameter set and the second parameter set, so that the first terminal and the second terminal can transmit data through the relay device; in this embodiment, the relay device establishes a relay RLC bearer based on some parameters obtained from the first terminal and some parameters obtained from the network device, and the relay device and the second terminal need to understand that the configuration parameters of the relay RLC bearer are consistent (or applicable to both) and are determined by the first terminal. The configuration parameters corresponding to the first link and the second link will be well adapted to better ensure the forwarding of business data.

[0007] In an optional implementation, the indication message also includes a first QoS information set corresponding to the relay RLC bearer; the relay device may also send a first request message to the network device to request the second parameter set; the first request message may include an identifier of the second terminal, an identifier of the relay RLC bearer and a target QoS information set; wherein the identifier of the second terminal is used to inform the network device that the requested second parameter set is a parameter set corresponding to the second link; the target QoS information set is associated with the first QoS information set; in an embodiment of the present application, the relay device reports target QoS information to the network device, and the target QoS information can reflect QoS parameters such as service data delay, reliability, throughput, packet loss rate, etc. transmitted by the relay RLC bearer, so that the relay device can obtain from the network device the second parameter set configured for the relay RLC bearer according to the target QoS information.

[0008] In an optional implementation, the first parameter set includes a first configuration parameter set corresponding to the first link and a second configuration parameter set corresponding to the second link; the first configuration parameter set is parameters that the relay device and the second terminal need to understand consistently, and the second configuration parameter set is parameters that the first terminal and the relay device need to understand consistently; the configuration parameters included in the first configuration parameter set are the same as the configuration parameters included in the second configuration parameter set, and the parameter value corresponding to each configuration parameter may be the same or different; further, the relay device may establish a relay RLC bearer corresponding to the first link according to the first configuration parameter set and the second parameter set, and establish a relay RLC bearer corresponding to the second link according to the second configuration parameter set; the relay RLC bearer corresponding to the second link is a unidirectional RLC bearer, that is, the first terminal may send data to the relay device via the relay RLC bearer corresponding to the second link, and the relay device may transmit the data to the second terminal via the relay RLC bearer corresponding to the first link.

[0009] In an optional implementation, the first parameter set may be a set, and the first parameter set corresponds to the first link and the second link, that is, the first parameter set is an RLC configuration parameter that is understood consistently by the first terminal, the relay device, and the second terminal; for example, the parameters in the first parameter set take the RLC SN length as an example, and the RLC SN length is 12 bits, which indicates that the RLC SN length corresponding to the first link is 12 bits, and also indicates that the RLC SN length corresponding to the first link is 12 bits; in an embodiment of the present application, the configuration parameters of the relay RLC bearer corresponding to the two links can be simultaneously indicated by the configuration parameters in a set.

[0010] In an optional implementation, the first configuration parameter set and the second configuration parameter set are the same parameter configuration set; the configuration parameters and parameter values ​​included in the first configuration parameter set are the same as the configuration parameters and parameter values ​​included in the second configuration parameter set; for example, the RLC SN length in the first configuration parameter set is 12 bits, and the RLC SN length in the second configuration parameter set is 12 bits; in an embodiment of the present application, two configuration parameter sets can respectively indicate the configuration parameters of the RLC bearer corresponding to the first link and the configuration parameters of the RLC bearer corresponding to the second link.

[0011] In an optional implementation, a relay device receives a configuration message for establishing a DRB sent by a first terminal, and forwards the configuration message for establishing a wireless data bearer DRB to a second terminal, and the relay bearer used to forward the configuration message can be pre-configured; the configuration message for establishing the DRB includes an identifier of the DRB, configuration information of the service data adaptation SDAP layer, configuration information of the packet data convergence protocol PDCP layer and configuration information of the RLC layer; wherein, the relay RLC bearer includes a correspondence between a relay RLC entity and a DRB; in an embodiment of the present application, the first terminal determines a configuration message for establishing the DRB and informs the second terminal of the configuration message, so that the second terminal can establish the DRB according to the configuration message, thereby enabling the relay device to forward data to the second terminal via the first link, and the second terminal to receive the data via the DRB of the first link.

[0012] In an optional implementation, the relay RLC bearer corresponding to the second link is a bidirectional RLC bearer; the relay device receives a second configuration message sent by the network device, the second configuration message including a second sending side parameter set corresponding to the relay RLC bearer corresponding to the second link and an identifier of the relay RLC bearer; the relay device can associate the second sending side parameter set to the relay RLC bearer based on the identifier of the relay RLC bearer; the relay device establishes a relay RLC bearer corresponding to the second link according to the first parameter set and the second sending side parameter set, and the relay RLC bearer is a bidirectional bearer, so that the relay device can send data to the first terminal through the second link.

[0013] In an optional implementation, the relay device may also send a second request message to the network device, and the second request message is used to request a second sending side parameter set; the second request message may include an identifier of the first terminal, an identifier of the relay RLC bearer, and a target QoS information set; wherein the identifier of the first terminal is used to inform the network device that the sending side parameter to be requested is the second sending side parameter set in the direction from the relay device to the first terminal; and the relay device reports the target QoS information set to the network device, and the network device may feedback the second sending side parameter set corresponding to the second link to the relay device based on the target QoS information set; the relay device may establish a bidirectional RLC bearer corresponding to the first link based on the first parameter set and the second sending side parameter set, so that the relay device can feedback data to the first terminal through the bidirectional RLC bearer corresponding to the second link.

[0014] In an optional implementation, the first QoS information set is a set, which indicates the QoS information set corresponding to the data transmission from the first terminal to the second terminal; taking the delay as an example, the delay in the first QoS information set is 10ms, indicating that the delay requirement for data transmission from the first terminal to the second terminal is 10ms; the target QoS information set can be the first QoS information set, and it can be understood that the relay device directly reports the first QoS information set received from the first terminal as the target QoS information set to the network device; or, the target QoS information set is an information set determined by the relay device according to the first QoS information set. For example, the relay device can determine that the delay requirement for data transmission from the relay device to the second terminal is 5ms based on the delay requirement of 10ms for data transmission from the first terminal to the second terminal; the relay device reports the target QoS information set to the network device, and the relay device can obtain a second parameter set from the network device for establishing a relay RLC bearer.

[0015] In an optional implementation, the first QoS information set includes two sets, namely, the two sets are a first information set and a second information set, the first information set is a QoS information set corresponding to when the relay device transmits data through the first link; for example, taking latency as an example, the latency requirement for the relay device to transmit data to the second terminal through the first link is 5ms; the second information set is a QoS information set corresponding to when the first terminal transmits data through the second link; for example, the latency requirement corresponding to the first terminal transmitting data to the relay device through the second link is 5ms; the target QoS information set can be an information set determined by the relay device according to the second information set, for example, the relay device can determine the latency requirement for the relay device to transmit data to the second terminal through the first link according to the latency requirement corresponding to the first terminal transmitting data to the relay device through the second link; or, the target QoS information set is the first information set in the first QoS information set, that is, the relay device directly reports the first information set as the target QoS information set to the network device, the relay device obtains the second parameter set for establishing the relay RLC bearer from the network device, and the relay device establishes the relay RLC bearer corresponding to the second link.

[0016] In the second aspect, an embodiment of the present application provides a method for establishing a relay bearer, including: a relay device receives a first configuration message sent by a network device; the first configuration message includes a target parameter set of a relay RLC bearer corresponding to a first link; then the relay device establishes a relay RLC bearer corresponding to the first link according to the target parameter set, and the first link is used for data transmission between a first terminal and a second terminal; in this embodiment, the relay device receives a target parameter set configured by the network device for the relay device for establishing a relay RLC bearer. Since the transmission between the relay device and the second terminal requires the allocation of resources by the network device to which the relay device is connected, it is more appropriate for the network device to determine the configuration parameters corresponding to the first link, which can avoid the additional complexity of the base station scheduling caused by the first terminal determining the configuration parameters of the relay RLC bearer. The relay device can establish the relay RLC bearer corresponding to the first link according to the target parameter set, thereby enabling the relay device to forward data between the two terminals.

[0017] In one possible implementation, the target parameter set includes a first configuration parameter set and a first sending side parameter set corresponding to the first link, and the first configuration parameter set is a set of parameters that the relay device and the second terminal need to understand consistently; the parameters contained in the first sending side parameter set corresponding to the first link are parameters only related to the sending side, for example, the timer duration T-PollRetransmit for controlling polling retransmission, the parameter pollPDU for controlling triggering polling, etc.; the relay device can establish a relay RLC bearer corresponding to the first link according to the first configuration parameter set corresponding to the first link and the first sending side parameter set corresponding to the first link, thereby enabling the relay device to forward data between the two terminals.

[0018] In one possible implementation, a relay device receives an indication message sent by a first terminal, the indication message including configuration information for establishing a relay RLC bearer; the configuration information of the relay RLC bearer may include an identifier of the relay RLC bearer, an identifier of a wireless data bearer DRB associated with the relay RLC bearer, and a second configuration parameter set; the relay RLC bearer includes a correspondence between a relay RLC entity and a DRB; wherein the second configuration parameter set is a configuration parameter corresponding to the second link, and it can be understood that the second configuration parameter set is a set of parameters that the first terminal and the relay device need to understand consistently; the relay device can establish a relay RLC bearer corresponding to the second link based on the second configuration parameter set received from the first terminal; thereby, the relay device can receive data sent by the first terminal through the relay RLC bearer corresponding to the second link and transmit it to the second terminal through the relay RLC bearer corresponding to the first link.

