WO2021013203A1

WO2021013203A1 - Communication method and device

Info

Publication number: WO2021013203A1
Application number: PCT/CN2020/103611
Authority: WO
Inventors: 赵灿
Original assignee: 华为技术有限公司
Priority date: 2019-07-23
Filing date: 2020-07-22
Publication date: 2021-01-28
Also published as: CN112367343B; CN112367343A

Abstract

The present application provides a communication method and device. According to the method, a server can determine a first forwarding rule of early-warning information, the first forwarding rule being used for instructing a terminal device receiving the early-warning information to send the early-warning information according to the first forwarding rule. The server can also send the first forwarding rule to a first roadside unit. The first roadside unit is located in an upstream direction of a target area, the upstream direction is a direction opposite to a direction allowing to pass of a lane, the lane is a lane included in a road where the target area is located, and the target area is an area where an early-warning cannot be provided by means of the roadside unit. In the method, a terminal device forwards early-warning information according to a first forwarding rule, thereby improving the reliability of an early-warning information forwarding process.

Description

Communication method and device

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910667571.3, and the application name is "a communication method and device" on July 23, 2019, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the technical field of Internet of Vehicles, and in particular to a communication method and device.

Background technique

At present, in the vehicle to everything (V2X), when a V2X message needs to be sent to a vehicle-mounted terminal device, the V2X server can be used to send the V2X message to be sent to the roadside unit (RSU). The roadside unit broadcasts the V2X message to the vehicle-mounted terminal equipment in the coverage area of the roadside unit through short-range communication.

However, when a V2X message needs to be broadcast in a certain area but there is no roadside unit coverage in the area, or the roadside unit covering the area cannot forward the V2X message in time due to load or network reasons, it may result in the area Vehicular terminal equipment cannot receive the V2X message, so the reliability of the current V2X message transmission needs to be improved.

Summary of the invention

The present application provides a communication method and device to improve the reliability of V2X message transmission.

In the first aspect, this application provides a communication method, which can be executed by a server (or called a car networking server, a car networking platform, etc.). According to this method, the server can determine the first forwarding rule of the warning information, and the first forwarding rule is used to instruct the terminal device receiving the warning information to send the warning information according to the first forwarding rule. The server may also send the first forwarding rule to the first roadside unit. Wherein, the first roadside unit is located in the upstream direction of the target area, or the first roadside unit is located in the upstream direction of the target area. Wherein, the upstream direction is the opposite direction to the allowable direction of the lane, and the lane is the lane included in the road where the target area is located. The target area is an area where the roadside unit cannot be used for early warning.

Using the above method, the terminal device can receive the first forwarding rule from the first roadside unit upstream of the target area, and forward the warning information according to the first forwarding rule, so that the car networking terminal in the target area can receive the warning forwarded by the terminal device Therefore, when V2X messages are forwarded to the target area, the roadside unit covering the target area can no longer be used, which can improve the reliability of the early warning information forwarding process.

In a possible design, when the road where the target area is located includes a first lane and a second lane, and the allowable direction of the first lane is different from the allowable direction of the second lane, the The upstream direction may include a direction opposite to the allowable direction of the first lane, and/or the upstream direction includes the opposite direction of the allowable direction of the second lane.

In another possible design, when the road where the target area is located includes a third lane and the road does not include a lane different from the allowable direction of the third lane, the upstream direction may include the The direction opposite to the permitted direction of the third lane.

The above first forwarding rule may include a first identifier, and the first identifier is used to instruct the terminal device receiving the warning information to forward the warning information. With this design, the terminal device can determine the need to forward the warning information, so as to further improve the reliability of forwarding the warning information.

The above first forwarding rule may include first time information and/or location information. Wherein, the first time information is used to indicate the start time and/or end time of the terminal device to forward the warning information. The location information is used to indicate the start location and/or the end location of the terminal device to forward the warning information.

When the first forwarding rule includes the first time information, the server may determine the first time information according to the coverage area of the first roadside unit, the range of the target area, and vehicle speed information. The information is used to indicate the speed of the vehicle to which the terminal device belongs. Exemplarily, the vehicle speed information may be used to indicate the average vehicle speed of the current road section. Alternatively, the vehicle speed information may be used to indicate the maximum speed limit and/or the minimum speed limit of the current road section, etc. With this design, the server can determine the start time and/or end time of the terminal device forwarding the warning information, ensuring that the terminal device forwards the warning information in the target area, so as to further improve the reliability of forwarding the warning information in the target area.

When the first forwarding rule includes the location information, the server may determine the location information according to the coverage area of the first roadside unit and the range of the target area. With this design, the server can determine the start position and/or end position of the terminal device to forward the early warning information to ensure that the terminal device forwards the early warning information in the target area, so as to further improve the reliability when forwarding the early warning information in the target area.

The above target area may be located within the influence range of the early warning event corresponding to the early warning information, and the target area is not covered by roadside units. Alternatively, the above target area may be located within the influence range of the early warning event corresponding to the early warning information, and the second roadside unit covering the target area does not meet a specific condition. By adopting this design, the reliability of forwarding early warning information can be improved when there is no roadside unit coverage within the influence range of an early warning event or the coverage area without a roadside unit meeting specific conditions.

In a possible example, if the target area is within the influence range of the early warning event corresponding to the early warning information, and the second roadside unit covering the target area does not meet a specific condition, the specific condition includes operating Status condition, the server can determine that the second roadside unit does not meet the operating status condition according to the operating status information of the second roadside unit; the operating status information of the second roadside unit includes the following Part or all of the information in the information: information about the message types that the second roadside unit supports to forward; or, the number of concurrent messages supported by the second roadside unit; or, the current concurrency of the second roadside unit The number of messages; or, the buffering capability information of the second roadside unit; or, the number of messages currently buffered by the second roadside unit.

In another possible example, if the target area is within the influence range of the early warning event corresponding to the early warning information, and the second roadside unit covering the target area does not meet a specific condition, the specific condition includes Network status condition, the server may determine that the second roadside unit does not meet the network status condition according to the network status information of the second roadside unit; the network status information of the second roadside unit includes Part or all of the following information: information used to indicate the load status of the short-distance communication network of the second roadside unit; or information used to indicate the quality of the short-distance communication network of the second roadside unit .

The above first forwarding rule may include forwarding frequency and/or forwarding priority.

The server may also send second time information to the first roadside unit, where the second time information is used to instruct the first roadside unit to send the start time and/or end time of the first forwarding rule . With this design, the first roadside unit can forward the first forwarding rule at a specified time, so as to save signaling overhead.

