WO2020164443A1

WO2020164443A1 - Unicast transmission method and communication apparatus

Info

Publication number: WO2020164443A1
Application number: PCT/CN2020/074529
Authority: WO
Inventors: 彭文杰; 王君; 魏冬冬; 戴明增
Original assignee: 华为技术有限公司
Priority date: 2019-02-15
Filing date: 2020-02-07
Publication date: 2020-08-20
Also published as: CN111586643B; CN111586643A

Abstract

Provided in the present application are a unicast transmission method and a communication apparatus. The method comprises: a firs terminal device generates first data; and the first terminal device sends the first data, information of a destination identifier, and information of a target service identifier to a second terminal device, the information of the destination identifier being used for identifying the second terminal device, the information of the target service identifier being used for identifying a vehicle to everything (V2X) service corresponding to the first data, and at least one service identifier corresponding to the destination identifier comprising the target service identifier. According to the present application, unicast transmission of data of different services/different service types can be achieved between two terminal devices by sending first data, information of a destination identifier, and information of a target service identifier.

Description

Unicast transmission method and communication device

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910116325.9, and the application name is "Unicast Transmission Method and Communication Device" on February 15, 2019, the entire content of which is incorporated into this application by reference in.

Technical field

This application relates to the field of communication, and more specifically, to a method and communication device for unicast transmission.

Background technique

The Internet of Vehicles (vehicle to everything, V2X) is considered to be one of the fields with the most industrial potential and the clearest market demand in the Internet of Things system. It has the characteristics of wide application space, large industrial potential, and strong social benefits. The innovation and development of the communications industry, the construction of new models and business formats for automobiles and transportation services, the promotion of the innovation and application of autonomous driving technologies, and the improvement of transportation efficiency and safety are of great significance.

In a device-to-device (D2D) communication system, the sender device can initiate a direct communication unicast connection establishment process. After two terminal devices establish a unicast connection in D2D, all services can be connected via unicast Send it. At this time, the terminal device in the unicast mechanism creates a set of logical channels for the unicast connection, and all data is multiplexed with the set of logical channels for transmission.

Currently, V2X only supports broadcast services in long term evolution (LTE) technology, and each V2X service type has at least one frequency resource corresponding to it. In the new radio (NR) technology, if you want to achieve unicast transmission between two terminal devices and perform unicast communication according to the D2D mechanism, the data corresponding to different V2X services need to multiplex the same set of logical channels, namely Data corresponding to different V2X services may be multiplexed into a media access control (MAC) layer protocol data unit (PDU) for transmission, causing the receiving end terminal device to fail to recognize different V2X services. Therefore, how to implement unicast transmission of data of different services or different types of services between two terminal devices has become a technical problem to be solved urgently.

Summary of the invention

The present application provides a method and communication device for unicast transmission, which can implement unicast transmission of data of different services or different service types between two terminal devices.

In a first aspect, a method for unicast transmission is provided, including: a first terminal device generates first data; the first terminal device sends the first data, destination identification information, and target The information of the service identifier, wherein the information of the target identifier is used to identify the second terminal device, the information of the target service identifier is used to identify the vehicle networking V2X service corresponding to the first data, and the target identifier corresponds to The at least one service identifier of includes the target service identifier.

In this application, when the first terminal device sends the first data, it also sends the information of the target identifier of the second terminal device and the information of the target service identifier to which the first data belongs, so that the second terminal device can receive the first data. Identify the V2X service or service type corresponding to the first data, and realize the transmission of unicast service data for different services or service types between terminal devices.

With reference to the first aspect, in some implementations of the first aspect, the medium access control MAC protocol data unit of the first data includes the information of the target identifier and the information of the target service identifier; or, the The MAC protocol data unit of the first data includes the information of the target service identifier, and the information of the destination identifier is used to scramble at the physical layer when sending the first data; or, the first data The MAC protocol data unit of the media access control includes the information of the target service identifier and the first information, and the second information is used to scramble at the physical layer when the first data is sent, wherein the first information and the The second information is used to identify the target identifier; or, the media access control MAC protocol data unit of the first data includes the information of the target service identifier and the first information, and the side corresponding to the first data The uplink control SCI information includes second information, where the first information and the second information are used to identify the target identifier.

In this application, the form of sending the first data, the information of the target identifier, and the information of the target service identifier can take many different forms, and the information of the target identifier and the information of the target service can be carried in the MAC PDU of the first data. , The information of the target service identifier can also be carried in the MAC PDU of the first data, and all or part of the information of the target identifier is used to scramble at the physical layer when the first data is sent.

With reference to the first aspect, in some implementations of the first aspect, the media access control MAC protocol data unit of the first data includes information, and the indication information indicates that the first data is data transmitted by unicast .

In this application, the MAC PDU of the first data may also include information indicating that the first data is unicast transmission.

With reference to the first aspect, in some implementation manners of the first aspect, the media access control MAC protocol data unit of the first data includes an identifier of a logical channel group or an identifier of a logical channel.

In this application, the MAC PDU of the first data may include the identification of the logical channel group or the identification of the logical channel, and the identification of the logical channel group or the identification of the logical channel may be the identification of the logical channel group or the logical channel group configured by the network device. The identification of the channel enables two terminal devices to perform unicast transmission of multiple services to distinguish different services or service types to meet the requirements of their respective services.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the first terminal device sends a unicast request message to the second terminal device, and the unicast request message includes at least one request Information about a service identifier, the at least one requested service identifier includes the target service identifier; the first terminal device receives a request response message sent by the second terminal device, and the request response message includes the destination identifier.

In this application, a unicast connection can be established between the first terminal device and the second terminal device. When the first terminal device sends a unicast request message to the second terminal device, it can carry information requesting the establishment of a unicast communication service. . At the same time, the second terminal device will respond to the first terminal device at least one service accepted by the second terminal device in the requested service.

With reference to the first aspect, in some implementation manners of the first aspect, the request response message further includes information of at least one service identifier accepted by the second terminal device.

Exemplarily, the request response message may only include the information of the destination identifier, that is, it may indicate that the second terminal device accepts all the services requested by the first terminal device.

Exemplarily, the request response message may include the information of the destination identifier and the information of the accepted at least one service identifier, that is, the request response message may include the identification information of the second terminal device and the information of the service identifier accepted by the second terminal device.

Exemplarily, the request response message may include the information of the destination identifier, the information of the accepted at least one service identifier, and the information of the rejected at least one service identifier. That is, the request response message may include the identification information of the second terminal device and the second terminal device. The information of the service identification accepted by the terminal device and the information of the service identification rejected by the second terminal device.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the first terminal device sends report information to the network device, and the report information includes the information of the destination identifier and at least one service The identification information, wherein the at least one service identification is the service identification corresponding to the target identification; the first terminal device receives the configuration information sent by the network device and uses it for unicast communication with the second terminal device.

In a possible implementation manner, the report information further includes at least one piece of frequency information, and each piece of frequency information in the at least one piece of frequency information is frequency information corresponding to each piece of the at least one service.

In this application, the first terminal device may report the target identification information to the network device, that is, the identification information of the second terminal device that reports unicast communication to the network, and the information of at least one service identification accepted by the second terminal device, and Frequency information corresponding to each service in at least one service. According to the report information sent by the first terminal device, the network device can configure the unicast communication of the first terminal device to enable unicast communication with the second terminal device.

With reference to the first aspect, in some implementations of the first aspect, the configuration information is used to configure a logical channel group corresponding to each service in the at least one service.

In this application, configuration information can be used to configure the logical channel group corresponding to each service. Different services can correspond to different frequency information, or different services can correspond to different quality of service (QoS) parameters. Different services can be configured with different logical channels or logical channel groups to meet the needs of different services.

With reference to the first aspect, in some implementations of the first aspect, the configuration information is used to configure services in the service identification list to reuse the same logical channel configuration, and the configuration information includes the service identification list and the The identifier of the logical channel group corresponding to the service identifier list, wherein the service identifier list includes at least one service identifier.

In the embodiment of the present application, the network device may configure the same logical channel for multiple services, and the multiple services may be services with the same QoS or frequency requirements or overlapping parts, and the network device may configure the multiple services The same logical channel is reused, thereby reducing configuration resources.

With reference to the first aspect, in some implementations of the first aspect, each service in the at least one service corresponds to a logical channel configuration, and the configuration information includes any one of the following: the quality of service of each service The corresponding relationship between the QoS information and the logical channel group; or the corresponding relationship between the QoS information of each service and the logical channel, and the corresponding relationship between the logical channel and the logical channel group; the flow identifier of each service Correspondence with logical channel groups; or, the corresponding relationship between the flow identifier of each service and the logical channel, and the corresponding relationship between the logical channel and the logical channel group, wherein the flow identifier is QoS in the Internet of Vehicles Flow ID.

Exemplarily, each QoS flow may have the same QoS information (also referred to as QoS parameters), and the QoS information may be a 5G quality of service identifier (5G QoS identifier, 5QI) or a quality of service flow identifier (QoS flow identifier, QFI). ) Or V2X Quality of Service identifier (V2X QoS identifier, VQI), or other QoS parameters that can reflect service reliability, delay, priority, transmission rate, etc.

With reference to the first aspect, in some implementations of the first aspect, the configuration information further includes: at least one carrier corresponding to the destination identifier, at least one bandwidth part BWP included in each carrier of the at least one carrier, At least one resource pool included in the at least one BWP; or, at least one carrier corresponding to the target identifier, and at least one service identifier corresponding to each carrier in the at least one carrier.

With reference to the first aspect, in some implementations of the first aspect, the configuration information includes at least one uplink scheduling request (SR) configuration corresponding to the destination identifier, and each of the at least one SR configuration The SR configuration corresponds to at least one service identifier.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the first terminal device sends a buffer status report BSR to the network device, and the BSR includes an indication of the destination identifier Information, indication information of the target service, and indication information of the logical channel group corresponding to the target service.

Exemplarily, the indication information of the destination identifier carried in the BSR may be the destination ID or an index, and the index may indicate the position in the destination ID list reported by the first terminal device. The indication information of the target service may be the service ID or an index, and the index may indicate the position in the service ID list corresponding to the destination ID reported by the first terminal device. The indication information of the logical channel group may be a logical channel group identifier or an index. The index may indicate the position of the logical channel group in the corresponding logical channel group list configured by the network device for the first terminal device.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the terminal device sends an uplink scheduling request to the network device, and the row scheduling request includes the information of the destination identifier and Information of at least one service identifier corresponding to the destination identifier.

With reference to the first aspect, in some implementations of the first aspect, the at least one service reuses the same logical channel configuration, each service in the at least one service corresponds to a different logical channel group, and the configuration information includes The identifier of at least one logical channel group corresponding to each service.

Exemplarily, when at least one service reuses the same logical channel configuration, the network device may configure the first terminal device, and the configuration information may include the correspondence between the service ID and the logical channel group, for example, it may correspond to a service ID One or more logical channel group IDs. Alternatively, a corresponding resource pool can be configured for each logical channel ID. Or, multiple logical channel group IDs may correspond to one or more resource pools. Alternatively, one unicast connection may correspond to one or more resource pools, but the correspondence between logical channel groups and resource pools may not be configured.

With reference to the first aspect, in some implementations of the first aspect, the configuration information further includes information about at least one resource pool corresponding to each logical channel group in the at least one logical channel group.

With reference to the first aspect, in some implementations of the first aspect, the configuration information further includes the QoS information of each service and/or the identifier of the logical channel group corresponding to the flow identifier.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the first terminal device sends a buffer status report BSR to the network device, and the BSR includes an indication of the destination identifier Information and indication information of the logical channel group corresponding to the target service.

In a second aspect, a method for unicast transmission is provided, including: a first terminal device sends a first unicast request message to a second terminal device, wherein the first unicast request message includes first identification information, The first identification information is used for unicast communication of the V2X service of the first Internet of Vehicles; the first terminal device receives the first unicast request response message sent by the second terminal device, wherein the first unicast The request response message includes second identification information, and the second identification information is used for unicast communication of the first V2X service.

