Communication method and apparatus

Abstract

The present application relates to the technical field of communications, and provides a communication method and apparatus. The method comprises: determining a third carrier on the basis of M first carriers and / or N second carriers, wherein one first carrier among the M first carriers is a carrier corresponding to one QoS flow among M QoS flows, one second carrier among the N second carriers is a carrier corresponding to one PC5-S message among N PC5-S messages, and M and N are positive integers; and transmitting a PC5-RRC message on the third carrier. Because a second carrier corresponding to a PC5-S message and a first carrier corresponding to a QoS flow can meet the transmission requirements of a terminal device, the third carrier determined on the basis of the first carriers and / or the second carriers can meet the requirements of the terminal device for transmitting the PC5-RRC message. Therefore, by means of the solution, the carrier for transmitting the PC5-RRC message can be reasonably determined, thereby improving the communication quality of an SL.

Description

Communication method and device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 28, 2023, with application number 202311290262.1 and application name “Communication Method and Device,” the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and more particularly, to a communication method and apparatus. Background Art

[0003] The link that transmits data between terminal devices on the proximity-based services communication 5 (PC5) port is called a sidelink (SL) or a direct link. Terminal devices transmit one or more of data and signaling over a radio bearer. The radio bearer used for signaling on the PC5 port is called a sidelink signaling radio bearer (SL SRB). The SL SRB can carry PC5-radio resource control (PC5-RRC) messages and PC5 signaling (PC5-S) messages.

[0004] However, the terminal device cannot reasonably determine the carrier to be used for the PC5-RRC message, thereby degrading the communication quality of the SL.

[0005] Summary of the Invention

[0006] The present application provides a communication method and apparatus that can reasonably determine the carrier used to transmit PC5-RRC messages and improve the communication quality of SL.

[0007] In a first aspect, a communication method is provided, which can be executed by a terminal device, or by a component in the terminal device (for example, a processor, a chip, or a chip system, etc.), or by a logic module or software that can implement all or part of the terminal device functions.

[0008] The method includes: determining a third carrier based on M first carriers and / or N second carriers, wherein a first carrier among the M first carriers is a carrier corresponding to a QoS flow among M quality of service (QoS) flows, and a second carrier among the N second carriers is a carrier corresponding to a PC5-S message among N PC5-S messages, and M and N are positive integers; and transmitting a PC5-RRC message on the third carrier.

[0009] Based on the above solution, the third carrier corresponding to the PC5-RRC message can be determined based on the first carrier and / or the second carrier. The first carrier corresponding to the PC5-S message and the second carrier corresponding to the QoS flow can meet the transmission requirements of the terminal device. Therefore, the third carrier determined based on the first carrier and / or the second carrier can meet the terminal device's requirements for transmitting the PC5-RRC message. Therefore, the above solution can reasonably determine the carrier used to transmit the PC5-RRC message, thereby improving the communication quality of the SL.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the third carrier is a union or intersection of K first carriers among the M first carriers, 2≤K≤M; or, the third carrier is a union or intersection of L second carriers among the N second carriers, 2≤L≤N; or, the third carrier is a union or intersection of K first carriers among the M first carriers and L second carriers among the N second carriers, K≤M, L≤N, and K and L are positive integers.

[0011] Based on the above solution, the third carrier corresponding to the PC5-RRC message can be determined by taking the union or intersection of the first carrier and / or the second carrier. The first carrier corresponding to the PC5-S message and the second carrier corresponding to the QoS flow can meet the transmission requirements of the terminal device. Therefore, the union or intersection of the first carrier and / or the second carrier can also meet the terminal device's need to transmit the PC5-RRC message. Therefore, the above solution can reasonably determine the carrier used to transmit the PC5-RRC message, thereby improving the communication quality of the SL.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the third carrier is one of the M first carriers corresponding to a QoS flow with the highest priority, the smallest packet delay budget (PDB) or the smallest packet error rate (PER) among the M QoS flows.

[0013] The carrier corresponding to the QoS flow with the highest priority, smallest PDB, or smallest PER is the carrier that can meet the transmission requirements of the terminal device. Therefore, the third carrier can also meet the terminal device's needs for transmitting PC5-RRC messages. The above solution achieves the reasonable determination of the carrier for transmitting PC5-RRC messages, thereby improving the communication quality of the SL.

[0014] In combination with the first aspect, in certain implementations of the first aspect, the third carrier is at least one of a carrier supported by a cell where the terminal device is located, a carrier supported by the terminal device, or a carrier supported by an opposite terminal device of the terminal device.

[0015] Based on the above solution, the third carrier is at least one of a carrier supported by the cell in which the terminal device is located, a carrier supported by the terminal device, or a carrier supported by the terminal device's peer terminal device. Therefore, the third carrier can meet the terminal device's needs for transmitting PC5-RRC messages. The above solution reasonably determines the carrier used to transmit PC5-RRC messages, thereby improving SL communication quality.

[0016] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: reporting information of the third carrier to a network device; receiving first information from the network device, the first information corresponding to a fourth carrier, and the third carrier including the fourth carrier.

[0017] Based on the above solution, the terminal device sends information about the third carrier to the network device, which helps the network device to correctly configure the carrier for the terminal device, so that the terminal device can transmit PC5-RRC messages on the third carrier, thereby improving the communication quality of SL.

[0018] In combination with the first aspect, in certain implementations of the first aspect, transmitting the PC5-RRC message on the third carrier includes: transmitting the PC5-RRC message on the fourth carrier according to the first information.

[0019] In combination with the first aspect, in some implementations of the first aspect, the method further includes: reporting second information to the network device, where the second information is used to indicate that the information of the third carrier corresponds to the PC5-RRC message.

[0020] Based on the above scheme, the network device can associate the information of the third carrier with the PC5-RRC message according to the second information reported by the terminal device, thereby helping the network device to correctly configure the carrier for the terminal device, so that the terminal device can transmit the PC5-RRC message on the third carrier, thereby improving the communication quality of SL.

[0021] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: receiving a first scheduling request (SR) configuration from the network device, the first SR configuration being the SR configuration of the PC5-RRC message; receiving a second SR configuration from the network device, the second SR configuration being the SR configuration of the PC5-S message, the first SR configuration being different from the second SR configuration; and sending an SR to the network device according to the first SR configuration, the SR being used to request the network device to send the first information.

[0022] Based on the above solution, the SR configuration of SL-SRB3 is different from that of other SL SRBs, so that the network device can distinguish whether the SR is requesting resources for transmitting PC5-RRC messages or resources for transmitting PC5-S messages, thereby enabling the network device to use the correct carrier to schedule the transmission of PC5-RRC messages and improve the communication quality of SL.

[0023] On the second aspect, a communication method is provided, which can be executed by a network device, or by a component in the network device (for example, a processor, chip, or chip system, etc.), or by a logic module or software that can implement all or part of the network device functions.

[0024] The method includes: receiving information about a third carrier from a terminal device, the third carrier being related to M first carriers and / or N second carriers, wherein a first carrier among the M first carriers is a carrier corresponding to a QoS flow among M QoS flows, and a second carrier among the N second carriers is a carrier corresponding to a PC5-S message among N PC5-S messages, and M and N are positive integers; and sending first information to the terminal device, the first information corresponding to a fourth carrier, the third carrier including the fourth carrier, and the fourth carrier being used to transmit PC5-RRC messages.

[0025] Based on the above solution, the terminal device sends information about the third carrier to the network device, which helps the network device to correctly configure the carrier for the terminal device, so that the terminal device can transmit PC5-RRC messages on the third carrier, thereby improving the communication quality of SL.

[0026] In combination with the second aspect, in some implementations of the second aspect, the method further includes: receiving second information from the terminal device, where the second information is used to indicate that the information of the third carrier corresponds to the PC5-RRC message.

[0027] Based on the above scheme, the network device can associate the information of the third carrier with the PC5-RRC message according to the second information reported by the terminal device, thereby helping the network device to correctly configure the carrier for the terminal device, so that the terminal device can transmit the PC5-RRC message on the third carrier, thereby improving the communication quality of SL.

[0028] In combination with the second aspect, in certain implementations of the second aspect, the method further includes: sending a first SR configuration to the terminal device, the first SR configuration being the SR configuration of the PC5-RRC message; sending a second SR configuration to the terminal device, the second SR configuration being the SR configuration of the PC5-S message, the first SR configuration being different from the second SR configuration; and receiving an SR from the terminal device according to the first SR configuration, the SR being used to request the sending of the first information.

[0029] Based on the above solution, the SR configuration of SL-SRB3 is different from that of other SL SRBs, so that the network device can distinguish whether the SR is requesting resources for transmitting PC5-RRC messages or resources for transmitting PC5-S messages, thereby enabling the network device to use the correct carrier to schedule the transmission of PC5-RRC messages and improve the communication quality of SL.

[0030] According to a third aspect, a communication device is provided, comprising a processor, wherein the processor is configured to enable the communication device to execute the first aspect and any possible method of the first aspect by executing a computer program or instruction, or by processing a circuit.

[0031] In one possible implementation, the communication device further includes a memory for storing the computer program or instruction. Further, the processor is specifically configured to call and execute the computer program or computer instruction stored in the memory, so that the processor implements any one of the implementations of the first aspect or the second aspect.

[0032] In one possible implementation, the communication device further includes a transceiver (also referred to as a communication interface), the transceiver being configured to input and / or output signals via the communication interface, and the processor being configured to control the transceiver to transmit and receive signals.

[0033] In a fourth aspect, a communication device is provided, comprising a processing circuit (also referred to as a processor) and an input / output interface (also referred to as an interface circuit), the input / output interface being used to input and / or output signals, the processing circuit being used to execute the first aspect and any possible method of the first aspect; or the processing circuit being used to execute the second aspect and any possible method of the second aspect.

