Communication method and device

Abstract

The invention discloses a communication method and device, and the method comprises the steps: a terminal reports the backward compatibility information of a quality of service flow to access network equipment, and the access network equipment determines the configuration of an SLRB according to the backward compatibility information of the quality of service flow reported by the terminal, and transmits the configuration of the SLRB to the terminal. When the SLRB is configured for the terminal, backward compatibility information of different service quality flows is considered, for example, a plurality of service quality flows with the same backward compatibility can be configured and mapped to one SLRB, and the SL communication quality is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular, to a communication method and device. Background Art

[0002] In a wireless communication system, two terminals can communicate directly without the help of network equipment. The link between terminals is called a side link (SL). A typical application scenario of SL communication is vehicle to everything (V2X). In the vehicle networking scenario, each vehicle can be considered as a terminal, and data can be transmitted directly between vehicles without going through network equipment, which can effectively reduce communication delays. How access network equipment configures a sidelink radio bearer (SLRB) for communication for the terminal is a research direction. Summary of the invention

[0003] The embodiments of the present application provide a communication method and apparatus to configure SLRB for a terminal.

[0004] In a first aspect, a communication method is provided, wherein the execution subject of the method is a terminal, or a module in the terminal (for example, a chip or a circuit, etc.), comprising: sending first indication information, wherein the first indication information is used to indicate backward compatibility information of a first service quality flow; receiving configuration information of a first sidelink radio bearer SLRB, wherein the configuration information of the first SLRB is associated with the first service quality flow, and the configuration information of the first SLRB is determined based on the backward compatibility information of the first service quality flow.

[0005] Through the above design, the terminal uses the service quality flow as the granularity to determine whether each service quality flow needs backward compatibility, and reports to the access network device whether each service quality flow needs backward compatibility, so that the access network device can consider the backward compatibility of different service quality flows when configuring the mapping relationship between the service quality flow and the SLRB. For example, the access network device can map the service quality flow configuration with the same backward compatibility to one SLRB, and avoid mapping the service quality flow configuration with different backward compatibility to one SLRB, so as to ensure that the SL data meets the backward compatibility requirements indicated by the upper layer when transmitting in the AS, and improve the quality of SL communication.

[0006] In one design, the configuration information of the first SLRB includes second indication information, and the second indication information is used to indicate backward compatibility information of the first SLRB.

[0007] In one design, it also includes: determining backward compatibility information of the first SLRB based on the backward compatibility information of the first service quality flow.

[0008] In one design, before sending the first indication information, the method further includes: determining the first indication information according to a transmission file of the first quality of service flow, where the transmission file of the first quality of service flow is used to indicate backward compatibility information of the first quality of service flow.

[0009] In one design, it also includes: obtaining a transmission file of the first service quality stream from an upper layer.

[0010] In one design, the backward compatibility information is used to indicate whether backward compatibility is required or not.

[0011] The second aspect is a counterpart method of the first aspect. For the beneficial effects, please refer to the description of the first aspect. A communication method is provided. The executor of the method is an access network device, or a module in the access network device (such as a chip or circuit, etc.), or a logical node, logical module or software that fully or partially implements the functions of the access network device, including: receiving first indication information, the first indication information is used to indicate backward compatibility information of a first service quality flow; determining configuration information of a first sidelink radio bearer SLRB according to the backward compatibility information of the first service quality flow, the configuration information of the first SLRB is associated with the first service quality flow; and sending the configuration information of the first SLRB.

[0012] In one design, the configuration information of the first SLRB includes second indication information, and the second indication information is used to indicate backward compatibility information of the first SLRB.

[0013] In one design, backward compatibility information of the first SLRB is determined based on backward compatibility information of the first quality of service flow.

[0014] In one design, the first indication information is determined according to a transmission file of the first quality of service flow, and the transmission file of the first quality of service flow is used to indicate backward compatibility information of the first quality of service flow.

[0015] In one design, the transport file for the first quality of service flow is obtained from an upper layer.

[0016] In one design, the backward compatibility information is used to indicate whether backward compatibility is required or not.

[0017] According to a third aspect, a communication method is provided, wherein the execution subject of the method is a terminal, or a module in the terminal (for example, a chip or a circuit, etc.), comprising: determining a first carrier according to backward compatibility information of a first quality of service flow; sending first indication information, wherein the first indication information is used to indicate the first carrier; receiving configuration information of a first sidelink radio bearer SLRB, wherein the configuration information of the first SLRB is associated with the first quality of service flow, and the configuration information of the first SLRB is determined according to the first carrier.

[0018] Through the above design, the terminal reports the carrier information corresponding to each service quality flow to the access network device at the granularity of service quality flow. The access network device considers the carrier information corresponding to each service quality flow to configure the carrier information of SLRB for the terminal. For example, it avoids supporting the service quality flow with which the carrier configured for SLRB is associated or mapped, thereby ensuring the backward compatibility requirements of the service quality flow in the transmission at the AS layer, thereby improving the SL communication quality.

[0019] In one design, the first service quality flow includes one or more service quality flows, and the first carrier is determined according to the backward compatibility information of the first service quality flow, including: the backward compatibility information of one service quality flow in the first service quality flow indicates that backward compatibility is required, and the first carrier is a preset carrier; or, the backward compatibility information of the first service quality flow all indicates that backward compatibility is not required, and the first carrier is determined according to the second carrier corresponding to the first service quality flow.

[0020] In one design, the method further includes determining backward compatibility information of the first quality of service flow based on a transmission file of the first quality of service flow.

[0021] In one design, it also includes: obtaining a transmission file of the first service quality stream from an upper layer.

[0022] In one design, the backward compatibility information is used to indicate whether backward compatibility is required or not.

[0023] The fourth aspect is a counterpart method of the third aspect. For the beneficial effects, please refer to the description of the third aspect. A communication method is provided. The executor of the method is an access network device, or a module in the access network device (such as a chip or circuit, etc.) or a logical node, logical module or software that fully or partially implements the functions of the access network device, including: receiving first indication information, the first indication information is used to indicate a first carrier, and the first carrier is determined based on the backward compatibility information of the first service quality flow; according to the first carrier, determining the configuration information of the first sidelink radio bearer SLRB, and the configuration information of the first SLRB is associated with the first service quality flow; sending the configuration information of the first SLRB.

[0024] In one design, the first service quality flow includes one or more service quality flows: the backward compatibility information of one of the first service quality flows indicates that backward compatibility is required, and the first carrier is a preset carrier; or, the backward compatibility information of the first service quality flows all indicates that backward compatibility is not required, and the first carrier is determined according to the second carrier corresponding to the first service quality flow.

[0025] In one design, backward compatibility information for the first quality of service flow is determined based on a transport file for the first quality of service flow.

[0026] In one design, the transport file for the first quality of service flow is obtained from an upper layer.

[0027] In one design, the backward compatibility information is used to indicate whether backward compatibility is required or not.

[0028] In a fifth aspect, a communication method is provided, the execution subject of the method is a terminal, or a module in the terminal (for example, a chip or a circuit, etc.), including: establishing a first SLRB according to the configuration information of the first SLRB, the configuration information of the first SLRB is associated with the first service quality flow; establishing a second SLRB according to the backward compatibility information of the first service quality flow and the backward compatibility information of the first SLRB.

[0029] Through the above design, the backward compatibility of the service quality flow is different from the backward compatibility of the configured and established SLRB, which triggers the establishment of a new SLRB. The backward compatibility of the newly established SLRB is the same as the backward compatibility of the service quality flow, thereby ensuring that the backward compatibility of the service quality flow is the same as the SLRB to which it is mapped, ensuring that the SL data transmission in the AS can meet the backward compatibility requirements indicated by the upper layer, thereby improving the SL communication quality.

[0030] In one design, a second SLRB is established based on backward compatibility information of the first quality of service flow and backward compatibility information of the first SLRB, including: if the backward compatibility information of the first quality of service flow is different from the backward compatibility information of the first SLRB, the second SLRB is established.

[0031] In one design, it also includes: determining the backward compatibility information of the first SLRB based on the backward compatibility information included in the configuration information of the first SLRB; or determining the backward compatibility information of the first SLRB based on the backward compatibility information of the service quality flow associated with the first SLRB.

[0032] In one design, the method further includes determining backward compatibility information of the first quality of service flow based on a transmission file of the first quality of service flow.