With reference to the second aspect, in some implementation manners of the second aspect, the first terminal device sending the first unicast request message to the second terminal device includes: the first terminal device sends the first unicast request message to the second terminal device At least one unicast request message is sent, the at least one unicast request message includes the first unicast request message, and each unicast request message in the at least one unicast request message corresponds to a V2X service.

With reference to the second aspect, in some implementations of the second aspect, the first unicast request message includes at least one identification information, the at least one identification information includes the first identification information, and the at least one identification Each identification information in the information corresponds to a V2X service.

In a third aspect, a method for unicast transmission is provided, including: a second terminal device receives first data sent by a first terminal device, information about a target identifier, and information about a target service identifier; The first data and the target service identifier information determine the target service corresponding to the first data, wherein the target identifier information is used to identify the second terminal device, and the target service identifier is The information is used to identify a vehicle networking V2X service, and at least one service identifier corresponding to the target identifier includes the target service identifier.

With reference to the third aspect, in some implementations of the third aspect, the medium access control MAC protocol data unit of the first data includes information about the target identifier and the target service identifier; or, the first The MAC protocol data unit of the data includes the information of the target service identifier, and the information of the destination identifier is used to scramble at the physical layer when sending the first data; or, the medium of the first data The access control MAC protocol data unit includes the information of the target service identification and the first information, and the second information is used to scramble at the physical layer when the first data is sent, wherein the first information and the first information The second information is used to identify the target identifier; or, the media access control MAC protocol data unit of the first data includes the information of the target service identifier and the first information, and the side chain corresponding to the first data The path control SCI information includes second information, where the first information and the second information are used to identify the destination identifier.

With reference to the third aspect, in some implementations of the third aspect, the medium access control MAC protocol data unit of the first data includes indication information, and the indication information indicates that the first data is transmitted by unicast data.

With reference to the third aspect, in some implementation manners of the third aspect, the identifier of the logical channel group or the logical channel corresponding to the medium access control MAC protocol data unit of the first data.

With reference to the third aspect, in some implementations of the third aspect, the method further includes: the first terminal device sends a unicast request message to the second terminal device, the unicast request message including at least one request Information about a service identifier, the at least one requested service identifier includes the target service identifier; the first terminal device receives a request response message sent by the second terminal device, and the request response message includes the destination identifier.

With reference to the third aspect, in some implementation manners of the third aspect, the request response message further includes information of at least one service identifier accepted by the second terminal device.

In a fourth aspect, a method for unicast transmission is provided, including: a second terminal device receives a first unicast request message sent by a first terminal device, wherein the first unicast request message includes first identification information The first identification information is used for unicast communication of the first Internet of Vehicles V2X service; the second terminal device sends a first unicast request response message to the first terminal device, wherein the first unicast The request response message includes second identification information, and the second identification information is used for unicast communication of the first V2X service.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the second terminal device receiving the first unicast request message sent by the first terminal device includes: the second terminal device receiving the first terminal device At least one unicast request message sent by the device, where the at least one unicast request message includes the first unicast request message, and each unicast request message in the at least one unicast request message corresponds to a V2X service.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first unicast request message includes at least one identification information, the at least one identification information includes the first identification information, and the at least one identification Each identification information in the information corresponds to a V2X service.

In a fifth aspect, a method for unicast transmission is provided, including: a network device receives report information sent by a first device, where the report information includes information about a destination identifier and information about at least one service identifier, wherein the at least one The service ID is the service ID corresponding to the target ID, each service ID in the at least one service ID corresponds to a kind of Internet of Vehicles V2X service, and the target ID is used to identify the unicast communication with the first terminal device The second terminal device; the network device sends configuration information to the first terminal device for unicast communication with the second terminal device.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the report information further includes at least one piece of frequency information, and each piece of frequency information in the at least one piece of frequency information is for each piece of the at least one service. Corresponding frequency information.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the configuration information is used to configure a logical channel group corresponding to each service in the at least one service.

With reference to the fifth aspect, in some implementations of the fifth aspect, the configuration information is used to configure services in the service identification list to reuse the same logical channel configuration, and the configuration information includes the service identification list and the The identifier of the logical channel group corresponding to the service identifier list, wherein the service identifier list includes at least one service identifier.

With reference to the fifth aspect, in some implementations of the fifth aspect, each service in the at least one service corresponds to a logical channel configuration, and the configuration information includes any one of the following: the quality of service of each service The corresponding relationship between the QoS information and the logical channel group; or the corresponding relationship between the QoS information of each service and the logical channel, and the corresponding relationship between the logical channel and the logical channel group; the flow identifier of each service Correspondence with logical channel groups; or, the corresponding relationship between the flow identifier of each service and the logical channel, and the corresponding relationship between the logical channel and the logical channel group, wherein the flow identifier is QoS in the Internet of Vehicles Flow ID.

With reference to the fifth aspect, in some implementations of the fifth aspect, the configuration information further includes: at least one carrier corresponding to the destination identifier, at least one bandwidth part BWP included in each carrier of the at least one carrier, At least one resource pool included in the at least one BWP; or, at least one carrier corresponding to the target identifier, and at least one service identifier corresponding to each carrier in the at least one carrier.

With reference to the fifth aspect, in some implementations of the fifth aspect, the configuration information includes at least one uplink scheduling request SR configuration corresponding to the destination identifier, and each SR configuration in the at least one SR configuration corresponds to at least one Business identity.

With reference to the fifth aspect, in some implementations of the fifth aspect, the method further includes: the network device receives a buffer status report BSR sent by the first terminal device, and the BSR includes the target identifier Indication information, indication information of the target service, and indication information of the logical channel group corresponding to the target service.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the method further includes: an uplink scheduling request sent by the first terminal device by the network device, and the row scheduling request includes the destination identifier Information and information of at least one service identifier corresponding to the destination identifier.

With reference to the fifth aspect, in some implementations of the fifth aspect, the at least one service reuses the same logical channel configuration, each service in the at least one service corresponds to a different logical channel group, and the configuration information includes The identifier of at least one logical channel group corresponding to each service.

With reference to the fifth aspect, in some implementations of the fifth aspect, the configuration information further includes information of at least one resource pool corresponding to each logical channel group in the at least one logical channel group.

With reference to the fifth aspect, in some implementations of the fifth aspect, the configuration information further includes the QoS information of each service and/or the identifier of the logical channel group corresponding to the flow identifier.

With reference to the fifth aspect, in some implementations of the fifth aspect, the method further includes: the network device receives a buffer status report BSR sent by the first terminal device, and the BSR includes the target identifier The indication information and the indication information of the logical channel group corresponding to the target service.

In a sixth aspect, a communication device is provided, including a processor. The processor is coupled with the memory and can be used to execute instructions in the memory to implement any one of the foregoing aspects and the method in any possible implementation manner of any aspect.

Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface.

In an implementation manner, the communication device is a first terminal device. When the communication device is the first terminal device, the communication interface may be a transceiver, or an input/output interface.

In another implementation manner, the communication device is a chip configured in the first terminal device. When the communication device is a chip configured in the first terminal device, the communication interface may be an input/output interface of the chip.

Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

In another implementation manner, the communication device may also be the first terminal device in any of the foregoing implementation manners, so as to implement the steps or functions of the first terminal device in any of the foregoing implementation manners.

In an implementation manner, the communication device is a second terminal device. When the communication device is a second terminal device, the communication interface may be a transceiver or an input/output interface.

In another implementation manner, the communication device is a chip configured in the second terminal device. When the communication device is a chip configured in the second terminal device, the communication interface may be an input/output interface of the chip.

In another implementation manner, the communication device may also be the second terminal device in any of the foregoing implementation manners, so as to implement the steps or functions of the second terminal device in any of the foregoing implementation manners.

In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation manner, the communication device is a chip configured in a network device. When the communication device is a chip configured in a network device, the communication interface may be an input/output interface of the chip.

In another implementation manner, the communication device may also be a network device in any of the foregoing implementation manners, so as to implement the steps or functions of the network device in any of the foregoing implementation manners.

Exemplarily, the communication device may include a receiving unit and a sending unit. For example, the transmitting unit may be a transmitter, and the receiving unit may be a receiver. In another implementation manner, for example, the transmitting unit and the receiving unit in the communication device of the present application may be implemented by the same module, for example, a transceiver circuit module may be used to implement this The functions of the sending unit and the receiving unit; the communication device may also include a processing unit, which may be a processor; the communication device may also include a storage unit, which may be a memory; the storage unit is used to store instructions, the The processing unit executes the instructions stored in the storage unit, so that the communication device executes any one of the above-mentioned aspects and the method in one of its optional embodiments. When it is a chip in a communication device, the processing unit can be a processor, and the receiving unit/sending unit can be an input/output interface, a pin or a circuit, etc.; the processing unit executes the instructions stored in the storage unit to make The communication device executes any one of the above aspects and the method in one of its optional embodiments. The storage unit may be a storage unit (for example, a register, a cache, etc.) in the chip, or may be a storage unit located in the communication device. A storage unit outside the chip (for example, read-only memory, random access memory, etc.).

In a seventh aspect, a processor is provided, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes any aspect and a method in any possible implementation manner of any aspect.

In a specific implementation process, the foregoing processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by the transmitter, and the input circuit and output The circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.

In an eighth aspect, a processing device is provided, including a processor and a memory. The processor is used to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter to execute any aspect and any method in any possible implementation manner of any aspect.

Optionally, there are one or more processors and one or more memories.

Optionally, the memory may be integrated with the processor, or the memory and the processor may be provided separately.

In the specific implementation process, the memory can be a non-transitory (non-transitory) memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be set in different On the chip, the embodiment of the present application does not limit the type of memory and the setting mode of the memory and the processor.

It should be understood that the related data interaction process, for example, sending the first data may be a process of outputting the first data from the processor, and receiving the first data may be a process of the processor receiving the first data. Exemplarily, the processed output data may be output to the transmitter, and the input data received by the processor may come from the receiver. Among them, the transmitter and receiver can be collectively referred to as a transceiver.

A processing device in the above eighth aspect may be a chip, and the processor may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; When implemented by software, the processor may be a general-purpose processor, which is implemented by reading software codes stored in a memory. The memory may be integrated in the processor, may be located outside the processor, and exist independently.

In a ninth aspect, a computer program product is provided. The computer program product includes: a computer program (also called code, or instruction), which when the computer program is run, causes the computer to execute any of the above aspects and any Any one of the possible implementation methods in one aspect.

In a tenth aspect, a computer-readable medium is provided, and the computer-readable medium stores a computer program (also called code, or instruction) when it runs on a computer to enable the computer to execute any of the above aspects and any Any one of the possible implementation methods in one aspect.

In an eleventh aspect, a communication system is provided, including any one or more of the following: the aforementioned network device, the aforementioned first terminal device, and the aforementioned second terminal device.

Description of the drawings

Figure 1 is a schematic diagram of an application scenario of an embodiment of the present application;

Figure 2 is a schematic diagram of a V2X service in the prior art;

Fig. 3 is a schematic diagram of a unicast transmission method according to an embodiment of the present application;

Fig. 4 is a schematic diagram of a unicast transmission method according to another embodiment of the present application;

Fig. 5 is a schematic diagram of logical channel management of a terminal device according to an embodiment of the present application;

Fig. 6 is a schematic diagram of logical channel management of a terminal device according to another embodiment of the present application;

Fig. 7 is a schematic diagram of a unicast transmission method according to another embodiment of the present application;

Fig. 8 is a schematic diagram of a unicast transmission method according to another embodiment of the present application;

Fig. 9 is a schematic diagram of logical channel management of a terminal device according to another embodiment of the present application;

Fig. 10 is a schematic structural diagram of a communication device provided according to an embodiment of the present application;

FIG. 11 is a schematic diagram of another structure of a communication device according to an embodiment of the present application;

FIG. 12 is a schematic diagram of still another structure of a communication device according to an embodiment of the present application;

Fig. 13 is a schematic diagram of still another structure of a communication device provided according to an embodiment of the present application.

detailed description

The technical solution in this application will be described below in conjunction with the drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, and broadband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE Time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WIMAX) communication system, the future fifth generation (5th generation, 5G) system or new radio (NR), etc.

