WO2020164414A1

WO2020164414A1 - Communication method, apparatus and system

Info

Publication number: WO2020164414A1
Application number: PCT/CN2020/074295
Authority: WO
Inventors: 吴问付; 邢玮俊
Original assignee: 华为技术有限公司
Priority date: 2019-02-13
Filing date: 2020-02-04
Publication date: 2020-08-20
Also published as: CN111565369B; CN111565369A

Abstract

Disclosed are a communication method, apparatus and system, which are used for determining an RAT for sending a message of a V2X application to a receiving end. The method comprises: a sending end acquiring radio access technologies (RAT) corresponding to a first V2X application, and an RAT supported by a receiving end, wherein the sending end supports at least two RATs, and the RATs corresponding to the first V2X application comprise at least two RATs; the sending end determining, according to the RATs supported by the sending end, the RAT supported by the receiving end, and the RATs corresponding to the first V2X application, an RAT for sending a message of the first V2X application to the receiving end; and the sending end using the determined RAT to send the message of the first V2X application to the receiving end.

Description

Communication method, device and system

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910116612.X, and the application name is "a communication method, device and system" on February 13, 2019, the entire content of which is incorporated by reference In this application.

Technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method, device, and system.

Background technique

In the vehicle-to-everything (V2X) communication system, there are many different V2X applications, such as: vehicle-to-vehicle (V2V) application, vehicle-to-person (V2P) application, and vehicle-to-person (V2P) application. Vehicle to network (V2N) applications, vehicle and road infrastructure (V2I) applications, etc. These V2X applications have different qualities of service (QoS). The sender can transmit V2X application messages through the PC5 interface or Uu port according to the QoS requirements of the V2X application. For example, V2V application messages, V2I application messages, V2P application messages can be transmitted through the PC5 port, and V2N application message applications can be transmitted through the Uu port.

Among them, the PC5 port is the interface for direct communication between the terminal and the terminal. When multiple networks with different operating systems coexist, the PC5 port can support multiple radio access technologies (RAT). For example, when the fifth generation (5G) network and the fourth generation (4G) network coexist, the PC5 port can support new radio (NR) technology, and can also support long-term evolution (long-term evolution). term evolution, LTE) technology. In this scenario, when the terminal transmits the V2V application message through the PC5 port, it can use the LTE technology and/or the NR technology as well as the radio access technology (RAT) that it supports.

Since the sending end is not sure about the RATs supported by the surrounding terminals when sending the message of the V2X application to its surrounding terminals, in order to ensure that all the surrounding terminals can receive the message of the V2X application sent by the sending end. In the prior art, the sender uses the LTE technology with a lower priority among the LTE technology and the NR technology to transmit messages for V2X applications. Although this transmission method can ensure that both terminals supporting LTE technology and terminals supporting NR technology receive V2X application messages, for terminals supporting NR technology, if LTE technology is used to transmit V2X application messages to them, The communication performance brought by the NR technology will be sacrificed, resulting in a waste of communication resources.

Summary of the invention

The embodiments of the present application provide a communication method, device, and system to determine a RAT for sending a message of a V2X application to a receiving end.

In order to achieve the foregoing objectives, the following technical solutions are adopted in the embodiments of this application:

In the first aspect, an embodiment of the present application provides a communication method. The method may include: the transmitting end obtains the RAT corresponding to the first V2X application and the RAT supported by the receiving end, and according to the RAT supported by the transmitting end, the RAT supported by the receiving end, and the second A RAT corresponding to the V2X application, determining the RAT used to send the message of the first V2X application to the receiving end, and using the determined RAT to send the message of the first V2X application to the receiving end. The sending end supports at least two RATs, and the RAT corresponding to the first V2X application includes at least two RATs.

Based on the method provided in the first aspect, the sender can determine which RAT to use to send the message of the V2X application to the receiver by combining the RAT supported by itself, the RAT corresponding to the V2X application, and the RAT supported by the peer end, and use the determined RAT to send the message to the receiver Send messages from V2X applications. In this way, when the sender sends a V2X application message to the receiver, in addition to referring to the RAT it supports and the RAT corresponding to the V2X application, the sender can also determine the message used to send the V2X application message based on the RAT supported by the opposite end To ensure that the determined RAT is within the range of RATs supported by all receivers, so as to ensure that all receivers can receive V2X application messages sent by the sender, and avoid sending V2X applications due to the sender using a RAT that is not recognized by the other end The message caused the problem that the opposite end cannot receive the message of the V2X application.

In a possible design, combined with the first aspect, when the RAT supported by the receiving end, the RAT supported by the transmitting end, and the RAT corresponding to the first V2X application have an intersection, and the intersection includes only the first RAT, the determined RAT Is the first RAT; or, when there is an intersection between the RAT supported by the receiving end, the RAT supported by the transmitting end, and the RAT corresponding to the first V2X application, and the intersection includes at least two RATs, the determined RAT has the highest priority in the intersection RAT.

Based on this possible design, when the RAT supported by the transmitting end, the RAT corresponding to the V2X application, and the RAT supported by the receiving end have an intersection, and the intersection includes only one RAT, it means that all the receiving ends only support one RAT. This RAT can be used to send messages for V2X applications, or, when the intersection includes two or more RATs, it means that all receivers can support two or more RATs, and the RAT with a higher priority can be used Send V2X application messages to improve the transmission reliability and transmission quality of V2X application messages.

In a possible design, combining the first aspect or the possible design of the first aspect, the receiving end includes a terminal group, the terminal group includes at least two terminals, and the RAT supported by the receiving end is the RAT supported by all terminals in the terminal group The intersection of RAT.

In a possible design, with reference to the first aspect, the receiving end is a terminal group, the terminal group includes at least two terminals, and the RATs supported by all terminals in the terminal group do not overlap; when the RAT supported by the transmitting end and the first V2X When the application corresponding RAT has an intersection, the intersection includes at least two RATs, and there is a first terminal supporting only the first RAT in the intersection set and a second terminal supporting only the second RAT in the intersection set in the terminal group, it is determined The RAT includes a first RAT and a second RAT.

Based on this possible design, when the receiving end includes a terminal supporting only the first RAT and a terminal supporting only the second RAT, the first RAT and the second RAT can be determined as the RAT used to send the message of the V2X application, so that All terminals that support different RATs in the receiving end can receive V2X application messages.

In a possible design, in combination with the first aspect or the possible design of the first aspect, the sender uses the determined RAT to send the message of the first V2X application to the receiver, including: the sender uses the first RAT and sends the message of the first V2X application to the receiver. A terminal sends the message of the first V2X application, and uses the second RAT to send the message of the first V2X application to the second terminal.

Based on this possible design, the sending end can use the RAT supported by the opposite end to send the message of the V2X application to ensure that the opposite end can receive the message of the V2X application.

In a possible design, in combination with the first aspect or any possible design of the first aspect, the sending end obtains the RAT supported by the receiving end, including: the sending end sends a multicast establishment request to the receiving end, and receiving the multicast setup request from the receiving end The response of the multicast establishment request; wherein, the multicast establishment request is used to request the establishment of a multicast communication group, and the response of the multicast establishment request includes a first indication, and the first indication is used to indicate a RAT supported by the receiving end.

Based on this possible design, the sender can obtain the RAT supported by the receiver from the receiver during the establishment of multicast communication with the receiver.

In a possible design, in combination with one aspect or any possible design of the first aspect, the sender obtains the RAT supported by the receiver, including: the sender listens to the broadcast message of the receiver, and the broadcast message includes the second indication, The second indication is used to indicate the RAT supported by the sending end, and the sending end determines the RAT supported by the receiving end according to the second indication.

Based on this possible design, the receiving end can learn the RAT supported by the receiving end through the indication carried in the broadcast message when the receiving end is in broadcast communication, which is simple and easy.

In a possible design, in combination with the first aspect or any possible design of the first aspect, the sending end obtains the RAT supported by the receiving end, including: the sending end listens to the broadcast message of the receiving end, and the sending end according to the message of the broadcast message Format to determine the RAT supported by the receiving end.

Based on this possible design, the receiving end can learn the RAT supported by the receiving end through the message format of the broadcast message in the case of broadcast communication with the receiving end, without using the information carried in the broadcast message to determine the RAT supported by the receiving end, which is simple and easy .

In a possible design, in combination with one aspect or any possible design of the first aspect, the sending end obtains the RAT corresponding to the first V2X application, including: the sending end receives the correspondence between the V2X application and the RAT from the V2XCF or PCF , And determine the RAT corresponding to the first V2X application according to the corresponding relationship.

Based on this possible design, the receiving end can obtain the correspondence between the V2X application and the RAT from the network side, and determine the RAT corresponding to the first V2X application according to the obtained correspondence.

In the second aspect, the present application provides a communication device, which may be a sending end or a chip or a system on a chip in the sending end, and may also be a module or a module on the sending end for implementing the communication method described in the embodiments of this application. unit. The communication device can realize the functions performed by the sending end in the above-mentioned aspects or various possible designs, and the functions can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the aforementioned functions. For example, the communication device may include an acquiring unit, a determining unit, and a sending unit.

The acquiring unit is configured to acquire the RAT corresponding to the first V2X application and the RAT supported by the receiving end, where the transmitting end supports at least two RATs, and the RAT corresponding to the first V2X application includes at least two RATs;

The determining unit is configured to determine the RAT used to send the message of the first V2X application to the receiving end according to the RAT supported by the sending end, the RAT supported by the receiving end, and the RAT corresponding to the first V2X application;

The sending unit uses the RAT determined by the determining unit to send the message of the first V2X application to the receiving end.

For the specific implementation of the communication device, reference may be made to the behavior and function of the sending end in the communication method provided in the first aspect or any possible design of the first aspect, and details are not repeated here. Therefore, the provided communication device can achieve the same beneficial effects as the first aspect or any possible design of the first aspect.

In a third aspect, a communication device is provided, including: a processor and a memory; the memory is used to store computer execution instructions, and when the communication device is running, the processor executes the computer execution instructions stored in the memory to enable the The communication device executes the communication method described in the foregoing first aspect or any possible design of the first aspect.

In a fourth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores instructions that, when run on a computer, enable the computer to execute the first aspect or any of the above aspects. Design the described communication method.

In a fifth aspect, a computer program product containing instructions is provided. The computer program product may include program instructions. When the computer program product runs on a computer, the computer can execute the first aspect or any one of the foregoing aspects. Possible design of the communication method described.

In a sixth aspect, a chip system is provided. The chip system includes a processor and a communication interface. The chip system can be used to implement the functions performed by the sending end in the first aspect or any possible design of the first aspect, For example, the processor obtains the RAT corresponding to the first V2X application and the RAT supported by the receiving end, and determines to send the first V2X application to the receiving end according to the RAT supported by the sending end, the RAT supported by the receiving end, and the RAT corresponding to the first V2X application Use the RAT determined by the determining unit to send the first V2X application message to the receiving end through the communication interface. In a possible design, the chip system further includes a memory, and the memory is used to store program instructions and/or data. The chip system can be composed of chips, or can include chips and other discrete devices, without limitation.