[0033] In one design, it also includes: obtaining a transmission file of the first service quality stream from an upper layer.

[0034] In one design, the backward compatibility information is used to indicate whether backward compatibility is required or not.

[0035] In a sixth aspect, a communication method is provided, the execution subject of the method being a terminal, or a module in the terminal (for example, a chip or a circuit, etc.), including: obtaining configuration information of a first sidelink radio bearer SLRB, the configuration information of the first SLRB being associated with a first service quality flow; determining a second carrier corresponding to the first SLRB according to backward compatibility information of the first service quality flow.

[0036] Through the above design, the carrier information of the first SLRB is determined according to the backward compatibility information of the first service quality flow associated with the first SLRB, which can ensure the transmission of the service quality flow carried or associated on the first SLRB, meet the backward compatibility requirements indicated by the upper layer, and improve the SL communication quality.

[0037] In one design, the first service quality flow includes one or more service quality flows, and the second carrier corresponding to the first SLRB is determined based on the backward compatibility information of the first service quality flow, including: the backward compatibility information of one service quality flow in the first service quality flow indicates that backward compatibility is required, and the second carrier is a preset carrier; or, the backward compatibility information of the first service quality flow indicates that backward compatibility is not required, and the second carrier is determined based on the first carrier corresponding to the first service quality flow.

[0038] In one design, the method further includes determining backward compatibility information of the first quality of service flow based on a transmission file of the first quality of service flow.

[0039] In one design, it also includes: obtaining a transmission file of the first service quality stream from an upper layer.

[0040] In one design, the backward compatibility information is used to indicate whether backward compatibility is required or not.

[0041] In a seventh aspect, a communication method is provided, the execution subject of the method is a terminal, or a module (e.g., a chip or circuit, etc.) in the terminal, comprising: determining backward compatibility information of a logical channel LCH with the highest priority of a first destination; selecting a first LCH according to the backward compatibility information of the logical channel LCH with the highest priority of the first destination and the backward compatibility information of the first LCH. Optionally, the first LCH may be the LCH of the first destination.

[0042] Through the above design, when selecting a certain LCH according to the LCH with the highest priority, the backward compatibility information of the LCH is considered. For example, if the backward compatibility information of the LCH is the same as that of the LCH with the highest priority, then the LCH is selected. This can ensure that the backward compatibility information of the LCH multiplexed on the same TB for transmission is consistent. The SL data transmitted at the AS layer can ensure the backward compatibility requirements of the LCH layer and improve the SL communication quality.

[0043] In one design, the first LCH is selected based on the backward compatibility information of the highest priority LCH of the first destination and the backward compatibility information of the first LCH, including: if the backward compatibility information of the highest priority LCH of the first destination is the same as the backward compatibility information of the first LCH, the first LCH is selected.

[0044] In one design, the backward compatibility information of the highest priority LCH of the first destination and / or the backward compatibility information of the first LCH is determined in the following manner: according to the backward compatibility configuration included in the configuration information of the LCH; or, according to the backward compatibility information of the service quality flow associated with the LCH.

[0045] In one design, after selecting the first LCH, the method further includes: generating a first transport block TB according to the highest priority LCH and the first LCH.

[0046] In one design, it also includes: the backward compatibility information of at least one LCH in the LCH corresponding to the first TB indicates that backward compatibility is not required, and the first TB can perform cross-carrier scheduling and / or SL cross-carrier feedback.

[0047] In one design, the backward compatibility information is used to indicate whether backward compatibility is required or not.

[0048] In an eighth aspect, a device is provided, which can implement the method of the first aspect, the third aspect, the fifth aspect, the sixth aspect or the seventh aspect. For example, the device includes means corresponding to the first aspect, the third aspect, the fifth aspect, the sixth aspect or the seventh aspect. The device can be implemented by hardware, software or by executing the corresponding software implementation by hardware.

[0049] In one design, the apparatus includes a unit that performs the first, third, fifth, sixth, or seventh aspects described above.

[0050] In one design, the device includes a processor and a memory, and the processor is used to execute a computer program or instructions stored in the memory, so that the device implements the method of the first aspect, the third aspect, the fifth aspect, the sixth aspect or the seventh aspect mentioned above.

[0051] In one design, the device includes a processor and an interface circuit, the interface circuit is used to receive signals from other devices outside the device and transmit them to the processor or send signals from the processor to other devices outside the device, and the processor is used to implement the above-mentioned first, third, fifth, sixth or seventh aspects of the method through logic circuits or execution code instructions.

[0052] In a ninth aspect, a device is provided, which can implement the method of the second aspect or the fourth aspect. For example, the device includes means for executing the corresponding method of the second aspect or the fourth aspect. The device can be implemented by hardware, software, or by executing the corresponding software implementation by hardware.

[0053] In one design, the apparatus includes a unit for performing the second aspect or the fourth aspect described above.

[0054] In one design, the device includes a processor and a memory, and the processor is used to execute a computer program or instructions stored in the memory, so that the device implements the method of the second aspect or the fourth aspect above.

[0055] In one design, the device includes a processor and an interface circuit, the interface circuit is used to receive signals from other devices outside the device and transmit them to the processor or send signals from the processor to other devices outside the device, and the processor is used to implement the method in the second or fourth aspect above through logic circuits or executing code instructions.

[0056] In a tenth aspect, a computer-readable storage medium is provided, storing a computer program or instruction. When the computer program or instruction is executed on a computer, the computer implements the method of any one of the first to seventh aspects.

[0057] In an eleventh aspect, a computer program product is provided, comprising a computer program or instructions, which, when executed by a computer, enables the method of any one of the first to seventh aspects to be executed.

[0058] In the twelfth aspect, a chip is provided, comprising a processor, wherein the processor is coupled to a memory and is used to execute a computer program or instruction stored in the memory, so that the chip implements the method of any one of the first to seventh aspects above.

[0059] In the thirteenth aspect, a communication system is provided, including: a first communication device and a second communication device; wherein the first communication device is used to implement the method of the first, third, fifth, sixth or seventh aspect above, and the second communication device is used to implement the method of the second or fourth aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 A schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0061] Figure 2 A schematic diagram of a protocol stack structure provided in an embodiment of the present application;

[0062] Figure 3A schematic diagram of a SLRB provided in an embodiment of the present application;

[0063] Figure 4 A schematic diagram of a process provided for an embodiment of the present application;

[0064] Figure 5 Another schematic diagram of a process flow provided in an embodiment of the present application;

[0065] Figure 6 Another schematic diagram of a process provided for an embodiment of the present application;

[0066] Figure 7 Another schematic diagram of a process flow provided in an embodiment of the present application;

[0067] Figure 8 Another schematic diagram of a process provided for an embodiment of the present application;

[0068] Fig. 9 A schematic diagram of a structure of a device provided in an embodiment of the present application;

[0069] Fig.10 This is another schematic diagram of the structure of the device provided in the embodiment of the present application. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The specific operation methods, functional descriptions, etc. in the method embodiments can also be applied to the device embodiments or system embodiments.

[0071] Figure 1 A possible, non-limiting system schematic is shown. Figure 1 As shown, the communication system 10 includes a radio access network (RAN) 100 and a core network (CN) 200. Optionally, the Internet 300 is also included.

[0072] The RAN 100 includes at least one RAN node (eg, Figure 1 110) and at least one terminal (e.g., Figure 1 120a and 120b in the figure may be collectively referred to as 120). RAN100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment ( Figure 1 not shown).

[0073] RAN100 may be a cellular system related to the 3rd generation partnership project (3GPP), for example, a 4th generation (4G) mobile communication system, a 5th generation (5G) mobile communication system, or a future-oriented evolution system, for example, a 6th generation (6G) mobile communication system. RAN100 may also be an open access network (open RAN, O-RAN or ORAN), a cloud radio access network (cloud radio access network, CRAN), or a wireless fidelity (wireless fidelity, WiFi) system. RAN 100 may also be a communication system that integrates two or more of the above systems.

[0074] The RAN node 110, which may also be sometimes referred to as an access network device, a RAN entity or an access node, etc., constitutes a part of the communication system to help the terminal achieve wireless access. In the subsequent description of this application, unless otherwise specified, the "access network device" is used for description. The multiple RAN nodes 110 in the communication system 10 can be nodes of the same type or nodes of different types. The RAN node 110 and the terminal 120 are sometimes referred to as communication devices, for example Figure 1 The network element 110 may be understood as a communication device having a base station function, and the network elements 120a and 120b may be understood as communication devices having a terminal function.