The terminal equipment in the embodiments of the application may refer to user equipment, access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication devices, user agents, or User device. The terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), with wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or future evolution of the public land mobile network (PLMN) Terminal equipment, etc., this embodiment of the present application does not limit this.

The network device in the embodiment of the application may be a device used to communicate with terminal devices. The network device may be a global system for mobile communications (GSM) system or code division multiple access (CDMA) The base transceiver station (BTS) in the LTE system can also be the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolved base station (evolved) in the LTE system. NodeB, eNB or eNodeB), it can also be a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, access point, vehicle-mounted device, wearable device, and future The network equipment in the 5G network or the network equipment in the future evolved PLMN network, etc., are not limited in the embodiment of the present application.

In the embodiments of the present application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory). The operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. In addition, the embodiments of the application do not specifically limit the specific structure of the execution subject of the methods provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided according to the embodiments of the application. For example, the execution subject of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute the program.

In addition, various aspects or features of the present application can be implemented as methods, devices, or products using standard programming and/or engineering techniques. The term "article of manufacture" as used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CD), digital versatile discs (DVD)) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). In addition, various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.

The embodiments of the present application may be applied to an Internet of Things system, for example, a vehicle to everything (V2X) system. V2X refers to the provision of vehicle information through sensors, on-board terminals, etc. mounted on the vehicle, and communication between vehicles and vehicles, vehicles and people, vehicles and roadside infrastructure, and vehicles and networks through various communication technologies.

Fig. 1 is an example diagram of a system architecture to which an embodiment of the present application is applied. As shown in Figure 1, the communication system includes: V2X application server, V2X equipment (including V2X equipment 1 and V2X equipment 2), and network equipment. Communication between V2X devices is realized through the PC5 interface. The communication link between V2X devices is defined as a sidelink (SL). The communication between the V2X device and the V2X application server needs to be forwarded by the network device. For example, for the uplink, the V2X device at the sending end sends the V2X data to the network device through the Uu interface, and the network device sends the data to the V2X application server for processing, and then the V2X The application server delivers the V2X device to the receiver; for the downlink, the V2X application server sends the V2X data to the network device, and the network device sends the V2X data to the V2X device through the Uu interface.

It should be understood that the V2X device in FIG. 1 may be an Internet of Things device, such as a UE.

It should also be understood that the arrow flow in FIG. 1 is only exemplarily described with the V2X device 1 and does not constitute a limitation to the embodiment of the present application. In fact, the communication between the V2X device 1 and the V2X device 2 can also be bidirectional, and The V2X device 2 can also perform uplink communication with the network device, which is not specifically limited.

For example, as shown in Figure 2, the V2X service can specifically include three application requirements: V2V (Internet of Vehicles), V2P (Car-Pedestrian Communication), and V2I/N (Car-Infrastructure Communication/Network, Base Station Communication), as shown in Figure 2. Show. V2V refers to LTE-based inter-vehicle communication; V2P refers to LTE-based communication between vehicles and people (including pedestrians, cyclists, drivers, or passengers); V2I refers to LTE-based vehicles and roadside devices (RSU) communication, there is another type of V2N that can be included in V2I. V2N refers to the communication between LTE-based vehicles and base stations/networks. as shown in picture 2.

For ease of understanding, the relevant terms involved in this article are introduced below.

1. Centralized scheduling transmission mode (also known as Mode3)

The LTE system is the current mainstream wireless communication technology. It has formulated relevant standards for V2X service characteristics and transmission requirements, and supports V2X communication based on LTE. Among them, in the V2X communication based on the LTE system, side-link communication is the main communication method. In the side-link communication, data transmission between terminal devices may not be transferred through network equipment. Side link communication is mainly divided into two transmission modes, namely, centralized scheduling transmission mode (also referred to as Mode 3) and distributed transmission mode (also referred to as Mode 4).

Centralized scheduling transmission mode (also known as Mode3): In this mode, the terminal device needs to apply for resources from the network device before sending data, and send V2X service data according to the resources allocated by the network device. Since the resources of the terminal equipment are uniformly allocated by the network equipment, there will be no situation where adjacent terminal equipment is allocated the same resources. Therefore, the centralized transmission mode can ensure better transmission reliability. However, since signaling needs to be exchanged each time between the terminal equipment and the network equipment, relatively speaking, compared with the distributed transmission mode, the transmission delay of sending data in the centralized scheduling transmission mode is longer.

It should be noted that V2X of this type of mode in NR can also be called Mode1.

2. Distributed transmission mode (also called Mode4)

Distributed transmission mode (also known as Mode4): In a scenario with network coverage, network equipment configures a resource pool for terminal equipment through SIB messages or dedicated radio resource control (Dedicated RRC) signaling. When the terminal equipment sends V2X data, The data can be sent by random selection, based on the listening reservation mechanism, or based on the partial listening reservation mechanism from at least part of the resources acquired from the master-slave resource pool. In a scenario without network coverage, the terminal device autonomously sends data from at least part of the resources acquired from the resource pool in the pre-configuration information. The pre-configuration information may be a resource pool configured inside the terminal when the terminal leaves the factory, or may be information pre-configured by a network device and stored inside the terminal. Since terminal devices independently select resources, it may happen that different terminal devices select the same resource to send data, so transmission collisions may occur.

It should be noted that V2X of this type of mode in NR can also be called Mode2.

3. Buffer status report (buffer status report, BSR)

When the UE requests uplink resources from the network device through the SR, it only indicates whether it has uplink data to send, but does not indicate how much uplink data needs to be sent. The UE needs to send the BSR to the network device, and how much data in its uplink buffer needs to be sent, so that the network device can determine the size of the uplink resource allocated to the UE.

4. Logical channel group (logic channel group, LCG)

LCG refers to grouping one or more logical channels into a group. In order to reduce the number of information bits transmitted on the air interface, a buffer size value is bound to each logical channel group. The cache size carries 64 index values from 0 to 63, and each index value corresponds to the number of bytes in a different range.

It should be understood that the buffer size is not all the amount of data to be transmitted by the UE, nor the number of bytes of data to be transmitted in a certain logical channel, but the amount of data to be transmitted corresponding to a certain logical channel group. Each logical channel group has a buffer size value bound to it. When a certain logical channel group of the UE needs to send data, the buffer size value of the logical channel group can be reported.

In the prior art, LTE V2X only supports broadcast services and can transmit data of different V2X services. In NR technology, more communication types are supported, such as broadcast transmission, unicast transmission or multicast transmission. However, if according to the existing unicast communication mechanism, that is, the terminal device in the D2D technology initiates the establishment process of direct communication unicast transmission, then there is a unicast connection between the two terminal devices. When the data of multiple V2X services are transmitted, the data of different V2X services will be multiplexed with a set of logical channels, that is, the data of different V2X services will be multiplexed into one MAC PDU for transmission, which makes the receiving end terminal equipment unable to Identify different V2X business data.

In view of this, this application proposes a unicast transmission method and communication device. In V2X unicast communication, the sending end terminal device sends the first data, the information of the target identifier, and the information of the target service identifier, thereby ensuring that the receiving terminal The device can distinguish the data of different V2X services through the information of the target identifier and the target service identifier to meet the requirements of different services. Realize the unicast transmission of different services or data of different service types between two terminal devices.

The embodiments of the present application will be described in detail below in conjunction with specific examples. It should be noted that this is only to help those skilled in the art to better understand the embodiments of the present application, and does not limit the scope of the embodiments of the present application.

It should be understood that in the embodiments of the present application, "first", "second", etc. are only used to refer to different objects, and do not mean that there are other limitations on the referred objects.

It should also be understood that in the embodiments of the present application, "service" may also mean "service type".

Fig. 3 is a schematic interaction diagram of a unicast transmission method according to an embodiment of the present application. Among them, the unicast transmission method 100 of FIG. 3 can be applied to the network architecture of FIG. 1. Wherein, the unicast transmission method shown in FIG. 3 can be applied to the scenario of unicast communication of V2X services, and the unicast transmission method in FIG. 3 includes:

Step 110: The first terminal device generates first data.

Step 120: The first terminal device sends the first data, the information of the target identifier, and the information of the target service identifier to the second terminal device, where the information of the target identifier is used to identify the second terminal device, and the information of the target service identifier is used for Identifies the vehicle networking V2X service corresponding to the first data, and at least one service identifier corresponding to the target identifier includes the target service identifier. In this application, the second terminal device may determine the target service corresponding to the first data according to the information of the first data and the target service identifier.

Exemplarily, in the embodiment of the present application, the first terminal device may be a sending end terminal device, and the second terminal device may be a receiving end terminal device. The information of the destination identification can be the destination ID, the receiving end terminal device can be identified by the destination ID, and the information of the target service identification can be the service ID or service type ID of the first data, that is, the V2X service or V2X service type to which the first data belongs , For example, service provider identifier (provider service identifier, PSID) or intelligent transport systems application identifier (ITS-AID), or truncated PSID, or truncated ITS-AID, or by PSID /ITS-AID mapped to other identifiers; it can also be information used to identify the target service identifier, for example, the index of the target service identifier. It should be understood that before the first terminal device sends the first data to the second terminal device, the first terminal device and the second terminal device can interact with all service identification information, and the first terminal device and the second terminal device can each A list of business identifications is maintained. The index of the target business identification indicates the position of the target business identification in the list of business identifications, and which business or business type can be known through the index.

It should be understood that the first data is data obtained after the original data is processed by the MAC layer.

Optionally, in the embodiment of the present application, the first terminal device may send a unicast request message to the second terminal device. The unicast request message includes at least one requested service identification information, and the at least one requested service identification includes The target service identifier; the first terminal device receives a request response message sent by the second terminal device, and the request response message includes the target identifier.

In this application, the destination identifier information sent by the first terminal device may be the destination ID, and the destination ID may be the identifier received by the first terminal device and allocated by the second terminal device for the unicast transmission. In other words, the second terminal device can be determined through the destination ID.

For example, the first terminal device sends a unicast request message, and the unicast request message may include information about one or more service identifiers requested by the first terminal device. The second terminal device receives the unicast request message and sends a request response message to the first terminal device according to the accepted service or service type. The first terminal device may send the unicast request message by broadcasting, and the unicast request message may also include the identifier allocated by the first terminal device for the unicast transmission, which is used by the second terminal device to send to the first terminal device Data; may also include one or more identifiers of the second terminal device in the upper layer or the application layer (APP layer), so that the second terminal device can identify the unicast request message.

In a possible implementation manner, the request response message may only include the information of the destination identifier, that is, it may indicate that the second terminal device accepts all the services requested by the first terminal device.

In a possible implementation, the request response message may include the information of the destination identifier and the information of the received at least one service identifier, that is, the unicast request response message may include the identification information of the second terminal device and the second terminal device accepts it. The information of the business identification.

It should be understood that, in this application, the information of at least one service identifier accepted by the second terminal device may be at least one service allowed by the second terminal device, or at least one service supported by the second terminal device, or, It is at least one service agreed by the second terminal device.

In a possible implementation, the request response message may include information about the destination identifier, information about at least one service identifier accepted, and information about at least one service identifier rejected, that is, the unicast request response message may include the second terminal The identification information of the device, the information of the service identification accepted by the second terminal device, and the information of the service identification rejected by the second terminal device.

In the embodiment of the present application, specific implementation methods for sending the first data, the information of the destination identifier, and the information of the target service identifier include but are not limited to the following methods:

Manner 1: The medium access control MAC protocol data unit of the first data includes the information indicating the target identifier and the information of the target service identifier.

Manner 2: The medium access control MAC protocol data unit of the first data includes information indicating the target service identifier, and the information of the target identifier is used to scramble at the physical layer when the first data is sent.

Manner 3: The MAC protocol data unit of the first data includes the information indicating the target service identifier and the first information, and the second information is used to scramble at the physical layer when the first data is sent, where the first information and The second information is used to identify the purpose identifier, that is, the first information and the second information can be used to identify the purpose identifier.