[0034] In a possible implementation, the processor is configured to communicate with other devices via an interface circuit and execute the method described in the first or second aspect.

[0035] In a fifth aspect, a communication device is provided. The communication device may be a terminal device, or a device or module for performing terminal device functions; the communication device may be a network device, or a device or module for performing network device functions.

[0036] In one possible implementation, the communication device may include a module or unit corresponding to each of the methods / operations / steps / actions described in the first aspect. The module or unit may be a hardware circuit, software, or a combination of hardware circuit and software.

[0037] In another possible implementation, the communication device may include a module or unit corresponding to each of the methods / operations / steps / actions described in the second aspect. The module or unit may be a hardware circuit, software, or a combination of hardware circuit and software.

[0038] In the sixth aspect, a computer-readable storage medium is provided, on which a computer program or instruction is stored. When the computer program or the instruction is run on a computer, the first aspect and any possible method of the first aspect are executed; or, the second aspect and any possible method of the second aspect are executed.

[0039] In the seventh aspect, a computer program product is provided, comprising a computer program or instructions, which, when run on a computer, causes the first aspect and any possible method of the first aspect to be executed; or causes the second aspect and any possible method of the second aspect to be executed.

[0040] In an eighth aspect, a communication device is provided, comprising a processor, connected to a memory, configured to call a program stored in the memory to execute any possible method of the first or second aspect. The memory may be located within or outside the communication device. The processor may include one or more processors.

[0041] In one implementation, the communication device of the third, fourth, and fifth aspects may be a chip or a chip system.

[0042] In a ninth aspect, a chip device is provided, comprising a processor for calling a computer program or computer instruction in a memory so that the processor executes any one of the implementation methods of the first or second aspect above.

[0043] Optionally, the processor is coupled to the memory via an interface.

[0044] In a tenth aspect, a communication system is provided, which includes a terminal device and a network device; the terminal device is used to execute the method shown in the first aspect, and the network device is used to execute the method shown in the second aspect.

[0045] The description of the beneficial effects of any of the third to tenth aspects etc. may refer to the description of the beneficial effects of the first or second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] FIG1 is a schematic diagram of an architecture of a communication system applicable to an embodiment of the present application.

[0047] FIG2 is a schematic flowchart of a communication method provided in an embodiment of the present application.

[0048] FIG3 is a schematic flowchart of another communication method provided in an embodiment of the present application.

[0049] FIG4 is a schematic flowchart of another communication method provided in an embodiment of the present application.

[0050] FIG5 is a schematic flowchart of another communication method provided in an embodiment of the present application.

[0051] FIG6 is a schematic block diagram of a communication device according to an embodiment of the present application.

[0052] FIG7 is a schematic block diagram of another communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0053] The technical solution in this application will be described below with reference to the accompanying drawings.

[0054] The technical solutions provided in this application can be applied to various communication systems, such as: fifth generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation (6G) mobile communication system. The technical solutions provided in this application can also be applied to device to device (D2D) communication, machine to machine (M2M) communication, machine type communication (MTC), and Internet of Things (IoT) communication systems or other communication systems. This application is not limited to this.

[0055] With the development of communication technology, communication systems will not only support traditional communications, but also support vehicle-to-everything (V2X) communication (also known as Internet of Vehicles communication), vehicle-to-vehicle (V2V) communication (also known as vehicle-to-vehicle communication), vehicle-to-infrastructure (V2I) communication (also known as vehicle-to-infrastructure communication), vehicle-to-pedestrian (V2P) communication (also known as vehicle-to-pedestrian communication), and vehicle-to-network (V2N) communication (also known as vehicle-to-network communication). For example, communication systems may also support next-generation wireless local area network systems.

[0056] The terminal device in the embodiment of the present application can be referred to as a terminal. The terminal device can be a device with wireless transceiver function. The terminal device can be mobile or fixed. The terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on the water surface (such as a ship, etc.); it can also be deployed in the air (for example, on an airplane, a balloon, and a satellite, etc.). The terminal device may include a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and / or a wireless terminal device in a smart home. The terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device or computing device with wireless communication capabilities, a vehicle-mounted device, a wearable device, a terminal device in the fifth generation (5G) network, or a terminal device in a future-evolved public land mobile network (PLMN), etc. The terminal device may also sometimes be referred to as user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc. Optionally, the terminal device may communicate with multiple access network devices of different technologies. For example, the terminal device may communicate with an access network device that supports LTE, or with an access network device that supports 5G, or may be dual-connected with an access network device that supports LTE and an access network device that supports 5G. This application is not limited thereto.

[0057] In this application, the device for implementing the function of the terminal device can be the terminal device; it can also be a device that can support the terminal device to implement the function, such as a chip system, a hardware circuit, a software module, or a hardware circuit and a software module. The device can be installed in the terminal device or can be used in combination with the terminal device. In the technical solution provided in this application, the technical solution provided in this application is described by taking the device for implementing the function of the terminal device as a terminal device, and the terminal device as a UE as an example.

[0058] The network device in the embodiment of the present application may also be referred to as an access network (Radio Access Network, RAN) device.

[0059] RAN equipment is a node or device that connects a terminal device to a wireless network. RAN equipment can also be called a base station. Examples of RAN equipment include, but are not limited to, base stations, next-generation node B (gNB) in 5G, evolved node B (eNB), radio network controller (RNC), node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved node B, or HNB), base band unit (BBU), transmitting and receiving point (TRP), transmitting point (TP), and / or mobile switching center. Alternatively, the access network device may also be at least one of a centralized unit (CU), a distributed unit (DU), a centralized unit control plane (CU-CP) node, a centralized unit user plane (CU-UP) node, an integrated access and backhaul (IAB), or a wireless controller in a cloud radio access network (CRAN) scenario. Alternatively, the access network device may be a relay station, an access point, an in-vehicle device, a terminal device, a wearable device, an access network device in a 5G network, or an access network device in a future evolved public land mobile network (PLMN).

[0060] In this application, the device for implementing the functions of an access network device may be the access network device; it may also be a device capable of supporting the access network device in implementing the functions, such as a chip system, a hardware circuit, a software module, or a hardware circuit and a software module. The device may be installed in the access network device or may be used in conjunction with the access network device. In the technical solutions provided in this application, the technical solutions provided in this application are described by taking the device for implementing the functions of the access network device as the access network device, and the access network device as a base station as an example.

[0061] FIG1 is a schematic diagram of an architecture of a communication system applicable to an embodiment of the present application.

[0062] The communication system to which the embodiments of the present application are applicable includes terminal devices, such as the terminal devices 121 and 122 shown in FIG1 , and network devices, such as the network device 110 shown in FIG1 . In addition, the communication system mainly includes two communication interfaces, such as a communication interface (Uu port) between the terminal device 121 and the network device 110, and a communication interface (PC5 port) between the terminal device 121 and the terminal device 122, wherein the Uu port is used for communication between the terminal device and the network device, and the PC5 port is used for side link communication between the terminal device and the terminal device. The link on the Uu port through which the terminal device sends data to the network device is called an uplink, and the link through which the terminal device receives data sent by the network device is called a downlink. The link for transmitting data between the terminal device and the terminal device on the PC5 port is called an SL or a direct link. The side link is generally used in scenarios such as device to device (D2D) where direct communication can be performed between devices. In this scenario, data transmission between devices does not need to pass through the network device.

[0063] V2X communication can be considered a form of D2D communication. For example, in V2X, each vehicle can be considered a terminal device. Data can be transmitted directly between terminals via the Link (SL), bypassing network equipment. This effectively reduces communication latency. Sidelinks can support unicast, multicast, or broadcast.

[0064] On the Uu port, one or more of data and radio resource control (RRC) signaling are transmitted between the terminal device and the network device through a radio bearer. Among them, the radio bearer used to transmit data is called a data radio bearer (DRB), and the bearer used to transmit RRC signaling is called a signaling radio bearer (SRB). A radio bearer includes a packet data convergence protocol (PDCP) entity and a radio link control (RLC) bearer. Among them, an RLC bearer includes an RLC entity and a corresponding logical channel (LCH). The configuration of the radio bearer is the configuration of the PDCP entity, RLC entity and LCH of the radio bearer. The configuration of the radio bearer needs to be able to guarantee the QoS requirements of the service transmitted through the radio bearer. At the Uu port, the configuration of the radio bearer is configured by the network device for the terminal device.

[0065] On the PC5 port, one or more of data and signaling is also transmitted between terminal devices via radio bearers. The radio bearers on the PC5 port are called sidelink radio bearers (SLRBs). In the Long Term Evolution (LTE) V2X system, radio bearers on the PC5 port are established by the transmitting and receiving terminal devices, respectively. The configuration of these radio bearers is either predefined by the standard or determined by the transmitting and receiving terminal devices themselves.

[0066] Each time a terminal device performs a SL transmission, it must perform logical channel prioritization (LCP), which involves selecting a destination and selecting an LCH. Destination selection refers to choosing which terminal device or devices to transmit the SL to, while LCH selection refers to choosing which LCH data to transmit.

[0067] The architecture applicable to the embodiment of the present application shown in Figure 1 is merely an example and is not limited to this. Any architecture capable of implementing the functions of the aforementioned devices is applicable to the embodiment of the present application. Furthermore, in future communications, the names of the interfaces such as the Uu port or PC5 port may remain unchanged or may be replaced by other names, and this application does not impose any restrictions on this.