Among them, the technical effects brought about by any one of the design methods of the third aspect to the sixth aspect may refer to the technical effects brought about by the above-mentioned first aspect or any possible design of the first aspect, and will not be repeated.

In a seventh aspect, an embodiment of the present application also provides a communication method, the method includes: the RSU obtains the RAT corresponding to the first V2X application, the RAT supported by the transmitting end, and the RAT supported by the receiving end, according to the RAT corresponding to the first V2X application , The RAT supported by the sender and the RAT supported by the receiver, determine the RAT used to send the message of the first V2X application to the receiver, and send a RAT indication to the sender. The RAT indication is used to indicate the determined RAT, where the sender supports The RAT includes at least two RATs, and the RAT corresponding to the first V2X application includes at least two RATs.

Based on the method provided by the seventh aspect, the RSU can determine the RAT used to send the message of the V2X application to the receiving end in combination with the RAT supported by the sender, the RAT corresponding to the V2X application, and the RAT supported by the opposite end, and indicate the determined RAT to the receiving end The receiving end, so that the receiving end uses the determined RAT to send V2X application messages. In this way, in addition to referring to the RAT supported by itself and the RAT corresponding to the V2X application, the RAT that is used to send the message of the V2X application can also be determined according to the RAT supported by the opposite end, so that the determined RAT is supported by all the receiving ends. Within the scope, ensure that all receivers can receive V2X application messages sent by the sender, and avoid that the other end cannot receive V2X application messages due to the sender using an unrecognizable RAT to send the message of the V2X application, and waste of network resources The problem.

In a possible design, with reference to the seventh aspect, when the RAT supported by the receiving end, the RAT supported by the transmitting end, and the RAT corresponding to the first V2X application have an intersection, and the intersection includes only the first RAT, the determined RAT Is the first RAT; or, when there is an intersection between the RAT supported by the receiving end, the RAT supported by the transmitting end, and the RAT corresponding to the first V2X application, and the intersection includes at least two RATs, the determined RAT has the highest priority in the intersection RAT.

In a possible design, combining the seventh aspect or the possible design of the seventh aspect, the receiving end includes a terminal group, the terminal group includes at least two terminals, and the RAT supported by the receiving end is the RAT supported by all terminals in the terminal group The intersection of RAT.

In a possible design, with reference to the seventh aspect, the receiving end is a terminal group, the terminal group includes at least two terminals, and the RATs supported by all terminals in the terminal group do not overlap; when the RAT supported by the transmitting end, the first V2X When there is an intersection of the RATs corresponding to the application, the intersection includes at least two RATs, and there is a first terminal that supports only the first RAT in the intersection and a second terminal that only supports the second RAT in the intersection, the determined RAT includes The first RAT and the second RAT; or, the determined RAT includes the RAT with the highest priority among the first RAT and the second RAT.

Based on this possible design, when the receiving end includes a terminal that only supports the first RAT and a terminal that only supports the second RAT, the first RAT and the second RAT may be determined as the RAT used to send the message of the V2X application; or The RAT with the highest priority among the first RAT and the second RAT is used as the RAT for sending the message of the V2X application, so that all terminals supporting different RATs at the receiving end can receive the message of the V2X application.

In a possible design, in combination with the seventh aspect or any possible design of the seventh aspect, when the determined RAT includes the first RAT, and the RAT with the highest priority is the first RAT, the The method further includes: the RSU receives the message of the first V2X application sent by the sender using the first RAT, forwards the received message of the first V2X application to the first terminal, and uses the first RAT to communicate with the received first V2X application. The message is decoded, the decoded message of the first V2X application is re-encoded using the second RAT, and the re-encoded message of the first V2X application is sent to the second terminal.

Based on this possible design, the sender can use a RAT to send V2X application messages to the RSU. After receiving the message, the RSU can directly forward the received message to the terminal that supports the RAT. For the terminal that does not support the RAT, the RSU Convert the received message to a terminal that does not support the RAT after format conversion. For the sending end, there is no need to use multiple RATs to send V2X application messages, which reduces the complexity of the terminal sending V2X application messages.

In a possible design, in combination with the seventh aspect or any possible design of the seventh aspect, when the determined RAT includes the first RAT and the second RAT, the method further includes: the RSU receiving and transmitting end uses the first The message of the first V2X application sent by the RAT and the message of the first V2X application sent by the sender using the second RAT; the RSU forwards the message of the first V2X application sent by the sender using the first RAT to the first terminal, and the sender The message of the first V2X application sent using the second RAT is forwarded to the second terminal.

Based on this possible design, the sender can use multiple RATs to send V2X application messages to the RSU. After the RSU receives the message, it can directly forward the received message to the corresponding terminal. For the RSU, it only forwards the received message to the receiver. The received V2X application messages reduce the complexity of RSU processing V2X application messages.

In a possible design, in combination with the seventh aspect or any possible design of the seventh aspect, the RSU acquiring the RAT corresponding to the first V2X application includes: the RSU receives a multicast establishment request from the sender, and the multicast establishment request includes The RAT corresponding to the first V2X application, the multicast setup request is used to request the establishment of a multicast communication group; the RSU sends a RAT indication to the sender, including: RSU sends a response to the multicast setup request to the sender, and a response to the multicast setup request Carry RAT indication.

Based on this possible design, the RSU can obtain the RAT corresponding to the V2X application from the receiving end in the process of establishing a multicast communication group, and indicate the determined RAT used to send the message of the V2X application to the sending end, that is, it can use The existing process obtains the RAT corresponding to the V2X application and instructs the RAT of the message of the V2X application to the sender, thereby reducing signaling overhead.

In a possible design, in combination with the seventh aspect or any possible design of the seventh aspect, the RSU obtains the RAT supported by the receiving end, including: the RSU receives the RAT supported by the receiving end from the network side device; or, the RSU receives The registration request from the receiving end, the registration request includes the RAT supported by the receiving end.

Based on this possible design, the RSU can obtain the RAT supported by the receiving end from the network side device, or obtain the RAT supported by the receiving end from the existing registration process, which is simple and easy.

In an eighth aspect, the present application provides a communication device, which may be an RSU or a chip or a system on a chip in the RSU, and may also be a module or unit in the RSU for implementing the communication method described in the embodiments of the present application. The communication device can realize the functions performed by the RSU in the foregoing aspects or various possible designs, and the functions can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the aforementioned functions. For example, the communication device may include an acquiring unit, a determining unit, and a sending unit.

The acquiring unit is used to acquire the radio access technology RAT corresponding to the first V2X application, the RAT supported by the transmitting end, and the RAT supported by the receiving end, where the RAT supported by the transmitting end includes at least two RATs, and the RAT corresponding to the first V2X application RAT includes at least two RATs;

The determining unit is configured to determine the RAT used to send the message of the first V2X application to the receiving end according to the RAT corresponding to the first V2X application, the RAT supported by the transmitting end, and the RAT supported by the receiving end;

The sending unit is used to send a RAT indication to the sending end, and the RAT indication is used to indicate a determined RAT.

For the specific implementation of the communication device, reference may be made to the behavior and function of the RSU in the communication method provided by the seventh aspect or any one of the possible designs of the seventh aspect, which is not repeated here. Therefore, the provided communication device can achieve the same beneficial effects as the seventh aspect or any possible design of the seventh aspect.

In a ninth aspect, a communication device is provided, including: a processor and a memory; the memory is used to store computer execution instructions, and when the communication device is running, the processor executes the computer execution instructions stored in the memory to enable the The communication device executes the communication method described in the seventh aspect or any one of the possible designs of the seventh aspect.

In a tenth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores instructions that, when run on a computer, enable the computer to execute the seventh aspect or any of the above aspects. Design the described communication method.

In an eleventh aspect, a computer program product containing instructions is provided. The computer program product may include program instructions. When the computer program product runs on a computer, the computer can execute the seventh aspect or any of the foregoing aspects. A possible design of the communication method described.

In a twelfth aspect, a chip system is provided. The chip system includes a processor and a communication interface. The chip system can be used to implement the functions performed by the RSU in the seventh aspect or any possible design of the seventh aspect, For example, the processor obtains the radio access technology RAT corresponding to the first V2X application, the RAT supported by the transmitting end, and the RAT supported by the receiving end, according to the RAT corresponding to the first V2X application, the RAT supported by the transmitting end, and the RAT supported by the receiving end , Determine the RAT used to send the message of the first V2X application to the receiving end, and send the RAT indication to the sending end through the communication interface, and the RAT indication is used to indicate the determined RAT. In a possible design, the chip system further includes a memory, and the memory is used to store program instructions and/or data. The chip system can be composed of chips, or can include chips and other discrete devices, without limitation.

Among them, the technical effects brought about by any one of the eighth aspect to the twelfth aspect can refer to the technical effects brought about by any possible design of the seventh aspect or the seventh aspect, and will not be repeated here.

In a thirteenth aspect, an embodiment of the present application also provides a communication method, the method includes: the sending end receives a RAT indication from the RSU, the RAT indication is used to instruct the sending end to send a message of the first V2X application to the receiving end. RAT: The sender uses the RAT to send the message of the first V2X application to the receiver according to the RAT indication.

Based on the method provided in the thirteenth aspect, the sender can receive the RAT indication from the RSU. The RAT indication is used to indicate the RAT used by the sender to send the first V2X application message to the receiver. The sender sends the first V2X application message according to the received RSU indication. A V2X application message does not require the sender to determine the RAT used to send the V2X application message to the receiver by combining the RAT supported by the sender, the RAT corresponding to the V2X application, and the RAT supported by the peer end, which reduces the processing complexity of the sender.

In a possible design, with reference to the thirteenth aspect, the method further includes: the sender sends a multicast establishment request to the RSU, the multicast establishment request is used to request the establishment of a multicast communication group, and the multicast establishment request carries the first A RAT corresponding to the V2X application; the sending end receives the RAT indication from the RSU, including: the sending end receives a response to the multicast setup request from the RSU, and the response to the multicast setup request carries the RAT indication.

Based on this possible design, the sender can send the RAT corresponding to the V2X application to the RSU during the establishment of the multicast communication group, and receive the RAT indication returned by the RSU during the establishment of the multicast communication group. The RAT corresponding to the V2X application and the RAT corresponding to the message indicating the V2X application are sent by using the existing process to reduce the signaling overhead.

In a possible design, in combination with the thirteenth aspect or any possible design of the thirteenth aspect, the method further includes: the sender receives the correspondence between the V2X application and the RAT from the V2XCF or PCF, and according to the correspondence Determine the RAT corresponding to the first V2X application.