In other words, the information of the destination identifier can be divided into two parts: the first information and the second information. The first information is carried in the MAC PDU of the first data, and the second information is used for scrambling at the physical layer.

Manner 4: The MAC protocol data unit of the first data includes the information indicating the target service identifier and the first information, and the side link control SCI information corresponding to the first data includes the second information, where: The first information and the second information are used to identify the purpose identifier.

For example, the MAC PDU header of the first data may be added with information for filling in the target service identifier in the DST field.

For example, the header of the MAC PDU of the first data may be added with the information of the target service identifier and the information of the target identifier in the DST field.

For example, the header of the MAC PDU of the first data may be added with information for filling in the destination identifier in the DST field, and information for filling in the target service identifier in the service field.

Optionally, in the embodiment of the present application, the media access control MAC protocol data unit of the first data may further include indication information, and the indication information may indicate that the first data is data transmitted by unicast.

In a possible implementation manner, a method 200 of unicast transmission is shown in FIG. 4. The unicast transmission method shown in FIG. 4 can be applied to the centralized scheduling transmission mode, that is, in the Mode1 scenario in NR. The unicast transmission method of FIG. 4 includes:

201. A first terminal device may send a unicast request message to a second terminal device. The unicast request message includes at least one requested service identification information, and the at least one requested service identification information includes the target service identification.

Exemplarily, the first terminal device sends a unicast request message, and the unicast request message may include information about one or more service identifiers requested by the first terminal device. For example, the first terminal device may send a unicast request message by broadcasting, and the unicast request message may also include an identifier allocated by the first terminal device for unicast transmission, which is used by the second terminal device to send to the first terminal device Data; may also include one or more identifiers of the second terminal device at the upper layer or the application layer (APP layer), so that the second terminal device can identify the unicast request message.

202. The second terminal device sends a request response message to the first terminal device, and the request response message may include the destination identifier.

Exemplarily, the second terminal device receives the unicast request message and sends a request response message to the first terminal device according to the accepted service or service type. The request response message may include only the information of the target identifier, or may include the information of the target identifier and the information of the accepted at least one service identifier, or may include the information of the target identifier, the information of the accepted at least one service identifier, and the rejection Information about at least one business identifier of the company.

It should be understood that all service identification information may have been exchanged between the first terminal device and the second terminal device, and the first terminal device and the second terminal device may each maintain a service identification list.

Step 210: The first terminal device sends report information to the network device, where the report information includes information about the destination identifier and information about at least one service identifier, where the at least one service identifier is the service identifier corresponding to the destination identifier .

Exemplarily, the information of at least one service identification included in the reported information may be a list of service identifications.

Optionally, the reported information may further include at least one piece of frequency information, and each piece of frequency information in the at least one piece of frequency information is frequency information corresponding to each piece of the at least one service.

For example, in this application, for services with the same frequency requirements, the network devices can perform the same configuration. That is, the network equipment can configure each service according to the information of the destination identification and the information of at least one service identification, or the network equipment can set the frequency requirements according to the information of the destination identification, the information of at least one service identification, and at least one frequency information. The same business is configured the same.

Step 220: The network device sends configuration information to the first terminal device for unicast communication with the second terminal device.

It should be noted that the first terminal device receives the configuration information sent by the network device, the configuration information may only include the configuration of unicast communication, or the configuration information may include the configuration of unicast communication and the configuration of other services, for example, broadcast The configuration of services or multicast services is not limited in this application.

Optionally, the configuration information may be used to configure a logical channel/logical channel group corresponding to each service in the at least one service. That is, different services can be transmitted through different logical channels/logical channel groups.

Optionally, the configuration information may be used to configure the same logical channel configuration for the service reuse in the service identification list, and the configuration information may include at least one service identification list and a logical channel/logical channel group corresponding to the service identification list , Wherein the list of business identities includes information of at least one business identity.

In the embodiment of the present application, the network device may configure the same logical channel configuration for multiple services, and the multiple services may be services with the same QoS requirements or frequency requirements or overlapping parts, and the network equipment may configure the multiple services. Services reuse the same logical channel configuration, thereby reducing configuration resources.

Optionally, in a possible implementation manner, each service in at least one service may correspond to a set of logical channel configurations. As shown in Figure 5, in the sending terminal device (ie the first terminal device) and the receiving terminal device (ie the second terminal device), the management of the logical channel can be as shown in Figure 5, that is, for the terminal device in the unicast connection The source layer 2ID (source L2ID) can be used to identify the sending end terminal device; the destination layer 2ID (destination L2 ID) can be provided by the receiving end terminal device to identify the receiving end terminal device or to identify the unicast connection ; The service identification information is used to identify the V2X service in the unicast connection.

Exemplarily, each service in at least one service may correspond to a set of logical channel configuration. The logical channel configuration may include a list of logical channel identifiers and logical channel group identifiers corresponding to the logical channel identifiers. One logical channel identifier uniquely identifies the first terminal device A logical channel corresponding to a service between the second terminal device and a logical channel group identifier uniquely identifies a logical channel group corresponding to a service between the first terminal device and the second terminal device. In this way, the data of each service in at least one service between the first terminal device and the second terminal device can be independently managed, and transmitted through different logical channels/logical channel groups, that is, different Business data will be encapsulated in different MAC PDUs for transmission. For example, the configuration information may include at least one service identification information (that is, it may be a service identification list) and the logical channel configuration corresponding to each service identification.

Exemplarily, when each service in at least one service corresponds to a set of logical channel configuration, the specific implementation modes of the configuration information include but are not limited to the following modes:

Manner 1: The configuration information includes the corresponding relationship between the QoS information of each service and the logical channel group.

Exemplarily, each QoS flow corresponds to QoS information (also referred to as QoS parameters), and the QoS information may be 5G quality of service identifier (5G QoS identifier, 5QI) or quality of service flow identifier (QoS flow identifier, QFI) Or a V2X QoS identifier (VQI), or other QoS parameters that can reflect service data reliability, delay, priority, transmission rate, transmission distance, etc.

Manner 2: The configuration information includes the corresponding relationship between the QoS information of each service and the logical channel, and the corresponding relationship between the logical channel and the logical channel group.

Manner 3: The configuration information includes the corresponding relationship between the flow identifier of each service and the logical channel group.

Manner 4: The configuration information includes the correspondence between the flow identifier of each service and the logical channel, and the correspondence between the logical channel and the logical channel group, wherein the flow identifier is a QoS flow identifier in the Internet of Vehicles.

Exemplarily, the configuration information in this application may also include at least one carrier corresponding to the destination identifier, at least one bandwidth part BWP included in each carrier in the at least one carrier, and at least one resource pool included in the at least one BWP; or, configuration information It may also include at least one carrier corresponding to the destination identifier, and at least one service identifier corresponding to each carrier in the at least one carrier.

Exemplarily, the configuration information further includes at least one uplink scheduling request SR configuration corresponding to the destination identifier, and each SR configuration in the at least one SR configuration corresponds to at least one service identifier.

Optionally, in a possible implementation manner, at least one service reuses a set of logical channels, but each service in the at least one service uses a different logical channel or logical channel group. As shown in FIG. 6, in the sending terminal device (ie, the first terminal device) and the receiving terminal device (ie, the second terminal device), the management of logical channels can be as shown in FIG. A maximum of 8 logical channel groups are supported in unicast transmission. At this time, each service can be mapped to one or more logical channel groups, but different services cannot share a logical channel or logical channel group. For example, when at least one service multiplexes a set of logical channels, each service in the at least one service may correspond to a different logical channel, or each service may correspond to a different logical channel group.

It should be noted that, unlike the logical channel management mechanism described in FIG. 5, different services in the logical channel management mechanism in FIG. 6 share a set of logical channels. At this time, in order to ensure that different services can use different frequencies, that is, to meet different service requirements, it is at least required that different services cannot share the same logical channel.

Exemplarily, at least one service reuses the same logical channel configuration, each service in the at least one service corresponds to a different logical channel group, and the configuration information includes an identifier of at least one logical channel group corresponding to each service.

Exemplarily, the configuration information may also include the QoS information of each service and/or the identifier of the logical channel/logical channel group corresponding to the flow identifier.

In the embodiment of the present application, when at least one service multiplexes a set of logical channels, the network device may configure the first terminal device, and the configuration information may include the correspondence between service identification information and the logical channel group, for example, A service ID corresponds to one or more logical channel group IDs. Alternatively, a corresponding resource pool can be configured for each logical channel identifier. Or, multiple logical channel group identifiers may correspond to one or more resource pools. Alternatively, one unicast connection may correspond to one or more resource pools, but the correspondence between logical channel groups and resource pools may not be configured.

It should be noted that when at least one service multiplexes a set of logical channels, the configuration of the network device to the first terminal device may also include service/service type QoS parameters and/or flow identification and bearer mapping configuration, that is, one Or multiple streams are mapped to one bearer. Different services/service types in a unicast connection may have data with the same QoS requirements, that is, data packets of different services/service types may have the same quality of service flow identity (QFI) or 5G service quality identifier (5G QoS identifier, 5QI) or VQI. At this time, when configuring the mapping relationship between the flow and the logical channel, information indicating the service identifier corresponding to the flow is required. That is, the service identification information +QFI/5QI/VQI can be mapped to a logical channel.

Step 230: The first terminal device sends a buffer status report BSR to the network device.

Exemplarily, when each service in at least one service corresponds to a set of logical channels, the BSR may include indication information of the target identifier, indication information of the target service, and indication information of the logical channel group corresponding to the target service. For example, when the first terminal device has data to transmit, it reports the BSR, and the BSR can carry the indication information of the target identifier, the indication information of the target service identifier, and the indication information of the logical channel group. The indication information of the destination identifier may be a destination ID or an index, and the index indicates the position of the destination ID in the destination ID list reported by the first terminal device. The indication information of the target service identifier may be a service ID or an index, and the index indicates the position of the service ID corresponding to the service in the service ID list corresponding to the destination ID reported by the first terminal device. The indication information of the logical channel group may be a logical channel group identifier or an index, where the index indicates the service ID of the destination ID configured by the network device for the first terminal device to which the logical channel group belongs The position in the corresponding logical channel group list.

When the resources for sending the BSR are insufficient, that is, the buffer size information of all services in the unicast connection cannot be reported to the base station in one BSR, the buffer size information corresponding to some logical channel groups can be considered for the next transmission. At this time, different services need to be prioritized. The cache size information of high-priority services is reported first, and the cache size information of low-priority services can be reported next time.

Exemplarily, in this embodiment, the priority of the logical channel or logical channel group with the highest priority in the logical channel or logical channel group to which the data to be transmitted belongs may be used as the priority of the service.

Exemplarily, in this embodiment, one destination identifier corresponds to at least one service, and the priority of the service with the highest priority among the at least one service may be used as the priority of the destination identifier.

Exemplarily, when at least one service multiplexes a set of logical channels, the BSR may include indication information of the target identifier and indication information of the logical channel group corresponding to the target service.

For example, when the first terminal device has data to send, it triggers the BSR. The BSR contains indication information of the destination ID and logical channel group ID. The indication information of the destination ID can be the destination ID or an index. The index indicates the position of the destination ID in the destination ID list reported by the first terminal device. The indication information of the logical channel group may be a logical channel group identifier or an index, where the index indicates the service ID of the destination ID configured by the network device for the first terminal device to which the logical channel group belongs The position in the corresponding logical channel group list.

Step 240: The network device sends scheduling information to the first terminal device. That is, the network device can perform resource scheduling based on the BSR sent by the first terminal device.

Step 250: The first terminal device sends the first data to the second terminal device.

For example, the first terminal device may generate the first data, and the first terminal device sends the first data, the information of the target identifier, and the information of the target service identifier to the second terminal device, where the information of the target identifier is used to identify the second terminal device , The information of the target service identifier is used to identify a vehicle networking V2X service corresponding to the first data, and at least one service identifier corresponding to the target identifier includes the target service identifier.