[0068] It should also be understood that the above naming is only defined for the convenience of distinguishing different functions and should not constitute any limitation to this application. This application does not exclude the possibility of adopting other naming in 5G networks and other networks in the future. For example, in a 6G network, some or all of the above-mentioned devices may use the terminology in 5G, or other names may be used. The interface name between the various devices in Figure 1 is only an example. The name of the interface in the specific implementation may be other names, and this application does not make specific limitations on this. In addition, the name of the message (or signaling) transmitted between the above-mentioned devices is only an example and does not constitute any limitation on the function of the message itself.

[0069] Exemplarily, referring to Figure 1, the terminal device 121 and the terminal device 122 perform sidelink communication. The terminal device 121 can serve as a transmitting user equipment (TX UE), and the terminal device 122 can serve as a receiving user equipment (RX UE). The terminal device 121 can be in an in coverage (IC) state or an out of coverage (OOC) state. When the terminal device 121 is in an RRC connected state (RRC_connected), the terminal device 121 can obtain SL resources (used for SL transmission) from the base station, which is called the resource allocation mode of the base station scheduling mode (mode1). Specifically, the network device 110 can schedule SL resources for the terminal device 121 through downlink control information (DCI), or configure a SL configuration authorization (configured grant, CG) for the terminal device 121 through an RRC message.

[0070] When the terminal device 121 operates in autonomous contention mode (mode2) (for example, in RRC connected state, RRC inactive state (RRC_inactive), RRC idle state (RRC_idle), OOC state), the terminal device 121 can receive the configuration of the SL resource pool from the network device 110, or obtain the configuration of the SL resource pool from the pre-configuration. Then, the terminal device 121 selects SL resources in the SL resource pool for transmission. For example, the terminal device 121 can randomly select SL resources in the SL resource pool, or select SL resources in the SL resource pool based on the results of sensing or partial sensing.

[0071] SLRB includes a data radio bearer (DRB) for transmitting data, which can be called a "SL DRB". SLRB also includes an SRB for transmitting signaling, which is called a "SL SRB". SL SRB can carry PC5-RRC messages and PC5-S messages.

[0072] SL SRB3 is introduced for PC5-RRC messages, which are used to transmit PC5-RRC messages. For example, PC5-RRC data transmission messages. PC5-RRC messages can be equivalent to SL SRB3. For example, determining the LCH of a PC5-RRC message can be understood as determining the LCH of SL SRB3.

[0073] For PC5-S messages, three SL SRBs are introduced.

[0074] SL SRB0 is used to transmit unprotected PC5-S messages, or PC5-S messages before PC5-S security is established, or PC5-S messages used to establish unicast connections, such as direct communication request (DCR) messages. These messages are equivalent to SL SRB0.

[0075] SL SRB1 is used to transmit PC5-S messages establishing PC5-S security, such as direct security mode command messages and direct security mode complete messages. The above messages are equivalent to SL SRB1.

[0076] SL SRB2 is used to transmit protected PC5-S messages, or PC5-S messages after PC5-S security is established, such as direct communication accept messages, PC5-S link modification messages, or PC5-S link maintenance messages. These messages are equivalent to SL SRB2.

[0077] In addition, SL SRB4 is used to transmit a discovery message, which is equivalent to SL SRB4.

[0078] However, the terminal device cannot reasonably determine the carrier used to transmit the PC5-RRC message, thereby reducing the communication quality of the SL.

[0079] For example, carrier aggregation (CA) can combine resources from multiple frequency bands and use multiple carriers for data transmission, thereby increasing wireless network bandwidth and data transmission speeds, and improving communication coverage and reliability. Because terminal devices cannot determine the carrier used to transmit PC5-RRC messages, they may simply select a carrier for transmission, that is, select a legacy carrier, which makes it impossible to use SL CA technology, reducing SL communication quality.

[0080] Figure 2 is a schematic flow chart of a communication method 200 provided in an embodiment of the present application. This method 200 enables a terminal device to determine a carrier for transmitting a PC5-RRC message, thereby improving the communication quality of the SL. Some embodiments of this method 200 are described in detail below with reference to Figure 2.

[0081] S210. Determine a third carrier based on M first carriers and / or N second carriers, where one of the M first carriers is a carrier corresponding to a QoS flow in the M QoS flows, and one of the N second carriers is a carrier corresponding to a PC5-S message in the N PC5-S messages, and M and N are positive integers.

[0082] S220: Transmit a PC5-RRC message on the third carrier.

[0083] The above S210 can also be understood as determining the carrier corresponding to the PC5-RRC message according to the carrier corresponding to the QoS flow and / or the carrier corresponding to the PC5-S message.

[0084] The M first carriers may be one or more first carriers, and the N second carriers may be one or more second carriers. When there is one first carrier, M is 1; when there are multiple first carriers, M is a positive integer greater than or equal to 2. When there is one second carrier, N is 1; when there are multiple second carriers, N is a positive integer greater than or equal to 2.

[0085] A first carrier can be understood as a carrier set, which includes one or more carriers. A first carrier can also be understood as a carrier list, which includes one or more carriers. Furthermore, a first carrier can include one or more carriers. A first carrier can also be understood as one carrier or multiple carriers.

[0086] A second carrier can be understood as a carrier set or a carrier list. Furthermore, a second carrier can include one or more carriers. A second carrier can also be understood as a carrier or multiple carriers.

[0087] The M first carriers may be indicated by the upper layer of the terminal device, and the N second carriers may be indicated by the upper layer of the terminal device. For example, the upper layer of the terminal device may indicate to the access stratum (AS) the one or more carriers corresponding to each QoS flow, and the one or more carriers corresponding to the PC5-S message. In other words, the upper layer of the terminal device may indicate the M first carriers and the N second carriers to the AS layer. The upper layer may be a V2X layer, a PC5-S layer, a proximity-based services (ProSe) layer, etc., which is not limited in this application.

[0088] The above-mentioned M QoS flows or N PC5-S messages can belong to the same unicast connection as the PC5-RRC message. Alternatively, the above-mentioned M QoS flows, N PC5-S messages, and PC5-RRC messages can correspond to the same destination. It can be understood that the M first carriers can meet the needs of M QoS flows for unicast connection transmission, and the N second carriers can meet the needs of N PC5-S messages for unicast connection transmission. Therefore, the third carrier determined based on the M first carriers and N second carriers can also meet the needs of PC5-RRC unicast connection transmission. Therefore, the above scheme can more reasonably determine the carrier for transmitting PC5-RRC messages.

[0089] It should be noted that the above-mentioned PC5-S message can be understood as a DCR message, and can also be understood as a direct connection security mode control message, a direct connection security mode completion message, a direct connection communication reception message or other PC5-S messages (for example, a PC5-S link modification message, a PC5-S link maintenance message, etc.). In other words, the above-mentioned PC5-S message can be understood as a PC5-S message for establishing a unicast connection (or a PC5-S message before PC5-S security is established), a PC5-S message for establishing PC5-S security, a PC5-S message after PC5-S security is established, or a discovery message. In other words, the above-mentioned PC5-S message can be understood as SL SRB0, SL SRB1, SL SRB2 or SL SRB4. Among them, the carriers corresponding to different PC5-S messages (or different SL SRBs) can be the same or different.

[0090] Therefore, the second carrier may be the carrier corresponding to the DCR message, the direct connection security mode control message, the direct connection security mode completion message, the direct connection communication reception message or other PC5-S message. For example, other PC5-S messages may be PC5-S link modification messages, PC5-S link maintenance messages, etc. In other words, the second carrier may be the carrier corresponding to the PC5-S message for establishing a unicast connection (or the PC5-S message before PC5-S security is established), the PC5-S message for establishing PC5-S security, the PC5-S message after PC5-S security is established, or the discovery message. In other words, the second carrier may be the carrier corresponding to SL SRB0, SL SRB1, SL SRB2 or SL SRB4. The second carriers corresponding to different PC5-S messages (or different SL SRBs) may be the same or different.

[0091] A third carrier can be understood as a carrier set or a carrier list. Multiple third carriers can be understood as a carrier set or a carrier list. Furthermore, a third carrier can include one or more carriers. A third carrier can also be understood as a carrier or multiple carriers.

[0092] One third carrier may also be understood as one carrier, and multiple third carriers may also be understood as multiple carriers.

[0093] The third carrier can be understood as the carrier corresponding to the PC5-RRC message, or the carrier corresponding to SL SRB3. Furthermore, determining the third carrier can be understood as determining the carrier corresponding to the LCH of the PC5-RRC message, or the carrier corresponding to the LCH of SL SRB3. For other embodiments of S210, please refer to the following text and are not described in detail here.

[0094] In the case that there are multiple third carriers, the above S220 can be understood as transmitting the PC5-RRC message on one of the third carriers.

[0095] Based on the above solution, the third carrier corresponding to the PC5-RRC message can be determined based on the first carrier and / or the second carrier. The first carrier corresponding to the PC5-S message and the second carrier corresponding to the QoS flow can meet the transmission requirements of the terminal device. Therefore, the third carrier determined based on the first carrier and / or the second carrier can meet the terminal device's requirements for transmitting the PC5-RRC message. Therefore, the above solution can reasonably determine the carrier used to transmit the PC5-RRC message, thereby improving the communication quality of the SL.

[0096] The above S210 can be implemented in multiple ways. The following takes four ways as examples to introduce some embodiments of S210 in detail.

[0097] Mode 1: The third carrier is a union or intersection of K first carriers among the M first carriers, and 2≤K≤M.

[0098] The above value of K can be understood as K being greater than or equal to 2, and K being less than or equal to M. The following describes different values ​​of K.

[0099] K may be equal to M. For example, the upper layer indicates that three QoS flows correspond to carrier set 1, carrier set 2, and carrier set 3 (or referred to as first carrier 1, first carrier 2, and first carrier 3), respectively. Each carrier set (or each first carrier) may include one or more carriers, and the third carrier may be the union or intersection of carrier set 1, carrier set 2, and carrier set 3.