The server may also send a second identifier to the first roadside unit, where the second identifier is used to instruct the first roadside unit to start forwarding the first forwarding rule after receiving the first forwarding rule. Forwarding rules. By adopting this design, the first roadside unit can forward the first forwarding rule at a time and improve the reliability of forwarding warning information.

The above first roadside unit may be the first roadside unit in the upstream direction of the target area. In other words, the first roadside unit is the roadside unit closest to the target area in the upstream direction of the target area.

The server may also send a second forwarding rule of the warning information to a third roadside unit, where the second forwarding rule includes a third identifier, and the third identifier is used to indicate that the terminal device receiving the warning information does not Forward the warning information. With this design, the terminal device can be prevented from forwarding the warning information, so as to save the signaling overhead.

The server may also send third time information to the third roadside unit, where the third time information is used to instruct the third roadside unit to send the start time and/or end time of the second forwarding rule . With this design, the first roadside unit can forward the second forwarding rule at a specified time to save signaling overhead.

The server may also send a fourth identifier to the third roadside unit, where the fourth identifier is used to instruct the third roadside unit to start sending the second forwarding rule after receiving the second forwarding rule. Forwarding rules. With this design, the first roadside unit can be timed to forward the second forwarding rule, thereby instructing the terminal device not to forward the warning information in time to save signaling overhead.

Exemplarily, the third roadside unit may be located in a downstream direction of the target area, and the downstream direction is an allowable direction of the road. In other words, the downstream direction is opposite to the upstream direction.

The server may also subscribe to one or more roadside units (including but not limited to the first roadside unit, the second roadside unit, and the third roadside unit) for operation status information, network status information or instructions of the roadside unit One or more types of information in the information, for example, the server sends a subscription request to one or more roadside units respectively. The server may also receive one or more of operating status information, network status information, or indication information sent by any one or more of the one or more roadside units. Among them, the operating status information can be used by the server to determine whether the roadside unit meets the operating status conditions. The network status information can be used by the server to determine whether the roadside unit meets the network status conditions. The indication information can be used to indicate whether the roadside unit meets the operating state condition, and/or used to indicate whether the roadside unit meets the network state condition. With this design, the server can learn which roadside units are unable to forward the warning information, so as to forward the warning information in the coverage area of these roadside units through the terminal device, so as to improve the forwarding reliability of the warning information.

In the second aspect, the present application provides a communication method, which can be implemented by the first roadside unit. According to this method, the first roadside unit receives the first forwarding rule of the warning information from the server, and the first forwarding rule is used to instruct the terminal device receiving the warning information to send the warning information according to the first forwarding rule. The first roadside unit may also send the first forwarding rule. The first roadside unit may be located in an upstream direction of the target area, where the upstream direction is the opposite direction of the lane allowing passage, the lane is a lane included in the road where the target area is located, and the target area is an impassable The area where the roadside unit is warned.

The first roadside unit may also receive second time information from the server, where the second time information is used to indicate the start time and/or end time for the first roadside unit to send the first forwarding rule . The first roadside unit may also send the first forwarding rule according to the second time information.

The first roadside unit may also receive a third identifier from the server, and according to the third identifier, start to forward the first forwarding rule after receiving the first forwarding rule.

The first roadside unit may broadcast the first forwarding rule, and/or send the first forwarding rule to terminal devices in the coverage area of the first roadside unit.

The first roadside unit may be the first roadside unit located in the upstream direction of the target area.

The first roadside unit may also receive a subscription request from the server, and the subscription request may be used to request the first roadside unit to send one or more of operating status information, network status information, or indication information. The subscription request can be used to request the first roadside unit to periodically report operating status information and/or network status information, or the subscription request can be used to request the first roadside unit to report operating status information and/or after meeting the operating status threshold. Network status information, or the subscription request can be used to request the first roadside unit to report indication information after determining that it does not meet a specific condition. With this design, the server can learn whether the first roadside unit cannot forward the warning information, so that when the first roadside unit cannot forward the warning information, the terminal device can forward the warning information within the coverage area of the first roadside unit to Improve the reliability of forwarding warning information.

In the third aspect, the present application provides a communication method, which can be implemented by a second roadside unit. According to this method, the second roadside unit can receive a subscription request from the server, and the subscription request can be used to request the second roadside unit to send one or more of operating status information, network status information, or indication information. The subscription request can be used to request the second roadside unit to periodically report operating status information and/or network status information, or the subscription request can be used to request the second roadside unit to report indication information after determining that it does not meet certain conditions. With this design, the server can know whether the second roadside unit cannot forward the warning information, so that when the second roadside unit cannot forward the warning information, the terminal device can forward the warning information within the coverage area of the second roadside unit to Improve the reliability of forwarding warning information. The second roadside unit may send one or more of operating status information, network status information or indication information according to the subscription request.

In a fourth aspect, the present application provides a communication method, which can be implemented by a third roadside unit. According to this method, the third roadside unit can receive the second forwarding rule of the warning information from the server, the second forwarding rule includes a third identifier, and the third identifier is used to instruct the terminal device receiving the warning information not to forward The warning information. The third roadside unit may send the second forwarding rule. Wherein, the third roadside unit may be located in a downstream direction of the target area, the downstream direction is the allowable direction of the lane, the lane is a lane included in the road where the target area is located, and the target area is Areas that cannot be warned by roadside units. With this method, the third roadside unit can forward the second forwarding rule of the warning information to the terminal devices to instruct these terminal devices not to forward the warning information, thereby saving signaling overhead.

The third roadside unit may also receive third time information from the server, and send the second forwarding rule according to the third time information, where the third time information is used to instruct the second roadside unit Send the start time and/or end time of the second forwarding rule. With this design, the third roadside unit can forward the second forwarding rule at a specified time to save signaling overhead.

The third roadside unit may also receive a fourth identifier from the server, and according to the fourth identifier, start to forward the second forwarding rule after receiving the second forwarding rule. With this design, the third roadside unit can immediately forward the second forwarding rule, thereby instructing the terminal device not to forward the warning information in time to save signaling overhead.

The third roadside unit may broadcast the second forwarding rule and/or send the second forwarding rule to terminal devices in the coverage area of the third roadside unit.

In a fifth aspect, this application provides a communication method, which can be implemented by a terminal device. According to this method, the terminal device can receive the first forwarding rule of the warning information from the first roadside unit, and after receiving the warning information, send the warning information according to the first forwarding rule. Wherein, the first roadside unit may be located in the upstream direction of the target area, the upstream direction is the opposite direction of the lane allowed to pass, the lane is the lane included in the road where the target area is located, and the target area is Areas that cannot be warned by roadside units. With this design, the terminal device can receive the first forwarding rule from the first roadside unit upstream of the target area, and forward the warning information according to the first forwarding rule, so as to improve the reliability of the forwarding of the warning information.