[0019] In one possible implementation, the indication message includes a first quality of service QoS information set; before the relay device receives the first configuration message sent by the network device, the relay device may also send a first request message to the network device to request the target parameter set; the first request message may include an identifier of the second terminal, an identifier of the relay RLC bearer and a target QoS information set; wherein the identifier of the second terminal is used to inform the network device that the requested target parameter set is a parameter set corresponding to the second link, and the target QoS information set is associated with the first QoS information set; the target QoS information set is in a corresponding relationship with the target parameter set; in this embodiment, the relay device reports target QoS information to the network device, and the target QoS information can reflect QoS parameters such as service data delay, reliability, throughput, packet loss rate, etc. transmitted by the relay RLC bearer, so that the network device can configure the target parameter set for the relay RLC bearer according to the target QoS information.

[0020] In one possible implementation, the relay RLC bearer corresponding to the second link can be a bidirectional RLC bearer; the relay device receives a second configuration message sent by the network device, and the second configuration message includes a second sending side parameter set corresponding to the bidirectional RLC bearer corresponding to the second link; the relay device establishes a relay RLC bearer corresponding to the second link according to the second sending side parameter set and the second configuration parameter set, and the relay RLC bearer is a bidirectional RLC bearer, which can enable the relay device to receive data sent by the first terminal through the bidirectional RLC bearer, and send data to the first terminal.

[0021] In one possible implementation, the relay device sends a second request message to the network device to request the second sending side parameter set corresponding to the bidirectional RLC bearer corresponding to the second link; the second request message may include an identifier of the first terminal, an identifier of the relay RLC bearer and a target QoS information set; wherein the identifier of the first terminal is used to inform the network device that the sending side parameter to be requested is the second sending side parameter set in the direction from the relay device to the first terminal; and the relay device reports the target QoS information set to the network device, and the network device can feedback the second sending side parameter set corresponding to the second link to the relay device, and the target QoS information set has a corresponding relationship with the second sending side parameter set; in an embodiment of the present application, the second sending side parameter set is configured by the network device, and the relay device reports the target QoS information set, the network device can configure the second sending side parameter set corresponding to the second link for the relay device according to the target QoS information set, and the relay device can establish a bidirectional RLC bearer corresponding to the first link according to the second configuration parameter set and the second sending side parameter set, so that the relay device can feedback data to the first terminal through the bidirectional RLC bearer corresponding to the second link.

[0022] In one possible implementation, the relay device sends configuration information of the RLC bearer corresponding to the DRB to the second terminal, and the configuration information of the RLC bearer includes a first configuration parameter set, an identifier of the DRB, and an identifier of the RLC bearer; the relay device sends the first configuration parameter set obtained from the network device to the second terminal, so that the second terminal can associate the first configuration parameter set with the RLC bearer based on the identifier of the DRB and the identifier of the RLC bearer. The first configuration parameter set is used for the second terminal to establish a DRB bearer, so that the second terminal can receive data transmitted by the relay device according to the established DRB bearer.

[0023] In one possible implementation, a relay device receives configuration information for establishing a DRB sent by a first terminal, and forwards the configuration information for establishing the DRB to a second terminal; wherein the configuration information for establishing the DRB includes an identifier of the DRB, configuration information of the service data adaptation SDAP layer, configuration information of the packet data convergence protocol PDCP layer, and the relay RLC bearer includes a correspondence between the relay RLC entity and the DRB; the relay device can forward the configuration information for establishing the DRB sent by the first terminal to the second terminal, and the relay RLC bearer for forwarding the configuration information for establishing the DRB can be pre-configured; in an embodiment of the present application, the first terminal determines the configuration information for establishing the DRB and informs the second terminal of the configuration information, so that the second terminal can establish the DRB according to the configuration information, thereby enabling the relay device to forward data to the second terminal through the first link, and the second terminal receives the data through the DRB.

[0024] In one possible implementation, the relay device can send the first configuration parameter set to the first terminal, and then the first terminal sends the first configuration parameter set to the second terminal. The first terminal can forward the first configuration parameter set to the second terminal through the relay device, and the relay RLC bearer used for forwarding is pre-configured to save the number of signaling messages between the relay device and the second terminal.

[0025] In the third aspect, an embodiment of the present application provides a method for establishing a relay bearer, comprising: a first terminal determines configuration information for establishing a relay RLC bearer, the configuration information of the relay RLC bearer includes a first parameter set; the first terminal sends the configuration information of the relay RLC bearer to a relay device; in this embodiment, the relay device can establish a relay RLC bearer based on the configuration information of the relay RLC bearer determined by the first terminal, thereby enabling the relay device to transmit data sent by the first terminal to the second terminal through the relay RLC bearer.

[0026] In one possible implementation, the first parameter set may include two sets, the two sets being a first configuration parameter set corresponding to the first link and a second configuration parameter set corresponding to the second link; the first configuration parameter set may be understood as a set of parameters that are consistently understood by the relay device and the second terminal, and the second configuration parameter set may be understood as a set of parameters that are consistently understood by the first terminal and the relay device; the first configuration parameter set is used for the relay device to establish a relay RLC bearer corresponding to the first link, and the second configuration parameter set is used for the relay device to establish a relay RLC bearer corresponding to the second link.

[0027] In one possible implementation, the first parameter set may be a set, and the first parameter set corresponds to the first link and the second link, that is, the first parameter set is a set of RLC configuration parameters that the first terminal, the relay device, and the second terminal all need to understand consistently; for example, the parameters in the first parameter set take the RLC SN length as an example, and the RLC SN length is 12 bits, which indicates that the RLC SN length corresponding to the first link is 12 bits, and also indicates that the RLC SN length corresponding to the first link is 12 bits; in an embodiment of the present application, the configuration parameters of the relay RLC bearer corresponding to the two links can be simultaneously indicated through the configuration parameters in a set.

[0028] In a possible implementation, the first configuration parameter set and the second configuration parameter set are the same configuration parameter set; the configuration parameters and parameter values ​​contained in the first configuration parameter set are the same as the configuration parameters and parameter values ​​contained in the second configuration parameter set, for example, the RLC SN length in the first configuration parameter set is 12 bits, and the RLC SN length in the second configuration parameter set is 12 bits; in an embodiment of the present application, two configuration parameter sets can be used to respectively indicate the configuration parameters of the RLC bearer corresponding to the first link and the configuration parameters of the RLC bearer corresponding to the second link; the first terminal can determine the configuration parameters of the relay RLC bearer corresponding to the first link and the configuration parameters of the relay RLC bearer corresponding to the second link together, and the configuration parameters corresponding to the first link and the second link will be well adapted to better ensure the forwarding of service data.

[0029] In one possible implementation, the first parameter set corresponds to the second link, that is, the first parameter set is parameters that are consistently understood by the first terminal and the relay device; in this embodiment, the first terminal may also only determine the configuration information corresponding to the second link for establishing the relay RLC bearer, and the relay device can obtain the configuration information corresponding to the second link for establishing the relay RLC bearer from the first terminal, and establish the relay RLC bearer corresponding to the second link according to the configuration information corresponding to the second link for establishing the relay RLC bearer.

[0030] In one possible implementation, the configuration information also includes a first QoS information set, which is a set, and the first QoS information set is the QoS information set corresponding to the data transmitted by the first terminal to the second terminal; in an embodiment of the present application, the first terminal can determine the QoS information set that is suitable for both the first link and the second link through a set.

[0031] In a possible implementation, the first QoS information set may also include two sets, the two sets including a first information set and a second information set, the first information set being the QoS information set corresponding to when the relay device transmits data through the first link; for example, taking latency as an example, the latency requirement for the relay device to transmit data to the second terminal through the first link is 5ms; the second information set is the QoS information set corresponding to when the first terminal transmits data through the second link, for example, the latency requirement corresponding to the first terminal transmitting data to the relay device through the second link is 5ms; in an embodiment of the present application, the first terminal can determine two sets, that is, it can respectively determine the QoS information set corresponding to the first link and the QoS information set corresponding to the second link.

[0032] In a fourth aspect, an embodiment of the present application provides a communication device, which has the function of implementing the functions performed by the relay device of the first or second aspect above, or the communication device has the function of implementing the functions performed by the first terminal of the third aspect above; the function can be implemented by hardware, or by hardware executing corresponding software implementation; the hardware or software includes one or more modules corresponding to the above functions.

[0033] In a fifth aspect, an embodiment of the present application provides a communication device, comprising a processor, wherein the processor is coupled to at least one memory, and the processor is used to read a computer program stored in the at least one memory, so that the device executes any method described in the first aspect or the second aspect above, or the device executes any method described in the third aspect above.

[0034] In the sixth aspect, an embodiment of the present application provides a computer-readable medium, which is used to store a computer program. When the computer program is run on a computer, the computer executes the method described in any one of the first or second aspects above, or the device executes the method described in any one of the third aspects above.

[0035] In the seventh aspect, an embodiment of the present application provides a chip, characterized in that it includes a processor and a communication interface, and the processor is used to read instructions to execute any method in the first aspect or the second aspect above, or to enable the device to execute any method in the third aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of a user plane protocol stack of a first terminal, a relay device, and a second terminal in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of a communication system in an embodiment of the present application;

[0038] Figure 3 This is a schematic diagram of the steps of an embodiment of the present application in establishing a method for carrying out the inheritance;

[0039] Figure 4 This is a schematic diagram of the steps of another embodiment of the present application in the process of establishing an embodiment;

[0040] Figure 5 This is a schematic diagram of the steps of another embodiment of the present application in the process of establishing an embodiment;

[0041] Figure 6 A schematic diagram of the structure of an embodiment of a communication device in the embodiments of the present application;

[0042] Figure 7 This is a structural diagram of another embodiment of a communication device in the embodiments of the present application. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0044] The term "and / or" in this application can be a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0045] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or modules is not necessarily limited to those steps or modules that are clearly listed, but may include other steps or modules that are not clearly listed or inherent to these processes, methods, products or devices.