[0100] For example, carrier set 1 includes carrier 11 and carrier 12, carrier set 2 includes carrier 11 and carrier 22, and carrier set 3 includes carrier 11 and carrier 33. The third carrier may be the union of three carrier sets (or referred to as three first carriers), that is, the third carrier includes carrier 11, carrier 12, carrier 22, and carrier 33. Alternatively, the third carrier may be the intersection of three carrier sets (or referred to as three first carriers), that is, the third carrier includes carrier 11.

[0101] K can be less than M. For example, the upper layer indicates that three QoS flows correspond to the above-mentioned carrier set 1, carrier set 2, and carrier set 3 (or referred to as first carrier 1, first carrier 2, and first carrier 3). The third carrier can be the union or intersection of carrier set 1 and carrier set 2.

[0102] For example, the third carrier may be the union of the two carrier sets (or referred to as the two first carriers), that is, the third carrier includes carrier 11, carrier 12, and carrier 22. Alternatively, the third carrier may also be the intersection of the two carrier sets (or referred to as the two first carriers), that is, the third carrier includes carrier 11.

[0103] K is generally greater than or equal to 2, and the third carrier is a union or intersection of multiple first carriers.

[0104] In addition, K may also be 1. When K is 1, the third carrier is the first carrier. In other words, the third carrier is a first carrier among the M first carriers.

[0105] Mode 2: the third carrier is a union or intersection of L second carriers in the N second carriers, 2≤L≤N.

[0106] The above values ​​of L can be understood as L being greater than or equal to 2, and L being less than or equal to N. Different values ​​of L are described below.

[0107] L may be equal to N. For example, the upper layer indicates that three PC5-S messages correspond to carrier set 1, carrier set 2, and carrier set 3 (or referred to as second carrier 1, second carrier 2, and second carrier 3), respectively. Each carrier set (or each second carrier) may include one or more carriers, and the third carrier may be the union or intersection of carrier set 1, carrier set 2, and carrier set 3.

[0108] For example, carrier set 1 includes carrier 11 and carrier 12, carrier set 2 includes carrier 11 and carrier 22, and carrier set 3 includes carrier 11 and carrier 33. The third carrier may be the union of three carrier sets (or referred to as three second carriers), that is, the third carrier includes carrier 11, carrier 12, carrier 22, and carrier 33. Alternatively, the third carrier may be the intersection of three carrier sets (or referred to as three second carriers), that is, the third carrier includes carrier 11.

[0109] L can be less than N. For example, the upper layer indicates that three PC5-S messages correspond to the above-mentioned carrier set 1, carrier set 2, and carrier set 3 (or referred to as second carrier 1, second carrier 2, and second carrier 3). The third carrier can be the union or intersection of carrier set 1 and carrier set 2.

[0110] For example, the third carrier may be the union of the two carrier sets (or referred to as the two second carriers), that is, the third carrier includes carrier 11, carrier 12, and carrier 22. Alternatively, the third carrier may also be the intersection of the two carrier sets (or referred to as the two second carriers), that is, the third carrier includes carrier 11.

[0111] L is generally greater than or equal to 2, and the third carrier is a union or intersection of multiple second carriers.

[0112] In addition, L may also be 1. When L is 1, the third carrier is the second carrier. In other words, the third carrier is one of the N second carriers.

[0113] For the understanding of PC5-S message and the second carrier, please refer to the previous article and will not be repeated here.

[0114] Mode 3: The third carrier is a union or intersection of K first carriers among the M first carriers and L second carriers among the N second carriers, where K≤M, L≤N, and K and L are positive integers.

[0115] The value of K mentioned above can be understood as K being less than or equal to M. The value of L mentioned above can be understood as L being less than or equal to N.

[0116] When M is 1 and N is 1, K can be 1 and L can be 1. For example, the upper layer indicates that the QoS flow corresponds to carrier set 1 (or called first carrier 1), and the PC5-S message corresponds to carrier set 2 (or called second carrier 2). For example, carrier set 1 includes carrier 11 and carrier 12, and carrier set 2 includes carrier 11 and carrier 22. The third carrier can be the union of the above two carrier sets (or called a first carrier and a second carrier), that is, the third carrier includes carrier 11, carrier 12, and carrier 22. The third carrier can be the intersection of the above two carrier sets (or called a first carrier and a second carrier), that is, the third carrier includes carrier 11.

[0117] In the case where M takes an integer of 1 and N takes an integer greater than 2, K can take 1 and L can take an integer less than or equal to N. For example, L can still take 1, which is similar to the above-mentioned solution where K takes 1 and L takes 1, and reference can be made to the previous description. For another example, L can take 2. In this case, the QoS flow can correspond to carrier set 1 (or referred to as first carrier 1), and the two PC5-S messages can correspond to carrier set 2 and carrier set 3 (or referred to as second carrier 2 and second carrier 3, respectively). For example, carrier set 1 includes carrier 11 and carrier 12, carrier set 2 includes carrier 11 and carrier 22, and carrier set 3 includes carrier 11 and carrier 33. The third carrier can be the union of the above three carrier sets (or referred to as one first carrier and two second carriers), that is, the third carrier includes carrier 11, carrier 12, carrier 22, and carrier 33. The third carrier can be the intersection of the above three carrier sets (or referred to as one first carrier and two second carriers), that is, the third carrier includes carrier 11.

[0118] When M takes an integer greater than 2 and N takes 1, K can take an integer less than or equal to M, and L can take 1. For example, K can still take 1, which is similar to the above-mentioned solution of K taking 1 and L taking 1, and reference can be made to the previous description. For another example, K can take 2. In this case, the two QoS flows can correspond to carrier set 1 and carrier set 2 respectively (or respectively referred to as first carrier 1 and first carrier 2), and the PC5-S message can correspond to carrier set 3 (or referred to as second carrier 3). For example, carrier set 1 includes carrier 11 and carrier 12, carrier set 2 includes carrier 11 and carrier 22, and carrier set 3 includes carrier 11 and carrier 33. The third carrier can be the union of the above three carrier sets (or referred to as two first carriers and one second carrier), that is, the third carrier includes carrier 11, carrier 12, carrier 22 and carrier 33. The third carrier can be the intersection of the above three carrier sets (or referred to as two first carriers and one second carrier), that is, the third carrier includes carrier 11.

[0119] When M is an integer greater than or equal to 2 and N is an integer greater than or equal to 2, K can be an integer less than or equal to M, and L can be an integer less than or equal to N. For example, K can be 1 and L can be 1; K can be 1 and L can be 2; K can be 2 and L can be 1. The above three examples are similar to the previous schemes, and reference can be made to the previous description. For another example, K can be 2 and L can be 2. In this case, the two QoS flows can correspond to carrier set 1 and carrier set 2 (or respectively referred to as first carrier 1 and first carrier 2), and the two PC5-S messages can correspond to carrier set 3 and carrier set 4 (or respectively referred to as second carrier 3 and second carrier 4). For example, carrier set 1 includes carrier 11 and carrier 12, carrier set 2 includes carrier 11 and carrier 22, carrier set 3 includes carrier 11 and carrier 33, and carrier set 4 includes carrier 11 and carrier 44. The third carrier can be the union of the above four carrier sets (or referred to as two first carriers and two second carriers), that is, the third carrier includes carrier 11, carrier 12, carrier 22, carrier 33, and carrier 44. The third carrier may be an intersection of the above four carrier sets (or referred to as two first carriers and two second carriers), that is, the third carrier includes carrier 11.

[0120] The case where K is greater than 2 and / or L is greater than 2 can be referred to in the previous examples, which will not be repeated here. The understanding of the PC5-S message and the second carrier can be referred to in the previous text, which will not be repeated here.

[0121] Based on the above solution, the third carrier corresponding to the PC5-RRC message can be determined by taking the union or intersection of the first carrier and / or the second carrier. The first carrier corresponding to the PC5-S message and the second carrier corresponding to the QoS flow can meet the transmission requirements of the terminal device. Therefore, the union or intersection of the first carrier and / or the second carrier can also meet the terminal device's need to transmit the PC5-RRC message. Therefore, the above solution can reasonably determine the carrier used to transmit the PC5-RRC message, thereby improving the communication quality of the SL.

[0122] Mode 4: the third carrier is one of the M first carriers corresponding to a QoS flow with the highest priority, the smallest PDB, or the smallest PER among the M QoS flows.

[0123] The highest priority can also be understood as the lowest priority value. For example, the carrier corresponding to the QoS flow with the smallest logical channel priority (LCH priority) can be determined as the first carrier. It should be noted that the logical channel priority (LCH priority) here can also be called logical channel priority (LCH priority), but it is different from the aforementioned LCP (LCH prioritization).

[0124] Furthermore, the solution of the above-mentioned method 4 may include: when the priorities of multiple QoS flows among the M QoS flows are the highest, the third carrier is one of the M first carriers corresponding to a QoS flow with the smallest PDB or the smallest PER among the multiple QoS flows with the highest priority.

[0125] Alternatively, the solution of the above-mentioned solution 4 may include: when the PDBs of multiple QoS flows among the M QoS flows are all minimum, the third carrier is one of the M first carriers corresponding to a QoS flow with the highest priority or the smallest PER among the multiple QoS flows with the smallest PDB.

[0126] Alternatively, the solution of the above-mentioned solution 4 may include: when the PERs of multiple QoS flows among the M QoS flows are all minimum, the third carrier is one of the M first carriers corresponding to a QoS flow with the highest priority or the smallest PDB among the multiple QoS flows with the smallest PER.