The above first forwarding rule may include a first identifier, and the first identifier is used to instruct the terminal device receiving the warning information to forward the warning information.

The foregoing first forwarding rule may include first time information and/or location information. Wherein, the first time information is used to indicate the start time and/or end time of the terminal device forwarding the warning information; the location information is used to indicate the starting position and/or the terminal device forwarding the warning information Or end position.

The above-mentioned first forwarding rule includes forwarding frequency and/or forwarding priority.

The terminal device may also receive the warning information from the first roadside unit.

The terminal device may also receive a second forwarding rule of the warning information from a third roadside unit, the second forwarding rule includes a third identifier, and the third identifier is used to indicate a terminal device that receives the warning information The warning information is not forwarded. The third roadside unit may be located in a downstream direction of the target area, and the downstream direction is an allowable direction of the lane. With this method, when the terminal device moves downstream of the target area, the third roadside unit can be used to instruct the terminal device not to forward the warning information, so as to save signaling overhead.

In the sixth aspect, this application provides a communication device, which can be used to execute the method provided in the first aspect or any possible design of the first aspect. The communication device may include the above server. The communication device can implement each function in the above-mentioned methods through a hardware structure, a software module, or a hardware structure plus a software module.

When constituted by a software module, the communication device may include a communication module and a processing module coupled with each other. The communication module may be used to support the communication device to communicate, and the processing module may be used for the communication device to perform processing operations, such as generating information/messages that need to be sent. , Or process the received signal to get information/message.

When the method provided in the above first aspect is executed, the processing module may be used to determine a first forwarding rule of the warning information, and the first forwarding rule is used to instruct the terminal device receiving the warning information to send according to the first forwarding rule The warning information. The communication module may be used to send the first forwarding rule to the first roadside unit. Wherein, the first roadside unit may be located in the upstream direction of the target area, the upstream direction is the opposite direction of the lane allowed to pass, the lane is the lane included in the road where the target area is located, and the target area is Areas that cannot be warned by roadside units.

The above first forwarding rule includes a first identifier, and the first identifier is used to instruct the terminal device receiving the warning information to forward the warning information.

The above first forwarding rule includes first time information and/or location information. Wherein, the first time information is used to indicate the start time and/or end time of the terminal device to forward the warning information. The location information is used to indicate the start location and/or the end location of the terminal device to forward the warning information.

When the first forwarding rule includes the first time information, the processing module may be further configured to determine the first time information according to the coverage area of the first roadside unit, the range of the target area, and vehicle speed information, The vehicle speed information is used to indicate the vehicle speed of the vehicle to which the terminal device belongs.

When the first forwarding rule includes the location information, the processing module may be further configured to determine the location information according to the coverage area of the first roadside unit and the range of the target area.

The above target area is located within the influence range of the early warning event corresponding to the early warning information, and the target area is not covered by roadside units, and/or the above target area is located within the influence range of the early warning event corresponding to the early warning information, and The second roadside unit covering the target area does not meet a specific condition.

In a possible example, if the target area is within the influence range of the early warning event corresponding to the early warning information, and the second roadside unit covering the target area does not meet a specific condition, the specific condition includes operating State condition, the processing module may be further configured to determine that the second roadside unit does not meet the operating state condition according to the operating state information of the second roadside unit. Wherein, the operating state information of the second roadside unit includes some or all of the following information: information about the message types that the second roadside unit supports forwarding; or, the concurrency supported by the second roadside unit The number of messages; or, the current number of concurrent messages of the second roadside unit; or, the buffering capability information of the second roadside unit; or, the current number of messages buffered by the second roadside unit.

In another possible example, if the target area is within the influence range of the early warning event corresponding to the early warning information, and the second roadside unit covering the target area does not meet a specific condition, the specific condition includes The network state condition, the processing module may be further configured to determine that the second roadside unit does not satisfy the network state condition according to the network state information of the second roadside unit. Wherein, the network status information of the second roadside unit includes some or all of the following information: information used to indicate the load status of the short-distance communication network of the second roadside unit; or, used to indicate all Information about the quality of the short-distance communication network of the second roadside unit.

The above first forwarding rule may also include forwarding frequency and/or forwarding priority.

Optionally, the communication module may be further configured to: send second time information to the first roadside unit, where the second time information is used to instruct the first roadside unit to send the information of the first forwarding rule Start time and/or end time; or, send a second identifier to the first roadside unit, where the second identifier is used to indicate that the first roadside unit starts from receiving the first forwarding rule Forward the first forwarding rule.

The above first roadside unit may be the first roadside unit in the upstream direction of the target area.

The communication module may also be configured to send a second forwarding rule of the warning information to a third roadside unit, the second forwarding rule includes a third identifier, and the third identifier is used to indicate a terminal that receives the warning information The device does not forward the warning information.

The communication module may be further configured to send third time information to the third roadside unit, where the third time information is used to indicate the start time of the third roadside unit sending the second forwarding rule and/ Or end time; or, send a fourth identifier to the third roadside unit, where the fourth identifier is used to indicate that the third roadside unit starts to send the first forwarding rule since receiving the second forwarding rule 2. Forwarding rules.

The above third roadside unit may be located in a downstream direction of the target area, and the downstream direction is an allowable direction of the lane.

The communication module can also be used to send the above subscription request to the roadside unit, and receive one or more of operating status information, network status information or indication information from the roadside unit. The processing module may also determine whether the roadside unit does not meet specific conditions according to one or more of the operation status information, network status information, or indication information of the roadside unit.

When the communication device shown in the sixth aspect or any possible design of the sixth aspect is implemented by hardware components, the communication device may include a communication interface and a processor. Among them, the communication interface can be used for communication with the communication device. The processor may be used to read and call the program stored in the memory to execute the method provided in the first aspect or any possible design of the first aspect. In addition, the communication device may further include a memory coupled with the processor for storing the above-mentioned program. Exemplarily, the processor may be used to read and call a program stored in the memory, and execute the method executed by the above processing module. The communication interface can be used to execute the method executed by the above communication module.

In a seventh aspect, the present application provides a communication device that can be used to execute the method provided in the above second aspect or any possible design of the second aspect. The communication device may include the above first roadside unit. The communication device can implement each function in the above-mentioned methods through a hardware structure, a software module, or a hardware structure plus a software module.

When constituted by a software module, the communication device may include a communication module and a processing module that are coupled to each other, wherein the communication module may be used to support the communication device to communicate, for example, through wired and/or wireless communication. The processing module can be used for communication devices to perform processing operations, such as generating information/messages to be sent, or processing received signals to obtain information/messages.