[0075] In one possible scenario, the RAN node may be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a next generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. The RAN node may be a macro base station, a micro base station or an indoor station, a relay node or a donor node, or a wireless controller in a CRAN scenario. Optionally, the RAN node may also be a server, a wearable device, a vehicle or an on-board device, etc. For example, the access network device in the vehicle to everything (V2X) technology may be a road side unit (RSU). All or part of the functions of the RAN node in the embodiment of the present application may also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (e.g., a cloud platform). The RAN node in the embodiment of the present application may also be a logical node, a logical module, or software that can implement all or part of the functions of the RAN node.

[0076] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU) or a remote radio head (RRH).

[0077] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, CU, CU-CP, CU-UP, DU and RU are described as examples in this application. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0078] The terminal 120 may also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. The terminal can be widely used in various scenarios, for example, device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality (VR), augmented reality (AR), industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal may be a mobile phone, a head-mounted display device, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. The embodiments of the present application do not limit the device form of the terminal.

[0079] The terminal 120 can be connected to the RAN node 110 in a wireless manner. The interface between the terminal 120 and the RAN node 110 is a Uu interface. The RAN node 110 is connected to the core network 200 in a wireless or wired manner. The core network device in the core network 200 and the RAN node 110 in the RAN 100 can be different physical devices, or they can be the same physical device that integrates the core network device logical functions and the radio access network logical functions.

[0080] Terminal 120a and terminal 120b can communicate directly. The interface between terminal 120a and terminal 120b is called a prose communication 5 (PC5) interface. The link between terminal 120a and terminal 120b is called a side link (SL). SL can support unicast, multicast or broadcast, etc. Figure 1 As shown, terminal 120a serves as a transmitting (transmitter, TX) UE, and terminal 120b serves as a receiving (receiver, RX) UE. The TX UE can obtain SL resources, and based on the SL resources, send SL information to the RX UE.

[0081] [Protocol stack structure]

[0082] The communication between terminals follows a certain protocol stack structure. The protocol stack structure includes the control plane protocol stack structure and the user plane protocol stack structure. Taking the user plane protocol stack structure as an example, Figure 2 As shown in the figure, the user plane protocol stack structure includes: upper layer and access stratum (AS) layer. The upper layer can also be called vehicle to everything (V2X) layer, Prose layer, PC5-signaling (PC5-S) layer. The access layer, from top to bottom, includes: service data adaptation protocol (SDAP) layer, packet data convergence protocol (PDCP) layer, radio link control (RLC) layer, media access control (MAC) layer and physical (PHY) layer.

[0083] Among them, the SDAP layer is used to map the data transmitted on the service quality flow (QoS flow, quality of service, QoS) to the sidelink radio bearer (SLRB) for transmission. The PDCP layer is used to perform user plane security protection. For example, encryption protection and / or integrity protection. The RLC layer is responsible for error repair and flow control. The MAC layer is responsible for controlling the physical medium connected to the physical layer. For example, when sending a data packet, the MAC layer can determine in advance whether the data packet can be sent. If the data packet can be sent, some control information is added to the data packet, and finally the data packet and the control information are sent to the PHY layer in a specified format. The PHY layer is used to provide services for bits or bit groups transmitted between terminals.

[0084] Taking data transmission between terminals as an example, terminal A is used as the TX terminal and terminal B is used as the RX terminal. After terminal A obtains data from the upper layer, it transmits the data to the SDAP layer, PDCP layer, RLC and MAC layer. The MAC layer generates a transmission block (TB), which is then wirelessly transmitted through PHY and sent to terminal B. At the transmitting end, the data is encapsulated in each layer accordingly. For example, the data received by a layer from the upper layer of the layer is regarded as the service data unit (SDU) of the layer, which becomes a protocol data unit (PDU) after being encapsulated by the layer and then passed to the next layer. When terminal B receives the data, it is decapsulated in the PHY layer, MAC layer, RLC layer, PDCP layer and SDAP layer in turn, and then transmitted to the upper layer.

[0085] Optionally, the terminal may also have an application layer, which may be located above the upper layer. The application layer may be used to provide services to applications installed in the terminal. For example, data received by the terminal may be sequentially transmitted from the physical layer to the application layer, and then provided to the application by the application layer; for another example, the application layer may obtain data generated by the application, and sequentially transmit the data to the physical layer and send it to other terminals.

[0086] In one design, Figure 3 As shown, the SLRB includes a PDCP entity, which is located at the PDCP layer. Furthermore, the SLRB may also include: an RLC entity, which is located at the RLC layer. There is a logical channel (logical channel, LCH) between the MAC layer and the RLC layer. Furthermore, the SLRB also includes LCH. In one implementation, the MAC layer combines the data in at least one SLRB / SL LCH into a transport block TB, which is wirelessly transmitted through the PHY layer.

[0087] In the 3GPP version (release 18, R18), the terminal supports SL carrier aggregation (CA), and the terminal can perform SL communication based on multiple carriers. In the 3GPP release 16 (release, R16) and release 17 (release 17, R17), the terminal does not support SL CA, and the terminal can only perform SL communication based on one carrier. Figure 2In the user plane protocol stack structure shown, the upper layer can configure the backward compatibility of each service. The backward compatibility of different services may be different. For example, the transmission of some services requires backward compatibility. At this time, the data transmitted by the service needs to be received by the R16 / R17 terminal. The transmission of some services does not require backward compatibility. At this time, the data transmitted by the service does not need to be received by the R16 / R17 terminal. Further, the upper layer can configure at least one service quality flow for each service, and the backward compatibility of each service quality flow is the same as the backward compatibility of its associated service. Since the backward compatibility of different services may be different, the backward compatibility of different service quality flows may also be different.

[0088] In one design, the access network device may configure the SLRB for the terminal. For example, the access network device may send the configuration information of the SLRB to the terminal, and the terminal establishes the SLRB according to the configuration information of the SLRB. In one implementation, the configuration information of an SLRB includes an indication of mapping at least one service quality flow to the SLRB, and the SDAP layer maps the service quality flow to the corresponding SLRB according to the configuration of each SLRB. In the current scheme, when the access network device configures the SLRB for the terminal, the backward compatibility information of the service quality flow is not considered. For example, multiple service quality flow configurations with different backward compatibilities may be mapped to one SLRB, etc., which affects the SL communication quality.

[0089] In view of this, in an embodiment of the present application, the terminal reports the backward compatibility information of the service quality flow to the access network device, and the access network device determines the configuration of the SLRB according to the backward compatibility information of the service quality flow reported by the terminal, and sends the configuration of the SLRB to the terminal. When configuring the SLRB for the terminal, the backward compatibility information of different service quality flows is considered. For example, multiple service quality flow configurations with the same backward compatibility can be mapped to one SLRB to improve the SL communication quality.

[0090] [Example 1]

[0091] like Figure 4 As shown, the embodiment of the present application provides a flow chart, including:

[0092] Step 410: The terminal sends first indication information, and the access network device receives the first indication information.

[0093] The first indication information is used to indicate the backward compatibility information of the first quality of service flow. For example, the backward compatibility information includes: backward compatibility is required or backward compatibility is not required. The backward compatibility information of the first quality of service flow includes: the first quality of service flow requires backward compatibility, or the first quality of service flow does not require backward compatibility. At this time, the first indication information is used to indicate that the first quality of service flow requires backward compatibility or does not require backward compatibility.

[0094] In one design, the terminal determines the first indication information according to a transmission file (Tx profile, or TXprofile) of the first quality of service flow. Optionally, the access layer of the terminal may obtain the transmission file of the first quality of service flow from an upper layer. In one implementation:

[0095] The transmission file of the first quality of service flow may indicate backward compatibility information of the first quality of service flow. For example, the transmission file of the first quality of service flow indicates that backward compatibility is required, and the first indication information is used to indicate that the first quality of service flow requires backward compatibility; or, the transmission file of the first quality of service flow indicates that backward compatibility is not required, and the first indication information is used to indicate that the first quality of service flow does not require backward compatibility, etc. Or,

[0096] The transmission file of the first quality of service flow may indicate that the first quality of service flow supports SL CA, or does not support SL CA, etc. For example, the transmission file of the first quality of service flow indicates that the first quality of service flow supports SL CA. Since traditional terminals such as R16 and R17 do not support SL CA, the terminal in the embodiment of the present application may be an R18 terminal, and it is believed that the first quality of service flow does not need backward compatibility. At this time, the first indication information may indicate that the first quality of service flow does not need backward compatibility. Alternatively, the transmission file of the first quality of service flow indicates that the first quality of service flow does not support SL CA, and it is believed that the first quality of service flow needs backward compatibility. At this time, the first indication information may indicate that the first quality of service flow needs backward compatibility.