[0046] For ease of understanding, the terms used in this application are first explained:

[0047] Radio link control (RLC) bearer: A network device (such as a base station) can configure an RLC entity and a corresponding logical channel associated with a radio bearer (RB). A radio bearer can be a data radio bearer (DRB) or a signaling radio bearer (SRB). An RLC entity and a corresponding logical channel associated with a radio bearer are usually referred to as RLC bearers; wherein the configuration parameters of the RLC bearer include: RLC entity configuration, logical channel identifier (LCID), logical channel configuration, and an identifier of the associated radio bearer. For a sidelink interface, a network device can configure an RLC entity and a logical channel associated with a DRB, and an RLC entity and a logical channel associated with a sidelink radio bearer are referred to as sidelink RLC bearers.

[0048] First link: the link between the relay device and the second terminal (receiving terminal).

[0049] Second link: the link between the first terminal (sending terminal) and the relay device.

[0050] Configuration parameters applicable to both the sending side and the receiving side (Tx&Rx common): In order to ensure communication between the receiving side and the sending side, the receiving side and the sending side need to understand the same parameters, such as the RLC configuration parameters of Tx&Rx common include RLC mode (mode), RLC sequence number length (sequence number, SN), etc. The sending side and the receiving side are relative concepts. For example, for the second link, the first terminal is the sending side and the relay device is the receiving side. The parameters that the sending side and the receiving side need to understand are the parameters that the first terminal and the relay device understand. For the first link, the relay device is the sending side and the second terminal is the receiving side. The configuration parameters of Tx&Rx common are the parameters that the relay device and the second terminal need to understand. For the entire link from the first terminal to the second terminal, the configuration parameters of Tx&Rx common are the parameters that the first terminal, the relay device, and the second terminal need to maintain consistent understanding. If the first terminal forwards data to the second terminal through a relay device, the configuration parameters of Tx&Rx common are parameters that the first terminal and the second terminal need to understand consistently, such as the relevant configuration parameters of the packet data convergence protocol (PDCP) of Tx&Rx Common, which may specifically include PDCPSN length, robust header compression (RoHC) configuration, etc. It should be noted that "Tx&Rx common" is also abbreviated as "common" in this article.

[0051] Bidirectional RLC bearer: Through the bidirectional RLC bearer, data can be sent and received. For example, for the second link, if the RLC bearer corresponding to the second link is a bidirectional RLC bearer, the first terminal can send data to the relay device and receive data sent by the relay device (or the relay device can send data to the first terminal).

[0052] One-way RLC bearer: Data flows from the sending device to the receiving device. For the sending end, only data can be sent through the one-way RLC bearer. For the receiving end, only data can be received through the one-way RLC bearer. If the RLC bearer corresponding to the second link is a one-way RLC bearer, the first terminal can send data to the relay device, but the relay device cannot send data to the first terminal through the one-way RLC bearer.

[0053] Transmitting side (Tx only) parameters: parameters related only to the transmitting side. For example, for the first link, when the relay device sends data to the second terminal, the relay device is the transmitting side, and the Tx only parameters correspond to the parameters configured for the relay device. For example, the Tx only parameters carried by RLC include but are not limited to the timer duration T-PollRetransmit for controlling polling retransmission, the parameters pollPDU and pollByte for controlling the triggering of polling, the maximum number of automatic repeat-request (ARQ) retransmissions allowed in RLC AM mode, etc.

[0054] Quality of service (QoS) information: may include PC5 quality of service identifier (PQI), PC5 QoS flow identifier (PFI), logical channel priority, or at least one of other QoS parameters that can reflect the service data delay, reliability, throughput, packet loss rate, etc. transmitted by RLC.

[0055] Identifier of relay RLC bearer: used to distinguish RLC bearers. The identifier of the relay RLC bearer can be the index number of the relay RLC bearer. For example, the index number can be 1, 3, 5, 7, etc.; or the LCID corresponding to the relay RLC bearer; or the identifier is an implicit representation of the index determined in sequence according to the number of relay RLC bearers. For example, the first terminal indicates a total of 5 relay RLC bearers, then the corresponding index numbers of the 5 relay RLC bearers are 0, 1, 2, 3, 4, etc.

[0056] Terminal identification: It can be a layer 2 destination ID (destination layer-2 ID), identifying a specific unicast receiving terminal. Or the identification can also be an identification assigned by the relay device for relay communication between the first terminal and the second terminal, such as a local ID.

[0057] The embodiment of the present application provides a method and a communication device for establishing a relay bearer, and the method is applied to a communication system, which includes but is not limited to a fourth generation (4G) communication system, a 5G communication system, a 6G communication system, a system integrating multiple communication systems, or a communication system that evolves in the future. For example, a long term evolution (LTE) system, a new radio (NR) system, and a communication system related to the third generation partnership project (3GPP), and other such communication systems.

[0058] See also Figure 2 As shown, the communication system includes a network device 201, a first terminal 202, a second terminal 203 and a relay device 204. The present application can be applied to the application scenario of sidelink unicast communication. The relay device 204 is located within the coverage of the network device 201 (such as a gNB or an eNB), and the relay device 204 is connected to the base station for communication. There is no limitation on whether the first terminal 202 and the second terminal 203 are within the coverage of the base station. For example, the first terminal 202 and the second terminal 203 can be within the coverage of one base station; or they can be within the coverage of different base stations; or one is within the coverage of the base station and the other is outside the coverage of the base station (out-of-coverage); or both terminals are outside the coverage of the base station (out-of-coverage). The first terminal 202 may be a transmitting device, the second terminal 203 may be a receiving device, the link between the relay device 204 and the second terminal 203 is the first link, and the link between the first terminal 202 and the relay device 204 is the second link; in the relay mode based on L2, the data on the user plane is relayed and forwarded below the PDCP layer, and the relay device 204 needs to establish a relay RLC bearer corresponding to the first link and a relay RLC bearer corresponding to the second link. The relay device 204 may obtain some parameters required for establishing the relay RLC bearer from the first terminal 202 and some parameters required for establishing the relay RLC bearer from the network device 201. The relay device 204 establishes the relay RLC bearer based on the some parameters obtained from the first terminal 202 and the some parameters obtained from the network device 201, so that the first terminal 202 and the second terminal 203 can transmit data through the relay device 204.

[0059] In the present application, network equipment includes but is not limited to: evolved base stations (NodeB or eNB or e-NodeB, evolutionary Node B) in LTE, base stations (gNodeB or gNB) or transmission receiving points (transmission receiving point / transmission reception point, TRP) in NR, and base stations that are subsequently evolved by 3GPP. The base station can be: a macro base station, a micro base station, a micro-micro base station, a small station, a relay station, or a balloon station, etc. Multiple base stations can support networks of the same technology mentioned above, or they can support networks of different technologies mentioned above. The base station may include one or more co-sited or non-co-sited TRPs. The network device may also be a wireless controller, a centralized unit (CU), and / or a distributed unit (DU) in a cloud radio access network (CRAN) scenario. The following description takes the network device as a base station as an example.

[0060] A terminal is a device with wireless transceiver functions. A terminal may also be sometimes referred to as a terminal device, user equipment (UE), access terminal device, mobile station (MS), mobile terminal (MT), UE unit, UE station, mobile station, mobile station, mobile device, UE terminal device, wireless communication device, machine terminal, UE agent or UE device, etc. In this application, a terminal refers in particular to a device capable of sidelink communication, such as a vehicle-mounted terminal, a terminal in self-driving, a terminal in assisted driving, or a handheld terminal capable of V2X communication, a mobile phone, etc. The terminal of this application may be a vehicle-mounted module, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit built into a vehicle as one or more components or units.

[0061] The relay device may be a terminal, a drive test unit, or a wireless relay node (or relay station). The terminal may be a mobile phone, a tablet computer (Pad), a handheld terminal, a wearable device, a vehicle-mounted terminal, a terminal in self-driving, or a terminal in assisted driving. The terminal may also be sometimes referred to as a terminal device, UE, access terminal device, MS, MT, UE unit, UE station, mobile station, mobile station, mobile device, UE terminal device, wireless communication device, machine terminal, UE agent or UE device, etc.

[0062] In an embodiment of the present application, the execution subject of the steps executed by the relay device may be the relay device, or the processor, chip or chip system in the relay device; the execution subject of the steps executed by the first terminal may be the first terminal, or the processor, chip or chip system in the first terminal.

[0063] See also Figure 3 As shown, an embodiment of the present application provides an embodiment of a method for establishing a relay bearer. In this embodiment, the first terminal is used as a transmitting end and the second terminal is used as a receiving end for explanation. In this embodiment, the first terminal determines the configuration information of the Tx&Rx common relay RLC bearer applicable to both the first link and the second link, and the first terminal sends the corresponding QoS information of the relay RLC bearer to the relay device; then the relay device reports the mapping relationship between the relay RLC bearer and the QoS information to the network device, and requests the network device to configure the corresponding Tx only parameters of the relay RLC bearer; the relay device establishes the corresponding relay RLC bearer based on the two parts of configuration information, namely, the configuration information of the Tx&Rx common relay RLC bearer and the corresponding Tx only parameters of the relay RLC bearer.

[0064] Step 301, the first terminal sends configuration information for establishing a SL-DRB (also referred to herein as "DRB") to the second terminal, and the configuration information for establishing the DRB includes the DRB identifier, the configuration information of the service data adaptation SDAP layer, the configuration information of the packet data convergence protocol PDCP layer, and the configuration information of the RLC layer. The relay RLC bearer includes the correspondence between the relay RLC entity and the DRB. The relay device receives the configuration information for establishing the DRB sent by the first terminal, and forwards the configuration information for establishing the DRB to the second terminal. Thereby, the second terminal can establish the DRB according to the configuration information of the DRB.