In this application, when the first terminal device sends the first data to the second terminal device, it may also send the information of the target identifier and the information of the target service identifier. For example, the destination ID can be the destination ID, and the service ID can be the service ID. The destination ID and service ID may be indicated in the MAC PDU header of the first data. It can also indicate the service ID in the MAC PDU header, and use the destination ID for scrambling at the physical layer. The destination ID can also be split into two parts, one part is indicated in the MAC PDU header together with the service ID, and the other part is used for scrambling at the physical layer. In addition, when sending the first data, logical channel identification information or logical channel group identification information may also be carried. Optionally, when sending data, the MAC PDU header may also indicate that the first data is unicast connection data.

Exemplarily, the information of the service identification in this application may also be an index indication of the service identification, that is, the first terminal device may send the first data, the destination ID, and the index indication of the service identification (service index). In the above steps 201 and 202, the first terminal device and the second terminal device may each maintain a service identification list, and the index of the target service identification may indicate the service identification in the service identification list.

Exemplarily, when at least one service reuses the same logical channel configuration, the first terminal device can be connected through the control plane of the unicast connection, for example, through the SRB or the upper layer control plane connection, and will obtain it from the network device The service and the configuration of the logical channel/logical channel group are sent to the second terminal device, that is, the unique service can be identified by the logical channel/logical channel group at this time, and the first terminal device can send the first data, The information of the destination identifier and the logical channel identification information/logical channel group identification information, for example, may indicate the logical channel identification information/logical channel group identification information in the MAC PDU header of the first data.

In a possible implementation manner, the first terminal device and the second terminal device are in a unicast connection, and an SRB can also be established between the two terminal devices. The SRB is used to exchange configurations on the V2X SL between the two terminal devices.

In this embodiment, there may be multiple services sharing a unicast connection between two terminal devices, each service may correspond to a set of logical channels, and SRBs may share one. That is, when the terminal device uses the SRB for configuration interaction, it can only carry the destination ID information, for example, it can only use the destination ID for physical layer scrambling; or the destination ID can be split into two parts, one is used for scrambling at the physical layer, and the other is used for scrambling at the physical layer. It is indicated in the MAC PDU header. The configuration information carries service indication information, which is used to indicate which service in the current unicast connection the configuration is used for. Exemplarily, the indication information of the service may be service ID, service index, or other forms, which is not limited in this embodiment.

Optionally, the medium access control MAC protocol data unit of the first data further includes the identifier of the corresponding logical channel group or the identifier of the logical channel.

The unicast transmission method shown in FIG. 4 is applied to the scenario of centralized scheduling transmission mode Mode1. In the unicast transmission method shown in FIG. 4, the first terminal device needs to request data from the network device when there is data to send. Resources. In another possible implementation manner, the first terminal device may request periodic resources from the network device. As shown in FIG. 7, the unicast transmission method shown in FIG. 7 can be applied to the scenario of the distributed transmission mode Mode2. . The method 300 of unicast transmission in FIG. 7 includes the following steps:

Step 310: The first terminal device may send a unicast request message to the second terminal device. The unicast request message includes information about at least one requested service identifier, and the at least one requested service identifier includes the target service identifier.

Step 320: The second terminal device sends a request response message to the first terminal device, and the request response message may include the destination identifier.

Step 330: The first terminal device sends report information to the network device, where the report information includes information about the destination identifier and information about at least one service identifier, where the at least one service identifier is the service identifier corresponding to the destination identifier .

Step 340: The network device sends configuration information to the first terminal device for unicast communication with the second terminal device.

It should be understood that the specific implementation form of the configuration information is applicable to the possible implementation form of the configuration information described in step 210 in FIG. 4, and will not be repeated here.

Step 350: The first terminal device sends the first data to the second terminal device.

It should be understood that the specific implementation form of the foregoing step 310 to step 350 may be applicable to any one of the possible implementation forms in FIG. 4, and will not be repeated here.

In this application, when the first terminal device sends the first data to the second terminal device, it will also carry destination ID (destination ID) information and target service ID (service ID) information.

Exemplarily, the media access control MAC protocol data unit of the first data may include the information indicating the target identifier and the information of the target service identifier; or, the media access control MAC protocol data unit of the first data may include The information indicating the target service identifier and the information using the destination identifier when sending the first data are scrambled at the physical layer; or, the MAC protocol data unit of the first data may include indicating the The information of the target service identifier and the first information, and the second information is used to scramble at the physical layer when sending the first data, wherein the first information and the second information are used to identify the target identifier; Alternatively, the media access control MAC protocol data unit of the first data may include information indicating the target service identifier and the first information, and the side link control SCI information corresponding to the first data includes the second information, The first information and the second information are used to identify the target identifier.

Optionally, the medium access control MAC protocol data unit of the first data includes indication information, and the indication information indicates that the first data is data transmitted by unicast.

Optionally, the media access control MAC protocol data unit of the first data includes the identifier of the corresponding logical channel group or the identifier of the logical channel.

In a possible implementation, the unicast transmission method of this application can be applied to the distributed transmission mode, namely Mode 2 in NR, that is, the network device can configure a resource for the terminal device, and the terminal device needs to send data when there is data. The terminal device can send data by randomly selecting, based on the listening reservation mechanism, or based on the partial listening reservation mechanism from at least part of the resources acquired from the master-slave resource pool.

In the Mode2 mode of the connected state, the first terminal device can send report information to the network device, and the network device receives the report information sent by the first terminal device to configure the first terminal device and send configuration information to the first terminal device. A terminal device sends the first data, the information of the target identifier, and the information of the target service identifier to the second terminal device according to the configuration information.

In the idle Mode2 mode, the first terminal device can autonomously send data from at least part of the resources acquired from the resource pool in the pre-configuration information, that is, the first terminal device can directly send the first data to the second terminal device, The information of the target identifier and the information of the target business identifier.

In a possible implementation manner, the network device may configure the logical channel group corresponding to the service for the first terminal device in the idle state. For example, the configuration information may be a mapping relationship between QoS parameters/QoS flows, logical channel identifiers, and logical channel group identifiers. Or, it can also be a mapping relationship between QoS parameters/QoS flows and logical channel group identifiers.

For the terminal device in the Mode2 mode or the idle state in the Mode2 mode, the logical channel configuration corresponding to the above-mentioned service may also be obtained through broadcast or pre-configuration. Obtaining in a broadcast mode, that is, the network device broadcasts the configuration information in any one of the possible implementation modes of the mode 1 to the mode 4 in step 220 of FIG. 4 in the broadcast message, and services can be distinguished or not. For example, when distinguishing services, there is a set of corresponding configuration information for each service in the broadcast message; when not distinguishing services, that is, the service information may not be reflected in the broadcast message, and only the configuration information is broadcast. The configuration information is applicable to All business. Obtained in a pre-configured manner, that is, sent by a core network device, such as a V2X control function (CF) to the first terminal device. After obtaining the configuration from the network device or the V2X CF, the first terminal device transmits data according to the configuration.

Regarding the flow identification-related manners, that is, the possible implementation manners of the configuration information in manners 3 and 4 in step 220 of FIG. 4, the access (access stratum, AS) layer inside the UE can also obtain the QoS characteristics corresponding to the flow identification from the upper layer. The upper layer can be a non-access (Non-Access Stratum, NAS) layer, or a protocol layer that can provide QoS characteristics of flow identification. QoS characteristics include data reliability, delay, priority, transmission rate, transmission distance, etc. QoS parameters.

It should be understood that the specific implementation manner of configuring information and sending the first data in Mode 2 mode is also applicable to any of the foregoing possible implementation manners in Mode 1 mode, and details are not described herein again.

Fig. 8 is a schematic interaction diagram of a unicast transmission method according to an embodiment of the present application. Wherein, the unicast transmission method 400 of FIG. 8 can be applied to the network architecture of FIG. 1. Wherein, the unicast transmission method shown in FIG. 8 can be applied to the scenario of V2X service unicast communication, and the unicast transmission method in FIG. 8 includes:

410. The first terminal device may send a first unicast request message to the second terminal device, and the first unicast request message may include first identification information, and the first identification information is used for unicast communication of the first vehicle networking V2X service .

Exemplarily, in this application, the first terminal device may send at least one unicast request message to the second terminal device, that is, the first terminal device may send multiple unicast request messages, and at least one unicast request message includes For the first unicast request message, each unicast request message in the at least one unicast request message corresponds to a V2X service. The first identification information carried in the first unicast request message is allocated by the first terminal device for the first V2X service.

Exemplarily, in this application, the first terminal device may send a unicast request message, that is, the first terminal device sends the first unicast request message, and the first unicast request message includes at least one identification information, namely, the first unicast request message. The broadcast request message may include multiple identification information, at least one identification information includes the first identification information, and each identification information in the at least one identification information corresponds to a V2X service. The first identification information carried in the first unicast request message is allocated by the first terminal device for the first V2X service.

Exemplarily, the identification information allocated by the first terminal device for the V2X service in this embodiment may be the L2ID allocated by the first terminal device for the V2X service.

Optionally, the first unicast request message may include an upper layer or application layer identifier of the second terminal device corresponding to each of the at least one identification information, and the upper layer or application layer identifier may be used to identify the second terminal device. Terminal Equipment.

420. The first terminal device may receive the first unicast request response message sent by the second terminal device, where the first unicast request response message includes second identification information, and the second identification information is used for the order of the first V2X service. Broadcast communication.

In the embodiment of the present application, the first terminal device may receive at least one unicast request response message sent by the second terminal device, and one unicast request response message in the at least one unicast request response message may include at least one second identifier Information, the second identification information is identification information allocated by the second terminal device for the service. Exemplarily, when the second terminal device receives a unicast request message sent by the first terminal device, the second terminal device may send a unicast request response message to the first terminal device, and the unicast request response message may include multiple The second identification information. Alternatively, the second terminal device may receive multiple unicast request messages sent by the first terminal device, and for each unicast request message in the multiple unicast request messages, the second terminal device may feed back one unicast request response message, one The unicast request response message may include a piece of second identification information. The above are examples, and this application does not limit this. Exemplarily, the second terminal device may send one or more unicast request response messages to the first terminal device.

It may be that the second terminal device sends a unicast request response message to the first terminal device, and the unicast request response message may include multiple identification information allocated by the second terminal device, that is, the second terminal device can use a unicast The request response message sends the identification information allocated by the second terminal device for each of the multiple services. Optionally, the sequence of the multiple service identification information allocated by the second terminal device is the same as the multiple service identification information allocated by the first terminal device carried in the unicast request message sent to the second terminal device by the first terminal device The order of the information remains the same. Alternatively, in the unicast request response message, the second terminal device further indicates the identification information allocated by the first terminal device for the V2X service corresponding to the identification information allocated by the second terminal device for the V2X service. Further optionally, the second terminal device may also indicate the identification information of the rejected service in the unicast request response message, and the identification information of the rejected service may be the identification information allocated by the first terminal device for the V2X service.

Alternatively, the second terminal device may send multiple unicast request response messages to the first terminal device, and each unicast request response message in the multiple unicast request response messages includes an identifier assigned by the second terminal device for a service Information, that is, the second terminal device can send multiple identification information allocated by the second terminal device to multiple services through multiple unicast request response messages, that is to say, it can be that one unicast request response message includes the second terminal device allocation The information of a business identity. Optionally, each unicast request response message in the at least one unicast request response message corresponds to a V2X service. Optionally, the unicast request response message may further include the identification information allocated by the first terminal device for the V2X service corresponding to the identification information allocated by the second terminal device for the V2X service.

Exemplarily, the identification information allocated by the second terminal device for the service may be the L2ID allocated by the second terminal device for the service.

In this application, two terminal devices may assign identification information to each service, that is, there may be multiple unicast transmissions between the two terminal devices, and each unicast connection may correspond to one service. This can ensure that different services correspond to different unicast connections, ensure that the second terminal device can identify the V2X service or the V2X service type corresponding to the received data, and implement unicast communication between the two terminal devices for different services/service types.

Exemplarily, data corresponding to services with the same frequency requirements and/or the same QoS requirements may share a unicast connection.