[0097] In an embodiment of the present application, the first quality of service stream includes one or more quality of service streams. Take the first quality of service stream including a quality of service stream as an example. A quality of service stream may correspond to one or more transmission files. In one design, a quality of service stream corresponds to a transmission file, and a transmission file corresponding to the quality of service stream indicates that backward compatibility is required, and the first indication information is used to indicate that the first quality of service stream requires backward compatibility. Alternatively, a transmission file corresponding to the quality of service stream indicates that backward compatibility is not required, and the first indication information is used to indicate that the first quality of service stream does not require backward compatibility. Alternatively, a quality of service stream corresponds to multiple transmission files, and multiple transmission files corresponding to a quality of service stream all indicate that backward compatibility is required, then the first indication information is used to indicate that the first quality of service stream requires backward compatibility. Alternatively, one transmission file in multiple transmission files corresponding to a quality of service stream indicates that backward compatibility is not required, then the first indication information is used to indicate that the first quality of service stream does not require backward compatibility. Alternatively, a quality of service stream does not have its corresponding transmission file. For example, if the transmission file corresponding to the quality of service stream cannot be obtained from the upper layer, it is determined that the quality of service stream does not require backward compatibility. In the case where the first quality of service flow includes multiple quality of service flows, the backward compatibility of each quality of service flow can be determined separately according to the above scheme, and the backward compatibility of each quality of service flow can be reported to the access network device. That is, in the embodiment of the present application, the backward compatibility information is reported at a granularity of each quality of service flow, and the corresponding backward compatibility information is reported for each quality of service flow.

[0098] Optionally, the transmission file of the first QoS flow is associated with the identifier of the first QoS flow and / or the QoS profile of the first QoS flow. In one implementation, the access layer of the terminal may determine the transmission file corresponding to the first QoS flow based on the identifier of the first QoS flow and / or the QoS profile of the first QoS flow. Here, the identifier of the first QoS flow may be a PC5 QoS flow identifier (PFI) of the first QoS flow, and the QoS profile is a set of QoS parameters.

[0099] In one design, in step 410, in addition to reporting the first indication information to the access network device, the terminal may also report the identifier of the first quality of service flow and / or the quality of service flow file to the access network device. Here, the identifier of the first quality of service flow may be an identifier (identifier, ID) of the first quality of service flow, which may be different from the PFI mentioned above.

[0100] Step 420: The access network device determines configuration information of the first SLRB according to the backward compatibility information of the first quality of service flow.

[0101] In one design, it can be described as: the configuration information of the first SLRB is determined according to the backward compatibility information of the first service quality flow. The configuration information of the first SLRB includes: the mapping relationship between the service quality flow and the first SLRB, and other SLRB configuration information. Taking the first SLRB including one SLRB as an example, the access network device can map the service quality flow with the same backward compatibility information to one SLRB. For example, the terminal reports the backward compatibility information of 4 service quality flows to the access network device, which are: service quality flow 1 requires backward compatibility, service quality flow 2 requires backward compatibility, service quality flow 3 does not require backward compatibility, and service quality flow 4 does not require backward compatibility. Then the access network device can configure service quality flow 1 and service quality flow 2 to be mapped to one SLRB, and configure service quality flow 3 and service quality flow 4 to be mapped to another SLRB. In one description: the configuration information of the first SLRB is associated with the first service quality flow, which can be understood as: configuring the first service quality flow to be mapped to the first SLRB. In one implementation, the first service quality flow includes multiple service quality flows, and the backward compatibility of the multiple service quality flows is the same.

[0102] Step 430: The access network device sends the configuration information of the first SLRB, and the terminal receives the configuration information of the first SLRB.

[0103] In one design, the terminal establishes an SLRB with the service quality flow as an anchor point. For example, a service quality flow is configured to be mapped to an SLRB. The terminal can determine whether the SLRB is established; if the SLRB is established, the establishment of the SLRB will not be retriggered. Alternatively, if the SLRB is not established, the establishment of the SLRB is triggered. For example, the terminal establishes the SLRB according to the configuration information of the SLRB.

[0104] Optionally, the terminal may determine the backward compatibility information of the first SLRB. For example, the backward compatibility information of the first SLRB includes: the first SLRB needs to be backward compatible, or the first SLRB does not need to be backward compatible.

[0105] In one implementation, the configuration information of the first SLRB includes second indication information, and the second indication information is used to indicate the backward compatibility information of the first SLRB; the terminal can determine the backward compatibility information of the first SLRB according to the indication of the second indication information. For example, if the second indication information is used to indicate that the first SLRB needs backward compatibility, it is determined that the first SLRB needs backward compatibility. Alternatively, if the second indication information is used to indicate that the first SLRB does not need backward compatibility, it is determined that the first SLRB does not need backward compatibility. In one implementation, the configuration information of the first SLRB includes the configuration information of the logical channel LCH, and the configuration information of the LCH includes the second indication information, or it can be described as: the second indication information is used to indicate the backward compatibility information of the LCH, and the backward compatibility information of the first SLRB is the same as the backward compatibility information of the LCH. Alternatively,

[0106] In another implementation, the terminal may determine the backward compatibility information of the first SLRB based on the backward compatibility information of the first service quality flow. For example, the configuration information of the first SLRB includes: the configuration of the mapping relationship between the service quality flow and the first SLRB. In the description of the present application, the configuration of the first service quality flow mapping to the first SLRB is used as an example. Optionally, the backward compatibility of the service quality flow configured to have a mapping relationship with the first SLRB is the same, that is, the first service quality flow includes multiple service quality flows, the backward compatibility of the multiple service quality flows is consistent, and the backward compatibility of the first SLRB is the same as the backward compatibility of the first service quality flow. For example, the first service quality flow is one or more service quality flows, the backward compatibility information of the one or more service quality flows is that backward compatibility is required, and the backward compatibility information of the first SLRB is that backward compatibility is required; or, the backward compatibility information of the one or more service quality flows is that backward compatibility is not required, and the backward compatibility information of the first SLRB is that backward compatibility is not required. Or it can be described as: the backward compatibility information of the first SLRB is determined according to the backward compatibility information of the service quality flow carried, associated or mapped on the first SLRB. For example, the first SLRB is associated with multiple service quality flows: the backward compatibility of the multiple service quality flows is the same, and the backward compatibility of the first SLRB is the same as the backward compatibility of the multiple service quality flows; or, the backward compatibility of the multiple service quality flows is inconsistent, and the backward compatibility of the first SLRB is that backward compatibility is required.

[0107] It can be understood that the SLRB in the embodiment of the present application may refer to: sidelink data radio bearer (SL dataradio bearer, SL DRB) and / or sidelink signaling radio bearer (SL signalling radio bearer, SLSRB), etc. SL DRB is used for SL data transmission on the user plane, and SL SRB is used for SL signaling transmission on the control plane. In the embodiment of the present application, SL DRB is mainly used as an example for description.

[0108] Through the above design, the terminal uses the service quality flow as the granularity to determine whether each service quality flow needs backward compatibility, and reports to the access network device whether each service quality flow needs backward compatibility, so that the access network device can consider the backward compatibility of different service quality flows when configuring the mapping relationship between the service quality flow and the SLRB. For example, the access network device can map the service quality flow configuration with the same backward compatibility to one SLRB, and avoid mapping the service quality flow configuration with different backward compatibility to one SLRB, so as to ensure that the SL data meets the backward compatibility requirements indicated by the upper layer when transmitting in the AS, and improve the quality of SL communication.

[0109] [Example 2]

[0110] In one design, the terminal may establish a first SLRB according to the configuration information of the first SLRB; the terminal may establish a second SLRB according to the backward compatibility information of the first quality of service flow and the backward compatibility information of the first SLRB. For example, if the backward compatibility information of the first quality of service flow is different from the backward compatibility information of the first SLRB, a second SLRB is established. Alternatively, if the backward compatibility information of the first quality of service flow is the same as the backward compatibility information of the first SLRB, a second SLRB is not established.