[0065] In this step, the configuration information for establishing the DRB determined by the first terminal is used to establish the DRB for the second terminal. The first terminal may inform the second terminal of the configuration information of the SL-DRB to be established through a radio resource control (RRC) message, and the message may be a sidelink RRC connection reconfiguration message (RRC ReconfigurationSidelink). Among them, the DRB identifier may be the DRB index, and the SDAP configuration information may include a mapping relationship from QoS flow to DRB. The PDCP configuration information includes the PDCP configuration information of Tx&Rx Common (such as PDCP SN length, RoHC configuration), and the RLC configuration information includes the RLC configuration of Tx&Rx Common (such as RLC mode, RLC SN length), LCID, etc. The message is forwarded to the second terminal through a relay device, and the configuration information carried by the relay RLC that forwards the message may be predefined by the protocol or preconfigured.

[0066] Exemplarily, in this step, the purpose of the first terminal sending the configuration information for establishing DRB to the second terminal is to establish DRB for the second terminal, which has no direct connection with step 302. Therefore, the timing of step 301 is not limited, and step 301 can be executed at any position after step 302.

[0067] Step 302: The first terminal determines configuration information for establishing a relay RLC bearer, where the configuration information of the relay RLC bearer includes a first parameter set.

[0068] Optionally, the configuration information of the relay RLC bearer includes an identifier of the relay RLC bearer.

[0069] The first parameter set may include common RLC configuration parameters (such as RLC mode, RLC SN length, etc.). In this embodiment, the first terminal determines the common RLC configuration parameters corresponding to the first link and the common RLC configuration parameters corresponding to the second link. It can also be understood that the first terminal determines the RLC configuration parameters applicable to both the relay device and the second terminal (Tx & Rx common).

[0070] In a possible implementation, the first parameter set is a set, the first parameter set includes configuration parameters and parameter values ​​corresponding to the configuration parameters, and the configuration parameters and corresponding parameter values ​​in the first parameter set are applicable to both the first link and the second link. For example, the configuration parameter takes the RLC SN length as an example, and the RLC SN length is 12 bits, which means that the RLC SN length corresponding to the second link is 12 bits, and the RLC SN length corresponding to the first link is also 12 bits.

[0071] In another possible implementation, the first parameter set may include two configuration parameter sets, and the first parameter set includes a first configuration parameter set corresponding to the first link and a second configuration parameter set corresponding to the second link. The configuration parameters included in the first configuration parameter set are the same as the configuration parameters included in the second configuration parameter set, and the parameter value corresponding to each configuration parameter may be the same or different. For example, the first configuration parameter set and the second configuration parameter set both include the RLC mode and the RLC SN length, the RLC SN length in the first configuration parameter set is 12 bits, and the RLC SN length in the second configuration parameter set is 15 bits. Alternatively, the configuration parameters and the parameter values ​​of the configuration parameters in the first configuration parameter set and the second configuration parameter set are the same, that is, the first configuration parameter set and the second configuration parameter set are the same configuration parameter set, such as the RLC SN length in the first configuration parameter set and the second configuration parameter set is 12 bits.

[0072] Step 303: The relay device receives an indication message sent by the first terminal for indicating the establishment of a relay RLC bearer. The indication message includes configuration information of each relay RLC bearer to be established; and the configuration information of each relay RLC bearer includes a first parameter set.

[0073] The first parameter set can be understood by referring to the description in the above step 302, which will not be described here.

[0074] The number of relay RLC bearers is at least one, and the specific number is not limited and is determined according to the service data to be transmitted.

[0075] Optionally, the configuration information of the relay RLC bearer may include an identifier of the relay RLC bearer.

[0076] Optionally, the configuration information of the relay RLC bearer may also include: a first QoS information set corresponding to the relay RLC bearer. In one possible implementation, the first QoS information set may be a set. In this implementation, the first QoS information set may be a QoS information set corresponding to the first terminal mapped to the relay RLC bearer for data transmission, and the first QoS information set corresponds to the second link and the first link. For example, taking the delay parameter in the first QoS information set as an example, if the delay is 10ms, it means that the delay of the data sent by the first terminal to the second terminal through the second link and the first link is 10ms. In another possible implementation, the first QoS information set may include two information sets, namely the first information set and the second information set. Among them, the first information set corresponds to the first link, that is, the first information set is the QoS information set corresponding to the relay device when transmitting data through the first link. The second information set corresponds to the second link, and the second information set is the QoS information set corresponding to the first terminal when transmitting data through the second link. For example, taking the delay parameter in the QoS information set as an example, the delay in the first information set is 5ms, and the delay in the second information set is 5ms.

[0077] Optionally, the configuration information of the relay RLC bearer may also include: an LCID corresponding to the relay RLC bearer.

[0078] Optionally, the indication message may further include at least one of the following information:

[0079] 1) An identifier of the second terminal, where the identifier of the second terminal is used to allow the relay device to identify that a corresponding relay RLC bearer needs to be established for data transmission between the first terminal and the second terminal.

[0080] 2) An indication field (such as relay_config_indication), which is used to inform the relay device that the configuration information carried by the indication message is information for establishing a relay RLC bearer.

[0081] After receiving the indication message sent by the first terminal, the relay device determines that a relay RLC bearer needs to be established based on the indication message itself, or the configuration information carried in the indication message, or the indication field carried in the indication message.

[0082] Step 304: The relay device sends a first request message to the network device, the first request message being used to request the network device to configure a corresponding second parameter set (ie, a first transmitting side parameter set) for the relay RLC bearer corresponding to the first link. The first request message includes information associated with the relay RLC bearer.

[0083] Optionally, the first request message includes an identifier of the relay RLC bearer and / or an identifier of the second terminal, wherein the identifier of the second terminal is used to inform the network device that the requested second parameter set is a parameter set corresponding to the second link.

[0084] Optionally, the information associated with the relay RLC bearer includes a target QoS information set. The target QoS information set is associated with the first QoS information set; and the target QoS information set is in a corresponding relationship with the relay RLC bearer.

[0085] The target QoS information set can have the following implementation methods: 1. If the first QoS information set is a set: 1) The target QoS information set can be the first QoS information set. 2) The target QoS information set can be an information set determined based on the first QoS information set. For example, if the delay in the first QoS information set is 10ms (the delay from the first terminal to the second terminal is 10ms), the relay device can determine by itself that the delay of the first link is 5ms, and the delay in the target QoS information set is 5ms. The target QoS information set corresponds to the QoS information corresponding to the first link. 2. If the first QoS information set includes two sets (i.e., the first information set and the second information set): the target QoS information set can be the first information set (i.e., the QoS information corresponding to the first link).

[0086] Exemplarily, the target QoS information set has a corresponding relationship with the Tx only parameter corresponding to the relay RLC bearer, and the network device can configure the first sending side parameter set (a set of Tx only parameters) corresponding to the relay RLC bearer for the relay device according to the target QoS information set.

[0087] Optionally, the relay RLC bearer associated information may also include an RLC mode.

[0088] Optionally, the information associated with the relay RLC bearer may also include an LCID corresponding to the relay RLC bearer.

[0089] Optionally, the content in the indication message in the above step 303 is directly reported to the network device through the first request message, or the first request message can directly report the configuration information carried by the relay RLC to the network device.

[0090] Optionally, the first request message includes an indication field for transmission side parameter configuration (such as relay_TxConfig_Request), and the indication field is used to indicate: requesting the relay RLC corresponding to the first link to bear the corresponding first transmission side parameter set (a set of Tx only parameters).

[0091] The network device receives a first request message sent by the relay device, and determines that Tx only parameters corresponding to the relay RLC bearer need to be configured for the relay device based on the first request message itself or information carried in the first request message, or an indication field carried in the first request message.

[0092] It should be noted that step 304 is an optional step and may not be performed, and step 305 may be performed directly, that is, the relay device does not need to send a request to the network device, and the relay device may directly receive the first configuration message pre-configured by the network device for the relay device to establish a relay RLC bearer.

[0093] Step 305: The relay device receives a first configuration message sent by the network device, where the first configuration message includes a second parameter set corresponding to the relay RLC bearer.

[0094] The second parameter set includes a first transmission side parameter set (a set of Tx only parameters). The first transmission side parameter set includes but is not limited to a timer duration T-PollRetransmit for controlling polling retransmission, parameters pollPDU and pollByte for controlling triggering polling, and a maximum number of ARQ retransmissions allowed in RLC AM mode.

[0095] Optionally, the first configuration message includes an identifier of the relay RLC bearer.

[0096] The relay device can associate the first sending side parameter set (Tx only parameters) configured by the network device with the relay RLC bearer corresponding to the first link based on the identifier of the relay RLC bearer in this step and the identifier of the relay RLC bearer in step 304, and the first sending side parameter set corresponds to the first link.

[0097] Optionally, the first configuration message may also include configuration information of a logical channel (logical channel, LCH), the configuration information of the LCH including: priority of the LCH, relevant parameters of control execution (logical channel prioritization, LCP) (such as logical channel priority, prioritized bit rate (prioritized bit rate, PBR), bucket size duration (bucket size duration, BSD), etc.), whether to enable hybrid automatic repeat request (hybrid automatic repeat request, HARQ) feedback, scheduling request (scheduling request, SR) resources associated with the LCH, and at least one of the logical channel groups (logical channel group, LCG) to which it belongs.

[0098] Step 306: The relay device establishes a relay RLC bearer corresponding to the first link according to the first parameter set and the second parameter set.

[0099] If the first parameter set is a set, the relay device establishes a unidirectional RLC bearer corresponding to the second link according to the receiving side parameters corresponding to the first parameter set (RLC configuration parameters of Tx&Rx common), and establishes a relay RLC bearer corresponding to the first link according to the first parameter set and the first sending side parameter set (Tx only parameters) corresponding to the relay RLC bearer received from the network device.

[0100] If the first parameter set includes two sets, that is, the first parameter set includes a first configuration parameter set and a second configuration parameter set, the relay device establishes a relay RLC bearer corresponding to the first link according to the first configuration parameter set received from the first terminal and the second parameter set received from the network device, and establishes a unidirectional RLC bearer corresponding to the second link according to the second configuration parameter set, so that the relay device can pass the data sent by the first terminal to the second terminal.