In a possible design, in combination with the thirteenth aspect or any possible design of the thirteenth aspect, the method further includes: the sender sends a registration request to the RSU, and the registration request carries the RAT support capability information of the sender.

Based on this possible design, the sender can send the RAT supported by itself to the RSU during the registration process to reduce signaling overhead.

In a fourteenth aspect, the present application provides a communication device. The communication device may be a sending end or a chip or a system on a chip in the sending end, and may also be a module on the sending end for implementing the communication method described in the embodiments of this application. Or unit. The communication device can realize the functions performed by the sending end in the above-mentioned aspects or various possible designs, and the functions can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the aforementioned functions. For example, the communication device may include a receiving unit and a sending unit.

The receiving unit is configured to receive a RAT indication from the RSU, where the RAT indication is used to indicate the RAT used by the sender to send the first V2X application message to the receiver;

The sending unit is configured to use the RAT to send the message of the first V2X application to the receiving end according to the RAT indication.

For the specific implementation of the communication device, reference may be made to the behavior and function of the sending end in the communication method provided by the thirteenth aspect or any possible design of the thirteenth aspect, which will not be repeated here. Therefore, the provided communication device can achieve the same beneficial effects as the thirteenth aspect or any possible design of the thirteenth aspect.

In a fifteenth aspect, a communication device is provided, including: a processor and a memory; the memory is used to store computer-executable instructions, and when the communication device is running, the processor executes the computer-executable instructions stored in the memory to enable The communication device executes the communication method described in the above-mentioned thirteenth aspect or any one of the possible designs of the thirteenth aspect.

In a sixteenth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores instructions that, when run on a computer, enable the computer to execute the thirteenth aspect or any of the foregoing aspects Possible design of the communication method described.

In a seventeenth aspect, a computer program product containing instructions is provided. The computer program product may include program instructions. When the computer program product runs on a computer, the computer can execute the thirteenth aspect or any of the foregoing aspects. One possible design of the communication method described.

In an eighteenth aspect, a chip system is provided. The chip system includes a processor and a communication interface. The chip system can be used to implement the above-mentioned thirteenth aspect or any possible design of the thirteenth aspect. For example, the processor receives the RAT indication from the RSU through the communication interface, and according to the RAT indication, uses the RAT to send the message of the first V2X application to the receiving end. The RAT indication is used to instruct the sending end to send the first V2X application message to the receiving end The RAT used. In a possible design, the chip system further includes a memory, and the memory is used to store program instructions and/or data. The chip system can be composed of chips, or can include chips and other discrete devices, without limitation.

Among them, the technical effects brought by any of the fifteenth to eighteenth aspects can be referred to the technical effects brought about by any of the above-mentioned thirteenth aspects or the thirteenth aspects. Repeat it again.

In a nineteenth aspect, an embodiment of the present application further provides a communication system, the communication system includes the sending end and the receiving end according to any one of the second aspect to the sixth aspect; or, the communication system includes the eighth aspect to The RSU according to any aspect of the twelfth aspect, the transmitting end and the receiving end according to any one of the fourteenth to eighteenth aspects.

Description of the drawings

FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the application;

2 is a schematic diagram of the composition of a communication device 200 according to an embodiment of the application;

FIG. 3 is a flowchart of a communication method provided by an embodiment of this application;

FIG. 4 is a flowchart of another communication method provided by an embodiment of this application;

FIG. 5 is a flowchart of another communication method provided by an embodiment of this application;

FIG. 6 is a flowchart of still another communication method provided by an embodiment of this application;

FIG. 7 is a schematic diagram of the composition of a communication device 70 according to an embodiment of the application;

FIG. 8 is a schematic diagram of the composition of a communication device 80 provided by an embodiment of this application;

FIG. 9 is a schematic diagram of the composition of a communication system provided by an embodiment of this application.

detailed description

The implementation of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings of the specification.

The communication method provided by the embodiments of this application can be used in any communication system that supports V2X communication. The communication system can be a 3rd generation partnership project (3GPP) communication system, for example, a long term evolution (long term evolution). The LTE) system can also be a fifth generation (5th generation, 5G) mobile communication system or a new radio (NR) system, or a non-3GPP communication system, without limitation. The following uses FIG. 1 as an example to describe the method provided in the embodiment of the present application.

Fig. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the application. As shown in Fig. 1, the communication system may include multiple terminals, roadside units (RSU), access network equipment, and core network. And data network (DN). Among them, RAT technology can be used to communicate with each other between the terminals and between the terminal and the RSU. The RAT technology can include LTE technology, NR technology or other technologies, such as NR+ technology. The core network may include but is not limited to access and mobility management function (AMF), V2X control function (V2X control function, V2XCF), policy control function (PCF), session management function ( session management function (SMF), user plane function (UPF), etc. The DN may include a V2X application server (application service, APP service).

Among them, the terminal in Figure 1 can be called user equipment (UE) or terminal equipment (terminal), including but not limited to vehicle-mounted terminals, mobile phones, tablets or computers with wireless transceiver functions, and smart gas stations. , Smart lights, etc. The terminal can support V2X communication, such as receiving or sending V2X application messages. The terminal can communicate with other terminals through broadcast, or directly communicate with other terminals through multicast, or, with the help of RSU, communicate with other terminals through RSU. For example, as shown in Figure 1, terminal 1 can communicate with other terminals through broadcast. The surrounding terminal 5, terminal 6, and terminal 7 broadcast V2X application messages. Terminal 1 can also directly send V2X application messages to a multicast communication group including terminal 2, terminal 3, and terminal 4 through multicast. The message of the V2X application is sent to the RSU, and the RSU forwards it to the multicast communication group including the terminal 2, the terminal 3, and the terminal 4.

Among them, the RSU in FIG. 1 may be a relay device, and the RSU may receive data sent by the terminal through a communication link with the terminal, and forward the received data to other terminals. Wherein, the communication link may be a side link (sidelink) or a PC5 link.

In the communication system shown in Figure 1, when a terminal needs to use a RAT to send a message of a V2X application to other terminals, the terminal can determine according to the RAT corresponding to the V2X application, the RAT it supports, and the RAT supported by other terminals Use the determined RAT to send V2X application messages to other terminals; alternatively, the RSU determines the appropriate RAT based on the RAT corresponding to the V2X application, the RAT supported by the terminal, and the RAT supported by other terminals, and will determine the appropriate RAT. Instruct the terminal to use the RAT determined by the RSU to send V2X application messages. Specifically, the implementation process may refer to the description in the following embodiments corresponding to FIGS. 3 to 6.

It should be noted that FIG. 1 is only an exemplary drawing, the number of devices included in FIG. 1 is not limited, and in addition to the devices shown in FIG. 1, the communication architecture may also include other devices. In addition, the name of each device in FIG. 1 is not limited. In addition to the name shown in FIG. 1, each device can also be named with other names without limitation.

Among them, in specific implementation, each device shown in FIG. 1, such as a terminal, RSU, etc., may have the components shown in FIG. 2. 2 is a schematic diagram of the composition of a communication device 200 provided by an embodiment of the application. The communication device 200 may be a terminal or a chip or a system on a chip in the terminal, or may be an RSU or a chip or a system on a chip in the RSU. As shown in FIG. 2, the communication device may include the communication device 200 including a processor 201, a communication line 202 and a communication interface 203; further, it may also include a memory 204. Among them, the processor 201, the memory 204, and the communication interface 203 may be connected through a communication line 202.

Among them, the processor 201 may be a central processing unit (CPU), a network processor (NP), a digital signal processing (DSP), a microprocessor, or a micro-controller. Device, programmable logic device (PLD) or any combination of them. The processor may also be any other device with processing functions, such as a circuit, a device, or a software module. In an example, the processor 201 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 2.

The communication line 202 may include a path for transmitting information between components included in the communication device.

The communication interface 203 may be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.). The communication interface 203 can be a module, a circuit, a transceiver or any device that can realize communication. The communication interface 203 can support different RATs. For example, the communication interface 203 can support LTE technology and/or NR technology, and the processor 201 can use LTE technology. And/or NR technology, the generated V2X application message is sent out through the communication interface 203.

The memory 204 may include the database shown in FIG. 1, may be a read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and/or instructions, or may be a random access memory ( random access memory, RAM) or other types of dynamic storage devices that can store information and/or instructions, and can also be electrically erasable programmable read-only memory (EEPROM), compact disc (compact disc read-only memory, CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used for carrying Or any other medium that stores desired program codes in the form of instructions or data structures and can be accessed by a computer, and is not limited to this. The memory 204 may exist independently of the processor 201, or may be integrated with the processor 201. The memory 204 may be used to store instructions or program codes that can implement the communication methods provided in the following embodiments of the present application, and the processor 201 may call and execute the instructions or program codes stored in the memory 204 to implement the following embodiments of the present application. Communication method.

In order to improve the processing capability of the communication device 200, as an implementable manner, the communication device 200 may include multiple processors. For example, in addition to the processor 201 in FIG. 2, the communication device 200 may further include a processor 207 and the like. As yet another achievable manner, the communication apparatus 200 may further include an output device 205 and an input device 206. The input device 206 may be a keyboard, a mouse, a microphone, or a joystick, and the output device 205 may be a display screen, a speaker, or other devices.

It should be noted that the communication device 200 may be a general-purpose device or a special-purpose device. For example, the communication device 200 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device with a similar structure in FIG. 2. The embodiment of the present application does not limit the type of the communication device 200. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. In addition, the device structure shown in FIG. 2 does not constitute a limitation on the communication device. In addition to the components shown in FIG. 2, the communication device may include more or less components than those shown in the figure, or combine certain components. , Or different component arrangements.

In the following, in conjunction with the system shown in Figure 1, the sender is any terminal that sends the message of the first V2X application in Figure 1, and the receiver is a terminal group that receives the message of the first V2X application sent by the sender. This terminal group can be one A terminal may also include two or more terminals. The sender supports at least two RATs. The sender can communicate with the receiver by broadcast, or the sender can directly communicate with the receiver by multicast, or the sender With the aid of the RSU, the communication method provided by the embodiment of the present application is described by using the communication between the RSU and the receiving end as an example. Among them, each device mentioned in the following method embodiments may have the component parts shown in FIG. 2 and will not be repeated. In addition, in the following embodiments of the present application, the names of messages exchanged between various network elements or the names of various parameters in the messages are just an example, and other names may also be used in specific implementations, which are not specifically limited in the embodiments of the present application.

Figure 3 is a communication method provided by an embodiment of the application. In the communication method, the sending end can communicate with the receiving end in a broadcast mode, or directly communicate with the receiving end in a multicast mode, without the need to use RSU to communicate with the receiving end. . As shown in Figure 3, the communication method may include:

Step 301: The sending end obtains the RAT corresponding to the first V2X application and the RAT supported by the receiving end.