When the method provided in the above first aspect is executed, the communication module may be used to receive a first forwarding rule of the warning information from the server, and the first forwarding rule is used to instruct the terminal device that receives the warning information to forward according to the first Rules to send the warning information. The communication module may also be used to send the first forwarding rule. Wherein, the communication device may be located in the upstream direction of the target area, the upstream direction is the opposite direction of the lane allowing passage, the lane is the lane included in the road where the target area is located, and the target area is an impassable road. The area where the side unit carries out early warning.

The communication module may also be used to receive second time information from the server, and send the first forwarding rule according to the second time information, and the second time information is used to instruct the communication device to send the The start time and/or end time of the first forwarding rule.

The communication module may be further configured to receive a third identifier from the server, and according to the third identifier, start forwarding the first forwarding rule after receiving the first forwarding rule.

The communication module may be specifically configured to broadcast the first forwarding rule and/or send the first forwarding rule to terminal devices in the coverage area of the communication device.

The communication device may be the first roadside unit in the upstream direction of the target area.

The communication module may also be used to receive a subscription request from the server, and send one or more of operating status information, network status information or indication information to the server according to the subscription request. The processing module can be used for the communication device to determine whether it meets a specific condition, and if not, the communication module can also be used for sending instruction information to the server.

When the communication device shown in the seventh aspect or any possible design of the seventh aspect is implemented by hardware components, the communication device may include a communication interface, a transceiver, and a processor. Wherein, the communication interface can be used for the communication device to perform wired communication, for example, it can be used for the communication device to communicate with the server described in this application. The transceiver can be used for the communication device to perform wireless communication through a wireless air interface (for example, through the PCF5 mode or the DSRC mode), for example, it can be used for the terminal device to communicate with the terminal device described in this application. The processor may be used to read and call the program stored in the memory to execute the method provided in the second aspect or any possible design of the second aspect. In addition, the communication device may further include a memory coupled with the processor for storing the above-mentioned program. Exemplarily, the processor may be used to read and call a program stored in the memory, and execute the method executed by the above processing module. The communication interface can be used to execute the first forwarding rule, the second time information or the step of receiving part or all of the information in the third identifier of the early warning information executed by the above communication module, or for other communication with the server described in this application. Communication steps. The transceiver can be used to execute the sending step of the first forwarding rule of the warning information executed by the above communication module.

In an eighth aspect, the present application provides a communication device that can be used to implement the method provided in the third aspect or any possible design of the third aspect. The communication device may include the above second roadside unit. The communication device can implement each function in the above-mentioned methods through a hardware structure, a software module, or a hardware structure plus a software module.

When constituted by a software module, the communication device may include a communication module and a processing module that are coupled to each other, wherein the communication module may be used to support the communication device to communicate, for example, through wired and/or wireless communication. The processing module can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.

The communication module can be used to receive subscription requests from the server. The communication module can also be used to send one or more of operating status information, network status information or indication information to the server according to the subscription request. The subscription request can be used to request the second roadside unit to periodically report operating status information and/or network status information, or the subscription request can be used to request the second roadside unit to report indication information after determining that it does not meet certain conditions. The processing module can be used for the communication device to determine whether it meets a specific condition, and if not, the communication module can also be used for sending instruction information to the server.

When the communication device shown in the eighth aspect or any possible design of the eighth aspect is implemented by hardware components, the communication device may include a communication interface and a processor. Wherein, the communication interface can be used for the communication device to perform wired communication, for example, it can be used for the communication device to communicate with the server described in this application. The processor can be used to read and call the program stored in the memory to execute the method provided in the third aspect or any possible design of the third aspect. Exemplarily, the processor may be used to read and call a program stored in the memory, and execute the method executed by the above processing module. The communication interface can be used to execute the method executed by the above communication module.

In the ninth aspect, this application provides a communication device, which can be used to implement the method provided in the fourth aspect or any possible design of the fourth aspect. The communication device may include the above third roadside unit. The communication device can implement each function in the above-mentioned methods through a hardware structure, a software module, or a hardware structure plus a software module.

The communication module may be used to receive a second forwarding rule of the warning information from a server, the second forwarding rule includes a third identifier, and the third identifier is used to instruct the terminal device receiving the warning information not to forward the warning information. The communication module may also send the second forwarding rule. Wherein, the third roadside unit may be located in the downstream direction of the target area, the downstream direction is the allowable direction of the lane, the lane is a lane included in the road where the target area is located, and the target area is a non-passable lane. The area where the roadside unit is warned.

Exemplarily, when the road on which the target area is located includes a first lane and a second lane, and the allowable direction of the first lane is different from the allowable direction of the second lane, the downstream direction includes all The allowable direction of the first lane, and/or, the upstream direction includes the allowable direction of the second lane.

In addition, when the road where the target area is located includes a third lane and the road does not include a lane different from the allowable direction of the third lane, the upstream direction includes the allowable direction of the third lane.

The communication module may also receive third time information from the server, and send the second forwarding rule according to the third time information, where the third time information is used to instruct the second roadside unit to send the first 2. The start time and/or end time of the forwarding rule.

The communication module may also receive a fourth identifier from the server, and according to the fourth identifier, start to forward the second forwarding rule after receiving the second forwarding rule.

The communication module may also broadcast the second forwarding rule and/or send the second forwarding rule to terminal devices in the coverage area of the third roadside unit.

When the ninth aspect or the communication device shown in any possible design of the ninth aspect is implemented by hardware components, the communication device may include a communication interface, a transceiver, and a processor. Wherein, the communication interface can be used for the communication device to perform wired communication, for example, it can be used for the communication device to communicate with the server described in this application. The transceiver can be used for the communication device to perform wireless communication through a wireless air interface, for example, it can be used for the terminal device to communicate with the terminal device described in this application. The processor can be used to read and call the program stored in the memory to execute the method provided in the third aspect or any possible design of the third aspect. Exemplarily, the processor may be used to read and call a program stored in the memory, and execute the method executed by the above processing module. The communication interface can be used to execute the method executed by the above communication module. The transceiver can be used to execute the sending step of the second forwarding rule of the warning information executed by the above communication module.

In a tenth aspect, this application provides a communication device that can be used to implement the method provided in the fifth aspect or any possible design of the fifth aspect. The communication device may include the above terminal device. The communication device can implement each function in the above-mentioned methods through a hardware structure, a software module, or a hardware structure plus a software module.

The communication module may be used to receive the first forwarding rule of the warning information from the first roadside unit, and the communication module may also be used to send the warning information according to the first forwarding rule after receiving the warning information. Wherein, the first roadside unit may be located in the upstream direction of the target area, the upstream direction is the opposite direction of the lane allowed to pass, the lane is the lane included in the road where the target area is located, and the target area is Areas that cannot be warned by roadside units.