[0101] Step 307: The relay device feeds back a response message to the first terminal, where the response message is used to inform the first terminal that the relay RLC bearer has been established.

[0102] The response message may include an identifier of the relay RLC bearer, and the identifier is used by the terminal to identify which relay RLC bearers have been established.

[0103] Optionally, in the above step 306, a unidirectional RLC bearer corresponding to the second link is established. When the relay RLC bearer corresponding to the second link is a bidirectional RLC bearer for receiving and sending data, that is, the first terminal can send data to the relay device through the second link, and the relay device can also send data to the first terminal through the second link. Before step 306, step 30a (not shown) and step 30b (not shown) may also be included.

[0104] Step 30a, the relay device sends a second request message to the network device, and the second request message is used to request a second transmission side parameter set (a set of Tx only parameters) corresponding to the relay RLC bearer corresponding to the second link. The second transmission side parameter set corresponds to the second link, and the second request message includes an identifier of the first terminal and information associated with the bidirectional RLC bearer. Among them, the identifier of the first terminal is used to inform the network device that the requested second transmission side parameter corresponds to the second link; the information associated with the bidirectional RLC bearer includes a target QoS information set, and the target QoS information set has a corresponding relationship with the relay RLC bearer.

[0105] The target QoS information set can be implemented in the following ways: 1. If the first QoS information set is a set: 1) The target QoS information set can be the first QoS information set. 2) The target QoS information set can be an information set determined according to the first QoS information set. 2. If the first QoS information set includes two sets (i.e., the first information set and the second information set): The target QoS information set is the second information set (i.e., the QoS information corresponding to the second link).

[0106] Optionally, the bidirectional RLC bearer associated information includes an identifier of a relay RLC bearer.

[0107] Optionally, the information associated with the bidirectional RLC bearer may also include RLC mode, and / or LCID corresponding to the bidirectional relay RLC bearer.

[0108] Optionally, the second request message includes an indication field for transmission side parameter configuration (such as relay_TxConfig_Request), which is used to instruct the relay device to request the network device for a second transmission side parameter set (Tx only parameter) corresponding to the relay RLC bearer corresponding to the second link.

[0109] The network device receives a second request message sent by the relay device, and based on the second request message itself, or the information carried in the second request message, or the indication field carried in the second request message, the network device determines that the Tx only parameters corresponding to these relay RLC bearers need to be configured for the relay device.

[0110] The relay device reports the target QoS information set to the network device, and the network device may configure the second sending side parameter set corresponding to the second link for the relay device according to the target QoS information set.

[0111] Step 30b: The relay device receives a second configuration message sent by the network device, where the second configuration message includes a second sending side parameter set corresponding to the relay RLC bearer corresponding to the second link.

[0112] Optionally, the second configuration message may further include an identifier of a relay RLC bearer, and the relay device may associate the second sending side parameter set with the relay RLC bearer according to the identifier of the relay RLC bearer.

[0113] Optionally, the second configuration message also includes configuration information of LCH, and the configuration information of LCH includes: priority of LCH, relevant parameters of LCP (such as logical channel priority, PBR, BSD, etc.), whether to enable HARQ feedback, SR resources associated with the LCH, the LCG to which it belongs, etc.

[0114] The second sending side parameter set includes but is not limited to: T-PollRetransmit, pollPDU, pollByte, the maximum allowed number of ARQ retransmissions in RLC AM mode, etc.

[0115] When the relay RLC bearer corresponding to the second link is a bidirectional bearer, in step 306, the relay device establishes the relay RLC bearer corresponding to the second link according to the first parameter set and the second sending side parameter set.

[0116] If the first parameter set is a set, the relay device establishes a bidirectional relay RLC bearer corresponding to the second link according to the receiving side parameters corresponding to the first parameter set (RLC configuration parameters of Tx&Rx common) and the second sending side parameter set.

[0117] If the first parameter set includes two sets, that is, the first parameter set includes a first configuration parameter set and a second configuration parameter set, the relay device establishes a bidirectional RLC bearer corresponding to the second link according to the second configuration parameter set and the second sending side parameter set, so that the relay device can send data to the first terminal through the bidirectional RLC bearer corresponding to the second link.

[0118] It should be noted that the above process is described by taking the direction of the first terminal sending data to the second terminal through the relay device as an example. In fact, when the second terminal sends data to the first terminal through the relay device, a corresponding relay RLC bearer can also be established. The above steps can also be used, but the execution subject of each step needs to be adjusted accordingly. For example, in step 302, the second terminal determines the configuration information for establishing the RLC bearer. In step 303, the second terminal sends an indication message to the relay device. In step 304, the relay device feeds back a response message to the second terminal. In step 301, the second terminal sends configuration information for establishing a DRB to the first terminal.

[0119] The timing of the above steps can be adjusted according to actual conditions. For example: the timing of step 301 is not limited; step 30a and step 304 can be in one message, such as a first request message, the first request message includes the identifier of the first terminal and the identifier of the second terminal, and the first request message is used to request the first sending side parameter set corresponding to the first link and the second sending side parameter set corresponding to the second link. Step 30b and step 305 can be in one configuration message. For example, the first configuration message contains the first sending side parameter set corresponding to the first link and the second sending side parameter set corresponding to the second link; step 307 is an optional step and may not be executed. Steps 30a and 30b are also optional steps and may not be executed. For example, when the first terminal only needs to establish a unidirectional RLC bearer, steps 30a and 30b may not be executed.

[0120] In this embodiment, the relay device receives an indication message sent by the first terminal, and the indication message includes configuration information for establishing a relay radio link control RLC bearer, and the configuration information of the relay RLC bearer includes an identifier of the relay RLC bearer and a first parameter set. The first parameter set is a configuration parameter applicable to both the sending side and the receiving side (Tx&Rx common), and the first parameter set corresponds to the first link and the second link. The configuration parameters of Tx&Rx common are parameters that the relay device and the second terminal need to understand consistently. The relay device receives a first configuration message sent by a network device, and the first configuration message includes an identifier of the relay RLC bearer, and a second parameter set corresponding to the relay RLC bearer. The second parameter set includes a first sending side parameter set corresponding to the first link, and the relay device can establish a relay RLC bearer corresponding to the first link according to the first parameter set and the second parameter set, so that the relay device can forward data sent by the first terminal to the second terminal. In this embodiment, the first terminal determines the configuration parameters of the relay RLC bearer of Tx&Rx Common that are applicable to both the relay device and the second terminal, and the configuration parameters of the relay RLC bearer corresponding to the first link and the configuration parameters of the relay RLC bearer corresponding to the second link are determined together. The configuration parameters corresponding to the first link and the second link will be well adapted, and the forwarding of service data can be better guaranteed through the relay RLC bearer.

[0121] Please refer to Figure 4, the present application embodiment provides another embodiment of a method for establishing a relay load. Figure 3 The main differences of the corresponding embodiments are as follows: 1) In the above Figure 3 In the corresponding embodiment, the first terminal determines the configuration information of the relay RLC bearer of Tx&Rx common corresponding to the first link and the second link, that is, the first terminal determines the configuration parameters of the relay RLC bearer that the relay device and the second terminal need to understand consistently; in this embodiment, the first terminal only determines the RLC configuration parameters of Tx&Rx common corresponding to the second link (also referred to as the second configuration parameter set), and the RLC configuration parameters of Tx&Rx common corresponding to the first link are obtained by the relay device from the network device. 2) In the above Figure 3 In the corresponding embodiment, the configuration information sent by the first terminal to the second terminal for establishing the DRB includes the configuration information of the RLC layer; while in this embodiment, the configuration information sent by the first terminal to the second terminal for establishing the DRB does not include the configuration information of the RLC layer.

[0122] Step 401: The first terminal sends configuration information for establishing a DRB to the second terminal, and the configuration information for establishing a DRB is forwarded to the second terminal by a relay device, that is, the relay device receives the configuration information for establishing a DRB sent by the first terminal, and forwards the configuration information to the second terminal.

[0123] The configuration information used to establish the DRB includes the DRB identifier, the configuration information of the service data adaptation SDAP layer and the configuration information of the packet data convergence protocol PDCP layer, but does not include the configuration information of the RLC layer and the configuration information of the LCH. The DRB identifier can be the index number of the DRB.

[0124] The relay RLC bearer configuration for the relay device to forward the message may be predefined by the protocol or preconfigured.

[0125] In this step Figure 3 The difference of step 301 in the corresponding embodiment is that in step 301, the configuration information for establishing the DRB includes the configuration information for the RLC layer. In this step, the configuration information for establishing the DRB does not include the configuration information for the RLC layer.

[0126] For this step, please refer to Figure 3 The corresponding step 301 in the embodiment is understood and will not be described here in detail.

[0127] Exemplarily, in this step, the purpose of the first terminal sending the configuration information for establishing DRB to the second terminal is for the second terminal to establish DRB, which has no direct connection with step 402. Therefore, the timing of step 401 is not limited, and step 401 can be executed at any position after step 402.

[0128] Step 402: The first terminal determines configuration information for establishing a relay radio link control RLC bearer, where the configuration information of the relay RLC bearer includes a second configuration parameter set corresponding to the second link.

[0129] This step and Figure 3 The difference of step 302 in the corresponding embodiment is that in step 302, the first terminal determines a first parameter set corresponding to the first link and the second link, that is, the first terminal determines the RLC configuration parameters of Tx&Rx common applicable to both the first link and the second link. In this step, the first terminal only determines the second configuration parameter set, that is, the first terminal only determines the RLC configuration parameters of Tx&Rx common corresponding to the second link.

[0130] Optionally, the configuration information of the relay RLC bearer may further include an identifier of the relay RLC bearer.

[0131] Step 403: The relay device receives an indication message sent by the first terminal, where the indication message includes configuration information for establishing a relay RLC bearer, where the configuration information of the relay RLC bearer includes an identifier of the relay RLC bearer, an identifier of the DRB associated with the relay RLC bearer, and a second configuration parameter set corresponding to the second link.