The first V2X application may be any V2X application, for example, the first V2X application may be a V2V application, a V2P application, a V2N application, a V2I application, or other V2X applications, etc. The RAT corresponding to the first V2X application may include at least two RATs.

Exemplarily, acquiring the RAT corresponding to the first V2X application by the sender may include: the sender receives the correspondence between the V2X application and the RAT from the V2XCF or PCF, and determines the RAT corresponding to the first V2X application according to the correspondence.

Among them, in the correspondence between V2X applications and RATs, RATs corresponding to different V2X applications may be the same or different. For example, assuming that in the correspondence between V2X applications and RATs, the V2N application corresponds to LTE technology and NR technology, and the first V2X application is a V2N application, then the RAT corresponding to the first V2N application includes LTE technology and NR technology.

Take the sending end receiving the correspondence between the V2X application and RAT from the V2XCF as an example. The sending end can send a request message to the V2XCF to request the correspondence between the V2X application and the RAT. After receiving the request message, the V2XCF determines according to the request message The correspondence between the V2X application and the RAT, and the correspondence between the V2X application and the RAT is sent to the sending end. Among them, V2XCF can determine the correspondence between V2X applications and RATs in the following way: V2XCF or PCF obtains the quanlity of service (QoS) requirements of the V2X applications from the V2X application server, and determines the corresponding V2X applications according to the QoS requirements of the V2X applications RAT.

Wherein, the QoS requirement of the V2X application may include one or more of the following information: the transmission delay of the V2X application, the maximum transmission rate, the RAT requirement of the V2X application, and so on. V2XCF can directly interact with the V2X application server to obtain the QoS requirements of the V2X application from the V2X application server, or V2XCF can obtain the QoS requirements of the V2X application from the V2X application server through the network exposure function (NEF), such as: V2X application The server sends the QoS requirements of the V2X application to the NEF. After receiving the QoS requirements of the V2X application, the NEF sends the QoS requirements to the V2XCF.

The RAT supported by the receiving end may refer to the RAT in the intersection of the RATs supported by all the terminals in the terminal group included in the receiving end, and may also refer to the RAT supported by each terminal in the terminal group included in the receiving end. The RAT supported by each terminal in the terminal group may be the same or different. The sending end can obtain the RAT supported by the receiving end in different ways according to its communication mode with the receiving end. In the following, the terminal group included in the receiving end includes one terminal as an example to describe that the transmitting end obtains the RAT supported by the receiving end. When the terminal group included in the receiving end includes more than two terminals, the transmitting end obtains multiple terminals in the terminal group. For the RAT supported by the terminal, refer to the following method.

1. The sender communicates directly with the receiver through multicast:

In an example, the sender obtaining the RAT supported by the receiver may include: the sender sends a multicast establishment request to the receiver, the multicast establishment request is used to request the establishment of a multicast communication group; the sender receives the multicast establishment from the receiver The response to the request. The response to the multicast setup request includes a first indication, which is used to indicate the RAT supported by the receiving end; the sending end determines the RAT supported by the receiving end according to the first indication.

The first indication may also be referred to as first indication information. Exemplarily, the first indication may be the identifier or index number of the RAT supported by the receiving end, and the transmitting end may determine the RAT supported by the receiving end according to the identifier or index number of the RAT supported by the receiving end.

For example, as shown in Figure 1, terminal 1 is the sender, and the multicast communication group including terminal 2, terminal 3, and terminal 4 is the receiver. Terminal 1 can send multicast setup to terminal 2, terminal 3, and terminal 4, respectively. Request, request these terminals to access the multicast communication group. When terminal 2, terminal 3, and terminal 4 determine to join the multicast communication group, terminal 2, terminal 3, and terminal 4 can indicate the RAT they support. The first indication of is carried in the response to the multicast setup request and sent to the terminal 1. After receiving the response to the multicast setup request, the terminal 1 can determine that each terminal in the receiving end supports RAT.

In another example, acquiring the RAT supported by the receiving end by the transmitting end may include: obtaining the RAT supported by the receiving end by the transmitting end from the network side device. For example, the sending end can send a request message to the network side device to request the RAT supported by the receiving end. After receiving the request message, the network side device will include the RAT supported by the sending end in the response to the request message and send it to the sending end. The sender can learn the RAT supported by the receiver from the response of the request message.

Among them, the network side device can be AMF or other network functions (network function, NF). The receiving end can notify the network side device of the RAT it supports during network registration. For example, the receiving end can send the receiving end to the network side device. The RAT support capability information registration request. The RAT support capability information of the receiving end can be used to indicate the RAT supported by the receiving end. After receiving the registration request, the network side device can determine the RAT supported by the receiving end according to the RAT support capability information of the receiving end. After receiving the request message sent by the sending end, the side device notifies the sending end of the RAT supported by the receiving end.

For example, as shown in Figure 1, terminal 2, terminal 3, and terminal 4 can carry their own RAT support capability information in the registration request and send it to AMF so that AMF can determine according to the RAT support capability information of terminal 2, terminal 3, and terminal 4. RAT supported by terminal 2, terminal 3, and terminal 4. When the terminal 1 determines that a message needs to be applied to the multicast communication group V2X including the terminal 2, the terminal 3, and the terminal 4, the terminal 1 can obtain the RAT supported by the terminal 2, the terminal 3, and the terminal 4 from the AMF.

2. The sender communicates with the receiver through broadcast:

In an example, the sending end acquiring the RAT supported by the receiving end may include: the sending end listening to the broadcast message of the receiving end; wherein the broadcast message includes a second indication, the second indication is used to indicate the RAT supported by the sending end, and the sending end according to The second indication is to determine the RAT supported by the receiving end.

The second indication may also be referred to as second indication information. Exemplarily, the second indication may be an identifier or an index number of a RAT supported by the receiving end.

For example, as shown in Figure 1, the terminal 1 is the sending end, and the terminal 1 can perform broadcast communication with its surrounding terminals 5, 6 and 7. Before the terminal 1 communicates with the terminal 5, the terminal 6 and the terminal 7, the terminal 5, The terminal 6 and the terminal 7 can carry the indication information for indicating the RAT they support in the broadcast message and broadcast it. At this time, the terminal 1 listens to the broadcast message of the terminal 5, the terminal 6 and the terminal 7, and according to the indication information carried in the broadcast message Determine the RATs supported by terminal 5, terminal 6, and terminal 7.

In another example, acquiring the RAT supported by the receiver by the sender may include: the sender listens to the broadcast message of the receiver, and determines the RAT supported by the receiver according to the message format of the broadcast message.

The receiving end may use a RAT to send broadcast messages. In the embodiment of the present application, the message formats of broadcast messages sent by different RATs are different.

For example, the message format of a broadcast message sent using LTE technology is format 1, and the message format of a broadcast message sent using NR technology is format 2. When terminal 1 listens to the broadcast message of terminal 5, and the message format of the broadcast message is format 1. Then terminal 1 can determine that terminal 5 supports LTE technology.

Step 302: The sending end determines the RAT used to send the message of the first V2X application to the receiving end according to the RAT supported by the sending end, the RAT supported by the receiving end, and the RAT corresponding to the first V2X application.

Among them, the sending end can support at least two RATs, for example, the sending end can support LTE technology, NR technology, and other RATs. The sender's RAT support capability information can be pre-configured with the sender's RAT support capability information. The sender's RAT support capability information can be used to indicate the RAT supported by the sender. For example, the sender's RAT support capability information can include the identifier or index number of the RAT supported by the sender. Etc., the sender can determine the RAT it supports according to its configured RAT support capability information.

In an example, when there is an intersection between the RAT supported by the receiving end, the RAT supported by the transmitting end, and the RAT corresponding to the first V2X application, and the intersection includes only the first RAT, it is determined to be used to send the first V2X application to the receiving end The RAT of the message is the first RAT; or,

When there is an intersection between the RAT supported by the receiving end, the RAT supported by the transmitting end, and the RAT corresponding to the first V2X application, and the intersection includes at least two RATs, it is determined that the RAT used to send the message of the first V2X application to the receiving end is The RAT with the highest priority in the intersection.

In each embodiment of the present application, the RAT has a priority corresponding to it, and the priority corresponding to different RATs may be the same or different. Exemplarily, the available RAT and the priority corresponding to the RAT may be specified in the 3rd generation partnership project (3rd generation partnership project, 3GPP) protocol version (release), so that the receiving end can learn the priority corresponding to the RAT according to the protocol.

For example, if the sending end is Terminal 1, the receiving end includes Terminal 2, Terminal 3, and Terminal 4 in a multicast communication group, and the first V2X application is a V2N application. If Terminal 1 supports {LTE technology, NR technology, and NR+ Technology}, terminal 2 supports {LTE technology}, terminal 3 supports {LTE technology}, terminal 4 supports {LTE technology}, V2N application corresponds to LTE technology and NR technology, then the RAT supported by the receiving end 1, the RAT supported by the transmitting end, and There is an intersection of RATs corresponding to the V2N application, and the intersection only includes the LTE technology, it is determined that the RAT used to send the message of the V2N application to the receiving end includes the LTE technology. If terminal 1 supports {LTE technology, NR technology and NR+ technology}, terminal 2 supports {LTE technology, NR technology}, terminal 3 supports {LTE technology, NR technology}, and terminal 4 supports {LTE technology, NR technology, NR+ technology} , V2N application corresponds to LTE technology and NR technology, the RAT supported by the receiving end 1, the RAT supported by the transmitting end, and the RAT corresponding to the V2N application have an intersection, and the intersection includes LTE technology and NR technology, because NR technology has a higher priority than LTE Priority of the technology, it can be determined that the RAT used to send the message of the V2N application to the receiving end includes the NR technology.

In another example, the RATs supported by all terminals in the terminal group included in the receiving end do not have an intersection; when the RAT supported by the transmitting end and the RAT corresponding to the first V2X application have an intersection, the intersection includes at least two RATs, and the receiving end When there is a first terminal supporting only the first RAT in the intersection set and a second terminal supporting only the second RAT in the intersection set in the terminal group included in the terminal, it means that there are both terminals supporting the first RAT and the second terminal at the receiving end. The terminal of the second RAT can determine that the RAT used to send the message of the first V2X application to the receiving end includes the first RAT and the second RAT, so that terminals supporting different RATs can all receive the message of the first V2X application.

For example, if the sending end is Terminal 1, the receiving end includes Terminal 2, Terminal 3, and Terminal 4 in a multicast communication group, and the first V2X application is a V2N application. If Terminal 1 supports {LTE technology, NR technology, and NR+ Technology}, V2N application corresponds to LTE technology and NR technology, terminal 2 only supports LTE technology, terminal 3 only supports LTE technology, terminal 4 only supports NR technology, there is an intersection between the RAT supported by the sender and the RAT corresponding to the V2N application {LTE technology, NR technology}, and there are both terminal 2 and terminal 3 supporting the LTE technology included in the intersection, and terminal 4 supporting the NR technology included in the intersection, in order to ensure that each terminal in the receiving terminal receives the V2N application Message, it can be determined that the RAT used to send the message of the V2N application to the receiving end includes LTE technology and NR technology.