[0127] The carrier corresponding to the QoS flow with the highest priority, smallest PDB, or smallest PER is the carrier that can meet the transmission requirements of the terminal device. Therefore, the third carrier can also meet the terminal device's needs for transmitting PC5-RRC messages. The above solution achieves the reasonable determination of the carrier for transmitting PC5-RRC messages, thereby improving the communication quality of the SL.

[0128] In some embodiments, the third carrier is at least one of a carrier supported by a cell where the terminal device is located, a carrier supported by the terminal device, or a carrier supported by an opposite terminal device of the terminal device.

[0129] That is to say, the third carrier is not only related to the first carrier and / or the second carrier, but is also at least one of a carrier supported by the cell where the terminal device is located, a carrier supported by the terminal device, or a carrier supported by an opposite terminal device of the terminal device.

[0130] For example, after determining the intersection or union of the first carrier and / or the second carrier through the above-mentioned methods 1 to 3, a carrier in the intersection or the union that can be supported by the cell where the terminal device is located, supported by the terminal device, or supported by the terminal device's opposite terminal device can be further determined as the third carrier.

[0131] For example, after determining the carrier corresponding to a QoS flow with the highest priority, the smallest PDB or the smallest PER through the above method 4, it is possible to further determine a carrier in the carrier that can be supported by the cell where the terminal device is located, supported by the terminal device or supported by the terminal device's opposite terminal device as the third carrier.

[0132] It can be understood that the carrier supported by the opposite terminal device can be indicated by the capability information of the opposite terminal device. The opposite terminal device can be a terminal device that receives the PC5-RRC message transmitted in the above S220, or another terminal device that has established a unicast connection with the terminal device in method 200 through the PC5-S message.

[0133] Based on the above solution, the third carrier is at least one of a carrier supported by the cell in which the terminal device is located, a carrier supported by the terminal device, or a carrier supported by the terminal device's peer terminal device. Therefore, the third carrier can meet the terminal device's needs for transmitting PC5-RRC messages. The above solution reasonably determines the carrier used to transmit PC5-RRC messages, thereby improving SL communication quality.

[0134] It should be noted that the PC5-RRC message in the above S220 can also be replaced by an SL medium access control layer control element (MAC CE) or physical (PHY) layer signaling. In other words, the same method can be used to determine the transmission carrier of the SL MAC CE or PHY layer signaling. For example, after executing the above S210 and the embodiments related to S210, the SL MAC CE or PHY layer signaling can be transmitted on the third carrier.

[0135] Figure 3 is a schematic flow chart of another communication method 300 provided in an embodiment of the present application. Figure 3 relates to the interaction between a terminal device and a network device. Method 300 can be applied to a terminal device in an RRC connected state. Method 300 can be combined with the aforementioned method 200. For example, S310 and S320 can be performed after S210. For another example, S310 and S320 can be performed before S220.

[0136] S310: The terminal device reports information about the third carrier to the network device. Correspondingly, the network device receives information about the third carrier from the terminal device, where the third carrier is associated with M first carriers and / or N second carriers, where one of the M first carriers is a carrier corresponding to one of the M Quality of Service (QoS) flows, and one of the N second carriers is a carrier corresponding to one of the N PC5-S messages, where M and N are positive integers.

[0137] For example, the terminal device sends sidelink user equipment information (SUI) to the network device, and the information of the third carrier may be carried in the SUI, or in other words, the SUI may include the information of the third carrier.

[0138] In some embodiments, the method 300 further includes: the terminal device reporting second information to the network device, the second information being used to indicate that the information about the third carrier corresponds to the PC5-RRC message. Correspondingly, the network device receives the second information from the terminal device.

[0139] As an example, the second information may be carried in the information of the third carrier, or in other words, the information of the third carrier may include the second information. The second information may be used to indicate that the information of the third carrier is associated with the PC5-RRC message. Alternatively, the second information may be used to indicate that the information of the third carrier is associated with the SL SRB3. In this case, the second information is an indication information located within the information of the third carrier, and the indication information is used to indicate that the information of the third carrier is associated with the PC5-RRC message / SL SRB3.

[0140] As another example, the information of the third carrier may be carried in the second information, and the name of the second information may indicate the information of the third carrier.

[0141] For example, the original name of the second information is "sl-TxInterestedFreqList". In the case where the second information includes information about the third carrier, the name of the second information may be "sl-TxInterestedFreqList-RRC", thereby indicating that the information about the third carrier is associated with the PC5-RRC message, or in other words, indicating that the information about the third carrier is associated with SL SRB3. In this case, the second information can be regarded as an information element (IE), which includes information about the third carrier. In other words, the second information is an information element name located outside the information about the third carrier, and the information element name is used to indicate that the information about the third carrier is associated with the PC5-RRC message / SL SRB3.

[0142] For another example, when a terminal device reports the information of the carrier corresponding to a QoS flow and the information of a third carrier, different information elements are used to indicate this. In this way, by changing the name of the information element carrying the information of the carrier corresponding to the QoS flow, the information of the carrier corresponding to the QoS flow and the information of the third carrier can be distinguished, allowing the network device to determine that the information of the carrier corresponding to the QoS flow is associated with the QoS flow, while the information of the third carrier is associated with the PC5-RRC message / SL SRB3.

[0143] Based on the above scheme, the network device can associate the information of the third carrier with the PC5-RRC message according to the second information reported by the terminal device, thereby helping the network device to correctly configure the carrier for the terminal device, so that the terminal device can transmit the PC5-RRC message on the third carrier, thereby improving the communication quality of SL.

[0144] S320: The terminal device receives first information from the network device, where the first information corresponds to a fourth carrier, and the third carrier includes the fourth carrier. Correspondingly, the network device sends first information to the terminal device, where the first information corresponds to a fourth carrier, and the third carrier includes the fourth carrier. The fourth carrier is used to transmit the PC5-RRC message.

[0145] The first information can be understood as authorization information or resource configuration information.

[0146] Exemplarily, the first information may be DCI. The first information may also be carried in DCI, or in other words, the DCI may include the first information. Exemplarily, the first information may be SL configured grant information. The first information may also be carried in SL configured grant information, or in other words, the SL configured grant information includes the first information.

[0147] The first information may correspond to the fourth carrier in multiple ways.

[0148] For example, the first information may carry or include the index of the fourth carrier (or the number of the fourth carrier). In this way, the first information can be understood as carrying or including information of the fourth carrier, and the terminal device can find the fourth carrier according to the index of the fourth carrier and transmit the PC5-RRC message on the fourth carrier.

[0149] For another example, the first information may be used to indicate some resources, which are resources on the fourth carrier. In this way, the first information can be understood as resource configuration information, and the terminal device can transmit the PC5-RRC message on these resources, thereby implementing the transmission of the PC5-RRC message on the fourth carrier.

[0150] For another example, the first information can be used to instruct the terminal device to transmit a PC5-RRC message on a fourth carrier. In this way, the first information can be understood as indication information, which specifically indicates the behavior of the terminal device. The difference from the aforementioned scheme that carries or includes the index of the fourth carrier is that the first information as indication information needs to carry more bits, and these bits are used to indicate that the terminal device specifically wants to transmit a PC5-RRC message on the fourth carrier. The index of the fourth carrier only requires fewer bits, and the specific behavior of the terminal device is determined by other means, such as specifying the specific behavior of the terminal device through a protocol, or indicating the specific behavior of the terminal device through other indication information.

[0151] Based on the above solution, the terminal device sends information about the third carrier to the network device, which helps the network device to correctly configure the carrier for the terminal device, so that the terminal device can transmit PC5-RRC messages on the third carrier, thereby improving the communication quality of SL.

[0152] Combining method 300 with the aforementioned method 200, in some embodiments, S220 includes: transmitting the PC5-RRC message on the fourth carrier according to the first information.

[0153] According to the first information, the terminal device can transmit the PC5-RRC message on the fourth carrier.

[0154] In some embodiments, when the terminal device selects the LCH for SL transmission, the LCH corresponding to the PC5-RRC message (or the LCH corresponding to SL-SRB3) can be selected only if the fourth carrier corresponding to the first information is included in the third carrier, or only if the fourth carrier corresponding to the first information corresponds to the third carrier. The LCH corresponding to the PC5-RRC message is associated with the third carrier.

[0155] For example, the third carrier determined by the terminal device is carrier 1, and the first information sent by the network device corresponds to carrier 1. The terminal device will select carrier 1 to transmit the PC5-RRC message. If the first information sent by the network device corresponds to carrier 2, the terminal device will not select carrier 2 to transmit the PC5-RRC message because carrier 2 does not correspond to carrier 1.

[0156] For another example, the third carrier determined by the terminal device is carrier set 1, and the first information sent by the network device corresponds to carrier set 2. Only when there are carriers belonging to carrier set 1 in carrier set 2, or in other words, only when the intersection of carrier set 2 and carrier set 1 is not an empty set, will the terminal device select a carrier that exists in both carrier set 1 and carrier set 2 to transmit the PC5-RRC message. If there are no carriers belonging to carrier set 1 in carrier set 2, or in other words, only when the intersection of carrier set 2 and carrier set 1 is an empty set, the terminal device will not select a carrier in carrier set 2 to transmit the PC5-RRC message.

[0157] Figure 4 is a schematic flow chart of another communication method 400 provided in an embodiment of the present application. Figure 4 involves the interaction between a terminal device and a network device, and method 400 can be applicable to a terminal device in an RRC connected state. Method 400 can be combined with the aforementioned method 200 and / or method 300, or method 400 can be executed alone. For example, S430 can be executed after S210. For another example, S430 can be executed before S220. For another example, S430 can be executed after S310. For another example, S430 can be executed before S320. Some embodiments of method 400 are described in detail below in conjunction with Figure 4.