[0132] This step and Figure 3 The difference of step 303 in the corresponding embodiment is that: in step 303, the configuration information of the relay RLC bearer does not include the identifier of the wireless data bearer DRB associated with the relay RLC bearer; while in this step, the configuration information of the relay RLC bearer includes the identifier of the DRB associated with the relay RLC bearer.

[0133] Since the configuration information for establishing the DRB sent by the first terminal to the second terminal in step 401 does not include the configuration information of the RLC layer, it does not include the corresponding relationship between the DRB and the RLC entity. Therefore, the role of the identifier of the DRB associated with the relay RLC bearer is: when the relay device sends the RLC bearer configuration information corresponding to the DRB to the second terminal, the identifier of the DRB needs to be sent to the second terminal, so that the second terminal can associate the configuration information of the RLC bearer indicated by the relay device with the corresponding DRB according to the identifier of the DRB.

[0134] The configuration information of the relay RLC bearer may further include: a first QoS information set corresponding to the relay RLC bearer.

[0135] Optionally, the configuration information of the relay RLC bearer may also include: an LCID corresponding to the relay RLC bearer.

[0136] Optionally, the indication message may further include an identifier of the second terminal and / or an indication field.

[0137] For an understanding of the first QoS information set, the relay RLC bearer identifier, the second terminal identifier, and the indication field (relay_config_indication) in this step, please refer to Figure 3 The corresponding step 303 in the embodiment is understood and will not be described here.

[0138] Step 404: The relay device sends a first request message to the network device to request a target parameter set for the relay RLC bearer corresponding to the first link. The first request message includes an identifier of the second terminal and information associated with the relay RLC bearer. The identifier of the second terminal is used to inform the network device that the target parameter set corresponds to the first link. The information associated with the relay RLC bearer may include a target QoS information set, which is associated with the first QoS information set; and the target QoS information set corresponds to the relay RLC bearer. For more information about the target QoS information set, please refer to Figure 3 The corresponding step 304 in the embodiment is understood and will not be described here.

[0139] The target parameter set includes a first configuration parameter set corresponding to the first link and a first transmitting side parameter set (Tx only parameters) corresponding to the first link.

[0140] In this embodiment, the first terminal determines the second configuration parameter set corresponding to the second link (ie, RLC configuration parameters of Tx&Rxcommon), and the first configuration parameter set corresponding to the first link (ie, RLC configuration parameters of Tx&Rx common) needs to be obtained from the network device.

[0141] Optionally, the first request message may also include an identifier of the relay RLC bearer.

[0142] Optionally, the relay RLC bearer associated information may also include an RLC mode.

[0143] Optionally, the information associated with the relay RLC bearer may also include an LCID corresponding to the relay RLC bearer.

[0144] Optionally, the first request message may include an indication field for a transmission side parameter configuration (such as relay_TxALLConfig_Request), and the indication field is used to indicate that the relay device requests a first configuration parameter set and a first transmission side parameter set (Tx only parameter) for the relay RLC bearer corresponding to the first link. The network device receives the first request message sent by the relay device, and determines that the first configuration parameter set and the first transmission side parameter set corresponding to the relay RLC bearer need to be configured for the relay device based on the first request message itself or the information carried in the first request message, or the indication field carried in the first request message.

[0145] This step and Figure 3The difference of step 304 in the corresponding embodiment is that in step 304, the first request message is used to request the first transmission side parameter set corresponding to the relay RLC bearer configuration of the first link. In this embodiment, the first request message is used to request the first configuration parameter set and the first transmission side parameter set corresponding to the first link.

[0146] Step 405: The relay device receives a first configuration message sent by the network device, where the first configuration message includes a target parameter set of the relay RLC bearer corresponding to the first link.

[0147] The target parameter set includes a first configuration parameter set corresponding to the first link and a first sending side parameter set.

[0148] Optionally, the first configuration message includes an identifier of the relay RLC bearer. Based on the identifier of the relay RLC bearer in this step and the identifier of the relay RLC bearer in step 404, the relay device associates the first configuration parameter set and the first sending side parameter set configured by the network device to the relay RLC bearer corresponding to the first link.

[0149] Optionally, the first configuration message may further include an identifier of the second terminal. At this time, the relay device may determine, based on the identifier of the second terminal and the identifier of the relay RLC bearer, that the target parameter set configured by the network device is the relay RLC bearer corresponding to the first link.

[0150] Optionally, the first configuration message may also include LCH configuration information. For an understanding of LCH configuration information, please refer to Figure 3 The corresponding step 305 in the embodiment is understood and will not be described here.

[0151] For an understanding of the first sending side parameter set in this step, please refer to Figure 3 The corresponding step 305 in the embodiment is understood and will not be described here.

[0152] Step 406: Establish a relay RLC bearer corresponding to the first link according to the target parameter set.

[0153] The relay device establishes a unidirectional RLC bearer corresponding to the first link according to the target parameter set received from the network device, and establishes a unidirectional RLC bearer corresponding to the second link according to the second configuration parameter set received from the first terminal, so that the relay device can pass the data sent by the first terminal to the second terminal.

[0154] Step 407: The relay device feeds back a response message to the first terminal, where the response message is used to inform the first terminal that the relay RLC bearer has been established.

[0155] Optionally, the response message includes an identifier of a relay RLC bearer and / or an identifier of a DRB, and the identifier of the relay RLC bearer and / or the identifier of the DRB is used to inform the first terminal which relay RLC bearers have been established.

[0156] Step 408: The relay device sends a third configuration message to the second terminal, where the third configuration message includes the first configuration parameter set, an identifier of the DRB, and an identifier of the RLC bearer.

[0157] Optionally, the configuration information of the RLC bearer corresponding to the DRB may also include LCID.

[0158] The purpose of the relay device sending the configuration information of the RLC bearer corresponding to the DRB to the second terminal is to instruct the second terminal to establish the DRB. The second terminal associates the configuration information of the RLC bearer indicated by the relay device to the corresponding DRB based on the identifier of the DRB (such as the index number of the DRB). The second terminal can establish the corresponding DRB based on the configuration information of the SDAP indicated by the first terminal, the configuration information of the PDCP and the configuration information of the RLC bearer indicated by the relay device.

[0159] It is understandable that the above Figure 4 In the corresponding embodiment, the relay RLC bearer takes a unidirectional RLC bearer as an example. If the relay RLC bearer corresponding to the second link is a bidirectional RLC bearer for receiving and sending data, that is, the first terminal can send data to the relay device through the second link, and the relay device can also feed back data to the first terminal through the second link, then before step 406, the following optional steps 40a (not shown in the figure) and 40b (not shown in the figure) may also be included:

[0160] Step 40a: The relay device sends a second request message to the network device, where the second request message is used to request a second transmission side parameter set corresponding to the bidirectional RLC bearer corresponding to the second link. The second request message may include an identifier of the first terminal, an identifier of the relay RLC bearer, and a target QoS information set. The target QoS information set has a corresponding relationship with the relay RLC bearer.

[0161] Please combine this step with Figure 3 The corresponding step 30a in the embodiment can be understood and will not be described here.

[0162] Step 40b: The relay device receives a second configuration message sent by the network device, where the second configuration message includes a second sending side parameter set corresponding to the bidirectional RLC bearer corresponding to the second link.

[0163] Please combine this step with Figure 3 The corresponding step 30b in the embodiment can be understood and will not be described here.

[0164] In step 406, the relay device establishes a bidirectional relay RLC bearer corresponding to the first link according to the second configuration parameter set and the second transmission side parameter set received from the first terminal, so that the relay device can feed back data to the first terminal through the second link.

[0165] It should be noted that the above process is described by taking the direction of the first terminal sending data to the second terminal through the relay device as an example. In fact, when the second terminal sends data to the first terminal through the relay device, it can also establish a corresponding relay RLC bearer. The above steps can also be used, but the execution entity of each step needs to be adjusted accordingly. For example, in step 402, the second terminal determines the configuration information for establishing the RLC bearer; in step 403, the second terminal sends an indication message to the relay device. In step 404, the relay device feeds back a response message to the second terminal. In step 401, the second terminal sends the configuration information for establishing the DRB to the first terminal.

[0166] The timing of the above steps can be adjusted according to actual conditions. For example: the timing of step 401 is not limited; step 40a and step 404 can be in one request. Step 40b and step 405 can be in one configuration message. Step 407 is an optional step and may not be executed. Step 408 can be executed at any position after step 405. Step 40a and step 40b are also optional steps and may not be executed. For example, when the first terminal only needs to establish a unidirectional RLC bearer, step 40a and step 40b may not be executed.

[0167] In an alternative implementation, see Figure 5 As shown, step 408 may also be: the relay device sends the configuration message of the RLC bearer corresponding to the DRB (including the first configuration parameter set, the identifier of the DRB and the identifier of the RLC bearer) to the first terminal. Step 409: The first terminal further sends the configuration information to the second terminal. Optionally, step 409 and step 401 may be one message, that is, the first terminal executes step 401 only after receiving the configuration information of the RLC bearer corresponding to the DRB sent by the relay device, and uses a message (such as an RRC reconfiguration sidelink message) to inform the second terminal of the configuration message of the DRB that needs to be established. The configuration message of the DRB includes the configuration information for establishing the DRB carried in the above step 401, and the configuration information of the RLC bearer corresponding to the DRB carried in step 408.