It should be noted that, in the embodiment of the present application, if the RAT supported by the sending end does not have an intersection with the RAT corresponding to the first V2X application, or if there is an intersection between the RAT supported by the sending end and the RAT corresponding to the first V2X application , But when the RAT included in the intersection is not supported by any terminal in the terminal group included in the receiving end, it means that the sending end cannot use the message to send the first V2X application to the receiving end, and the process shown in FIG. 3 ends.

Step 303: The sending end uses the RAT determined in step 302 to send the message of the first V2X application to the receiving end.

In an example, if the RAT determined in step 302 includes one RAT, the sender uses the determined RAT to encode the message of the first V2X application, and sends the encoded first V2X application message to all terminals included in the receiver. news.

In another example, if the RAT determined in step 302 includes the first RAT and the second RAT, the sender may use the first RAT to send the first V2X application message to the first terminal that only supports the first RAT, Using the second RAT, the message of the first V2X application is sent to a second terminal that only supports the second RAT.

Specifically, the sending end may use the first RAT to encode the message of the first V2X application, send the encoded message of the first V2X application to the first terminal, use the second RAT to encode the message of the first V2X application, and send the message to the first terminal. The second terminal sends the encoded message of the first V2X application.

For example, as shown in Figure 1, suppose terminal 1 is the sender, terminal 5, terminal 6, and terminal 7 are the receivers, the first V2X application is the V2N application, the RAT supported by the terminal 1 includes LTE technology and NR technology, and the V2N application corresponds to The RAT includes LTE technology and NR technology, terminal 5 supports LTE technology, terminal 6, terminal 7 supports NR technology, then terminal 1 can use LTE technology to send V2N application messages to terminal 5, and use NR technology to terminal 6 and terminal 7. Send messages from V2N applications.

Based on the method shown in Figure 3, the sender can determine which RAT to use to send the message of the V2X application to the receiver according to the RAT it supports, the RAT corresponding to the V2X application, and the RAT supported by the peer end, and use the determined RAT to send the message to the receiver V2X application news. In this way, when the sender sends a V2X application message to the receiver, in addition to referring to the RAT it supports and the RAT corresponding to the V2X application, the sender can also determine the message used to send the V2X application message based on the RAT supported by the opposite end To ensure that the determined RAT is within the range of RATs supported by all receivers, so as to ensure that all receivers can receive V2X application messages sent by the sender, and avoid sending the sender using a RAT that is not recognized by the sender. Sending a message from a V2X application causes the opposite end to fail to receive a message from a V2X application.

In the following, the method shown in FIG. 3 will be described by taking the terminal 1 in FIG. 1 sending V2N application messages to the terminal 2, terminal 3, and terminal 4 in the multicast communication group as an example. Fig. 4 is a communication method provided by an embodiment of the application. As shown in Fig. 4, the method may include:

Step 401: Terminal 1 determines to establish a multicast communication group for the V2N application.

Wherein, step 401 can refer to the prior art. For example, the terminal 1 can determine to establish a multicast communication group for the V2N application according to the QoS requirements of the V2N application, which will not be repeated here.

Step 402: Terminal 1 sends a multicast establishment request to the terminals included in the multicast communication group.

Wherein, the multicast establishment request may be used to request the terminal to join the multicast communication group.

Wherein, the terminal 1 may send a multicast establishment request to the terminal by using a direct link between it and the terminals included in the multicast communication group.

Step 403: The terminal included in the multicast communication group receives the multicast establishment request, and when the terminal determines to join the multicast communication group, it sends a response to the multicast establishment request to the terminal 1.

The response to the multicast establishment request may carry a first indication, and the first indication may be used to indicate a RAT supported by the receiving end.

Step 404: The terminal 1 receives the response to the multicast establishment request sent by the terminal included in the multicast communication group, and obtains the RAT supported by the receiving end from the response to the multicast establishment request.

Step 405: Terminal 1 obtains the correspondence between the V2X application and the RAT from the V2XCF, and determines the RAT corresponding to the V2N application.

It should be noted that step 405 may be executed after step 404, may also be executed before step 401, or may be executed between step 401 to step 404, which is not limited.

Step 406: According to the RAT supported by the receiving end, the RAT supported by the terminal 1, and the RAT supported by the V2N application, the terminal 1 determines the RAT used to send the message of the V2N application to the receiving end.

Wherein, the terminal 1 may obtain the RAT supported by the receiving end according to the response of the multicast establishment request.

Wherein, step 406 can refer to the description of step 302, and will not be repeated.

Step 407: Terminal 1 uses the determined RAT to send a V2N message to each terminal in the multicast communication group.

Wherein, step 405 can refer to the description of step 303, and will not be repeated.

Based on the method shown in Figure 4, the terminal 1 can determine which RAT to use to send V2N application messages to the terminal 2, terminal 3, and terminal 4 according to the RAT it supports, the RAT corresponding to the V2N application, and the RAT supported by the receiving end. The RAT sends V2N application messages to terminal 2, terminal 3, and terminal 4. In this way, when terminal 1 sends V2N application messages to terminal 2, terminal 3, and terminal 4, in addition to referring to the RAT supported by itself and the RAT corresponding to the V2N application, terminal 1 can also determine the sending according to the RAT supported by the opposite terminal The RAT used by the message of the V2N application makes the determined RAT within the range of RATs supported by all terminals 2, terminal 3 and terminal 4, thereby ensuring that all terminals 2, terminal 3 and terminal 4 can receive the V2N sent by terminal 1 The application message avoids the problem that the opposite end cannot receive the V2N application message due to the terminal 1 sending the V2N application message to the opposite end using a RAT that the opposite end cannot recognize.

The method described in FIG. 3 or FIG. 4 only uses direct communication between the sender and the receiver as an example to describe the communication method provided in the embodiment of the present application. In addition to the direct communication between the sender and the receiver, the sender can also use the RSU to communicate with the receiver through the RSU. In the following, in conjunction with the communication system shown in FIG. 1, the communication method provided by the embodiment of the present application will be described by taking the sending end using the RSU to send the message of the first V2X application to the receiving end through the RSU as an example.

FIG. 5 is another communication method provided by an embodiment of this application. In this communication method, the sending end can communicate with the receiving end through the RSU. For example, the terminal 1 in FIG. 1 is the sending end, the terminal 2, the terminal 3, and the terminal 4 are the receiving ends, and the sending end and the receiving end can perform multicast communication through the RSU. As shown in Figure 5, the method may include:

Step 501: The RSU obtains the RAT corresponding to the first V2X application, the RAT supported by the transmitting end, and the RAT supported by the receiving end.

Among them, the RSU may be the RSU in FIG. 1. The RSU acquiring the RAT corresponding to the first V2X application may include:

The sending end obtains the RAT corresponding to the first V2X application, and sends a multicast establishment request to the RSU. The multicast establishment request may carry the RAT corresponding to the first V2X application, and the multicast establishment request may be used to request the establishment of a multicast communication group; The RSU receives the multicast establishment request from the sender, and obtains the RAT corresponding to the first V2X application from the multicast establishment request.

For the manner in which the sending end obtains the RAT corresponding to the first V2X application, reference may be made to the description in step 301, which will not be repeated.

Among them, the sending end and the receiving end are as described above, the RATs supported by the sending end may include at least two RATs, and the RATs supported by the receiving end may refer to the intersection of RATs supported by all terminals in the terminal group included in the receiving end, or the receiving end. The RAT supported by the terminal in the terminal group included in the terminal.

In an example, the RSU may obtain the RAT supported by the sender and the RAT supported by the receiver through the network registration process. Taking the RSU can obtain the RAT supported by the sender through the network registration process as an example, the process may include:

The sender sends a registration request to the RSU. The registration request can carry the sender’s RAT support capability information. The sender’s RAT support capability information can be used to indicate the RAT supported by the sender; after the RSU receives the registration request, it will carry The RAT support capability information of the sender determines the RAT supported by the sender.

The process for the RSU to obtain the RAT supported by the receiving end through the registration process is the same as the process for the RSU to obtain the RAT supported by the sender through the registration process, and will not be repeated.

In another example, the RSU may obtain the RAT supported by the sending end and the RAT supported by the receiving end from the network side device. Taking the RSU obtaining the RAT supported by the sender from the network side device as an example, the RSU can send a request message to the network side device to request the RAT supported by the sender. After receiving the request message, the network side device carries the RAT supported by the sender The response to the request message is sent to the RSU, and the RSU can determine the RAT supported by the sender according to the response to the request message.

Among them, the network side device can be AMF or other NFs, such as V2XCF or PCF. The receiving end and the sending end can notify the network side device of the RAT they support in the network service process. Taking the sending end as an example, the sending end can send a V2X service authorization request to the AMF. The V2X service authorization request can carry the sending end’s RAT support capability information, the sender’s RAT support capability information can be used to indicate the RAT supported by the sender; after the AMF receives the V2X service authorization request, it will notify the RSU of the sender’s RAT support capability information carried in the V2X service authorization request, and the RSU will follow The RAT support capability information of the sender carried in the V2X service authorization request determines the RAT supported by the sender.

Step 502: The RSU determines the RAT used to send the message of the first V2X application to the receiving end according to the RAT corresponding to the first V2X application, the RAT supported by the transmitting end, and the RAT supported by the receiving end.

For step 502, refer to step 302. For example, in an example, when the RAT supported by the receiving end, the RAT supported by the transmitting end, and the RAT corresponding to the first V2X application have an intersection, and the intersection includes only the first In the case of RAT, the RAT used to send the message of the first V2X application to the receiving end is determined to be the first RAT; or, when there is an intersection between the RAT supported by the receiving end, the RAT supported by the transmitting end, and the RAT corresponding to the first V2X application, and When the intersection includes at least two RATs, it is determined that the RAT used to send the message of the first V2X application to the receiving end is the RAT with the highest priority in the intersection.

In another example, the RATs supported by all terminals in the terminal group included in the receiving end do not have an intersection; when the RAT supported by the transmitting end and the RAT corresponding to the first V2X application have an intersection, the intersection includes at least two RATs, and the receiving end When there is a first terminal supporting only the first RAT in the intersection set and a second terminal supporting only the second RAT in the intersection set in the terminal group included in the terminal group, the RAT determined to be used to send the message of the first V2X application to the receiving terminal includes The first RAT and the second RAT, or the RAT determined to be used for sending the message of the first V2X application to the receiving end, includes the RAT with the highest priority among the first RAT and the second RAT.