[0158] S410: The terminal device receives a first SR configuration from the network device, where the first SR configuration is an SR configuration of a PC5-RRC message. Correspondingly, the network device sends the first SR configuration to the terminal device.

[0159] It should be noted that the first SR configuration in the above S410 includes the first SR configuration information (schedulingRequestConfig) and / or the first SR resource configuration information (SchedulingRequestResourceConfig). The first SR configuration information is the SR configuration information of the PC5-RRC message, and the first SR resource configuration information is the SR resource configuration information of the PC5-RRC message. In order to more clearly introduce the meaning of SR configuration information and SR resource configuration information, the meaning of SR is first introduced. When a terminal device sends data to a terminal device on the opposite end, the terminal device can send a buffer status report (buffer status reporting, BSR) to the network device. Through the BSR, the network device can know the amount of data to be sent. Thus, the network device can decide how many side link resources (SL grant) to allocate to the terminal device based on the amount of data to be sent in the BSR. In this process, if there is currently no uplink resource (UL grant) available to send the BSR, the terminal device first sends an SR to the network to inform the network device that there is data to be sent.

[0160] Among them, the uplink resources used to send SR are called "SR resources", and the terminal device can send SR to the network device through the SR resources. Before sending the SR, the network device can send SR configuration information to the terminal device, and the terminal device can determine the SR resources used to send the SR based on the SR configuration information. For example, the SR configuration information may include an SR identifier (schedulingRequestID), a prohibition timer for SR sending (SR-ProhibitTimer), a maximum number of SR retransmissions (SR-TransMax), etc. Among them, the SR identifier can also be called an "SR ID".

[0161] In addition to the SR configuration information, the network device may also configure SR resource configuration information for the terminal device at the transmitting end. The SR resource configuration information may include: SR ID, SR resource identifier (schedulingRequestResourceID), SR period and offset within the period (periodicityAndOffset), etc.

[0162] The first SR configuration is the SR configuration for the PC5-RRC message. This means the SR sent by the terminal device based on the first SR configuration is the SR for the PC5-RRC message. The SR for the PC5-RRC message can be used to request the network device to send the first information. The first information corresponds to the fourth carrier used to transmit the PC5-RRC message. This means the first SR configuration is the SR configuration for the PC5-RRC message. This also means the first SR configuration is the SR configuration corresponding to SL SRB3.

[0163] Similarly, the first SR configuration information is the SR configuration information of the PC5-RRC message. It can be understood that the SR sent by the terminal device according to the first SR configuration information is the SR of the PC5-RRC message, or it can be understood that the first SR configuration is the SR configuration information corresponding to SL SRB3.

[0164] Similarly, the first SR resource configuration information is the SR resource configuration information of the PC5-RRC message, which can be understood as the SR sent by the terminal device according to the first SR resource configuration information is the SR of the PC5-RRC message. It can also be understood as the first SR resource configuration information is the SR resource configuration information corresponding to SL SRB3.

[0165] In some embodiments, the SR ID of the first SR configuration is predefined by a protocol. In this way, the terminal device can determine the corresponding first SR configuration according to the SR ID predefined by the protocol.

[0166] In some other embodiments, the SR ID of the first SR configuration is indicated by the network device.

[0167] S420: The terminal device receives a second SR configuration from the network device, where the second SR configuration is the SR configuration of the PC5-S message, and the first SR configuration is different from the second SR configuration. Accordingly, the network device sends the second SR configuration to the terminal device.

[0168] It should be noted that the second SR configuration in the above S420 includes second SR configuration information and / or second SR resource configuration information. The second SR configuration information is the SR configuration information of the PC5-S message, and the second SR resource configuration information is the SR resource configuration information of the PC5-S message.

[0169] The second SR configuration is the SR configuration for the PC5-S message. This means the SR sent by the terminal device based on the second SR configuration is the SR for the PC5-S message. The SR for the PC5-S message can be used to request that the network device deliver configuration information corresponding to the carrier used to transmit the PC5-S message. This second SR configuration is the SR configuration for the PC5-S message, and can also be understood as the SR configuration corresponding to SL SRB0, SL SRB1, SL SRB2, or SL SRB4.

[0170] Similarly, the second SR configuration information is the SR configuration information of the PC5-S message. It can be understood that the SR sent by the terminal device according to the second SR configuration information is the SR of the PC5-S message, or it can be understood that the second SR configuration is the SR configuration information corresponding to SL SRB3.

[0171] Similarly, the second SR resource configuration information is the SR resource configuration information of the PC5-S message, which can be understood as the SR sent by the terminal device according to the second SR resource configuration information is the SR of the PC5-S message. It can also be understood as the second SR resource configuration information is the SR resource configuration information corresponding to SL SRB3.

[0172] The first SR configuration may be different from the second SR configuration in that the SR ID of the first SR configuration is different from the SR ID of the second SR configuration, or in that other information contained in the first SR configuration is different from other information in the second SR configuration. For example, the SR resource identifier of the first SR configuration is different from the SR resource identifier of the second SR configuration.

[0173] Among them, the SR ID of the first SR configuration is different from the SR ID of the second SR configuration. It can be understood that the SR ID in the SR configuration of the PC5-RRC message is different from the SR ID in the SR configuration of the PC5-S message. It can also be understood that the SR ID in the SR configuration corresponding to SL SRB3 is different from the SR ID in the SR configuration corresponding to SL SRB0 / 1 / 2 / 4.

[0174] In some embodiments, the SR ID of the second SR configuration is predefined by the protocol. In this way, the terminal device can determine the corresponding second SR configuration according to the SR ID predefined by the protocol.

[0175] In some other embodiments, the SR ID of the second SR configuration is indicated by the network device.

[0176] It should be noted that the above S410 and S420 may be executed simultaneously or at different times. The above first SR configuration and the second SR configuration may be carried in the same message or in different messages.

[0177] S430: The terminal device sends an SR to the network device according to the first SR configuration, wherein the SR is used to request the network device to send the first information. Correspondingly, the network device receives the SR from the terminal device according to the first SR configuration.

[0178] Based on the above solution, the SR configuration of SL-SRB3 is different from that of other SL SRBs, so that the network device can distinguish whether the SR is requesting resources for transmitting PC5-RRC messages or resources for transmitting PC5-S messages, thereby enabling the network device to use the correct carrier to schedule the transmission of PC5-RRC messages and improve the communication quality of SL.

[0179] Figure 5 is a schematic flow chart of another communication method 500 provided in an embodiment of the present application. Method 500 can be applied to a terminal device in an RRC connected state. Method 500 can be combined with the aforementioned method 200, method 300, and / or method 400, or method 500 can be performed independently. The following detailed description of some embodiments of method 500 is provided in conjunction with Figure 5.

[0180] S510 , the terminal device determines the fifth carrier corresponding to the PC5-S message.

[0181] For example, the AS layer of the terminal device may obtain information about the fifth carrier corresponding to the PC5-S message from an upper layer, and the terminal device may determine the fifth carrier based on the information about the fifth carrier.

[0182] The meaning of the PC5-S message can be found in the previous text and will not be repeated here. In some embodiments, different PC5-S messages correspond to different fifth carriers. That is, the PC5-S in S510 can be one or more, and can be multiple identical or different PC5-S messages.

[0183] S520: The terminal device reports the fifth carrier information to the network device. Correspondingly, the network device receives the fifth carrier information from the terminal device.

[0184] For example, the terminal device may send an SUI to the network device, and the information of the fifth carrier may be carried in the SUI, or in other words, the SUI includes the information of the fifth carrier.

[0185] In some embodiments, different PC5-S messages correspond to different fifth carrier information.

[0186] In some embodiments, the method 500 further includes: the terminal device reporting fourth information to the network device, the fourth information being used to indicate that the information of the fifth carrier corresponds to the PC5-S message. Correspondingly, the network device receives the fourth information from the terminal device.

[0187] As an example, the fourth information may be carried in the information of the fifth carrier, or in other words, the information of the fifth carrier may include the fourth information. The fourth information may be used to indicate that the information of the fifth carrier is associated with the PC5-S message. Alternatively, the fourth information may be used to indicate that the information of the fifth carrier is associated with SL SRB0 / 1 / 2 / 4. In this case, the fourth information is located within the information of the fifth carrier, and is used to indicate that the information of the fifth carrier is associated with the PC5-S message or SL SRB0 / 1 / 2 / 4.

[0188] For example, the information of the fifth carrier corresponding to the PC5-S message used to establish a unicast connection (or the PC5-S message between PC5-S security establishment) is associated with the fourth information of SL SRB0; for another example, the information of the fifth carrier corresponding to the PC5-S message used to establish PC5-S security is associated with the fourth information of SL SRB1; for another example, the information of the fifth carrier corresponding to the PC5-S message after PC5-S security establishment is associated with the fourth information of SL SRB2; for another example, the information of the fifth carrier corresponding to the discovery message is associated with the fourth information of SL SRB4.

[0189] As another example, information about the fifth carrier can be included in the fourth information, and the name of the fourth information can indicate the information about the fifth carrier. The fourth information can be considered an information element that includes information about the fifth carrier. In other words, the fourth information is the name of an information element located outside the information about the fifth carrier, and this information element name is used to indicate that the information about the fifth carrier is associated with the PC5-S message or SL SRB0 / 1 / 2 / 4.

[0190] In other words, information about different fifth carriers is carried in information elements with different names. For example, the information about the fifth carrier corresponding to the PC5-S message used for unicast connection establishment (or the PC5-S message during PC5-S security establishment) is carried in the information element with the first name; for another example, the information about the fifth carrier corresponding to the PC5-S message used for PC5-S security establishment is carried in the information element with the second name; for another example, the information about the fifth carrier corresponding to the PC5-S message after PC5-S security establishment is carried in the information element with the third name; for another example, the information about the fifth carrier corresponding to the discovery message is carried in the information element with the fourth name.