[0168] In this embodiment, the first terminal only determines the RLC configuration parameters (second configuration parameter set) of Tx&Rx common corresponding to the second link, the relay device receives the second configuration parameter set from the first terminal, and the relay device obtains the target parameter set from the network device, the target parameter set including the RLC configuration parameters of Tx&Rx common corresponding to the first link and the first sending side parameter set. Since the transmission between the relay device and the second terminal requires the allocation of resources by the network device (such as a base station) connected to the relay device, it is more appropriate for the network device to determine the common RLC configuration parameters corresponding to the first link, which can avoid the additional complexity of the base station scheduling caused by the first terminal determining the common RLC configuration parameters. The relay device establishes a relay RLC bearer for the second link based on receiving the second configuration parameter set from the first terminal, and the relay device establishes a relay RLC bearer corresponding to the first link according to the target parameter set, so that the relay device can forward the data sent by the first terminal to the second terminal through the relay RLC bearer.

[0169] Exemplarily, in the embodiments of the present application, Figure 3 In the corresponding embodiment, step 303 and step 301 and Figure 4 In the corresponding embodiment, in step 403 and step 401, the first terminal and the relay device interact through PC5-RRC messages. This requires that when the relay device receives the message sent by the first terminal, it is necessary to distinguish which messages need to be directly forwarded to the second terminal and which need to be submitted to its own RRC layer for parsing and processing. One implementation method is that the LCIDs used by these two types of PC5-RRC messages are different. For example, the PC5-RRC message interacting between the first terminal and the second terminal (the PC5-RRC message that needs to be forwarded by the relay device) uses the first LCID (such as A, B, C), etc. The PC5-RRC message directly interacting between the first terminal and the relay device (the PC5-RRC message that needs to be submitted to its own RRC layer for parsing and processing) uses the second LCID (such as A', B', C'), etc. The first LCID (such as A, B, C) and the second LCID (such as A', B', C') can be predefined by the protocol or preconfigured. The relay device can determine the processing method for the corresponding PC5-RRC by identifying the first LCID and the second LCID.

[0170] Exemplarily, in an embodiment of the present application, for the same relay RLC bearer, the identifier of the relay RLC bearer carried in the indication message received by the relay device and the identifier of the relay RLC bearer reported by the relay device to the network device are used to indicate the same relay RLC bearer, but the representation method may be different. The identifier of the relay RLC bearer takes the index number as an example. For example, in step 303 (or step 403) and step 304 (or step 404), for a relay RLC bearer corresponding to an SL-DRB, the relay RLC bearer index number carried in the indication message in step 304 (or step 404) and the RLC bearer index number carried in the request of step 304 (or step 404) may be different. For example, for a relay RLC bearer corresponding to an SL-DRB, the RLC bearer index number carried in the indication message in step 303 (or step 403) is "1", and the RLC bearer index number reported by the relay device to the network device in the request message in step 304 (or step 404) is "2". The relay device only needs to determine the correspondence between the relay RLC bearer index number indicated by the first terminal and the RLC bearer index number reported to the network device.

[0171] It should be noted that the order of each step can be adjusted in the embodiments of the present application for implementation, and the present application does not limit this. It should be understood that executing some of the steps in the diagram or adjusting the order of the steps for specific implementation all fall within the scope of protection of the present application.

[0172] Corresponding to the method provided in the above method embodiment, the present application embodiment also provides a corresponding device, which includes a module for executing the corresponding module of the above embodiment. The module can be software, hardware, or a combination of software and hardware.

[0173] See also Figure 6 As shown, an embodiment of the present application provides a communication device 600. In one possible design, the device may be a relay device, or may also be a chip, a chip system, or a processor that supports the relay device to implement the above method. The device may be used to implement the method performed by the relay device in the above method embodiment. For details, please refer to the description in the above method embodiment. In one possible design, the device may be a terminal, or may also be a chip, a chip system, or a processor that supports the terminal to implement the above method. The device may be used to implement the method performed by the first terminal in the above method embodiment. For details, please refer to the description in the above method embodiment.

[0174] The device 600 may include one or more processors 601, which may also be referred to as a processing unit, and may implement certain control functions. The processor 601 may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and the communication data, and the central processing unit may be used to control the communication device (e.g., a base station, a baseband chip, a terminal, a terminal chip, a DU or a CU, etc.), execute the software program, and process the data of the software program.

[0175] In an optional design, the processor 601 may also store instructions and / or data 603, and the instructions and / or data 603 can be executed by the processor so that the device 600 executes the method described in the above method embodiment.

[0176] In another optional design, the processor 601 may include a transceiver unit for implementing the receiving and sending functions. For example, the transceiver unit may be a transceiver circuit, or an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing the receiving and sending functions may be separate or integrated. The above-mentioned transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or the above-mentioned transceiver circuit, interface, or interface circuit may be used for transmitting or delivering signals.

[0177] In yet another possible design, the apparatus 600 may include a circuit, which may implement the functions of sending, receiving, or communicating in the above method embodiments.

[0178] Optionally, the device 600 may include one or more memories 602, on which instructions 604 may be stored, and the instructions may be executed on the processor so that the device 600 performs the method described in the above method embodiment. Optionally, data may also be stored in the memory. Optionally, instructions and / or data may also be stored in the processor. The processor and memory may be provided separately or integrated together.

[0179] Optionally, the device 600 may further include a transceiver 605 and / or an antenna 606. The processor 601 may be referred to as a processing unit, which controls the device 600. The transceiver 605 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, a transceiver device or a transceiver module, etc., which is used to implement a transceiver function.

[0180] Optionally, the device 600 in the embodiment of the present application can be used to execute the embodiment of the present application Figure 3-Figure 5 Alternatively, the apparatus 600 in the embodiment of the present application can be used to execute the method executed by the relay device in the embodiment of the present application. Figure 3-Figure 5 A method executed by the first terminal in .

[0181] like Figure 7 As shown, another embodiment of the present application provides a communication device 700. The device 700 may include: a processing module 702 (or a processing unit). Optionally, it may also include a transceiver module 701 (or a transceiver unit) and / or a storage module 703 (or a storage unit).

[0182] In one possible design, Figure 7 One or more modules in the may be implemented by one or more processors, or by one or more processors and memories; or by one or more processors and transceivers; or by one or more processors, memories and transceivers, which are not limited in the embodiments of the present application. The processor, memory, and transceiver may be provided separately or integrated.

[0183] The device has the function of implementing the relay device described in the embodiment of the present application. For example, the device includes a module or unit or means corresponding to the steps involved in the relay device described in the embodiment of the present application. The function or unit or means can be implemented by software, or by hardware, or by hardware executing the corresponding software implementation, or by a combination of software and hardware. For details, please refer to the corresponding description in the aforementioned corresponding method embodiment. Alternatively, the device has the function of implementing the first terminal described in the embodiment of the present application. For example, the device includes a module or unit or means corresponding to the steps involved in the terminal described in the embodiment of the present application by the first terminal. The function or unit or means can be implemented by software, or by hardware, or by hardware executing the corresponding software implementation, or by a combination of software and hardware. For details, please refer to the corresponding description in the aforementioned corresponding method embodiment.

[0184] In an optional implementation, each module in the communication device 700 in the embodiment of the present application can be used to execute the embodiment of the present application. Figure 3-Figure 5 The method is performed by the relay device.

[0185] In one possible design, the device 700 may include: a processing module 702 and a transceiver module 701.

[0186] The transceiver module 701 is configured to receive an indication message sent by a first terminal, where the indication message includes configuration information for establishing a relay radio link control RLC bearer, where the configuration information of the relay RLC bearer includes a first parameter set;

[0187] The transceiver module 701 is further configured to receive a first configuration message sent by a network device, where the first configuration message includes a second parameter set corresponding to the relay RLC bearer;

[0188] The processing module 702 is used to establish a relay RLC bearer corresponding to a first link according to a first parameter set and a second parameter set, where the first link is a link between a relay device and a second terminal, and the first link is used for data transmission between the first terminal and the second terminal.

[0189] Furthermore, the transceiver module 701 is used to execute Figure 3 Corresponding steps 303, 304, 305, 307, 30a, and 30b. Figure 3 The descriptions of step 303, step 304, step 305, step 307, step 30a, and step 30b in the corresponding method embodiment are not repeated here. The processing module 702 is used to execute Figure 3 Corresponding step 306. For details, please refer to the above Figure 3 The corresponding step 306 in the method embodiment is not described in detail here.

[0190] In one possible design:

[0191] The transceiver module 701 is configured to receive a first configuration message sent by a network device, where the first configuration message includes a target parameter set of a relay RLC bearer corresponding to a first link;

[0192] The processing module 702 is used to establish a relay RLC bearer corresponding to a first link according to a target parameter set, where the first link is a link between a relay device and a second terminal, and the first link is used for data transmission between the first terminal and the second terminal.

[0193] Furthermore, the transceiver module 701 is used to execute Figure 4 and Figure 5 Corresponding steps 403, 404, 405, 407, 408, 40a, 40b, and 409. For details, please refer to the above Figure 4 and Figure 5 The descriptions of step 403, step 404, step 405, step 407, step 408, step 40a, step 40b and step 409 in the corresponding method embodiment are not repeated here. The processing module 702 is used to execute Figure 4 and Figure 5 Corresponding step 406. Please refer to the above Figure 4 and Figure 5 The corresponding step 406 in the method embodiment is not described in detail here.

[0194] In an optional implementation, each module in the apparatus 700 in the embodiment of the present application can be used to execute the embodiment of the present application. Figure 3-Figure 5 A method executed by the first terminal in .

[0195] In one possible design, a communication device 700 may include: a processing module 702 and a transceiver module 701.

[0196] The processing module 702 is used to determine configuration information for establishing a relay RLC bearer, where the configuration information of the relay RLC bearer includes a first parameter set;

[0197] The transceiver module 701 is used to send configuration information for establishing a relay RLC bearer to a relay device.

[0198] Furthermore, the processing module 702 is used to execute Figure 3 In the corresponding method embodiment, step 302, Figure 4 and Figure 5 For the corresponding step 402 in the method embodiment, please refer to the description in the above method embodiment for details, which will not be repeated here. The transceiver module 701 is used to execute the above Figure 3 Step 301 and step 303 in Figure 4 and Figure 5 For the corresponding steps 401 and 403 in the method embodiment, please refer to the description in the above method embodiment for details, which will not be repeated here.