The above first forwarding rule may include first time information and/or location information. Wherein, the first time information is used to indicate the start time and/or end time of forwarding the early warning information by the communication device. The location information is used to indicate the start location and/or the end location of the communication device to forward the warning information.

The communication module can also be used to receive the warning information from the first roadside unit.

The communication module may also be used to receive a second forwarding rule of the warning information from a third roadside unit, the second forwarding rule includes a third identifier, and the third identifier is used to indicate a terminal device that receives the warning information The warning information is not forwarded. The third roadside unit is located in a downstream direction of the target area, and the downstream direction is a lane allowable direction.

In an eleventh aspect, the present application provides a communication system, which may include the communication device according to any one of the sixth aspect or the sixth aspect, the communication device according to any one of the seventh aspect or the seventh aspect, and the communication device described above. The communication device of the tenth aspect or any one of the tenth aspects. The communication system may further include the communication device according to any one of the eighth aspect or the eighth aspect and/or the communication device according to any one of the ninth or the ninth aspect.

In a twelfth aspect, this application provides a computer storage medium in which instructions (or programs) are stored, which when called for execution on a computer, cause the computer to execute the first aspect or the first aspect Any one of the possible designs, any one of the second or second aspects, any one of the third or third aspects, any one of the fourth or fourth aspects Design or the method described in the fifth aspect or any one of the possible designs of the fifth aspect.

In the thirteenth aspect, this application provides a computer program product. The basic computing product may contain instructions that, when the computer program product runs on a computer, cause the computer to execute the first aspect or any one of the first aspects. , Any possible design of the second or second aspect, any possible design of the third or third aspect, any possible design of the fourth or fourth aspect, or fifth Aspect or any one of the possible designs of the fifth aspect.

In a fourteenth aspect, the present application provides a chip or a chip system including the chip, and the chip may include a processor. The chip may also include a memory (or storage module) and/or a transceiver (or communication module). The chip can be used to call and execute the program stored in the memory (or storage module), execute any possible design of the first aspect or the first aspect, any possible design of the second aspect or the second aspect, Any possible design of the third or third aspect, any possible design of the fourth or fourth aspect, or the method described in any possible design of the fifth or fifth aspect . The chip system may be composed of the above-mentioned chips, or may include the above-mentioned chips and other discrete devices, such as a memory (or storage module) and/or a transceiver (or communication module).

For the beneficial effects of the above-mentioned second aspect to the fourteenth aspect and its possible designs, reference may be made to the description of the beneficial effects of the method in the first aspect and its possible designs.

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 flowchart of a communication method provided by an embodiment of this application;

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

4 is a schematic structural diagram of a communication device provided by an embodiment of this application;

FIG. 5 is a schematic structural diagram of another communication device provided by an embodiment of this application;

FIG. 6 is a schematic structural diagram of another communication device provided by an embodiment of this application;

FIG. 7 is a schematic structural diagram of another communication device provided by an embodiment of this application;

FIG. 8 is a schematic structural diagram of another communication device provided by an embodiment of this application;

FIG. 9 is a schematic structural diagram of another communication device provided by an embodiment of this application.

Detailed ways

A communication system provided by an embodiment of the present application may include a car networking terminal, a roadside unit, and a car networking server.

Among them, the vehicle networking terminal may also be referred to as a vehicle networking communication device or a vehicle-mounted terminal device in this application, and may be referred to as a terminal or a terminal device in the following. The IoV terminal can be an IoV terminal of a vehicle or non-motor vehicle with a communication function, a portable device, a wearable device, a mobile phone (or "cellular" phone), a portable, pocket-sized, handheld terminal, or these devices Chips in etc. A vehicle is a typical Internet of Vehicles terminal. In the following embodiments, a vehicle is used as an example for description. The embodiments using a vehicle as an example in this application may also be applied to other types of terminals. Those skilled in the art should understand that the Internet of Vehicles terminal may specifically execute Internet of Vehicles related business processes through its internal functional units or devices. For example, when the Internet of Vehicles terminal is a vehicle, one or more of the following devices in the vehicle can be used to execute the method flow related to the Internet of Vehicles terminal in the embodiment of the present application, such as a telematics box (T-Box), a domain controller ( domian controller, DC), multi-domian controller (MDC), onboard unit (OBU), or car networking chip, etc.

The roadside unit can be used to send V2X messages to car networking terminals through direct communication (PC5) or dedicated short-range communications (dedicated short range communications, DSRC) communication methods. For example, the V2X message can carry warning information or other information that needs to be notified to the car networking terminal. Among them, the communication method between the roadside unit and the terminal can be referred to as vehicle to roadside infrastructure (V2I) communication. This application does not specifically limit the specific deployment form of the roadside unit, which may be an Internet of Vehicles terminal, mobile or non-mobile terminal equipment, server or chip, etc. The roadside unit can also be used to report the early warning information of the early warning events occurring within the jurisdiction to the Internet of Vehicles server, for example, to report the early warning information through roadside information (RSI) messages, or to indicate the early warning events through the RSI message report announcement of.

The car networking server may be a car networking platform or server that manages car networking terminals and/or roadside units, and the car networking server may be referred to as a server for short in the following. The specific deployment form of the Internet of Vehicles server is not limited in this application. The specific deployment form may be cloud deployment, or an independent computer device or chip. When a V2X message needs to be sent to a car networking terminal, the car networking server can send the V2X message to the roadside unit, and the roadside unit broadcasts it to the car networking terminal in its coverage area.

Based on the above communication system, the Internet of Vehicles server can communicate with multiple roadside units deployed on the roadside of a road (the road may include one or more lanes). Each roadside unit can send V2X messages to the IoV terminal within its own coverage area. The coverage areas of the above multiple RSUs may overlap.

In Fig. 1, Fig. 1(a), Fig. 1(b) and Fig. 1(c) respectively show different deployment modes of multiple roadside units RSU1, RSU2, RSU3, RSU4, and RSU5 within the same road range. The Internet of Vehicles terminal may include the first Internet of Vehicles terminal or the second Internet of Vehicles terminal as shown in FIG. 1(a), or include other Internet of Vehicles terminals not shown in the drawings. It should be understood that FIG. 1 only shows that the road includes the illustrated lane 1 and lane 2, and the application does not limit the road to include other lanes.

Taking the RSU deployment method shown in Figure 1(a) as an example, the coverage area of RSU1 can be represented by area GH (that is, the area between the position shown by the dotted line G and the position shown by the dotted line H), and the coverage area of RSU2 can be represented by the area EF (That is, the area between the position shown by the dotted line E and the position shown by the dotted line F) indicates that the coverage area of the RSU3 can be represented by the area CD (that is, the area between the position shown by the dotted line C and the position shown by the dotted line D). As shown in Fig. 1(b), the coverage area of RSU4 can be represented by area GH. As shown in Figure 1(c), the coverage area of RSU5 can be represented by area CD.