[0191] In some embodiments, the information of the carrier corresponding to the QoS flow and the information of the fifth carrier reported by the terminal device to the network device are different, or in other words, the information of the carrier corresponding to the QoS flow and the information of the fifth carrier reported by the terminal device to the network device are indicated by information elements with different names.

[0192] In some embodiments, the terminal device reports information about the third carrier corresponding to the PC5-RRC message / SL-SRB3 to the network device.

[0193] In some embodiments, any two of the information on the carrier corresponding to the QoS flow reported by the terminal device to the network device, the information on the third carrier, and the information on the fifth carrier are different, or in other words, any two of the information on the carrier corresponding to the QoS flow reported by the terminal device to the network device, the information on the third carrier, and the information on the fifth carrier are indicated by information elements with different names.

[0194] S530: The terminal device receives third information from the network device, where the third information corresponds to a sixth carrier, and the fifth carrier includes the sixth carrier.

[0195] The third information can be understood as authorization information or resource configuration information.

[0196] Exemplarily, the first information may be DCI. The first information may also be carried in DCI, or in other words, the DCI may include the first information. Exemplarily, the first information may be SL configured grant information. The first information may also be carried in SL configured grant information, or in other words, the SL configured grant information includes the first information.

[0197] The third information may correspond to the sixth carrier in various ways.

[0198] For example, the third information may carry or include the index of the sixth carrier (or the number of the sixth carrier). In this way, the third information can be understood as carrying or including information about the sixth carrier. The terminal device can find the sixth carrier according to the index of the sixth carrier and transmit the PC5-S message on the sixth carrier.

[0199] For another example, the third information may be used to indicate some resources, which are resources on the sixth carrier. In this way, the third information can be understood as resource configuration information, and the terminal device can transmit the PC5-S message on these resources, thereby implementing the transmission of the PC5-S message on the sixth carrier.

[0200] For another example, the third information can be used to instruct the terminal device to transmit a PC5-S message on the sixth carrier. In this way, the third information can be understood as indication information, which specifically indicates the behavior of the terminal device. The difference from the aforementioned scheme that carries or includes the index of the sixth carrier is that the third information as indication information needs to carry more bits, and these bits are used to instruct the terminal device to specifically transmit the PC5-S message on the sixth carrier. The index of the sixth carrier only requires fewer bits, and the specific behavior of the terminal device is determined by other means, such as specifying the specific behavior of the terminal device through a protocol, or indicating the specific behavior of the terminal device through other indication information.

[0201] S540: The terminal device transmits a PC5-S message on the sixth carrier.

[0202] In some embodiments, when the terminal device selects the LCH for SL transmission, only when the sixth carrier corresponding to the third information is included in the fifth carrier, or only when the sixth carrier corresponding to the third information corresponds to the fifth carrier, the LCH corresponding to the PC5-S message (or the LCH corresponding to SL-SRB0 / 1 / 2 / 4) can be selected.

[0203] For example, if the sixth carrier determined by the terminal device is carrier 1, and the third information sent by the network device corresponds to carrier 1, the terminal device will select carrier 1 to transmit the PC5-S message. If the third information sent by the network device corresponds to carrier 2, the terminal device will not select carrier 2 to transmit the PC5-S message because carrier 2 does not correspond to carrier 1.

[0204] For another example, the sixth carrier determined by the terminal device is carrier set 1, and the third information sent by the network device corresponds to carrier set 2. Only if there are carriers belonging to carrier set 1 in carrier set 2, or in other words, only if the intersection of carrier set 2 and carrier set 1 is not an empty set, will the terminal device select a carrier that exists in both carrier set 1 and carrier set 2 to transmit the PC5-S message. If there are no carriers belonging to carrier set 1 in carrier set 2, or in other words, only if the intersection of carrier set 2 and carrier set 1 is an empty set, the terminal device will not select a carrier in carrier set 2 to transmit the PC5-S message.

[0205] Based on the above solution, the terminal device sends information about the third carrier to the network device, which helps the network device to correctly configure the carrier for the terminal device, so that the terminal device can transmit PC5-S messages on the third carrier, thereby improving the communication quality of SL.

[0206] The following is an introduction to the device embodiment corresponding to the method embodiment of the present application. The following is only a brief introduction to the device, and the specific implementation steps and details of the solution can be referred to the method embodiment above.

[0207] To implement the various functions of the methods provided herein, both terminal devices and network devices may include hardware structures and / or software modules, with the aforementioned functions implemented in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Whether a particular function is implemented in the form of hardware structures, software modules, or a combination of hardware structures and software modules depends on the specific application and design constraints of the technical solution.

[0208] Figure 6 is a schematic block diagram of a communication device 600 according to an embodiment of the present application. The communication device 600 includes a processor 610 and a transceiver 620, which may be interconnected via a bus 630. The communication device 600 may be a terminal device or a network device.

[0209] Optionally, the communication device 600 may further include a memory 640. The memory 640 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or portable read-only memory (CD-ROM), and is used for related instructions and data.

[0210] The processor 610 may be one or more central processing units (CPUs). In the case where the processor 610 is a CPU, the CPU may be a single-core CPU or a multi-core CPU. The processor 610 may be a signal processor, a chip, or other integrated circuit that can implement the method of the present application, or a portion of the circuitry used for processing functions in the aforementioned processor, chip, or integrated circuit. In addition, the transceiver 620 may also be referred to as an input / output interface or a communication interface. The transceiver 620 is used for input or output of signals or data, and may also be an input / output circuit.

[0211] When the communication apparatus 600 is a terminal device, the communication apparatus 600 illustratively includes a processor 610 and a transceiver 620. The processor 610 is configured to determine a third carrier based on M first carriers and / or N second carriers, wherein one of the M first carriers is a carrier corresponding to one of the M Quality of Service (QoS) flows, and one of the N second carriers is a carrier corresponding to one of the N PC5-S messages, where M and N are positive integers. The transceiver 620 is configured to transmit a PC5-Radio Resource Control (RRC) message on the third carrier.

[0212] In some embodiments, the transceiver 620 is further configured to: report information of the third carrier to the network device, and receive first information from the network device, where the first information corresponds to a fourth carrier, and the third carrier includes the fourth carrier.

[0213] In some embodiments, the transceiver 620 is specifically configured to: transmit the PC5-RRC message on the fourth carrier according to the first information.

[0214] In some embodiments, the transceiver 620 is further configured to: report second information to the network device, where the second information is used to indicate that the information about the third carrier corresponds to the PC5-RRC message.

[0215] In some embodiments, the transceiver 620 is also used to: receive a first scheduling request SR configuration from the network device, the first SR configuration is the SR configuration of the PC5-RRC message, and to receive a second SR configuration from the network device, the second SR configuration is the SR configuration of the PC5-S message, the first SR configuration is different from the second SR configuration, and to send an SR to the network device according to the first SR configuration, the SR being used to request the network device to send the first information.

[0216] When the communication apparatus 600 is a network device, illustratively, the communication apparatus 600 includes a transceiver 620. The transceiver 620 is configured to receive information about a third carrier from a terminal device, where the third carrier is associated with M first carriers and / or N second carriers, where one of the M first carriers is a carrier corresponding to one of the M Quality of Service (QoS) flows, and one of the N second carriers is a carrier corresponding to one of the N PC5-S messages, where M and N are positive integers, and to send first information to the terminal device, where the first information corresponds to a fourth carrier, where the third carrier includes the fourth carrier, and the fourth carrier is used to transmit a PC5-Radio Resource Control (RRC) message.

[0217] In some embodiments, the transceiver 620 is further used to: receive second information from the terminal device, where the second information is used to indicate that the information of the third carrier corresponds to the PC5-RRC message.

[0218] In some embodiments, the transceiver 620 is also used to: send a first scheduling request SR configuration to the terminal device, the first SR configuration is the SR configuration of the PC5-RRC message; send a second SR configuration to the terminal device, the second SR configuration is the SR configuration of the PC5-S message, the first SR configuration is different from the second SR configuration, and is used to receive an SR from the terminal device according to the first SR configuration, and the SR is used to request the first information to be sent down.

[0219] The above description is merely exemplary. For details, please refer to the contents of the above method embodiments. The implementation of each operation in FIG6 may also correspond to the corresponding description of the method embodiments shown in FIG2 to FIG5.

[0220] Figure 7 is a schematic block diagram of another communication device 700 according to an embodiment of the present application. Communication device 700 may be a terminal device or a network device, or a chip or module within the terminal device or network device, configured to implement the methods described in the above embodiments. Communication device 700 includes a transceiver unit 710. The following provides an exemplary description of transceiver unit 710.

[0221] The transceiver unit 710 may include a transmitting unit and a receiving unit. The transmitting unit is used to perform the transmitting operation of the communication device, and the receiving unit is used to perform the receiving operation of the communication device. For ease of description, this embodiment of the application combines the transmitting unit and the receiving unit into a single transceiver unit. This is described here as a unified description and will not be repeated later.

[0222] When the communication apparatus 700 is a terminal device, illustratively, the transceiver unit 710 is configured to report information of the third carrier, etc., to a network device.

[0223] Optionally, the communication device 700 may further include a processing unit 720, which is used to execute the content of the terminal device involving processing, coordination and other steps.

[0224] When the communication device 700 is a network device, illustratively, the transceiver unit 710 is used to receive information about the third carrier from the terminal device.

[0225] Optionally, the communication device 700 may further include a processing unit 720, which is used to execute the content of steps involving processing, coordination, etc. of the network device.