[0199] The present application also provides a computer-readable medium on which a computer program is stored. When the computer program is executed by a computer, the functions of any of the above method embodiments are implemented.

[0200] The present application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0201] In this application, elements expressed in the singular are intended to mean "one or more" rather than "one and only one", unless otherwise specified. In this application, "at least one" is intended to mean "one or more", and "more than one" is intended to mean "two or more", unless otherwise specified.

[0202] It can be understood that in each embodiment of the present application, "when", "if" and "if" all mean that the device will make corresponding processing under certain objective circumstances, but it does not limit the time, nor does it require that the device must have a judgment action when it is implemented, nor does it mean that there are other limitations.

[0203] It can be understood that in each embodiment of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0204] For example, in each embodiment of the present application, the so-called “parameter set” may be understood as a group of parameters, or may be understood as one or more parameters.

[0205] In another possible design, when the device is a chip in a terminal, the chip includes: a processing unit and a communication unit, the processing unit may be, for example, a processor, and the communication unit may be, for example, an input / output interface, a pin or a circuit, etc. The processing unit may execute computer-executable instructions stored in the storage unit so that the chip in the terminal executes the wireless communication method of any one of the above-mentioned first aspects. Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, etc., and the storage unit may also be a storage unit in the terminal located outside the chip, 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.

[0206] Among them, the processor mentioned in any of the above places can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the program execution of the wireless communication method of the first aspect mentioned above.

[0207] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0208] In the several embodiments provided in the present 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 only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as 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 mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0209] 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 distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0210] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0211] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk.

[0212] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A method for establishing a relay, characterized in that: include: Receiving an indication message sent by a first terminal, where the indication message includes a first parameter set for establishing a relay radio link control RLC bearer; Receiving a first configuration message sent by a network device, where the first configuration message includes a second parameter set corresponding to the relay RLC bearer; A relay RLC bearer corresponding to a first link is established according to the first parameter set and the second parameter set, where the first link is a link between a relay device and a second terminal, and the first link is used for data transmission between the first terminal and the second terminal.

2. The method according to claim 1, characterized in that: The indication message also includes a first quality of service QoS information set; before receiving the first configuration message sent by the network device, the method also includes: A first request message is sent to a network device to request a first configuration message of the relay RLC bearer; the first request message includes a target QoS information set; wherein the target QoS information set is associated with the first QoS information set; the target QoS information set is in a corresponding relationship with the relay RLC bearer corresponding to the first link.

3. The method according to claim 1, characterized in that The first parameter set includes a first configuration parameter set corresponding to the first link and a second configuration parameter set corresponding to a second link, where the second link is a link between the first terminal and the relay device; The establishing a relay RLC bearer corresponding to the first link according to the first parameter set and the second parameter set includes: A relay RLC bearer corresponding to the first link is established according to the first configuration parameter set and the second parameter set, and a relay RLC bearer corresponding to the second link is established according to the second configuration parameter set.

4. The method according to claim 3, characterized in that The first configuration parameter set and the second configuration parameter set are the same configuration parameter set.

5. The method according to claim 1, characterized in that: The method further comprises: Receive a configuration message for establishing a wireless data bearer DRB sent by the first terminal, wherein the configuration message for establishing the DRB includes an identifier of the DRB, configuration information of a service data adaptation SDAP layer, configuration information of a packet data convergence protocol PDCP layer, and configuration information of an RLC layer, and the relay RLC bearer includes a correspondence between a relay RLC entity and a DRB; Forward the configuration message for establishing a radio data bearer DRB to the second terminal.

6. The method according to claim 1, characterized in that The method further comprises: receiving a second configuration message sent by the network device, where the second configuration message includes a second sending side parameter set corresponding to a relay RLC bearer corresponding to a second link; the second link is a link between the first terminal and the relay device; The method further comprises: A relay RLC bearer corresponding to the second link is established according to the first parameter set and the second sending side parameter set, and the relay RLC bearer is a bidirectional RLC bearer.

7. The method according to claim 6, characterized in that Before receiving the second configuration message sent by the network device, the method further includes: A second request message is sent to the network device to request the second sending side parameter set corresponding to the relay RLC bearer corresponding to the second link; the second request message includes a target QoS information set; wherein the target QoS information set has a corresponding relationship with the relay RLC bearer corresponding to the second link.

8. The method according to claim 2, characterized in that: The first QoS information set is the QoS information set corresponding to data transmitted from the first terminal to the second terminal; the target QoS information set is the first QoS information set; or, the target QoS information set is the information set determined by the relay device based on the first QoS information set.

9. The method according to claim 2, characterized in that: The first QoS information set includes a first information set and a second information set, the first information set is a QoS information set corresponding to when the relay device transmits data through the first link, and the second information set is a QoS information set corresponding to when the first terminal transmits data through the second link; the target QoS information set is an information set determined by the relay device according to the second information set; Alternatively, the target QoS information set is the first information set, and the second link is a link between the first terminal and the relay device.

10. A method for establishing a relay, characterized in that: include: Receiving a first configuration message sent by a network device, where the first configuration message includes a target parameter set of a relay RLC bearer corresponding to the first link; Receive an indication message sent by the first terminal, the indication message including configuration information for establishing the relay RLC bearer, the configuration information of the relay RLC bearer including an identifier of the relay RLC bearer, an identifier of a radio data bearer DRB associated with the relay RLC bearer, and a second configuration parameter set; the relay RLC bearer includes a correspondence between a relay RLC entity and the DRB; the second configuration parameter set is configuration parameters corresponding to a second link, and the second link is a link between the first terminal and the relay device; Establishing a relay RLC bearer corresponding to the first link according to the target parameter set, where the first link is a link between a relay device and a second terminal, and the first link is used for data transmission between the first terminal and the second terminal; A relay RLC bearer corresponding to the second link is established according to the second configuration parameter set.

11. The method according to claim 10, characterized in that The target parameter set includes a first configuration parameter set corresponding to the first link and a first sending side parameter set corresponding to the first link.

12. The method according to claim 10, characterized in that The indication message includes a first quality of service QoS information set; before receiving the first configuration message sent by the network device, the method further includes: A first request message is sent to a network device to request a target parameter set of the relay RLC bearer; the first request message includes a target QoS information set; wherein the target QoS information set is associated with the first QoS information set; the target QoS information set is in a corresponding relationship with the relay RLC bearer corresponding to the first link.

13. The method according to claim 10, characterized in that The method further comprises: receiving a second configuration message sent by the network device, where the second configuration message includes a second sending side parameter set corresponding to a relay RLC bearer corresponding to the second link, where the relay RLC bearer is a bidirectional RLC bearer; A relay RLC bearer corresponding to the second link is established according to the second sending side parameter set and the second configuration parameter set.

14. The method according to claim 13, characterized in that The method further comprises: A second request message is sent to the network device to request a second sending side parameter set corresponding to the bidirectional RLC bearer corresponding to the second link; the second request message includes a target QoS information set; wherein the target QoS information set has a corresponding relationship with the relay RLC bearer corresponding to the second link.

15. The method according to claim 11, characterized in that The method further comprises: A configuration message of the RLC bearer corresponding to the DRB is sent to the second terminal, wherein the configuration message of the RLC bearer includes the first configuration parameter set, the identifier of the DRB and the identifier of the RLC bearer.

16. The method according to any one of claims 11 to 15, characterized in that The method further comprises: Receiving a configuration message for establishing a DRB sent by the first terminal, where the configuration message for establishing the DRB includes an identifier of the DRB, configuration information of a service data adaptation SDAP layer, and configuration information of a packet data convergence protocol PDCP layer; Forward the configuration message for establishing a radio data bearer DRB to the second terminal.

17. The method according to claim 11, characterized in that The method further comprises: The first configuration parameter set is sent to the first terminal; the first configuration parameter set is sent by the first terminal to the second terminal.

18. A method for establishing a relay, characterized in that: include: Determine configuration information for establishing a relay radio link control RLC bearer, where the configuration information of the relay RLC bearer includes an identifier of the relay RLC bearer and a first parameter set, where the first parameter set includes a first configuration parameter set corresponding to a first link and a second configuration parameter set corresponding to a second link, where the first link is a link between a relay device and a second terminal, and the second link is a link between the first terminal and the relay device; The configuration information of the relay RLC bearer is sent to the relay device.

19. The method according to claim 18, characterized in that The first configuration parameter set and the second configuration parameter set are the same configuration parameter set.

20. The method according to claim 18, characterized in that The first parameter set corresponds to a second link, and the second link is a link between the first terminal and the relay device.

21. The method according to any one of claims 18 to 20, characterized in that The configuration information also includes a first QoS information set, where the first QoS information set is a QoS information set corresponding to data transmission from the first terminal to the second terminal.

22. The method according to claim 21, characterized in that The first QoS information set includes a first information set and a second information set, the first information set is the QoS information set corresponding to when the relay device transmits data through the first link, the second information set is the QoS information set corresponding to when the first terminal transmits data through the second link, and the second link is the link between the first terminal and the relay device.

23. A communication device, characterized in that: The device comprises a processor coupled to at least one memory, wherein the processor is used to read a computer program stored in the at least one memory so that the device executes the method described in any one of claims 1 to 9, or the method described in any one of claims 10 to 17, or the method described in any one of claims 18 to 22.

24. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store a computer program. When the computer program is run on a computer, the computer executes the method as described in any one of claims 1 to 9; or the computer executes the method as described in any one of claims 10 to 17; or the computer executes the method as described in any one of claims 18 to 22.

25. A chip, characterized in that: It comprises a processor and a communication interface, wherein the processor is used to read instructions to execute the method as described in any one of claims 1-9; or, the processor is used to read instructions to execute the method as described in any one of claims 10-17; or, the processor is used to read instructions to execute the method as described in any one of claims 18-22.

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