[0111] In one implementation, the terminal may obtain the configuration information of the first SLRB by the method in [Implementation Example 1]. For example, the terminal is in a radio resource control (RRC) connection state, the terminal reports the backward compatibility information of each service quality flow to the access network device, and the terminal receives the configuration information of the first SLRB from the access network device. Or,

[0112] In another implementation, the configuration information of the first SLRB may be pre-configured, and the terminal may obtain the configuration information of the first SLRB through pre-configuration. Alternatively, the terminal may obtain the configuration information of the first SLRB through a system information block (SIB) or RRC dedicated signaling. At this time, the terminal may be in a non-RRC connected state, and the non-RRC connected state includes: RRC idle state, RRC inactive state, or out of coverage (OOC) state. Alternatively, the terminal is in an RRC connected state, and the terminal may obtain the configuration information of the first SLRB through this implementation.

[0113] like Figure 5 As shown, the embodiment of the present application provides a process, including:

[0114] Step 510: The terminal obtains configuration information of the first SLRB.

[0115] Regarding the implementation scheme of the terminal obtaining the configuration information of the first SLRB, please refer to the previous description.

[0116] Step 520: The terminal establishes the first SLRB according to the configuration information of the first SLRB.

[0117] In one implementation, the configuration information of the first SLRB is used to indicate that the first quality of service flow is mapped to the first SLRB. In other words, the first SLRB is associated with the first quality of service flow.

[0118] In another implementation, the configuration information of the first SLRB is used to indicate that the second quality of service flow is mapped to the first SLRB. In other words, the first SLRB is associated with the second quality of service flow. At this time, the first SLRB is established with the second quality of service flow as an anchor point.

[0119] Step 530: The terminal determines whether to establish or not to establish the second SLRB according to the backward compatibility information of the first service quality flow and the backward compatibility information of the first SLRB.

[0120] In one design, the process of the terminal determining the backward compatibility information of the first quality of service flow and the first SLRB can be referred to the description in Example 1. The first quality of service flow includes one or more quality of service flows. Take the first quality of service flow as a quality of service flow as an example: configure to establish a quality of service flow, and according to the configuration in the first SLRB, the quality of service flow needs to be mapped to the first SLRB. In the embodiment of the present application, the quality of service flow is not directly mapped to the first SLRB, but whether the backward compatibility of the quality of service flow and the first SLRB is consistent is considered; if consistent, the quality of service flow is mapped to the first SLRB. Alternatively, if the two are inconsistent, a new SLRB is established, and the new SLRB is called the second SLRB, and the quality of service flow is mapped to the second SLRB, and the backward compatibility of the second SLRB is the same as the backward compatibility of the quality of service flow. It can be understood that the second SLRB can also be established according to the configuration information of the first SLRB. Further, optionally, the identifier of the LCH corresponding to the second SLRB and the first SLRB is different.

[0121] Through the above design, the backward compatibility of the service quality flow is different from the backward compatibility of the configured and established SLRB, which triggers the establishment of a new SLRB. The backward compatibility of the newly established SLRB is the same as the backward compatibility of the service quality flow, thereby ensuring that the backward compatibility of the service quality flow is the same as the SLRB to which it is mapped, ensuring that the SL data transmission in the AS can meet the backward compatibility requirements indicated by the upper layer, thereby improving the SL communication quality.

[0122] [Example 3]

[0123] like Figure 6 As shown, the embodiment of the present application provides a process, including:

[0124] Step 610: The terminal determines the backward compatibility information of the highest priority LCH of the first destination.

[0125] In one design, the terminal selects a first destination; the terminal determines the highest priority LCH of the first destination; the terminal determines the backward compatibility information of the highest priority LCH. It is understandable that the terminal, as a TX terminal, may perform SL communication with multiple RX terminals. Each time the terminal performs a new SL transmission, the terminal selects an RX terminal from at least one RX terminal. The selected RX terminal can be considered as the first destination. The terminal can use at least one SLRB to perform SL communication with the first destination. Each SLRB includes at least one LCH associated or corresponding. It is understandable that in the description of the present application, the descriptions of "include", "associated" or "corresponding" are not distinguished and can be replaced with each other. For example, "include" can be replaced with "corresponding" or "associated", and "corresponding" can also be replaced with "associated", etc. For example, each SLRB includes an LCH, or, in a duplication scenario, each SLRB includes multiple LCHs. The terminal can select the highest priority LCH from the LCHs corresponding to at least one SLRB.

[0126] In one implementation, the configuration information of the SLRB includes the configuration of the LCH, and the configuration of the LCH includes backward compatibility information, etc. The terminal may determine the backward compatibility information of the highest priority LCH according to the backward compatibility information included in the configuration information of the highest priority LCH; or,

[0127] In another implementation, the terminal determines the backward compatibility information of the highest priority LCH based on the backward compatibility information of the service quality flow associated with the highest priority LCH. Regarding the service quality flow associated with the LCH, the following explanation is made: there is an association relationship between the SLRB and the service quality flow, for example, there is an association relationship between the service quality flow and the SLRB mapped thereto. There is an association relationship between the SLRB and at least one service quality flow, and the LCH included in the SLRB also has an association relationship with the at least one service quality flow. For example, there is one service quality flow associated with the highest priority LCH, and the backward compatibility information of the highest priority LCH is the same as the backward compatibility information of the one service quality flow. Alternatively, there are multiple service quality flows associated with the highest priority LCH, and if the backward compatibility information of the multiple service quality flows is the same, then the backward compatibility information of the highest priority LCH is the same as the backward compatibility information of the multiple service quality flows. Alternatively, if the backward compatibility information of the multiple service quality flows is different, then the backward compatibility information of the highest priority LCH is that backward compatibility is required.

[0128] It is understandable that in the embodiment of the present application, the terminal may first select the first destination, then select the LCH with the highest priority of the first destination; and then determine the backward compatibility information of the LCH with the highest priority of the first destination. Alternatively, the terminal may select the LCH with the highest priority; then determine the destination corresponding to the LCH with the highest priority, which is the first destination; and then determine the backward compatibility information of the LCH with the highest priority of the first destination, etc. It is understandable that the backward compatibility information of the LCH with the highest priority of the first destination, etc., may also be determined in other ways, without limitation.

[0129] Step 620: The terminal selects or does not select the first LCH according to the backward compatibility information of the highest priority LCH of the first destination and the backward compatibility information of the first LCH. Optionally, the first LCH is the LCH of the first destination.

[0130] In the embodiment of the present application, the process of the terminal determining the backward compatibility information of the first LCH is similar to the process of determining the backward compatibility information of the highest priority LCH of the first destination. For example, the terminal may determine the backward compatibility information of the first LCH according to the configuration of the first LCH, or the terminal may determine the backward compatibility information of the first LCH according to the backward compatibility information of the service quality flow associated with the first LCH, etc.

[0131] In one design, if the backward compatibility information of the highest priority LCH of the first destination is the same as the backward compatibility information of the first LCH, the first LCH is selected. For example, if the backward compatibility information of the highest priority LCH of the first destination is the same as the backward compatibility information of the first LCH, both require backward compatibility, or both do not require backward compatibility, the first LCH is selected. Or,

[0132] The backward compatibility information of the highest priority LCH of the first destination is different from the backward compatibility information of the first LCH, and the first LCH is not selected. For example, the highest priority LCH of the first destination requires backward compatibility, and the first LCH does not need backward compatibility, or the highest priority LCH of the first destination does not require backward compatibility, and the first LCH requires backward compatibility; the backward compatibility information of the two is different, and the first LCH is not selected.

[0133] Optionally, after step 620, the method further includes: the terminal generates a first TB according to the highest priority LCH of the first destination and the first LCH. In one understanding, the data in the highest priority LCH of the first destination is considered to be the data to be sent by the terminal. Before sending the data, the terminal can select an LCH that is consistent with the backward compatibility of the LCH of the current data to be sent (i.e., the highest priority LCH of the first destination) from other LCHs of data to be sent, and assemble them into a TB, which is called the first TB.