Step 503: The RSU sends a RAT indication to the sending end, and the RAT indication is used to indicate the RAT determined in step 502.

The RAT indication may include the identification or index number of the RAT determined in step 502.

Exemplarily, sending the RAT indication by the RSU to the sending end may include: the RSU sending a response to the multicast setup request to the sending end, and the response to the multicast setup request carries the RAT indication. In this way, the RSU can use the existing multicast establishment process to notify the sender of the RAT used to send the message of the first V2X application.

It should be noted that, in addition to carrying the RAT indication, the response to the multicast establishment request may also carry other information, such as multicast communication resources, etc., which are not limited.

Step 504: The sending end receives the RAT indication from the RSU, and according to the RAT indication, uses the RAT determined in step 502 to send the message of the first V2X application.

Wherein, the sending end using the RAT determined in step 502 to send the message of the first V2X application may include: the sending end uses the RAT determined in step 502 to send the message of the first V2X application to the RSU, and the RSU will receive the first V2X application message The message is sent to the receiving end. Specifically, the process can be:

If the RAT corresponding to the first V2X application, the RAT supported by the sender, and the RAT supported by the receiver have an intersection, and the intersection includes only the first RAT, the sender can use the first RAT to encode the message of the first V2X application , Send the encoded message of the first V2X application to the RSU; after receiving the message of the first V2X application sent by the sending end, the RSU forwards the received message of the first V2X application to the receiving end.

There is no intersection between the RATs supported by all terminals in the terminal group included in the receiving end, the RATs supported by the transmitting end and the RAT corresponding to the first V2X application have an intersection, and the intersection includes at least two RATs, and there is an intersection in the terminal group included in the receiving end In the case of the first terminal supporting only the first RAT in the intersection and the second terminal supporting only the second RAT in the intersection, if the RATs determined by the RSU are the first RAT and the second RAT, the sender can use the first terminal RAT encodes the message of the first V2X application, sends the encoded message of the first V2X application to the RSU, uses the second RAT to encode the message of the first V2X application, and sends the encoded message of the first V2X application To the RSU, send the encoded message of the first V2X application to the RSU; the RSU forwards the message of the first V2X application sent by the sender using the first RAT to the first terminal, and the first terminal sent by the sender using the second RAT The message of the V2X application is forwarded to the second terminal.

There is no intersection between the RATs supported by all terminals in the terminal group included in the receiving end, the RATs supported by the transmitting end and the RAT corresponding to the first V2X application have an intersection, and the intersection includes at least two RATs, and there is an intersection in the terminal group included in the receiving end In the case where only the first terminal supporting the first RAT in the intersection set and the second terminal supporting only the second RAT in the intersection set, if the RAT determined in step 502 is the first RAT and the second RAT with the highest priority One RAT, the sender can use the first RAT to encode the message of the first V2X application, and send the encoded message of the first V2X application to the RSU, and the RSU receives the first V2X application sent by the sender using the first RAT After the message, the received message of the first V2X application is forwarded to the first terminal, the first RAT is used to decode the received message of the first V2X application, and the second RAT is used to decode the decoded first V2X application. The message is re-encoded, and the re-encoded message of the first V2X application is sent to the second terminal.

For example, as shown in FIG. 1, taking terminal 1 as the sending end, the receiving end is a multicast communication group including terminal 2, terminal 3, and terminal 4, and terminal 1 sends V2N application messages to the multicast communication group as an example. If terminal 2 supports LTE technology, terminal 3 and terminal 4 support NR technology, and the RAT determined by RSU is NR technology, terminal 1 can use NR technology to send V2N application messages to RSU. For terminals 3 and 4 that support NR technology , RSU will use NR technology to forward received V2N application messages to these terminals; for terminal 2 that supports LTE technology, RSU will convert the received NR type V2N application messages to LTE type V2N application messages, and The message of the converted V2N application is forwarded to the terminal 2 using LTE technology.

If terminal 2 supports LTE technology, terminal 3 and terminal 4 support NR technology, and the RAT determined by RSU is NR technology and LTE technology, terminal 1 uses NR technology and LTE technology to send V2N application messages to RSU. For terminals 3 and 4 that support NR technology, RSU will use NR technology to forward received NR-type V2N application messages to these terminals; for terminals that support LTE technology, RSU will use LTE technology to forward received LTE-type messages V2N application message to terminal 2.

If terminal 2, terminal 3 and terminal 4 only support NR technology or LTE technology, RSU informs terminal 1 to use NR technology (all the terminals included in the receiving end are terminals supporting NR technology) or LTE technology (all the terminals included in the receiving end are The terminal supporting the LTE technology) performs multicast communication, the RSU forwards the received message of the NR type V2N application to the terminal supporting the NR technology or the RSU forwards the received message of the LTE type V2N application to the terminal supporting the LTE technology.

Based on the method shown in Figure 5, the RSU can determine which RAT to use to send the message of the V2X application to the receiving end according to the RAT supported by the sender, the RAT corresponding to the V2X application, and the RAT supported by the opposite end, and indicate the determined RAT to the sender So that the sender uses the indicated RAT to send the message of the V2X application to the RSU, and the RSU sends the message of the V2X application to the receiver. In this way, in addition to referring to the RAT supported by the sender and the RAT corresponding to the V2X application, the RAT supported by the peer can also be combined to determine the RAT used to send the message of the V2X application, so that the determined RAT is supported by all receivers. Within the RAT range, it is ensured that all receivers can receive the V2X application messages sent by the sender, avoiding that the receiver cannot receive the messages of the V2X application due to the use of a RAT that the receiver cannot recognize to send V2X application messages to the receiver problem.

The following describes the method shown in FIG. 5 by taking the terminal 1 in FIG. 1 sending V2N application messages to the terminal 2, terminal 3, and terminal 4 in the multicast communication group through the RSU as an example. Fig. 6 is a communication method provided by an embodiment of the application. As shown in Fig. 6, the method may include:

Step 601: The terminal participating in the multicast communication sends a registration request to the RSU.

Among them, in this embodiment of the present application, the terminals participating in multicast communication may include terminal 1, terminal 2, terminal 3, and terminal 4. That is, the terminals participating in multicast communication may include a sending end and a receiving end.

The registration request may carry the RAT support capability information of the terminal, and the RAT support capability information of the terminal may be used to indicate the RAT supported by the terminal.

Step 602: The RSU receives the registration request sent by the terminal participating in the multicast communication, and determines the RAT supported by the terminal participating in the multicast communication according to the RAT support capability information carried in the registration request.

Step 603: Terminal 1 determines to establish a multicast communication group for the V2N application.

Wherein, step 603 can refer to the description of step 401, and will not be repeated.

Step 604: Terminal 1 sends a multicast establishment request to RSU.

The multicast establishment request may be used to request the terminal to join the multicast communication group, and the multicast establishment request may carry the RAT corresponding to the V2N.

Wherein, the process for the terminal 1 to obtain the RAT corresponding to V2N can refer to the above and will not be repeated.

Step 605: The RSU sends a multicast establishment request to the terminals in the multicast communication group.

Step 606: The terminal included in the multicast communication group receives the multicast establishment request, and when the terminal determines to join the multicast communication group, it sends a response to the multicast establishment request to the RSU.

The response to the multicast establishment request may carry a first indication, and the first indication may be used to indicate a RAT supported by the terminal.

Step 607: The RSU determines the RAT used to send the message of the V2N application to the receiving end according to the RAT supported by the receiving end, the RAT supported by the terminal 1, and the RAT supported by the V2N application.

Wherein, step 607 can refer to the description of step 502, and will not be repeated.

Step 608: The RSU sends a RAT indication to the terminal 1.

For the related description of the RAT indication and step 608, please refer to the step 503, which will not be repeated here.

Step 609: Terminal 1 uses the determined RAT to send the message of the first V2X application according to the RAT indication.

Wherein, step 609 can refer to the description of step 504, and will not be repeated.

Based on the method shown in Figure 6, the RSU can determine which RAT to use to send V2N application messages to terminal 2, terminal 3, and terminal 4 according to the RAT supported by terminal 1, the RAT corresponding to the V2N application, and the RAT supported by the receiving end, and The determined RAT is indicated to the terminal 1, so that the terminal 1 uses the determined RAT to send the V2N application message to the terminal 2, the terminal 3, and the terminal 4. In this way, when terminal 1 sends V2N application messages to terminal 2, terminal 3, and terminal 4, in addition to referring to the RAT supported by terminal 1 and the RAT corresponding to the V2N application, RSU can also determine the sending according to the RAT supported by the opposite terminal The RAT used by the message of the V2N application makes the determined RAT within the range of RATs supported by all terminals 2, terminal 3 and terminal 4, thereby ensuring that all terminals 2, terminal 3 and terminal 4 can receive the V2N sent by terminal 1 The application message avoids the problem that the opposite end cannot receive the V2N application message due to the terminal 1 sending the V2N application message to the opposite end using a RAT that the opposite end cannot recognize.

The foregoing mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between various nodes. It can be understood that, in order to implement the above-mentioned functions, each node, such as an access network device and a terminal, includes a hardware structure and/or software module corresponding to each function. Those skilled in the art should easily realize that in combination with the algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware 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.

The embodiments of this application can divide the access network equipment and terminals into functional modules according to the above method examples. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. . The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.

FIG. 7 is a schematic structural diagram of a communication device 70 provided by an embodiment of this application. The communication device involved in this embodiment may be a sending end or a chip or a system on a chip in the sending end. The communication device 70 may be used to perform the function of the sending end in the foregoing method embodiment. As shown in FIG. 7, the communication device 70 may include an acquiring unit 701, a determining unit 702, and a sending unit 703.

In an example, the acquiring unit 701 is configured to acquire the RAT corresponding to the first V2X application and the RAT supported by the receiving end, where the transmitting end supports at least two RATs, and the RAT corresponding to the first V2X application includes at least two RATs; For example, the acquiring unit 701 may be used to support the communication device 70 to perform step 301 and step 404.

The determining unit 702 is configured to determine the RAT used to send the message of the first V2X application to the receiving end according to the RAT supported by the transmitting end, the RAT supported by the receiving end, and the RAT corresponding to the first V2X application; for example, the determining unit 702 may use Step 302 and step 406 are performed on the supporting communication device 70.

The sending unit 703 uses the RAT determined by the determining unit 702 to send the message of the first V2X application to the receiving end. For example, the sending unit 703 may be used to support the communication device 70 to perform step 303 and step 407.

Specifically, in this example, the communication device 70 can perform the actions of the sending end in the method embodiments corresponding to FIGS. 3 to 4, and the implementation principles and technical effects are similar, and will not be repeated here.

In another example, as shown in FIG. 7, the communication device 70 may further include a receiving unit 704, which is configured to receive a RAT indication from a roadside unit RSU, and the RAT indication is used to indicate to the receiving end The radio access technology RAT used to send the message of the first V2X application; for example, the receiving unit 704 may be used to support the communication device 70 to perform steps 504 and 608.