[0226] The above contents are merely exemplary descriptions. When the communication device 700 is a terminal device or a network device, it will be responsible for executing the methods or steps related to the terminal device or the network device in the above method embodiments.

[0227] Optionally, the communication device 700 further includes a storage unit 730, which is used to store a program or code for executing the aforementioned method.

[0228] The device embodiments shown in Figures 6 and 7 are used to implement the contents described in Figures 2 to 5. The specific execution steps and methods of the devices shown in Figures 6 and 7 can refer to the contents described in the above method embodiments.

[0229] The present application also provides a chip, including a processor, for calling and executing instructions stored in a memory, so that a communication device equipped with the chip executes the methods in the above examples.

[0230] The present application also provides another chip, comprising: an input interface, an output interface, and a processor, wherein the input interface, the output interface, and the processor are connected via an internal connection path, and the processor is configured to execute code in a memory. When the code is executed, the processor is configured to execute the methods in the above examples. Optionally, the chip also includes a memory, which is configured to store computer programs or code.

[0231] The present application also provides a processor for coupling with a memory, and for executing the methods and functions involving a terminal device or a network device in any of the above embodiments.

[0232] In another embodiment of the present application, a computer program product including instructions is provided. When the computer program product is run on a computer, the method of the above embodiment is implemented.

[0233] The present application also provides a computer program. When the computer program is executed in a computer, the method of the aforementioned embodiment is implemented.

[0234] In another embodiment of the present application, a computer-readable storage medium is provided, which stores a computer program. When the computer program is executed by a computer, the method described in the above embodiment is implemented.

[0235] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0236] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0237] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0238] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0239] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0240] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0241] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: include: Determine a third carrier according to the M first carriers and / or the N second carriers, wherein a first carrier among the M first carriers is a carrier corresponding to a QoS flow among the M quality of service QoS flows, a second carrier among the N second carriers is a carrier corresponding to a PC5-S message among the N PC5-S messages, and M and N are positive integers; A PC5-Radio Resource Control RRC message is transmitted on the third carrier.

2. The method according to claim 1, characterized in that The M first carriers are indicated by an upper layer of the terminal device.

3. The method according to claim 2, characterized in that The upper layer includes the vehicle network V2X layer, the PC5-S layer or the adjacent service ProSe layer.

4. The method according to any one of claims 1 to 3, characterized in that The third carrier is a union or intersection of K first carriers among the M first carriers, 2≤K≤M; or, The third carrier is a union or intersection of L second carriers among the N second carriers, 2≤L≤N; or, The third carrier is a union or intersection of K first carriers among the M first carriers and L second carriers among the N second carriers, K≤M, L≤N, and K and L are positive integers.

5. The method according to any one of claims 1 to 3, characterized in that The third carrier is one of the M first carriers corresponding to a QoS flow with the highest priority, the smallest packet delay budget or the smallest packet error rate among the M QoS flows.

6. The method according to any one of claims 1 to 5, characterized in that The third carrier is at least one of a carrier supported by a cell where the terminal device is located, a carrier supported by the terminal device, or a carrier supported by an opposite terminal device of the terminal device.

7. The method according to any one of claims 1 to 6, characterized in that: Also includes: Reporting information of the third carrier to a network device; First information is received from the network device, where the first information corresponds to a fourth carrier, and the third carrier includes the fourth carrier.

8. The method according to claim 7, characterized in that The transmitting of the PC5-RRC message on the third carrier includes: The PC5-RRC message is transmitted on the fourth carrier according to the first information.

9. The method according to claim 7 or 8, characterized in that: Also includes: Report second information to the network device, where the second information is used to indicate that the information of the third carrier corresponds to the PC5-RRC message.

10. The method according to any one of claims 7 to 9, characterized in that Also includes: Receiving a first scheduling request SR configuration from a network device, where the first SR configuration is an SR configuration of a PC5-RRC message; receiving a second SR configuration from a network device, where the second SR configuration is an SR configuration of a PC5-S message, and the first SR configuration is different from the second SR configuration; According to the first SR configuration, an SR is sent to the network device, where the SR is used to request the network device to send the first information.

11. A communication method, characterized in that: include: Receive information about a third carrier from a terminal device, where the third carrier is associated with M first carriers and / or N second carriers, wherein a first carrier among the M first carriers is a carrier corresponding to a QoS flow among M quality of service QoS flows, a second carrier among the N second carriers is a carrier corresponding to a PC5-S message among N PC5-S messages, and M and N are positive integers; Sending first information to the terminal device, where the first information corresponds to a fourth carrier, the third carrier includes the fourth carrier, and the fourth carrier is used to transmit a PC5-radio resource control RRC message.

12. The method according to claim 11, characterized in that Also includes: Second information is received from the terminal device, where the second information is used to indicate that the information of the third carrier corresponds to the PC5-RRC message.

13. The method according to claim 11 or 12, characterized in that: Also includes: Sending a first scheduling request SR configuration to the terminal device, where the first SR configuration is an SR configuration of a PC5-RRC message; Sending a second SR configuration to the terminal device, where the second SR configuration is the SR configuration of the PC5-S message, and the first SR configuration is different from the second SR configuration; According to the first SR configuration, an SR is received from the terminal device, where the SR is used to request sending of the first information.

14. A communication device, characterized in that: include: The processor is configured to determine a third carrier according to M first carriers and / or N second carriers, wherein a first carrier among the M first carriers is a carrier corresponding to a QoS flow among M quality of service QoS flows, a second carrier among the N second carriers is a carrier corresponding to a PC5-S message among N PC5-S messages, and M and N are positive integers; A transceiver is used to transmit a PC5-radio resource control RRC message on the third carrier.

15. The device according to claim 14, characterized in that The M first carriers are indicated by an upper layer of the terminal device.

16. The device according to claim 15, characterized in that The upper layer includes the vehicle network V2X layer, the PC5-S layer or the adjacent service ProSe layer.

17. The device according to any one of claims 14 to 16, characterized in that The third carrier is a union or intersection of K first carriers among the M first carriers, 2≤K≤M; or, The third carrier is a union or intersection of L second carriers among the N second carriers, 2≤L≤N; or, The third carrier is a union or intersection of K first carriers among the M first carriers and L second carriers among the N second carriers, K≤M, L≤N, and K and L are positive integers.

18. The device according to any one of claims 14 to 16, characterized in that The third carrier is one of the M first carriers corresponding to a QoS flow with the highest priority, the smallest packet delay budget or the smallest packet error rate among the M QoS flows.

19. The device according to any one of claims 14 to 18, characterized in that The third carrier is at least one of a carrier supported by a cell where the terminal device is located, a carrier supported by the terminal device, or a carrier supported by an opposite terminal device of the terminal device.

20. The device according to any one of claims 14 to 19, characterized in that The transceiver is also used for: The information of the third carrier is reported to a network device, and first information is received from the network device, where the first information corresponds to a fourth carrier, and the third carrier includes the fourth carrier.

21. The device according to claim 20, characterized in that The transceiver is specifically used for: The PC5-RRC message is transmitted on the fourth carrier according to the first information.

22. The device according to claim 20 or 21, characterized in that The transceiver is also used for: Report second information to the network device, where the second information is used to indicate that the information of the third carrier corresponds to the PC5-RRC message.

23. The device according to any one of claims 20 to 22, characterized in that The transceiver is also used for: Receive a first scheduling request SR configuration from a network device, the first SR configuration is the SR configuration of a PC5-RRC message, and is used to receive a second SR configuration from the network device, the second SR configuration is the SR configuration of a PC5-S message, the first SR configuration is different from the second SR configuration, and is used to send an SR to the network device according to the first SR configuration, and the SR is used to request the network device to send the first information.

24. A communication device, characterized in that: include: A transceiver, used to receive information about a third carrier from a terminal device, the third carrier being related to M first carriers and / or N second carriers, wherein a first carrier among the M first carriers is a carrier corresponding to a QoS flow among M quality of service QoS flows, a second carrier among the N second carriers is a carrier corresponding to a PC5-S message among N PC5-S messages, M and N are positive integers, and used to send first information to the terminal device, the first information corresponding to a fourth carrier, the third carrier including the fourth carrier, and the fourth carrier being used to transmit a PC5-radio resource control RRC message.

25. The device according to claim 24, characterized in that The transceiver is also used for: Second information is received from the terminal device, where the second information is used to indicate that the information of the third carrier corresponds to the PC5-RRC message.

26. The device according to claim 24 or 25, characterized in that The transceiver is also used for: Sending a first scheduling request SR configuration to the terminal device, where the first SR configuration is an SR configuration of a PC5-RRC message; A second SR configuration is sent to the terminal device, where the second SR configuration is the SR configuration of the PC5-S message, the first SR configuration is different from the second SR configuration, and is used to receive an SR from the terminal device according to the first SR configuration, where the SR is used to request the first information to be sent.

27. A communication device, characterized in that: It comprises a processing circuit and an input / output interface, wherein the input / output interface is used to input and / or output signals, and the processing circuit is used to execute the method according to any one of claims 1 to 10, or the processing circuit is used to execute the method according to any one of claims 11 to 13.

28. A communication device, characterized in that: The method comprises at least one module, wherein the at least one module is used to execute the method according to any one of claims 1 to 10, or the at least one module is used to execute the method according to any one of claims 11 to 13.

29. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program or instructions, and when the computer program or the instructions are executed on a computer, the method according to any one of claims 1 to 10 is executed, or the method according to any one of claims 11 to 13 is executed.

30. A computer program product, characterized in that The method comprises a computer program code, and when the computer program code is executed, the method according to any one of claims 1 to 10 is implemented, or the method according to any one of claims 11 to 13 is implemented.

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