The coverage area of each RSU above may include lane 1 and/or lane 2 of the road. In other words, the road where the coverage area of each RSU is located includes lane 1 and/or lane 2. Taking RSU2 as an example, the coverage area of RSU2 includes the area where the area EF overlaps with lane 1, and/or the area where the area EF including RSU2 overlaps with lane 2.

According to the RSU deployment method shown in Figure 1(a), in this example, both RSU1 and RSU2 are located in lane 1 (or both RSU1 and RSU2 are located on the side of lane 1), and the allowable directions of lane 1 and lane 2 are the same . In this example, it can be said that RSU1 is located in the upstream direction (or referred to as upstream) of the coverage area of RSU2, which is opposite to the allowable direction of lane 1 and/or lane 2. Wherein, the lane refers to the route on the road for vehicles to travel. Each road may include one or more lanes, and the allowable direction of each lane may be the same or different. The allowable direction of the lane, that is, the direction in which vehicles are allowed to travel in the lane. In addition, in this example, it can be said that RSU2 is located in the downstream direction (or downstream) of the coverage area of RSU1, and the downstream direction is the allowable direction of lane 1 and lane 2.

According to the RSU deployment mode shown in Figure 1(b), RSU2 is located in lane 1 and RSU4 is located in lane 2, and the allowable direction of lane 1 is the same as the allowable direction of lane 2. Exemplarily, it can be said that RSU4 is located in the upstream direction of the coverage area of RSU2, and the upstream direction is opposite to the allowable direction of lane 1 and/or lane 2. In addition, in this example, it can be said that RSU2 is located in the downstream direction (or downstream) of the coverage area of RSU4, and the downstream direction is the allowable direction of lane 1 and lane 2.

According to the RSU deployment mode shown in Figure 1(c), RSU2 is located in lane 1 and RSU5 is located in lane 2, and the allowable direction of lane 1 is opposite to the allowable direction of lane 2. Exemplarily, it can be said that RSU5 is located in the upstream direction of the coverage area of RSU2, and the upstream direction is opposite to the allowable direction of lane 2. In this example, it can be said that RSU2 is located in the downstream direction (or downstream) of the coverage area of RSU5, and the downstream direction is the allowable direction of lane 2. In addition, according to the RSU deployment mode shown in FIG. 1(c), it can be said that RSU1 is located in the upstream direction of the coverage area of RSU2, and/or it can be said that RSU2 is located in the downstream direction of the coverage area of RSU1.

It should be understood that the Internet of Vehicles server can obtain the coverage area information of each roadside unit from each roadside unit through the communication link between multiple roadside units, for example, according to the RSU deployment shown in Figure 1(a) In this way, the IoV server can communicate with RSU1, RSU2, and RSU3 respectively. The coverage area information mentioned here may include information on the boundary of the coverage area of the roadside unit. For example, according to the RSU deployment mode shown in FIG. 1(a), the vehicle networking server may obtain the information of the location G and the location H from the RSU1. Alternatively, the coverage area information may include coordinate information (such as latitude and longitude information) of the coverage area of the roadside unit, or information such as identification, number, or index corresponding to the coordinate information.

In addition, it should be understood that, for ease of understanding, this application takes a rectangular coverage area of the roadside unit as an example for description, but this application does not exclude that the coverage area of the roadside unit may include other regular or irregular shapes other than the rectangle.

In the embodiment of the present application, the Internet of Vehicles server may send a V2X message to the Internet of Vehicles terminal through the roadside unit. For example, V2X messages may be warning information. Among them, the early warning information corresponds to the early warning event. Early warning events in this application refer to events that need to be broadcast to IoV terminals through V2X messages, such as construction events, traffic control events, traffic accident events, severe weather or natural disasters that exist in lanes, roads, or routes. The warning information can include the identification of the warning event (such as the number, index or name used to indicate the construction event), the priority information of the warning event, the start and/or end time of the warning event, and the location of the warning event (such as construction event or One or more of the information such as the location of the traffic accident), the information about the impact range of the early warning event, or the lane information occupied by the early warning event.

Specifically, the priority information of the early warning event can be used to indicate whether the early warning event is an emergency event (or a dynamic event) or a non-emergency event (or a static event). For example, an early warning event with a priority reaching (or exceeding) a certain threshold is an emergency event, whereas an early warning event with a priority lower than (or not lower than) the threshold is a non-emergency event. Among them, emergency events can include strong sudden events such as traffic accidents, severe weather or natural disasters; non-emergency events can include construction events, traffic control events, and other unexpected events that are often predictable in advance.

The information on the influence range of the early warning event can be used to indicate the influence range of the warning time. Taking Figure 1(a) as an example, if the area of influence of the early warning event includes the area AB (that is, the area between the position shown by the dotted line A and the position shown by the dotted line B), the information about the area of influence of the early warning event may include the boundary position of the area AB The information, such as the information of the position A and the position B, may include the coordinate information of the area AB, or may include the identification, number, or index corresponding to the coordinate information of the area AB.

As shown in FIG. 2, a communication method provided by an embodiment of the present application can be implemented by a server, a first roadside unit, and a terminal device. The method may include the following steps:

S101: The server determines the first forwarding rule of the warning information. The first forwarding rule may be used to instruct the terminal device receiving the warning information to forward the warning information according to the first forwarding rule.

S102: The server sends the first forwarding rule of the warning information to the first roadside unit. Among them, the first roadside unit is located in the upstream direction of the target area, and the target area is an area where the roadside unit cannot be used for warning.

Among them, the area where the early warning cannot be given by the roadside unit refers to the area where the early warning information broadcast by the roadside unit cannot be received. Specifically, the area where the roadside unit cannot be used for early warning may include an area where the roadside unit cannot broadcast the warning information due to no roadside unit coverage. Alternatively, the area that cannot be used for early warning by the roadside unit may include an area where the roadside unit cannot be broadcasted through the V2X message due to a failure or overload of the roadside unit although it is covered by the roadside unit.

The upstream direction of the target area may include a direction opposite to the allowable direction of the lane, and the lane is a lane included in the road where the target area is located. Among them, the target area may cover part or all of the lanes of the road.