The sending unit 703 is configured to use the RAT to send the message of the first V2X application according to the RAT indication. For example, the sending unit 703 may be used to instruct the communication device 70 to perform step 504 and step 609.

Specifically, in this example, the communication device 70 can execute the actions of the sending end in the method embodiments corresponding to FIG. 5 to FIG. 6, and the implementation principles and technical effects are similar, and will not be repeated here.

As yet another achievable manner, the communication device 70 shown in FIG. 7 may include: a processing module and a communication module. The processing module may integrate the functions of the acquiring unit 701 and the determining unit 702, and the communication module may integrate the functions of the sending unit 703 and the receiving unit 704. The processing module is used to support the communication device 70 to perform steps 301 and 302 and to control and manage the actions of the communication device 70, and the communication module is used to support the communication device 70 to perform steps 303 and 504 and to communicate with other network entities. Further, the communication device 70 shown in FIG. 7 further includes a storage module for storing program codes and data of the communication device 70.

Among them, the processing module may be a processor or a controller. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication module can be a transceiver circuit or a communication interface. The storage module may be a memory. When the processing module is a processor, the communication module is a communication interface, and the storage module is a memory, the communication device 70 shown in FIG. 7 may be the communication device shown in FIG. 2.

FIG. 8 is a schematic structural diagram of a communication device 80 provided by an embodiment of this application. The communication device involved in this embodiment may be an RSU or a chip or a system on a chip in the RSU. The communication device 80 can be used to perform the function of the RSU in the foregoing method embodiment. In an implementation manner, as shown in FIG. 8, the communication device 80 may include an acquiring unit 801, a determining unit 802, and a sending unit 803.

The acquiring unit 801 is configured to acquire the RAT corresponding to the first V2X application, the RAT supported by the transmitting end, and the RAT supported by the receiving end, where the RAT supported by the transmitting end includes at least two RATs, and the RAT corresponding to the first V2X application includes at least Two RATs. For example, the acquiring unit 801 may be used to support the communication device 80 to perform step 501.

The determining unit 802 is configured to determine the RAT used to send the message of the first V2X application to the receiving end according to the RAT corresponding to the first V2X application, the RAT supported by the transmitting end, and the RAT supported by the receiving end; for example, the determining unit 802 may It is used to support the communication device to perform step 502.

The sending unit 803 is configured to send a RAT indication to the sending end, and the RAT indication is used to indicate a determined RAT. For example, the sending unit 803 may be used to support the communication device 80 to perform step 503.

Further, as shown in FIG. 8, the communication device 80 may further include: a receiving unit 804.

The receiving unit 804 is configured to receive a message of the first V2X application sent by the sending end using the first RAT;

The sending unit 803 is further configured to forward the received message of the first V2X application to the first terminal; and, use the first RAT to decode the received message of the first V2X application, and use the second RAT to decode the decoded message The message of the first V2X application is re-encoded, and the re-encoded message of the first V2X application is sent to the second terminal.

Specifically, the communication device 80 provided in the embodiment of the present application can perform the actions of the RSU in the method embodiments corresponding to FIG. 5 to FIG. 6, and its implementation principles and technical effects are similar, and will not be repeated here.

As yet another achievable manner, the communication device 80 shown in FIG. 8 may include: a processing module and a communication module. The processing module can integrate the functions of the acquiring unit 801 and the determining unit 802, and the communication module can integrate the functions of the sending unit 803 and the receiving unit 804. The processing module is used to support the communication device 80 to perform step 501 and step 502 and to control and manage the actions of the communication device 80, and the communication module is used to support the communication device 80 to perform step 503 and communicate with other network entities. Further, the communication device 80 shown in FIG. 8 further includes a storage module for storing program codes and data of the communication device 80.

Among them, the processing module may be a processor or a controller. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication module can be a transceiver circuit or a communication interface. The storage module may be a memory. When the processing module is a processor, the communication module is a communication interface, and the storage module is a memory, the communication device 80 shown in FIG. 8 may be the communication device shown in FIG. 2.

FIG. 9 is a schematic structural diagram of a communication system provided by an embodiment of the application. As shown in FIG. 9, the system may include a sending end 90, an RSU 91, and a receiving end.

Among them, the sending end 90 has the same function as the communication device 70 shown in FIG. 7, and the RSU 91 has the same function as the communication device 80 shown in FIG. 8.

In an example, the sending end 90 is configured to obtain the RAT corresponding to the first V2X application and the RAT supported by the receiving end. According to the RAT supported by the sending end, the RAT supported by the receiving end, and the RAT corresponding to the first V2X application, determine the The RAT that sends the message of the first V2X application to the receiving end; the RAT determined by the determining unit 702 is used to send the message of the first V2X application to the receiving end.

In another example, RSU91 is used to obtain the RAT corresponding to the first V2X application, the RAT supported by the sender, and the RAT supported by the receiver, according to the RAT corresponding to the first V2X application, the RAT supported by the sender, and the receiver The RAT supported by the terminal determines the RAT used to send the message of the first V2X application to the receiving terminal, and sends the RAT indication to the transmitting terminal, and the RAT indication is used to indicate the determined RAT.

The sending end 90 is configured to receive the RAT indication, and use the RAT indicated by the RAT indication to send the message of the first V2X application.

Specifically, the communication system provided by the embodiment of the present application may execute the method embodiments corresponding to FIG. 3 to FIG. 6, and the implementation principles and technical effects are similar, and details are not described herein again.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated as required. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed device and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components may be It can be combined or integrated into another device, or some features can be omitted 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 parts may or may not be physically separate. The parts displayed as units may be one physical unit or multiple physical units, that is, they may be located in one place, or they may be distributed to multiple different places. . 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. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of software products, which are stored in a storage medium There are several instructions to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor (processor) execute all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any change or replacement within the technical scope disclosed in this application shall be covered by the protection scope of this application . Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A communication method, characterized in that the method includes:

The transmitting end obtains the radio access technology RAT corresponding to the first Internet of Vehicles V2X application and the RAT supported by the receiving end, wherein the transmitting end supports at least two RATs, and the RAT corresponding to the first V2X application includes at least two RATs ；

The sending end determines the RAT used to send the message of the first V2X application to the receiving end according to the RAT supported by the sending end, the RAT supported by the receiving end, and the RAT corresponding to the first V2X application ；

The sending end uses the determined RAT to send the message of the first V2X application to the receiving end.
The method according to claim 1, wherein when the RAT supported by the receiving end, the RAT supported by the transmitting end, and the RAT corresponding to the first V2X application have an intersection, and the intersection only includes In the case of the first RAT, the determined RAT is the first RAT; or,

When there is an intersection between the RAT supported by the receiving end, the RAT supported by the transmitting end, and the RAT corresponding to the first V2X application, and the intersection includes at least two RATs, the determined RAT is the The RAT with the highest priority in the intersection.
The method according to claim 2, wherein the receiving end includes a terminal group, the terminal group includes at least two terminals, and the RAT supported by the receiving end is a RAT supported by all terminals in the terminal group The intersection of RAT.
The method according to claim 1, wherein the receiving end is a terminal group, the terminal group includes at least two terminals, and the RATs supported by all terminals in the terminal group do not have an intersection;

When the RAT supported by the sending end and the RAT corresponding to the first V2X application have an intersection, the intersection includes at least two RATs, and there is a first RAT in the terminal group that supports only the first RAT in the intersection. When the terminal and the second terminal that only supports the second RAT in the intersection, the determined RAT includes the first RAT and the second RAT.
The method according to claim 4, wherein the sending end using the determined RAT to send the message of the first V2X application to the receiving end comprises:

The sending end uses the first RAT to send the message of the first V2X application to the first terminal;

The sending end uses the second RAT to send the message of the first V2X application to the second terminal.
The method according to any one of claims 1-5, wherein the acquiring, by the sending end, a RAT supported by the receiving end comprises:

The sending end sends a multicast establishment request to the receiving end, and the multicast establishment request is used to request the establishment of a multicast communication group;

The sending end receives a response to the multicast establishment request from the receiving end, where the response to the multicast establishment request includes a first indication, and the first indication is used to indicate a RAT supported by the receiving end.
The method according to any one of claims 1-5, wherein the acquiring, by the sending end, a RAT supported by the receiving end comprises:

The sending end listens to the broadcast message of the receiving end; wherein the broadcast message includes a second indication, and the second indication is used to indicate the RAT supported by the sending end;

The sending end determines the RAT supported by the receiving end according to the second instruction.
The method according to any one of claims 1-5, wherein the acquiring, by the sending end, a RAT supported by the receiving end comprises:

The sending end listens to the broadcast message of the receiving end;

The sending end determines the RAT supported by the receiving end according to the message format of the broadcast message.
A communication method, characterized in that the method includes:

The roadside unit RSU obtains the radio access technology RAT corresponding to the first V2X application, the RAT supported by the transmitting end, and the RAT supported by the receiving end, where the RAT supported by the transmitting end includes at least two RATs, and the first V2X The RAT corresponding to the application includes at least two RATs;

The RSU determines the RAT used to send the message of the first V2X application to the receiving end according to the RAT corresponding to the first V2X application, the RAT supported by the sending end, and the RAT supported by the receiving end ；

The RSU sends a RAT indication to the sending end, where the RAT indication is used to indicate the determined RAT.
The method of claim 9, wherein when the RAT supported by the receiving end, the RAT supported by the transmitting end, and the RAT corresponding to the first V2X application have an intersection, and the intersection only includes In the case of the first RAT, the determined RAT is the first RAT; or,

When there is an intersection between the RAT supported by the receiving end, the RAT supported by the transmitting end, and the RAT corresponding to the first V2X application, and the intersection includes at least two RATs, the determined RAT is the The RAT with the highest priority in the intersection.
The method according to claim 10, wherein the receiving end includes a terminal group, the terminal group includes at least two terminals, and the RAT supported by the receiving end is a RAT supported by all terminals in the terminal group The intersection of RAT.
The method according to claim 11, wherein the receiving end is a terminal group, the terminal group includes at least two terminals, and the RATs supported by all terminals in the terminal group do not have an intersection;

When the RAT supported by the sending end and the RAT corresponding to the first V2X application have an intersection, the intersection includes at least two RATs, and there is a first RAT in the terminal group that supports only the first RAT in the intersection. When the terminal and the second terminal that only supports the second RAT in the intersection, the determined RAT includes the first RAT and the second RAT; or, the determined RAT includes the first RAT and The RAT with the highest priority in the second RAT.
The method according to claim 12, wherein when the determined RAT includes the RAT with the highest priority among the first RAT and the second RAT, and the RAT with the highest priority is the first RAT When, the method further includes:

Receiving, by the RSU, the message of the first V2X application sent by the sender using the first RAT;