Exemplarily, the network device may configure the first terminal device, and the first terminal device may receive configuration information of the network device. The specific implementation methods of the configuration information include but are not limited to the following methods:

For terminal devices in Mode2 mode or idle state, the logical channel configuration corresponding to the above-mentioned service can also be obtained through broadcast or pre-configuration. Obtaining in a broadcast mode, that is, the network device broadcasts the configuration information in any one of the possible implementation modes of the mode 1 to the mode 4 in step 220 of FIG. 4 in the broadcast message, and services can be distinguished or not. For example, when distinguishing services, there is a set of corresponding configuration information for each service in the broadcast message; when not distinguishing services, that is, the service information may not be reflected in the broadcast message, and only the configuration information is broadcast. The configuration information is applicable to All business. Obtained in a pre-configuration mode, that is, sent by a core network device, such as a V2X control function (CF) to the first terminal device. After obtaining the configuration from the network device or the V2X CF, the first terminal device transmits data according to the configuration.

Regarding the flow identification-related manners, that is, the possible implementation manners of the configuration information in manners 3 and 4 in step 220 in Figure 4, the access stratum (AS) inside the UE can also obtain the QoS characteristics corresponding to the flow identification from the upper layer. The upper layer can be a non-access (Non-Access Stratum, NAS) layer, or a protocol layer that can provide QoS characteristics of flow identification. QoS characteristics include data reliability, delay, priority, transmission rate, transmission distance, etc. QoS parameters.

When the data that the first terminal device has a service needs to be transmitted with the second terminal device in a unicast mode, it is first determined whether a unicast connection has been established for the service, and if so, the unicast connection is used for data transmission. If not, the first terminal device initiates a unicast connection establishment process for the service.

Exemplarily, in the embodiment of the present application, the terminal device can allocate different Layer 2 IDs (L2ID) for unicast transmission of different services, as shown in the logical channel management mechanism in FIG. 9. The sending terminal device can be the first terminal device. The first terminal device can assign an L2ID to a service, and send the L2ID to the second terminal device in the request message. When the second terminal device sends the data of the first service , The L2ID allocated by the first terminal device for the first service is used as the destination ID; the receiving terminal device may be the second terminal device, and the second terminal device may allocate an L2ID for a service, which is used in the request response message. Sent to the first terminal device. When the first terminal device sends the data of the first service, it uses the L2ID allocated by the second terminal device for the first service as the destination ID. The first service can be identified by the L2ID allocated by the first terminal device for the first service and the L2ID allocated by the second terminal device for the first service.

It should be noted that the unicast transmission method shown in FIG. 8 may not depend on the unicast transmission method shown in FIG. 4, that is, the unicast transmission method shown in FIG. The method of unicast transmission shown is coupled and implemented.

It should be understood that the size of the sequence numbers of the foregoing processes does not mean the order of execution. The execution order of the processes should be determined by their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

The foregoing describes in detail the unicast transmission method according to the embodiments of the present application. In the present application, when the first terminal device sends the first data, it carries the information of the destination identifier of the second terminal device and the target service to which the first data belongs. The identification information, so that the second terminal device can determine the service or service type corresponding to the first data, and realize unicast communication between the terminal devices for different services or different service types. It should be understood that the first terminal device, the second terminal device, and the network device in the embodiments of the present application can execute the various methods of the foregoing embodiments of the present application, that is, for the specific working processes of the following various products, please refer to the foregoing method embodiments Corresponding process.

The communication device involved in the present application will be described in detail below with reference to FIGS. 10 to 13.

FIG. 10 is a schematic block diagram of a communication device provided by an embodiment of the present application. As shown in FIG. 10, the communication device 500 may include a transceiving unit 510 and a processing unit 520.

In a possible design, the communication device 500 may correspond to the first terminal device in the above method embodiment, for example, it may be the first terminal device or a chip configured in the first terminal device. The communication device 500 can perform each step performed by the first terminal device in FIG. 3, FIG. 4, or FIG.

The processing unit 520 is configured to generate first data by the first terminal device.

The transceiver unit 510 is configured to send the first data, the information of the target identifier, and the information of the target service identifier to the second terminal device, wherein the information of the target identifier is used to identify the second terminal device, and the The information of the target service identifier is used to identify the vehicle networking V2X service corresponding to the first data, and at least one service identifier corresponding to the target identifier includes the target service identifier.

Optionally, as an embodiment, the medium access control MAC protocol data unit of the first data includes information indicating the target identifier and information about the target service identifier; or,

The medium access control MAC protocol data unit of the first data includes information indicating the target service identifier, and the information of the destination identifier is used to scramble at the physical layer when sending the first data; or,

The medium access control MAC protocol data unit of the first data includes information indicating the target service identifier and first information, and the second information is used to scramble at the physical layer when sending the first data, wherein The first information and the second information are used to identify the target identifier; or,

The medium access control MAC protocol data unit of the first data includes information indicating the target service identifier and first information, and the side link control SCI information corresponding to the first data includes second information, wherein The first information and the second information are used to identify the target identifier.

Optionally, as an embodiment, the media access control MAC protocol data unit of the first data includes an identifier of a logical channel group or an identifier of a logical channel.

Optionally, as an embodiment, the transceiving unit 510 is further configured to send a unicast request message to the second terminal device, where the unicast request message includes at least one requested service identification information, and the at least one requested service identification Including the target service identifier; receiving a request response message sent by the second terminal device, where the request response message includes the target identifier.

Optionally, as an embodiment, the request response message further includes information of at least one service identifier accepted by the second terminal device.

Optionally, as an embodiment, the transceiver unit 510 is further configured to send report information to the network device, where the report information includes information about the destination identifier and information about at least one service identifier, where the at least one service identifier The service identifier corresponding to the target identifier; receiving configuration information sent by the network device for unicast communication with the second terminal device.

Optionally, as an embodiment, the report information further includes at least one piece of frequency information, and each piece of frequency information in the at least one piece of frequency information is frequency information corresponding to each piece of the at least one service.

Optionally, as an embodiment, the configuration information is used to configure a logical channel group corresponding to each service in the at least one service.

Optionally, as an embodiment, the configuration information is used to configure services in the service identification list to reuse the same logical channel configuration, and the configuration information includes the service identification list and the logical channel corresponding to the service identification list Group identification, wherein the service identification list includes at least one service identification.

Optionally, as an embodiment, each service in the at least one service corresponds to a logical channel configuration, and the configuration information includes any one of the following:

The corresponding relationship between the QoS information of each service and the logical channel group; or,

The corresponding relationship between the QoS information of each service and the logical channel, and the corresponding relationship between the logical channel and the logical channel group;

The corresponding relationship between the flow identifier of each service and the logical channel group; or,

The corresponding relationship between the flow identifier of each service and the logical channel, and the corresponding relationship between the logical channel and the logical channel group, wherein the flow identifier is a QoS flow identifier in the Internet of Vehicles.

Optionally, as an embodiment, the configuration information further includes: at least one carrier corresponding to the destination identifier, at least one bandwidth part BWP included in each carrier in the at least one carrier, and the at least one BWP included At least one resource pool; or,

At least one carrier corresponding to the destination identifier, and at least one service identifier corresponding to each carrier in the at least one carrier.

Optionally, as an embodiment, the configuration information includes at least one uplink scheduling request SR configuration corresponding to the destination identifier, and each SR configuration in the at least one SR configuration corresponds to at least one service identifier.

Optionally, as an embodiment, the transceiver unit 510 is further configured to send a buffer status report BSR to the network device, where the BSR includes the indication information of the target identifier, the indication information of the target service, and the target service The indication information of the corresponding logical channel group.

Optionally, as an embodiment, the transceiver unit 510 is further configured to send an uplink scheduling request to the network device, where the row scheduling request includes information about the destination identifier and at least one service identifier corresponding to the destination identifier Information.

Optionally, as an embodiment, the at least one service reuses the same logical channel configuration, each service in the at least one service corresponds to a different logical channel group, and the configuration information includes the configuration information corresponding to each service. The identification of at least one logical channel group.

Optionally, as an embodiment, the configuration information further includes information of at least one resource pool corresponding to each logical channel group in the at least one logical channel group.

Optionally, as an embodiment, the configuration information further includes the QoS information of each service and/or the identifier of the logical channel group corresponding to the flow identifier.

Optionally, as an embodiment, the transceiver unit 510 is further configured to send a buffer status report BSR to the network device, where the BSR includes the indication information of the target identifier and the indication information of the logical channel group corresponding to the target service .

In a possible design, the communication device 500 may correspond to the first terminal device in the above method embodiment, for example, it may be the first terminal device or a chip configured in the first terminal device. The communication device 500 can perform each step performed by the first terminal device in FIG. 8. Wherein, the transceiving unit 510 may include a receiving unit and a sending unit.

The sending unit is configured to send a first unicast request message to a second terminal device, where the first unicast request message includes first identification information, and the first identification information is used for the V2X service of the first Internet of Vehicles Unicast communication.

The receiving unit is configured to receive a first unicast request response message sent by the second terminal device, wherein the first unicast request response message includes second identification information, and the second identification information is used for the Unicast communication of the first V2X service.

Optionally, as an embodiment, the sending unit is specifically configured to: send at least one unicast request message to the second terminal device, where the at least one unicast request message includes the first unicast request message, and the Each unicast request message in the at least one unicast request message corresponds to a V2X service.

Optionally, as an embodiment, the first unicast request message includes at least one piece of identification information, the at least one piece of identification information includes the first identification information, and each piece of identification information in the at least one piece of identification information Corresponds to a V2X service.

It should be noted that the foregoing transceiver unit may include a sending unit and a receiving unit, and may be the same transceiver unit, and the communication device 500 may include other units in addition to the foregoing transceiver, which is not limited in this application.

In a possible design, the communication device 500 may correspond to the second terminal device in the above method embodiment, for example, it may be the second terminal device or a chip configured in the second terminal device. The communication device 500 can perform each step performed by the second terminal device in FIG. 3, FIG. 4, or FIG.

The transceiver unit 510 is configured to receive the first data, the information of the target identifier, and the information of the target service identifier sent by the first terminal device.

The processing unit 520 is configured to determine the target service corresponding to the first data according to the information of the first data and the target service identifier, wherein the information of the target identifier is used to identify the second terminal device The information of the target service identifier is used to identify a vehicle networking V2X service, and at least one service identifier corresponding to the target identifier includes the target service identifier.

Optionally, as an embodiment, the medium access control MAC protocol data unit of the first data includes the information of the target identifier and the information of the target service identifier; or,

The medium access control MAC protocol data unit of the first data includes the information of the target service identifier, and the information of the destination identifier is used to scramble at the physical layer when sending the first data; or,

The medium access control MAC protocol data unit of the first data includes the information of the target service identifier and the first information, and the second information is used to scramble at the physical layer when the first data is sent, wherein the The first information and the second information are used to identify the destination identifier; or,

The media access control MAC protocol data unit of the first data includes the target service identifier information and the first information, and the side link control SCI information corresponding to the first data includes the second information, wherein The first information and the second information are used to identify the target identifier.

Optionally, as an embodiment, the media access control MAC protocol data unit of the first data includes indication information, and the indication information indicates that the first data is data transmitted by unicast.

Optionally, as an embodiment, the transceiver unit 510 is further configured to receive a unicast request message sent by the first terminal device, where the unicast request message includes at least one information requesting a service identifier, and the at least one The requested service identifier includes the target service identifier; the sent request response message includes the target identifier.

In a possible design, the communication device 500 may correspond to the second terminal device in the above method embodiment, for example, it may be the second terminal device or a chip configured in the second terminal device. The communication device 500 can perform each step performed by the second terminal device in FIG. 8. The transceiving unit 510 may include a receiving unit and a processing unit.

The receiving unit is configured to receive a first unicast request message sent by a first terminal device, wherein the first unicast request message includes first identification information, and the first identification information is used for the first vehicle networking V2X service Unicast communication.

The sending unit is configured to send a first unicast request response message to the first terminal device, where the first unicast request response message includes second identification information, and the second identification information is used for the first V2X Unicast communication of business.

Optionally, as an embodiment, the receiving unit is specifically configured to: receive at least one unicast request message sent by the first terminal device, where the at least one unicast request message includes the first unicast request message Each unicast request message in the at least one unicast request message corresponds to a type of V2X service.