In a possible implementation manner, when the road where the target area is located includes a first lane and a second lane, and the allowable direction of the first lane is different from the allowable direction of the second lane, the upstream The direction includes the opposite direction of the allowable direction of the first lane, and/or the upstream direction includes the opposite direction of the allowable direction of the second lane. For example, as shown in Figure 1(c), when the target area is located in area EF and the target area covers Lane 1 and/or Lane 2, then the road where the target area is located (ie, the road shown in Figure 1(c)) includes Lane 1. And lane 2, and the allowable directions of lane 1 and lane 2 are different. In this case, the upstream direction may include the opposite direction of the allowable direction of lane 1, and/or the upstream direction may include the opposite of the allowable direction of lane 1 direction. Therefore, in this example, RSU1 may be used as the corresponding first roadside unit of the target area EF, and/or RSU5 may be used as the corresponding first roadside unit of the target area EF.

In another possible implementation manner, when the road where the target area is located includes a third lane and the road does not include a lane that is different from the allowable direction of the third lane, the upstream direction includes the The direction opposite to the permitted direction of the third lane.

For example, according to the RSU deployment plan shown in Figure 1(a), when the target area is located in area EF and the target area covers lane 1 and/or lane 2, the road where the target area is located includes lane 1 and lane 2, and lane 1 and lane 2 Lane 2 has the same allowable direction. At this time, the upstream direction includes the opposite direction of the allowable direction of lane 1, or in other words, the upstream direction includes the opposite direction of the allowable direction of lane 2. Therefore, in this example, RSU1 can be used as the corresponding first roadside unit of the target area EF.

For another example, according to the RSU deployment plan shown in Figure 1(b), when the target area is located in the area EF and the target area covers lane 1 and/or lane 2, the road where the target area is located includes lane 1 and lane 2, and lane 1 It is the same as the allowable direction of lane 2. At this time, the upstream direction includes the opposite direction of the allowable direction of lane 1, or in other words, the upstream direction includes the opposite direction of the allowable direction of lane 2. Therefore, in this example, RSU4 can be used as the corresponding first roadside unit of the target area EF.

S103: Correspondingly, the first roadside unit receives the first forwarding rule of the warning information from the server. The first forwarding rule for the first roadside unit to send the warning information.

Specifically, the first roadside unit may broadcast the first forwarding rule of the warning information in the coverage area of the first roadside unit. Alternatively, the first roadside unit may send the first forwarding rule of the warning information to terminal devices in the coverage area of the first roadside unit. For example, the first roadside unit may send the first forwarding rule of the warning information through PC5 or DSRC.

S104: Correspondingly, the terminal device receives the first forwarding rule. After receiving the warning information, the terminal device sends the warning information according to the first forwarding rule.

Using the above method, the terminal device can receive the first forwarding rule from the first roadside unit upstream of the target area, and forward the warning information according to the first forwarding rule, so that the car networking terminal in the target area can receive the warning forwarded by the terminal device Therefore, when V2X messages are forwarded to the target area, they no longer have to pass through the roadside unit covering the target area, which improves the reliability of the early warning information forwarding process.

It should be understood that the above server can be implemented by the Internet of Vehicles server as shown in Figure 1(a), Figure 1(b) or Figure 1(c). The above first roadside unit can be realized by part or all of RSU in RSU1, RSU2 or RSU3 as shown in Figure 1(a), or by part or all of RSU in RSU1, RSU2 or RSU4 as shown in Figure 1(b) Realized, or realized by some or all of the RSUs in RSU1, RSU2, or RSU5 shown in Figure 1(c). The above terminal device can be implemented by the car networking terminal shown in Figure 1(a), Figure 1(b) or Figure 1(c).

The first forwarding rule of the warning information in S101 above may include a first identifier, and the first identifier is used to instruct the terminal device receiving the warning information to forward the warning information. In addition, the terminal device that receives the warning information can also forward the received warning information by default.

Before the implementation of S101, the server may also determine the target area, and determine the first roadside unit according to the target area. Among them, the first roadside unit is located in the upstream direction of the target area.

In a specific example, the target area may be located within the influence range of the early warning event, and the target area is not covered by roadside units. Since the target area is not covered by roadside units, it is not possible to broadcast warning information through roadside units in this area. At this time, the early warning information can be forwarded in the target area through the method described in Figure 2 to improve the reliability of the early warning information forwarding process.

Specifically, according to the range of influence of the early warning event and the coverage area of the roadside units around the range of influence of the early warning event, the area covered by the roadside unit within the range of the early warning event can be determined, and this area is the target area.

Taking Figure 1(a) as an example, if the range of influence of the early warning time is area AB, then according to Figure 1(a) it can be seen that the area DE (ie the area between the position shown by the dotted line D and the position shown by the dotted line E) is located in the area AB If there is no roadside unit covering the area DE, the area DE can be determined as the target area. At this time, the Internet of Vehicles server can use RSU2 as the first roadside unit, and send the first forwarding rule of warning information to RSU2 through S101. In addition, the Internet of Vehicles server can also use RSU1 as the first roadside unit, and send the first forwarding rule of warning information to RSU1 through S101.

It should be understood that when the impact range of the early warning event includes the area where the area AB overlaps with lane 1 as shown in Figure 1(a), the target area may include the area where the area DE overlaps with lane 1; and/or, when the early warning time is When the area of influence includes the area where the area AB overlaps with the lane 2, the target area may include the area where the area DE overlaps with the lane 2.

In addition, following the above example, when the target area is the area DE, if the RSU deployment mode is shown in Figure 1(c), RSU2 and/or RSU5 can be used as the first roadside unit.

In another specific example, the target area may be located within the influence range of the early warning event, and the roadside unit covering the target area does not meet certain conditions. Among them, the specific conditions may include operating state conditions and/or network state conditions. When the running status of the roadside unit covering the target area does not meet the operating status conditions, and/or the network status of the roadside unit does not meet the network status conditions, if the roadside unit still forwards the warning information in the target area, it may cause The early warning information cannot be forwarded or cannot be forwarded in time, so the coverage area of the roadside unit that does not meet certain conditions can be used as the target area that cannot be used for early warning by the roadside unit. At this time, the early warning information can be forwarded in the target area by the method described in Figure 2 to improve the reliability of the early warning information forwarding. Exemplarily, the first roadside unit satisfies the specific condition.

Specifically, the coverage area of the roadside unit that does not meet the specific conditions can be used as the target area.

Still taking Fig. 1 as an example, the area of influence of the early warning event is area AB. If the IoV server determines that RSU2 does not meet certain conditions, the IoV server can set the overlap area EB between area AB and the area EF covered by RSU2 (that is, the dotted line E). The area between the indicated position and the position indicated by the dashed line B) as the target area. At this time, if according to Figure 1(a), the Internet of Vehicles server can use RSU1 upstream of RSU2 as the first roadside unit; if according to Figure 1(b), the Internet of Vehicles server can use RSU4 upstream of RSU2 as the first roadside unit. One road side unit; according to Figure 1(c), the car networking server can use RSU5 and/or RSU1 upstream of RSU2 as the first road side unit.