[0134] Optionally, the backward compatibility information of at least one LCH in the LCH corresponding to the first TB indicates that backward compatibility is not required, and the first TB can perform cross-carrier scheduling and / or SL cross-carrier feedback. Alternatively, the backward compatibility information of all LCHs in the LCH corresponding to the first TB indicates that backward compatibility is required, and the first TB cannot perform cross-carrier scheduling and / or SL cross-carrier feedback.

[0135] In one implementation, following the above design, the backward compatibility information of the LCH corresponding to the first TB is the same. For example, the LCH corresponding to the first TB includes the highest priority LCH of the first destination and the first LCH. Therefore, the backward compatibility information of the LCH corresponding to the first TB is that backward compatibility is required, and the first TB cannot perform cross-carrier scheduling and / or SL cross-carrier feedback. Alternatively, the backward compatibility information of the LCH corresponding to the first TB is that backward compatibility is not required, and the first TB can perform cross-carrier scheduling and / or SL cross-carrier feedback, etc.

[0136] Among them, cross-carrier scheduling refers to the side link control information (SCI) and SL data that schedule SL data, and the two use different carriers. For example, the TX terminal sends SCI and TB to the RX terminal, and SCI is used to schedule the SL transmission of TB. The transmission carriers of SCI and TB are different. For example, SCI is transmitted on carrier 1, and TB is transmitted on carrier 2. SL cross-carrier feedback means that the transmission carriers of SL data and hybrid automatic repeat request (HARQ) feedback of SL data are different. For example, the TX terminal sends a TB to the RX terminal, and the TB carries SL data. When the RX terminal receives the TB, it sends HARQ feedback to the TX terminal. The HARQ feedback includes positive acknowledgment (ACK) and negative acknowledgment (NACK). The transmission carriers of TB and HARQ feedback are different. For example, TB is transmitted on carrier 3, and HARQ feedback is transmitted on carrier 4.

[0137] In one design, [Example Three] may be a subsequent implementation of [Example One], [Example Two] or [Example Five]: for example, the first SLRB or the second SLRB established in [Example One], [Example Two] or [Example Five] includes a first LCH; then the scheme of [Example Three] may be adopted to determine whether to select or not select the first LCH. Select the first LCH, generate a first TB based on the highest priority LCH of the first destination and the first LCH, and send data corresponding to the first TB to the receiving terminal. Alternatively, this [Example Three] may be used for the SL logical channel priority (logical channel prioritization, LCP) process, etc., without limitation. It is understandable that in the embodiments of the present application, two terminals may perform unicast, multicast or broadcast on the SL link. Unicast communication is performed between the two terminals, and the sending terminal may synchronize all or part of the SLRB configuration configured for it by the access network device to the receiving terminal.

[0138] Through the above design, when selecting a certain LCH according to the LCH with the highest priority, the backward compatibility information of the LCH is considered. For example, if the backward compatibility information of the LCH is the same as that of the LCH with the highest priority, then the LCH is selected. This can ensure that the backward compatibility information of the LCH multiplexed on the same TB for transmission is consistent. The SL data transmitted at the AS layer can ensure the backward compatibility requirements of the LCH layer and improve the SL communication quality.

[0139] [Example 4]

[0140] In the fourth embodiment, the terminal can report the carrier information corresponding to each quality of service flow based on the quality of service flow granularity in the RRC connected state. The access network device can configure the SLRB according to the carrier information corresponding to each quality of service flow. For example, the quality of service flows with the same carrier information are mapped to the same SLRB as much as possible.

[0141] like Figure 7 As shown, the embodiment of the present application provides a process, including:

[0142] Step 710: The terminal determines a first carrier according to a transmission file of a first quality of service flow.

[0143] In one implementation, the terminal may obtain the transmission file of the first quality of service flow and the second carrier corresponding to / supported by the first quality of service flow from the upper layer. It can be understood that the transmission file of the first quality of service flow and the second carrier corresponding to the first quality of service flow are associated with the identifier of the first quality of service flow and / or the quality of service flow file (QoS profile) of the first quality of service flow. For example, the terminal may determine the transmission file of the first quality of service flow and the second carrier corresponding to / supported by the first quality of service flow according to the identifier of the first quality of service flow and / or the QoS profile of the first quality of service flow. In step 710, the identifier of the first quality of service flow may be a PFI.

[0144] The first service quality flow may correspond to one or more transmission files: the first service quality flow corresponds to a transmission file, and the transmission file indicates that backward compatibility is not required, and determines that the first carrier is the same as the second carrier, that is, the first carrier is the second carrier corresponding to / supported by the first service quality flow. Alternatively, the transmission file indicates that backward compatibility is required, and the first carrier is a preset carrier. The preset carrier may be: a legacy carrier, a default carrier, a carrier supported by an R16 / R17 SL terminal, or a carrier in a carrier list included in SIB12, etc. Alternatively, the first service quality flow corresponds to multiple transmission files, and one of the multiple transmission files indicates that backward compatibility is required, and the first carrier is a preset carrier; or multiple transmission files all indicate that backward compatibility is not required, and the first carrier is the same as the second carrier. Alternatively, there may be a situation where there is no corresponding transmission file for the first service quality flow, in which case the second carrier is a preset carrier.

[0145] Step 720: The terminal sends third indication information, and the access network device receives the third indication information.

[0146] Among them, the third indication information is used to indicate the first carrier. Optionally, in addition to sending the third indication information to the access network device, the terminal may also send information about the first quality of service flow to the access network device. For example, the information about the first quality of service flow includes an identifier of the first quality of service flow and / or a QoS profile of the first quality of service flow, etc. In step 720, the identifier of the first quality of service flow may be an ID of the first quality of service flow. In one implementation, the terminal may send the third indication information and / or information about the first quality of service flow, etc. to the access network device via a sidelink user equipment information (SUI) message.

[0147] Step 730: The access network device determines configuration information of the first SLRB according to the first carrier.

[0148] In the embodiment of the present application, the configuration information of the first SLRB is determined according to the first carrier. The configuration information of the first SLRB is associated with the first quality of service flow, for example, the first quality of service flow can be configured to be mapped to the first SLRB.

[0149] In one design, the access network device determines the carrier information of the first SLRB based on the first carrier corresponding to the first service quality flow. The access network device determines the configuration information of the first SLRB based on the carrier information of the first SLRB. For example, the configuration information of the first SLRB includes the carrier information of the first SLRB. For example, the terminal reports the carrier corresponding to each service quality flow to the access network device based on the service quality flow granularity. The carrier information of the first SLRB can be the intersection or union of the carriers corresponding to the service quality flows that have a mapping relationship or association relationship with it.

[0150] Step 740: The access network device sends the configuration information of the first SLRB, and the terminal receives the configuration information of the first SLRB.

[0151] In one design, the configuration information of the first SLRB includes carrier information of the first SLRB. During processing, the MAC layer of the terminal: multiplexes at least one SLRB on a TB and transmits it on a certain carrier. It can be understood that each SLRB in at least one SLRB multiplexed to a TB supports transmission on the carrier.

[0152] In one design, the terminal can use the quality of service as an anchor point and establish a first SLRB according to the configuration information of the first SLRB. For details, please refer to the description in [Implementation Example 1]. Alternatively, when the terminal receives the configuration of a quality of service flow, it can determine whether to establish a second SLRB according to the scheme in [Implementation Example 2]. Of course, the second SLRB can be established based on the configuration information of the first SLRB.

[0153] Through the above design, the terminal reports the carrier information corresponding to each service quality flow to the access network device at the granularity of service quality flow. The access network device considers the carrier information corresponding to each service quality flow to configure the carrier information of SLRB for the terminal. For example, it avoids supporting the service quality flow with which the carrier configured for SLRB is associated or mapped, thereby ensuring the backward compatibility requirements of the service quality flow in the transmission at the AS layer, thereby improving the SL communication quality.

[0154] [Example 5]

[0155] Embodiment 5 mainly describes: in a non-RRC connected state, a process in which a terminal determines the carrier information of a first SLRB. Of course, the solution of Embodiment 5 can also be applied to an RRC connected state without limitation.

[0156] like Figure 8As shown, the embodiment of the present application provides a process, including:

[0157] Step 810: The terminal obtains configuration information of the first SLRB, where the configuration information of the first SLRB is associated with the first quality of service flow.

[0158] The process of the terminal obtaining the configuration information of the first SLRB is not limited. For example, the terminal is in the RRC connected state, and adopts the scheme in [Implementation Example 1] to obtain the configuration information of the first SLRB. Alternatively, the terminal is in the non-RRC connected state or RRC connected state, and adopts the pre-configuration, SIB or RRC dedicated signaling scheme in [Implementation Example 2] to obtain the configuration information of the first SLRB, etc., without limitation.