It should be understood that the communication device 500 according to the embodiment of the present application may correspond to the method of the first terminal device or the second terminal device in the foregoing method embodiment, and the foregoing and other management operations and/or the various units/modules in the communication device 500 The or functions are respectively to implement the corresponding steps of the method of the first terminal device or the second terminal device in the foregoing method embodiment, and therefore, the beneficial effects in the foregoing method embodiment can also be achieved. For brevity, details are not described here.

It should also be understood that each unit/module in the communication device 500 may be implemented in the form of software and/or hardware, which is not specifically limited. In other words, the communication device 500 is presented in the form of functional modules. The "unit" here may refer to an application-specific integrated circuit ASIC, a circuit, a processor and memory that executes one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the aforementioned functions.

The communication device 500 of the above solution may have the function of implementing the corresponding steps of the first terminal device or the second terminal device in the above method; the function may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the transmitting unit can be replaced by a transmitter, the receiving unit can be replaced by a receiver, and other units, such as a determining unit, can be replaced by a processor and executed respectively. Transceiving operations and related processing operations in each method embodiment.

In the embodiment of the present application, the communication device in FIG. 10 may also be a chip or a chip system, for example, a system on chip (system on chip, SoC). Correspondingly, the receiving unit and the sending unit may be the transceiver circuit of the chip, which is not limited here.

FIG. 11 is a schematic block diagram of a communication device provided by an embodiment of the present application. As shown in FIG. 11, for example, the communication device 600 may include a sending unit 610 and a receiving unit 620. The communication device 600 may correspond to the network device in the above method embodiment, for example, it may be a network device, or a chip configured in the network device. The communication device 600 can perform various steps performed by the network device in FIG. 4 or FIG. 7.

The receiving unit 620 is configured to receive report information sent by the first device, where the report information includes information about a destination identifier and information about at least one service identifier, where the at least one service identifier is a service identifier corresponding to the destination identifier, Each service identifier in the at least one service identifier corresponds to a vehicle networking V2X service, and the target identifier is used to identify a second terminal device that unicasts with the first terminal device.

The sending unit 610 is configured to send configuration information to the first terminal device for unicast communication with the second terminal device.

Optionally, as an embodiment, the report information further includes at least one piece of frequency information, and each piece of frequency information in the at least one piece of frequency information is frequency information corresponding to each piece of the at least one service. Optionally, as an embodiment, the configuration information is used to configure a logical channel group corresponding to each service in the at least one service.

Optionally, as an embodiment, each service in the at least one service corresponds to a logical channel configuration, and the configuration information includes any one of the following: the quality of service QoS information of each service and the logical channel group Correspondence; or, the correspondence between the quality of service QoS information of each service and the logical channel, and the correspondence between the logical channel and the logical channel group; the correspondence between the flow identifier of each service and the logical channel group Or, the corresponding relationship between the flow identifier of each service and the logical channel, and the corresponding relationship between the logical channel and the logical channel group, wherein the flow identifier is a QoS flow identifier in the Internet of Vehicles.

Optionally, the receiving unit 620 is further configured to receive a buffer status report BSR sent by the first terminal device, where the BSR includes the indication information of the target identifier, the indication information of the target service, and the target service The indication information of the corresponding logical channel group.

Optionally, as an embodiment, the receiving unit 620 is further configured to receive an uplink scheduling request sent by the first terminal device, where the row scheduling request includes information about the destination identifier corresponding to the destination identifier Information about at least one business identifier of the company.

Optionally, as an embodiment, the receiving unit 620 is further configured to receive a buffer status report BSR sent by the first terminal device, where the BSR includes the indication information of the target identifier and the logic corresponding to the target service The indication information of the channel group.

It should be noted that the sending unit 610 and the receiving unit 620 may be the same transceiver unit, and the communication device 600 may include other units in addition to the sending unit 610 and the receiving unit 620, which is not limited in this application.

It should also be understood that each unit/module in the communication device 600 can be implemented in the form of software and/or hardware, which is not specifically limited. In other words, the communication device 600 is presented in the form of functional modules. The "unit" here may refer to an application-specific integrated circuit ASIC, a circuit, a processor and memory that executes one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the aforementioned functions.

The communication device 600 of the above solution has the function of implementing the corresponding steps performed by the network device in the above method; the function can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the transmitting unit can be replaced by a transmitter, the receiving unit can be replaced by a receiver, and other units, such as a determining unit, can be replaced by a processor and executed respectively. Transceiving operations and related processing operations in each method embodiment.

In the embodiment of the present application, the communication device in FIG. 11 may also be a chip or a chip system, such as a system on chip (system on chip, SoC). Correspondingly, the receiving unit and the sending unit may be the transceiver circuit of the chip, which is not limited here.

FIG. 12 is a schematic structural diagram of a communication device 800 provided by an embodiment of the present application. Exemplarily, the communication apparatus 800 may be a terminal device, for example, a first terminal device or a second terminal device, which is applied to the system as shown in FIG. 1, and executes the first terminal device or the second terminal device in the foregoing method embodiment. The function of the device.

As shown in the figure, the terminal device 800 includes a processor 810 and a transceiver 820. Optionally, the terminal device 800 may further include a memory 830. Among them, the processor 810, the transceiver 802, and the memory 830 can communicate with each other through an internal connection path to transfer control and/or data signals. The memory 2030 is used for storing computer programs, and the processor 810 is used for downloading the Call and run the computer program to control the transceiver 820 to send and receive signals. Optionally, the terminal device 800 may further include an antenna 840 for transmitting the uplink data or uplink control signaling output by the transceiver 820 through a wireless signal.

The foregoing processor 810 and the memory 830 may be combined into a processing device, and the processor 810 is configured to execute the program code stored in the memory 830 to implement the foregoing functions. During specific implementation, the memory 830 may also be integrated in the processor 810 or independent of the processor 810. The processor 810 may correspond to a processing unit of the communication device 500.

The aforementioned transceiver 820 may correspond to the transceiver unit 510 in FIG. 10 or the receiving unit 620 and the sending unit 610 in FIG. 11, and may also be referred to as a communication unit. The transceiver 820 may include a receiver (or a receiver, a receiving circuit) and a transmitter (or a transmitter, a transmitting circuit). Among them, the receiver is used to receive signals, and the transmitter is used to transmit signals.

It should be understood that the terminal device 800 shown in FIG. 12 can implement various processes involving the first terminal device or the second terminal device in the method embodiments shown in FIGS. 3, 6 and 7. The operations and/or functions of each module in the terminal device 800 are respectively for implementing the corresponding processes in the foregoing method embodiments. For details, please refer to the descriptions in the foregoing method embodiments. To avoid repetition, detailed descriptions are appropriately omitted here.

The above-mentioned processor 810 can be used to execute the actions implemented by the first terminal device or the second terminal device described in the previous method embodiments, and the transceiver 820 can be used to execute the first terminal device to the first terminal device described in the previous method embodiments. An action sent or received by a network device. For details, please refer to the description in the previous method embodiment, which will not be repeated here.

Optionally, the aforementioned terminal device 800 may further include a power supply 850 for providing power to various devices or circuits in the terminal device.

In addition, in order to make the function of the terminal device more complete, the terminal device 800 may also include one or more of the input unit 860, the display unit 870, the audio circuit 880, the camera 890, and the sensor 801. The audio circuit It may also include a speaker 882, a microphone 884, and so on.

It should be noted that the communication device 800 may also be the second terminal device in any of the foregoing method embodiments to implement the steps or functions of the second terminal device in any of the foregoing implementation manners.

FIG. 13 is a schematic structural diagram of a communication device 900 provided in an embodiment of the present application, which may be, for example, a schematic structural diagram of a network device. The network device 900 can be applied to the system shown in FIG. 1 to perform the functions of the network device in the foregoing method embodiment.

As shown in the figure, for example, the network device 900 may include one or more radio frequency units, such as a remote radio unit (RRU) 910 and one or more baseband units (BBU) (also It can be called a digital unit, DU920. The RRU 910 may be referred to as a communication unit or a transceiver unit, and corresponds to the sending unit 610 and the receiving unit 620 in FIG. 9. Optionally, the transceiver unit 910 may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 911 and a radio frequency unit 912.

Optionally, the transceiver unit 910 may include a receiving unit and a transmitting unit. The receiving unit may correspond to a receiver (or called a receiver, a receiving circuit), and the transmitting unit may correspond to a transmitter (or called a transmitter, a transmitting circuit), and For example, the transceiver unit 910 can be implemented by the same module, for example, by a transceiver circuit module. The RRU 910 part is mainly used for sending and receiving of radio frequency signals and conversion of radio frequency signals and baseband signals, for example, for sending first information to a terminal device. The part 920 of the BBU is mainly used for baseband processing, control of network equipment, and so on. The RRU 910 and the BBU 920 may be physically set together, or may be physically separated, that is, a distributed base station.

The BBU 920 may be the control part of the network equipment, or may be called the processing unit, which may correspond to the processing unit included in the communication device 600, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. and many more. For example, the BBU (processing unit) may be used to control the base station to execute the operation procedure of the network device in the foregoing method embodiment, for example, to send the foregoing configuration information.

In an example, the BBU 920 may be composed of one or more single boards, and multiple single boards may jointly support a wireless access network (such as an LTE network) of a single access mode, or may respectively support wireless access networks of different access modes. Access network (such as LTE network, 5G network or other networks). The BBU 920 further includes a memory 921 and a processor 922. The memory 921 is used to store necessary instructions and data. The processor 922 is configured to control the network device to perform necessary actions, for example, to control the network to execute the operation flow of the network device in the foregoing method embodiment. The memory 921 and the processor 922 may serve one or more boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.

It should be understood that the network device 900 shown in FIG. 13 can implement various processes involving the network device in the method embodiments of FIGS. 5 and 7. The operations and/or functions of each module in the network device 900 are respectively for implementing the corresponding processes in the foregoing method embodiments. For details, please refer to the descriptions in the foregoing method embodiments. To avoid repetition, detailed descriptions are appropriately omitted here.

The above-mentioned BBU 920 can be used to perform the actions described in the previous method embodiments implemented by the network device, and the RRU 910 can be used to perform the actions described in the previous method embodiments that the network device sends to or receives from the terminal device. For details, please refer to the description in the previous method embodiment, which will not be repeated here.

An embodiment of the present application also provides a processing device, including a processor and an interface; the processor is configured to execute the method in any of the foregoing method embodiments.

It should be understood that the foregoing processing device may be a chip. For example, the processing device may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC), or It is a central processor unit (CPU), it can also be a network processor (NP), it can also be a digital signal processing circuit (digital signal processor, DSP), or it can be a microcontroller (microcontroller unit). , MCU), it can also be a programmable logic device (PLD) or other integrated chips.

In the implementation process, the steps of the above method can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components . The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as being executed and completed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

According to the method provided in the embodiment of the present application, the present application also provides a computer program product, the computer program product includes: computer program code, when the computer program code runs on a computer, the computer executes the embodiment shown in FIG. 3 Transmission method.

According to the method provided in the embodiment of the present application, the present application also provides a computer-readable medium storing program code, which when the program code runs on a computer, causes the computer to execute the embodiment shown in FIG. 3 Methods.

According to the method provided in the embodiments of the present application, the present application also provides a system, which includes the aforementioned one or more terminal devices and one or more network devices.

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

The network equipment in the above-mentioned device embodiments completely corresponds to the network equipment or terminal equipment in the terminal equipment and method embodiments, and the corresponding modules or units execute the corresponding steps. For example, the communication unit (transceiver) performs the receiving or In the sending step, other steps except sending and receiving can be executed by the processing unit (processor). For the functions of specific units, refer to the corresponding method embodiments. There may be one or more processors.

In this application, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are in an "or" relationship. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a). For example, at least one item (a) of a, b, or c can represent: a, b, c, a-b, a-c, b-c or a-b-c, where a, b, and c can be single or multiple.