The RSU forwards the received message of the first V2X application to the first terminal;

The RSU uses the first RAT to decode the received message of the first V2X application, uses the second RAT to re-encode the decoded message of the first V2X application, and re-encodes the first V2X application message. A message of a V2X application is sent to the second terminal.
The method according to claim 12, wherein when the determined RAT includes the first RAT and the second RAT, the method further comprises:

Receiving, by the RSU, a message of a first V2X application sent by the sending end using the first RAT and a message of the first V2X application sent by the sending end using the second RAT;

The RSU forwards the message of the first V2X application sent by the sending end using the first RAT to the first terminal, and forwards the message of the first V2X application sent by the sending end using the second RAT To the second terminal.
The method according to any one of claims 9-14, wherein the roadside unit RSU acquiring the radio access technology RAT corresponding to the first V2X application comprises:

The RSU receives a multicast establishment request from the sender, the multicast establishment request includes the RAT corresponding to the first V2X application, and the multicast establishment request is used to request the establishment of a multicast communication group;

The sending of the RAT indication by the RSU to the sending end includes: the RSU sending a response to the multicast establishment request to the sending end, and the response to the multicast establishment request carries the RAT indication.
A communication method, characterized in that the method includes:

The sending end receives the RAT indication from the roadside unit RSU, where the RAT indication is used to indicate the radio access technology RAT used to send the message of the first V2X application to the receiving end;

The sending end uses the RAT to send the message of the first V2X application according to the indication of the RAT.
The method of claim 16, wherein the method further comprises:

The sending end sends a multicast establishment request to the RSU, the multicast establishment request is used to request establishment of a multicast communication group, and the multicast establishment request carries the RAT corresponding to the first V2X application;

The receiving of the RAT indication from the RSU by the sending end includes: the sending end receives a response to the multicast setup request from the RSU, and the response to the multicast setup request carries the RAT indication.
A communication device, characterized in that the communication device includes:

The acquiring unit is configured to acquire the radio access technology RAT corresponding to the first V2X application and the RAT supported by the receiving end, wherein the communication device supports at least two RATs, and the RAT corresponding to the first V2X application includes at least two RAT;

The determining unit is configured to determine, according to the RAT supported by the communication device, the RAT supported by the receiving end, and the RAT corresponding to the first V2X application, the method used to send the message of the first V2X application to the receiving end RAT;

The sending unit is configured to send the message of the first V2X application to the receiving end using the determined RAT.
The communication device according to claim 18, wherein when the RAT supported by the receiving end, the RAT supported by the communication device, and the RAT corresponding to the first V2X application have an intersection, and the intersection is only When the first RAT is included, the determined RAT is the first RAT; or,

When the RAT supported by the receiving end, the RAT supported by the communication device, and the RAT corresponding to the first V2X application have an intersection, and the intersection includes at least two RATs, the determined RAT is the The RAT with the highest priority in the intersection.
The communication device according to claim 19, wherein the receiving end includes a terminal group, the terminal group includes at least two terminals, and the RAT supported by the receiving end is supported by all terminals in the terminal group RAT in the intersection of RAT.
The communication device according to claim 18, wherein the receiving end is a terminal group, the terminal group includes at least two terminals, and the RATs supported by all terminals in the terminal group do not have an intersection;

When the RAT supported by the communication device and the RAT corresponding to the first V2X application have an intersection, the intersection includes at least two RATs, and there is a first RAT in the terminal group that supports only the first RAT in the intersection. When the terminal and the second terminal that only supports the second RAT in the intersection, the determined RAT includes the first RAT and the second RAT.
The communication device according to claim 21, wherein the sending unit is specifically configured to:

Use the first RAT to send a message of the first V2X application to the first terminal;

Use the second RAT to send the message of the first V2X application to the second terminal.
The communication device according to any one of claims 18-22, wherein the acquiring unit is specifically configured to:

Sending a multicast establishment request to the receiving end, where the multicast establishment request is used to request the establishment of a multicast communication group;

A response to the multicast establishment request from the receiving end is received, where the response to the multicast establishment request includes a first indication, and the first indication is used to indicate a RAT supported by the receiving end.
The communication device according to any one of claims 18-22, wherein the acquiring unit is specifically configured to: listen to the broadcast message of the receiving end; wherein the broadcast message includes a second indication, The second indication is used to indicate the RAT supported by the communication device;

According to the second instruction, the RAT supported by the receiving end is determined.
The communication device according to any one of claims 18-22, wherein the acquiring unit is specifically configured to: listen to the broadcast message of the receiving end, and determine the reception according to the message format of the broadcast message RAT supported by the end.
A communication device, characterized in that the communication device includes:

The acquiring unit is configured to acquire the radio access technology RAT corresponding to the first V2X application, the RAT supported by the transmitting end, and the RAT supported by the receiving end, wherein the RAT supported by the transmitting end includes at least two RATs, and the first RATs corresponding to V2X applications include at least two RATs;

The determining unit is configured to determine a message for sending the first V2X application to the receiving end according to the RAT corresponding to the first V2X application, the RAT supported by the sending end, and the RAT supported by the receiving end RAT;

The sending unit is configured to send a RAT indication to the sending end, where the RAT indication is used to indicate the determined RAT.
The communication device according to claim 26, wherein when the RAT supported by the receiving end, the RAT supported by the transmitting end, and the RAT corresponding to the first V2X application have an intersection, and the intersection is only When the first RAT is included, the determined RAT is the first RAT; or,

When there is an intersection between the RAT supported by the receiving end, the RAT supported by the transmitting end, and the RAT corresponding to the first V2X application, and the intersection includes at least two RATs, the determined RAT is the The RAT with the highest priority in the intersection.
The communication device according to claim 27, wherein the receiving end includes a terminal group, the terminal group includes at least two terminals, and the RAT supported by the receiving end is supported by all terminals in the terminal group RAT in the intersection of RAT.
The communication device according to claim 26, wherein the receiving end is a terminal group, the terminal group includes at least two terminals, and the RATs supported by all terminals in the terminal group do not have an intersection;

When the RAT supported by the sending end and the RAT corresponding to the first V2X application have an intersection, the intersection includes at least two RATs, and there is a first RAT in the terminal group that supports only the first RAT in the intersection. When the terminal and the second terminal that only supports the second RAT in the intersection, the determined RAT includes the first RAT and the second RAT; or, the determined RAT includes the first RAT and The RAT with the highest priority in the second RAT.
The communication device according to claim 29, wherein when the determined RAT includes the RAT with the highest priority among the first RAT and the second RAT, and the RAT with the highest priority is the first In RAT, the communication device further includes:

A receiving unit, configured to receive a message of the first V2X application sent by the sending end using the first RAT;

The sending unit is further configured to forward the received message of the first V2X application to the first terminal;

And, using the first RAT to decode the received message of the first V2X application, and using the second RAT to re-encode the decoded message of the first V2X application, and the re-encoded first The message of the V2X application is sent to the second terminal.
The communication device according to claim 29, wherein when the determined RAT includes the first RAT and the second RAT, the communication device further comprises:

A receiving unit, configured to receive a message of a first V2X application sent by the sending end using the first RAT and a message of a first V2X application sent by the sending end using the second RAT;

The sending unit is configured to forward the first V2X application message sent by the sending end using the first RAT to the first terminal, and forward the first V2X application sent by the sending end using the second RAT The message of the application is forwarded to the second terminal.
The communication device according to any one of claims 26-31, wherein the acquiring unit is specifically configured to: receive a multicast establishment request from the sender, the multicast establishment request including the first The RAT corresponding to the V2X application, the multicast establishment request is used to request the establishment of a multicast communication group;

The sending unit is specifically configured to send a response to the multicast setup request to the sending end, where the response to the multicast setup request carries the RAT indication.
A communication device, characterized in that the communication device includes:

The receiving unit is configured to receive a RAT indication from the roadside unit RSU, where the RAT indication is used to indicate the radio access technology RAT used to send the message of the first V2X application to the receiving end;

The sending unit is configured to use the RAT to send the message of the first V2X application according to the indication of the RAT.
The communication device according to claim 33, wherein:

The sending unit is further configured to send a multicast establishment request to the RSU, the multicast establishment request is used to request the establishment of a multicast communication group, and the multicast establishment request carries the RAT corresponding to the first V2X application ；

The receiving unit is further configured to receive a response to the multicast setup request from the RSU, where the response to the multicast setup request carries the RAT indication.
A communication system, characterized in that the communication system includes: a sending end and a receiving end;

The sending end is configured to obtain the radio access technology RAT corresponding to the first Internet of Vehicles V2X application, and the RAT supported by the receiving end, where the sending end supports at least two RATs, and the first V2X application corresponds to RAT includes at least two RATs;

The sending end is further configured to determine, according to the RAT supported by the sending end, the RAT supported by the receiving end, and the RAT corresponding to the first V2X application, to send the first V2X application to the receiving end The RAT of the message, using the determined RAT, to send the message of the first V2X application to the receiving end.
A communication system, characterized in that the communication system includes: a roadside unit RSU and a sending end;

The RSU is used to obtain the radio access technology RAT corresponding to the first Internet of Vehicles V2X application, the RAT supported by the transmitting end, and the RAT supported by the receiving end, wherein the RAT supported by the transmitting end includes at least two RATs, so The RAT corresponding to the first V2X application includes at least two RATs;

The RSU is further configured to determine, according to the RAT corresponding to the first V2X application, the RAT supported by the sending end, and the RAT supported by the receiving end, to send the first V2X application to the receiving end The RAT of the message, send a RAT indication to the sender, where the RAT indication is used to indicate the determined RAT

The sending end is configured to receive the RAT indication from the RSU, and according to the RAT indication, use the RAT to send the message of the first V2X application.
A communication device, wherein the communication device includes one or more processors and a communication interface, and the one or more processors and the communication interface are used to support the communication device to execute any of claims 1-8. One of the communication method or the communication method of any one of claims 16-17.
A computer-readable storage medium, wherein the computer-readable storage medium includes computer instructions, which when run on a computer, cause the computer to execute the communication method according to any one of claims 1-8 or The communication method of any one of claims 16-17.
A computer program product, wherein the computer program product includes computer instructions, when the computer instructions are executed on a computer, the computer executes the communication method according to any one of claims 1-8 or claims 16- 17. The communication method described in any one of.
A communication device, wherein the communication device includes one or more processors and a communication interface, and the one or more processors and the communication interface are used to support the communication device to execute any of claims 9-15. The communication method described in one item.
A computer-readable storage medium, wherein the computer-readable storage medium includes computer instructions, which when run on a computer, cause the computer to execute the communication method according to any one of claims 9-15.
A computer program product, wherein the computer program product includes computer instructions, which when the computer instructions are executed on a computer, cause the computer to execute the communication method according to any one of claims 9-15.