[0159] Step 820: The terminal establishes the first SLRB according to the configuration information of the first SLRB.

[0160] For example, the first service quality flow is configured to be mapped to the first SLRB, the first service quality flow is configured to be established, and the first SLRB is not established. The terminal can establish the first SLRB according to the configuration information of the first SLRB.

[0161] Step 830: The terminal determines the carrier information of the first SLRB according to the backward compatibility information of the first service quality flow.

[0162] In one design, the terminal obtains the transmission file of the first service quality stream from the upper layer, and determines the backward compatibility information of the first service quality stream according to the transmission file of the first service quality stream. For details, please refer to the description in [Implementation Example 1]. Optionally, the terminal can also determine the backward compatibility information of the first SLRB. For the process of the terminal determining the backward compatibility information of the first SLRB, please refer to the description in [Implementation Example 1].

[0163] In one design, the first service quality flow is configured to be mapped to the first SLRB, and the first service quality flow includes one or more service quality flows. The first service quality flow includes a service quality flow, and the backward compatibility information of the service quality flow is that backward compatibility is required, then the carrier information of the first SLRB is a preset carrier. Alternatively, the backward compatibility information of the service quality flow is that backward compatibility is not required, and the carrier information of the first SLRB is the carrier information corresponding to or supported by the service quality flow. The terminal can obtain the carrier information corresponding to or supported by a service quality flow from the upper layer. Alternatively,

[0164] The first service quality flow includes multiple service quality flows, and the backward compatibility information of the multiple service quality flows is that backward compatibility is not required, and the carrier information of the first SLRB is the carrier supported by the multiple service quality flows. The carrier supported by the multiple service quality flows may be the intersection of the carriers supported by the multiple service quality flows, or the union of the carriers supported by the multiple service quality flows, etc. Alternatively, the backward compatibility information of a service quality flow in the multiple service quality flows is that backward compatibility is required, and the carrier information of the first SLRB is a preset carrier. For the preset carrier, please refer to the previous description.

[0165] Through the above design, the carrier information of the first SLRB is determined according to the backward compatibility information of the first service quality flow associated with the first SLRB, which can ensure the transmission of the service quality flow carried or associated on the first SLRB, meet the backward compatibility requirements indicated by the upper layer, and improve the SL communication quality.

[0166] It is understandable that in the embodiments of the present application:

[0167] 1. The description of "backward compatibility information required" can be replaced by: SL CA is not supported. The description of not requiring backward compatibility can be replaced by: SL CA is supported. For example, the description that the first quality of service flow requires backward compatibility can be replaced by: the first quality of service flow does not support SL CA. The description that the first quality of service flow does not require backward compatibility can also be replaced by: the first quality of service flow supports SL CA.

[0168] 2. The description of "backward compatibility information" can be replaced by: transmission file. For example, the backward compatibility information of the first quality of service flow can be replaced by: transmission file of the first quality of service flow.

[0169] 3. The description of "association" can be replaced by: corresponding, mapping, etc. For example, the configuration information of the first SLRB is associated with the first service quality flow, which can be replaced by: the configuration information of the first SLRB corresponds to the first service quality flow, or the first service quality flow is mapped to the SLRB corresponding to the first SLRB configuration information, etc.

[0170] 4. Different embodiments can be implemented separately or in combination, etc., without limitation. The differences between different processes are described emphatically, and the descriptions of different processes can refer to each other.

[0171] 5. In Figures 4 to 8 In the process, the order of different steps is not limited. And in each process, it may include fewer steps or more steps than the flow chart or text description.

[0172] 6. In the figure to Figure 8In the process, the terminal and / or access network device are described as the execution subject. It can be understood that in each process, the function of the terminal can be implemented by the terminal, or by a module in the terminal (such as a chip or circuit, etc.). The function of the access network device can be implemented by the access network device, or by a module in the access network device (such as a chip or circuit, etc.), or by a logical node, logical module or software that can fully or partially implement the function of the access network device.

[0173] 7. In the embodiments of the present application, "(such as a terminal) receives information from (such as an access network device)" can be understood as the source of the information is the access network device, and the destination is the terminal, which may include the terminal directly or indirectly receiving information from the access network device. The information may be processed as necessary between the source and destination of the information, such as format changes, but the destination can understand the valid information from the source. Similar expressions in this application can be understood similarly and will not be repeated here.

[0174] In the embodiments provided by the present application, the methods provided by the embodiments of the present application are introduced from the perspective of access network equipment and / or terminal interaction. In order to implement the functions in the methods provided by the embodiments of the present application, the access network equipment or terminal, etc., may include a hardware structure and / or a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether a certain function of the above functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the design constraints of the specific application of the technical solution.

[0175] Fig. 9 and Fig.10 A schematic diagram of the structure of possible devices provided in the embodiments of the present application. These communication devices can implement one or more corresponding functions in the above method embodiments. For example, the functions implemented by the terminal or access network equipment, etc., may thus achieve the beneficial effects possessed by the above method embodiments.

[0176] like Fig. 9 As shown, the communication device 900 includes a processing unit 910 and a transceiver unit 920 .

[0177] Exemplarily, the processing unit 910 may also be referred to as a processor, a processing board, a processing module, a processing device, etc. The transceiver unit 920 may also be referred to as a transceiver, a transceiver, a transceiver module, a transceiver device, a communication unit, etc. Further, the transceiver unit 920 may include at least one of a transmitting unit or a receiving unit. The transmitting unit and the receiving unit may be integrated together, or may be two independent units, etc.

[0178] In one design, communication apparatus 900 is used to implement Figure 4The functions of the middle terminal are as follows:

[0179] The processing unit 910 is used to generate first indication information; the transceiver unit 920 is used to send the first indication information, wherein the first indication information is used to indicate the backward compatibility information of the first service quality flow; the transceiver unit 920 is also used to receive configuration information of the first side link radio bearer SLRB, the configuration information of the first SLRB is associated with the first service quality flow, and the configuration information of the first SLRB is determined according to the backward compatibility information of the first service quality flow. In another design, the communication device 900 is used to implement Figure 4 The functions of the access network equipment are as follows:

[0180] The transceiver unit 920 is used to receive first indication information, where the first indication information is used to indicate backward compatibility information of a first quality of service flow; the processing unit 910 is used to determine configuration information of a first sidelink radio bearer SLRB based on the backward compatibility information of the first quality of service flow, where the configuration information of the first SLRB is associated with the first quality of service flow; the transceiver unit 920 is also used to send the configuration information of the first SLRB.

[0181] For more detailed description of the processing unit 910 and the transceiver unit 920, please refer to the above method embodiment. Figure 4 The description is not repeated here.

[0182] It is understandable that the division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in the embodiments of the present application may be integrated into a physical device (for example, a processor), or each functional unit may be a separate physical device, or two or more units may be integrated into one unit for implementation, and the above-mentioned integrated unit may be implemented in the form of hardware, or in the form of software functional modules, etc.

[0183] Fig.10 Another structural diagram of the communication device 1000 provided in an embodiment of the present application is shown. For example, Fig.10 The communication device 1000 shown may be Fig. 9 A hardware circuit implementation of the communication device 900 shown in FIG. Fig.10 Only the essential parts of the communication device are shown.

[0184] like Fig.10 As shown, the communication device 1000 includes a processor 1010 and an interface circuit 1020. The processor 1010 and the interface circuit 1020 are coupled to each other.

[0185] For example, the processor 1010 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor. The interface circuit 1020 may be a transceiver or an input-output circuit, etc.

[0186] Optionally, the communication device 1000 may further include a memory 1030 for storing instructions executed by the processor 1010 or storing input data required by the processor 1010 to execute instructions or storing data generated after the processor 1010 executes instructions. For example, instructions may also be referred to as computer programs, or computer program codes, etc.

[0187] For example, the memory 1030 may be a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a register, a hard disk, a mobile hard disk, a CD-ROM, or any other form of storage medium known in the art.

[0188] When the communication device 1000 is used to implement Figure 4 When the method is used for a terminal or access network device in the middle, the processor 1010 is used to implement the function of the processing unit 910, and the interface circuit 1020 is used to implement the function of the transceiver unit 920.