A person of ordinary skill in the art may be aware that, in combination with the method steps and units described in the embodiments disclosed herein, they can be implemented by electronic hardware, computer software, or a combination of the two, in order to clearly illustrate the possibilities of hardware and software. Interchangeability, in the above description, the steps and components of each embodiment have been generally described in terms of function. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Those of ordinary skill in the art can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of this application.

The terms "component", "module", "system", etc. used in this specification are used to denote computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, the component may be, but is not limited to, a process, a processor, an object, an executable file, an execution thread, a program, and/or a computer running on a processor. Through the illustration, both the application running on the computing device and the computing device can be components. One or more components may reside in processes and/or threads of execution, and components may be located on one computer and/or distributed between two or more computers. In addition, these components can be executed from various computer readable media having various data structures stored thereon. The component may be based on, for example, a signal having one or more data packets (such as data from two components interacting with another component in a local system, a distributed system, and/or a network, such as the Internet that interacts with other systems through signals) Communicate through local and/or remote processes.

Those of ordinary skill in the art may realize that the various illustrative logical blocks and steps described in the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. achieve. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application. Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

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

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

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A method for unicast transmission, characterized in that it includes:

The first terminal device generates first data;

Sending, by the first terminal device, the first data, the information of the target identifier, and the information of the target service identifier to the second terminal device,

Wherein, the information of the target identifier is used to identify the second terminal device, the information of the target service identifier is used to identify the car networking V2X service corresponding to the first data, and at least one service identifier corresponding to the target identifier Including the target service identifier.
The method according to claim 1, wherein the medium access control MAC protocol data unit of the first data includes the information of the target identifier and the information of the target service identifier; or,

The medium access control MAC protocol data unit of the first data includes the information of the target service identifier, and the information of the destination identifier is used to scramble at the physical layer when sending the first data; or,

The medium access control MAC protocol data unit of the first data includes the information of the target service identifier and the first information, and the second information is used to scramble at the physical layer when the first data is sent, wherein the The first information and the second information are used to identify the destination identifier; or,

The medium access control MAC protocol data unit of the first data includes the target service identifier information and first information, and the side link control SCI information corresponding to the first data includes second information, where: The first information and the second information are used to identify the target identifier.
The method according to claim 1 or 2, wherein the method further comprises:

Sending, by the first terminal device, a unicast request message to the second terminal device, the unicast request message including at least one requested service identifier information, and the at least one requested service identifier includes the target service identifier;

The first terminal device receives a request response message sent by the second terminal device, and the request response message includes the destination identifier.
The method according to any one of claims 1 to 3, wherein the method further comprises:

The first terminal device sends report information to the network device, where the report information includes information about the destination identifier and information about at least one service identifier, where the at least one service identifier is a service identifier corresponding to the destination identifier;

The first terminal device receives the configuration information sent by the network device, and is used for unicast communication with the second terminal device.
The method according to claim 4, wherein each of the at least one service corresponds to a logical channel configuration, and the configuration information includes any one of the following:

The corresponding relationship between the QoS information of each service and the logical channel group; or,

The corresponding relationship between the QoS information of each service and the logical channel, and the corresponding relationship between the logical channel and the logical channel group;

The corresponding relationship between the flow identifier of each service and the logical channel group; or,

The corresponding relationship between the flow identifier of each service and the logical channel, and the corresponding relationship between the logical channel and the logical channel group, wherein the flow identifier is a QoS flow identifier in the Internet of Vehicles.
The method according to claim 4 or 5, wherein the method further comprises:

The first terminal device sends a buffer status report BSR to the network device, where the BSR includes the indication information of the target identifier, the indication information of the target service, and the indication information of the logical channel group corresponding to the target service .
A method for unicast transmission, characterized in that it includes:

The first terminal device sends a first unicast request message to the second terminal device, where the first unicast request message includes first identification information, and the first identification information is used for the order of the first Internet of Vehicles V2X service. Broadcast communication

The first terminal device receives a first unicast request response message sent by the second terminal device, wherein the first unicast request response message includes second identification information, and the second identification information is used for all Describe the unicast communication of the first V2X service.
The method according to claim 7, wherein the sending of the first unicast request message by the first terminal device to the second terminal device comprises:

The first terminal device sends at least one unicast request message to the second terminal device, the at least one unicast request message includes the first unicast request message, and each of the at least one unicast request message One unicast request message corresponds to one V2X service.
The method according to claim 7, wherein the first unicast request message includes at least one piece of identification information, the at least one piece of identification information includes the first identification information, and the at least one piece of identification information Each identification information corresponds to a V2X service.
A method for unicast transmission, characterized in that it includes:

The second terminal device receives the first data, the information of the target identifier, and the information of the target service identifier sent by the first terminal device;

The second terminal device determines the target service corresponding to the first data according to the information of the first data and the target service identifier,

Wherein, the information of the target identifier is used to identify the second terminal device, the information of the target service identifier is used to identify the car networking V2X service corresponding to the first data, and at least one service identifier corresponding to the target identifier Including the target service identifier.
The method according to claim 10, wherein the medium access control MAC protocol data unit of the first data includes the information of the target identifier and the information of the target service identifier; or,

The medium access control MAC protocol data unit of the first data includes the information of the target service identifier, and the information of the destination identifier is used to scramble at the physical layer when sending the first data; or,

The medium access control MAC protocol data unit of the first data includes the information of the target service identifier and the first information, and the second information is used to scramble at the physical layer when the first data is sent, wherein the The first information and the second information are used to identify the destination identifier; or,

The medium access control MAC protocol data unit of the first data includes the target service identifier information and first information, and the side link control SCI information corresponding to the first data includes second information, where: The first information and the second information are used to identify the target identifier.
A method for unicast transmission, characterized in that it includes:

The second terminal device receives the first unicast request message sent by the first terminal device,

Wherein, the first unicast request message includes first identification information, and the first identification information is used for unicast communication of the V2X service of the first car network;

The second terminal device sends a first unicast request response message to the first terminal device, where the first unicast request response message includes second identification information, and the second identification information is used for the Unicast communication of the first V2X service.
The method according to claim 12, wherein the second terminal device receiving the first unicast request message sent by the first terminal device comprises:

The second terminal device receives at least one unicast request message sent by the first terminal device, the at least one unicast request message includes the first unicast request message, and in the at least one unicast request message Each unicast request message corresponds to a V2X service.
The method according to claim 12, wherein the first unicast request message includes at least one piece of identification information, the at least one piece of identification information includes the first identification information, and the at least one piece of identification information Each identification information corresponds to a V2X service.
A communication device, characterized by comprising:

A processing unit for generating first data;

The transceiver unit is configured to send the first data, the information of the target identifier, and the information of the target service identifier to the second terminal device,

Wherein, the information of the target identifier is used to identify the second terminal device, the information of the target service identifier is used to identify the car networking V2X service corresponding to the first data, and at least one service identifier corresponding to the target identifier Including the target service identifier.
The communication device according to claim 15, wherein the medium access control MAC protocol data unit of the first data includes the information of the target identifier and the information of the target service identifier; or,

The medium access control MAC protocol data unit of the first data includes the information of the target service identifier, and the information of the destination identifier is used to scramble at the physical layer when sending the first data; or,

The medium access control MAC protocol data unit of the first data includes the information of the target service identifier and the first information, and the second information is used to scramble at the physical layer when the first data is sent, wherein the The first information and the second information are used to identify the destination identifier; or,

The medium access control MAC protocol data unit of the first data includes the target service identifier information and first information, and the side link control SCI information corresponding to the first data includes second information, where: The first information and the second information are used to identify the target identifier.
The communication device according to claim 15 or 16, wherein the transceiver unit is further configured to:

Sending a unicast request message to the second terminal device, where the unicast request message includes at least one requested service identifier information, and the at least one requested service identifier includes the target service identifier;

Receiving a request response message sent by the second terminal device, where the request response message includes the destination identifier.
The communication device according to any one of claims 15 to 17, wherein the transceiver unit is further configured to:

Sending report information to the network device, where the report information includes information about the destination identifier and information about at least one service identifier, where the at least one service identifier is a service identifier corresponding to the destination identifier;

Receiving the configuration information sent by the network device for unicast communication with the second terminal device.
The communication device according to claim 18, wherein each of the at least one service corresponds to a logical channel configuration, and the configuration information includes any one of the following:

The corresponding relationship between the QoS information of each service and the logical channel group; or,

The corresponding relationship between the QoS information of each service and the logical channel, and the corresponding relationship between the logical channel and the logical channel group;

The corresponding relationship between the flow identifier of each service and the logical channel group; or,

The corresponding relationship between the flow identifier of each service and the logical channel, and the corresponding relationship between the logical channel and the logical channel group, wherein the flow identifier is a QoS flow identifier in the Internet of Vehicles.
The communication device according to claim 18 or 19, wherein the transceiver unit is further configured to:

Send a buffer status report BSR to the network device, where the BSR includes the indication information of the target identifier, the indication information of the target service, and the indication information of the logical channel group corresponding to the target service.
A communication device, characterized by comprising:

The sending unit is configured to send a first unicast request message to a second terminal device, where the first unicast request message includes first identification information, and the first identification information is used for the V2X service of the first Internet of Vehicles Unicast communication;

The receiving unit is configured to receive a first unicast request response message sent by the second terminal device, wherein the first unicast request response message includes second identification information, and the second identification information is used for the Unicast communication of the first V2X service.
The communication device according to claim 21, wherein the sending unit is specifically configured to:

At least one unicast request message is sent to the second terminal device, the at least one unicast request message includes the first unicast request message, and each unicast request message in the at least one unicast request message corresponds to A V2X service.
The communication device according to claim 21, wherein the first unicast request message includes at least one piece of identification information, the at least one piece of identification information includes the first identification information, and the at least one piece of identification information includes Each of the identification information corresponds to a V2X service.
A communication device, characterized by comprising:

The transceiver unit is configured to receive the first data, the information of the target identifier, and the information of the target service identifier sent by the first terminal device;

A processing unit, configured to determine the target service corresponding to the first data according to the information of the first data and the target service identifier,

Wherein, the information of the target identifier is used to identify the second terminal device, the information of the target service identifier is used to identify the car networking V2X service corresponding to the first data, and at least one service identifier corresponding to the target identifier Including the target service identifier.
The communication device according to claim 24, wherein the medium access control MAC protocol data unit of the first data includes the information of the target identifier and the information of the target service identifier; or,

The medium access control MAC protocol data unit of the first data includes the information of the target service identifier, and the information of the destination identifier is used to scramble at the physical layer when sending the first data; or,

The medium access control MAC protocol data unit of the first data includes the information of the target service identifier and the first information, and the second information is used to scramble at the physical layer when the first data is sent, wherein the The first information and the second information are used to identify the destination identifier; or,

The medium access control MAC protocol data unit of the first data includes the target service identifier information and first information, and the side link control SCI information corresponding to the first data includes second information, where: The first information and the second information are used to identify the target identifier.
A communication device, characterized by comprising:

The receiving unit is configured to receive a first unicast request message sent by a first terminal device, wherein the first unicast request message includes first identification information, and the first identification information is used for the first vehicle networking V2X service Unicast communication;

The sending unit is configured to send a first unicast request response message to the first terminal device, wherein the first unicast request response message includes second identification information, and the second identification information is used for the first terminal device. -Unicast communication of V2X service.
The communication device according to claim 26, wherein the receiving unit is specifically configured to:

At least one unicast request message sent by the first terminal device is received, where the at least one unicast request message includes the first unicast request message, and each unicast request message in the at least one unicast request message Corresponds to a V2X service.
The communication device according to claim 26, wherein the first unicast request message includes at least one piece of identification information, the at least one piece of identification information includes the first identification information, and the at least one piece of identification information includes Each of the identification information corresponds to a V2X service.
A communication device, characterized in that, the communication device includes a processor and a transceiver, the transceiver is used for information exchange between the communication device and other communication devices, and the processor executes program instructions to execute The method according to any one of claims 1 to 9 or performs the method according to any one of claims 10 to 14.
A computer-readable storage medium, characterized in that the computer-readable storage medium has instructions for executing the method according to any one of claims 1 to 9 or claims 10 to 14.