[0189] In one design, the interface circuit 1020 is used to receive signals from other communication devices outside the communication device 1000 and transmit them to the processor 1010, or send signals from the processor 1010 to other communication devices outside the communication device. The processor 1010 implements the above through logic circuits or executes code instructions. Figure 4 The function of the terminal or access network equipment.

[0190] The embodiment of the present application also provides a communication device, which includes a processor and a memory, the processor and the memory are coupled, and the processor is used to implement Figure 4 For example, the processor may execute instructions in the memory so that the communication device implements one or more functions in the above method embodiments, such as Figure 4 In one exemplary embodiment, the storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in Figure 4 The processor and storage medium may also exist as discrete components. Figure 4 The terminal or access network equipment in the system.

[0191] The present application also provides a computer-readable storage medium, which stores instructions, which may also be referred to as computer programs, computer program codes, etc. The instructions are executed on a computer, so that the computer executes the method in the above embodiment. Figure 4 The function of the terminal or access network equipment.

[0192] Optionally, the computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device or other programmable device. The computer program or instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instruction may be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disc; it may also be a semiconductor medium, such as a solid-state hard disk. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both volatile and non-volatile types of storage media.

[0193] The present application also provides a computer program product, including a computer program or an instruction. When the computer program or the instruction is executed on a computer, the above Figure 4 The method of the terminal or access network device is executed. For example, the computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on the computer, all or part of the embodiments of the present application are executed. Figure 4 The process or function of a terminal or access network device.

[0194] It is understood that the method in the embodiments of the present application can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, it can be implemented in whole or in part in the form of a computer program product.

[0195] The present application also provides a chip, which includes a processor, the processor is coupled to a memory, and the processor is used to execute a computer program or instruction stored in the memory, so that the chip implements Figure 4 For example, taking the chip realizing the function of the access network device as an example, the chip can receive information from other modules in the access network device (such as radio frequency or antenna, etc.), and the information can be sent by the access network device to the terminal. Alternatively, the access network device can send information to other modules in the access network device (such as radio frequency or antenna, etc.), and the information is sent by the access network device to the terminal, etc.

[0196] An embodiment of the present application also provides a communication system, including: a first communication device and a second communication device.

[0197] Among them, the first communication device can implement the above Figure 4 The second communication device can implement the above Figure 4 For the specific structure of the first communication device or the second communication device, please refer to the above description, for example Fig. 9 or Fig.10 The structure description in .

[0198] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: include: Sending first indication information, where the first indication information is used to indicate backward compatibility information of the first quality of service flow; Receive configuration information of a first sidelink radio bearer SLRB, wherein the configuration information of the first SLRB is associated with the first quality of service flow, and the configuration information of the first SLRB is determined based on backward compatibility information of the first quality of service flow.

2. The method according to claim 1, characterized in that The configuration information of the first SLRB includes second indication information, and the second indication information is used to indicate backward compatibility information of the first SLRB.

3. The method according to claim 1, characterized in that Also includes: Determine the backward compatibility information of the first SLRB according to the backward compatibility information of the first quality of service flow.

4. The method according to any one of claims 1 to 3, characterized in that Before sending the first indication information, the method further includes: The first indication information is determined according to a transmission file of the first quality of service flow, where the transmission file of the first quality of service flow is used to indicate backward compatibility information of the first quality of service flow.

5. The method according to claim 4, characterized in that Also includes: The transmission file of the first quality of service flow is obtained from an upper layer.

6. The method according to any one of claims 1 to 5, characterized in that Also includes: Establishing the first SLRB according to the configuration information of the first SLRB; A second SLRB is established according to the backward compatibility information of the first quality of service flow and the backward compatibility information of the first SLRB.

7. The method according to claim 6, characterized in that The establishing the second SLRB according to the backward compatibility information of the first quality of service flow and the backward compatibility information of the first SLRB includes: The backward compatibility information of the first service quality flow is different from the backward compatibility information of the first SLRB, and the second SLRB is established.

8. The method according to any one of claims 1 to 7, characterized in that The first SLRB includes a first logical channel LCH, and further includes: Determining backward compatibility information of the highest priority LCH for the first destination; The first LCH is selected based on the backward compatibility information of the highest priority LCH of the first destination and the backward compatibility information of the first LCH.

9. The method according to claim 8, characterized in that The selecting the first LCH according to the backward compatibility information of the highest priority LCH of the first destination and the backward compatibility information of the first LCH comprises: The backward compatibility information of the highest priority LCH of the first destination is the same as the backward compatibility information of the first LCH, and the first LCH is selected.

10. The method according to claim 8 or 9, characterized in that The backward compatibility information of the highest priority LCH of the first destination and / or the backward compatibility information of the first LCH is determined according to the following method: Determined according to the backward compatibility information included in the configuration information of the LCH; or, The determination is made according to the backward compatibility information of the quality of service flow associated with the LCH.

11. The method according to any one of claims 8 to 10, characterized in that After selecting the first LCH, the method further includes: A first transport block TB is generated according to the highest priority LCH of the first destination and the first LCH.

12. The method according to claim 11, characterized in that Also includes: When the backward compatibility information of at least one LCH in the LCH corresponding to the first TB indicates that backward compatibility is not required, the first TB can perform cross-carrier scheduling and / or SL cross-carrier feedback.

13. The method according to any one of claims 1 to 12, characterized in that The backward compatibility information is used to indicate whether backward compatibility is required or not.

14. A communication method, characterized in that: include: receiving first indication information, where the first indication information is used to indicate backward compatibility information of a first quality of service flow; Determine configuration information of a first sidelink radio bearer SLRB according to backward compatibility information of the first quality of service flow, wherein the configuration information of the first SLRB is associated with the first quality of service flow; Send configuration information of the first SLRB.

15. The method according to claim 14, characterized in that The configuration information of the first SLRB includes second indication information, and the second indication information is used to indicate backward compatibility information of the first SLRB.

16. The method according to claim 14, characterized in that The backward compatibility information of the first SLRB is determined according to the backward compatibility information of the first quality of service flow.

17. The method according to any one of claims 14 to 16, characterized in that The first indication information is determined according to a transmission file of the first quality of service flow, and the transmission file of the first quality of service flow is used to indicate backward compatibility information of the first quality of service flow.

18. The method according to claim 17, characterized in that The transmission file of the first quality of service flow is obtained from an upper layer.

19. The method according to any one of claims 14 to 18, characterized in that The backward compatibility information is used to indicate whether backward compatibility is required or not.

20. A device, characterized in that: Comprising units for implementing the method according to any one of claims 1 to 13.

21. A device, characterized in that: The method comprises a processor and a memory, wherein the processor and the memory are coupled, and the processor is configured to implement the method according to any one of claims 1 to 13.

22. A device, characterized in that: It includes a processor and an interface circuit, wherein the interface circuit is used to receive signals from other devices outside the device and transmit them to the processor or send signals from the processor to other devices outside the device, and the processor is used to implement the method as described in any one of claims 1 to 13 through logic circuits or execution code instructions.

23. A device, characterized in that: Comprising means for implementing the method according to any one of claims 14 to 19.

24. A device, characterized in that: The method comprises a processor and a memory, wherein the processor and the memory are coupled, and the processor is configured to implement the method according to any one of claims 14 to 19.

25. A device, characterized in that: It includes a processor and an interface circuit, wherein the interface circuit is used to receive signals from other devices outside the device and transmit them to the processor or send signals from the processor to other devices outside the device, and the processor is used to implement the method as described in any one of claims 14 to 19 through logic circuits or executing code instructions.

26. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and the instructions are executed on a computer to enable the computer to execute the method of any one of claims 1 to 13, or the method of any one of claims 14 to 19.

27. A computer program product, characterized in that The device comprises a computer program or an instruction, and when the computer program or the instruction is executed by the device, the method according to any one of claims 1 to 13 is executed, or the method according to any one of claims 14 to 19 is executed.

28. A chip, characterized in that: The chip comprises a processor, which is coupled to a memory and is used to execute a computer program or instruction stored in the memory, so that the chip implements the method of any one of claims 1 to 13, or implements the method of any one of claims 14 to 19.

29. A communication system, characterized in that: include: A first communication device, the first communication device being configured to perform the method according to any one of claims 1 to 13; A second communication device, wherein the second communication device is configured to execute the method according to any one of claims 14 to 19.

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