It should be understood that the above target area may also be a collection of areas not covered by roadside units within the influence range of the early warning event and areas not covered by roadside units that meet specific conditions. For example, as shown in Figure 1(a), the area of influence of the early warning event is area AB. If area DE has no roadside unit coverage, and the RSU2 of the coverage area EB does not meet certain conditions, the car networking server can target area DE and area EB area. At this time, the Internet of Vehicles server can use RSU1 as the first roadside unit, and send the first forwarding rule of warning information to RSU1 through S101.

In a possible example, the server may determine that the roadside unit does not meet the operating state conditions according to the operating state information of the roadside unit. Among them, the operation status information of the roadside unit may include information about the message types supported by the roadside unit for forwarding, the number of concurrent messages supported by the roadside unit, the current number of concurrent messages of the roadside unit, the buffering capability information of the roadside unit, or the roadside unit Part or all of the information in the current buffered message number of the unit.

Among them, the information of the message type that the roadside unit supports forwarding can be used to indicate whether the roadside unit supports the forwarding of warning information. When the roadside unit does not support the forwarding of the warning information, the server determines that the roadside unit does not meet the operating state conditions.

The number of concurrent messages supported by the roadside unit can be used to indicate the number of concurrent messages supported by the roadside unit. Exemplarily, when the number of concurrent messages supported by the roadside unit does not reach (or exceeds) the threshold of the number of concurrent messages supported by the roadside unit, the server determines that the roadside unit does not meet the operating state condition. The current number of concurrent messages of the roadside unit can be used to indicate the current number of concurrent messages of the roadside unit. Exemplarily, when the current number of concurrent messages of the roadside unit does not reach (or exceeds) the threshold of the current number of concurrent messages of the roadside unit, the server determines that the roadside unit does not meet the operating state condition. In addition, the server may also combine the number of concurrent messages supported by the roadside unit and the current number of concurrent messages of the roadside unit to determine whether the roadside unit meets the operating state conditions.

For example, when the current number of concurrent messages of the roadside unit reaches (or exceeds) 70% (or other values, such as 80%) of the number of concurrent messages supported by the roadside unit, the roadside unit's warning information for non-emergency events can be restricted Forwarding, but only forwarding the warning information of emergency events. At this time, when the pre-warning information of non-emergency events needs to be forwarded in the coverage area of the roadside unit, the server can mark the roadside unit as not meeting the operating state conditions; and when it needs to be in the coverage area of the roadside unit When forwarding the warning information of non-emergency events, the server may not mark the roadside unit as not meeting the operating state conditions. For another example, when the current number of concurrent messages of the roadside unit reaches (or exceeds) 80% (or other values, such as 90%) of the number of concurrent messages supported by the roadside unit, the roadside unit will not perform warning information on any warning events. Forward. When it is necessary to forward early warning information of emergency or non-emergency events within the coverage area of the roadside unit, the server can mark the roadside unit as not meeting the operating state conditions.

The buffering capability information of the roadside unit can be used to indicate the number of messages that the roadside unit supports buffering. Exemplarily, when the number of messages supported by the roadside unit for buffering does not reach (or exceeds) the threshold for the number of messages supported by the roadside unit for buffering, the server determines that the roadside unit does not meet the operating state condition. The current number of messages buffered by the roadside unit can be used to indicate the number of messages currently buffered by the roadside unit. Exemplarily, when the number of messages currently buffered by the roadside unit does not reach (or exceeds) the threshold value of the number of messages currently buffered by the roadside unit, the server determines that the roadside unit does not meet the operating state condition. The server may also combine the number of messages that the roadside unit supports to buffer and the number of messages currently buffered by the roadside unit to determine whether the roadside unit meets the operating state conditions.

For example, when the number of messages currently buffered by the roadside unit reaches (or exceeds) 70% (or other values, such as 80%) of the number of messages buffered by the roadside unit, the roadside unit can be restricted from responding to non-emergency events. The early warning information is forwarded, and only the emergency warning information is forwarded. At this time, when the pre-warning information of non-emergency events needs to be forwarded in the coverage area of the roadside unit, the server can mark the roadside unit as not meeting the operating state conditions; and when it needs to be in the coverage area of the roadside unit When forwarding the warning information of non-emergency events, the server may not mark the roadside unit as not meeting the operating state conditions. For another example, when the number of messages currently buffered by the roadside unit reaches (or exceeds) 80% (or other values, such as 90%) of the number of messages that the roadside unit supports buffering, the roadside unit does not warn any warning event Information is forwarded. When it is necessary to forward early warning information of emergency or non-emergency events within the coverage area of the roadside unit, the server can mark the roadside unit as not meeting the operating state conditions.

In another possible example, the server may also determine that the roadside unit does not meet the network status condition according to the network status information of the roadside unit. Wherein, the network status information of the roadside unit may include information for indicating the load status of the short-range communication network of the roadside unit (such as load information of the roadside unit), and/or for indicating the short-range communication of the roadside unit Network quality information (such as the downlink network quality information of the roadside unit).

In another possible example, the server may also determine that the roadside unit does not meet the specific condition according to the instruction information sent by the roadside unit. Among them, the indication information can be used to indicate that the roadside unit does not meet the performance status condition and/or the network status condition. The indication information may include the identification of the roadside unit. The above indication information may be sent to the server after the roadside unit determines that it does not meet the performance status condition and/or the network status condition. The way the roadside unit determines that it does not meet the performance state condition and/or the network state condition may refer to the manner in which the server determines that the roadside unit does not meet the performance state condition and/or the network state condition.

In implementation, the server can subscribe to one or more roadside units managed by it to one or more of the above operating status information, network status information or indication information. Still taking Figure 1(a) as an example, the Internet of Vehicles server can send a subscription request to RSU1, and the subscription request can be used to subscribe to one or more of the operating status information or network status information of RSU1. The above information reported to determine whether RSU1 meets specific conditions. Taking the operating status information as an example, the Internet of Vehicles server can instruct RSU1 to periodically report the operating status information of RSU1. At this time, the subscription request can carry the period or information indicating the period. Alternatively, the subscription request may be used to instruct the RSU1 to report the operating state information after the operating state meets the operating state threshold. At this time, the subscription request may also be used to indicate the operating state threshold. For example, when the number of messages currently cached by RSU1 reaches the threshold for the number of cached messages, RSU1 may report the number of currently cached messages to the server.

One or more roadside units can also report the above operating status information and/or network status information to the server periodically or after meeting the operating status threshold, or one or more roadside units can send it after determining that they do not meet certain conditions Instruction information without the server sending a subscription request. Wherein, the reporting period and/or the operating state threshold may be indicated by the server, or determined through a protocol or a pre-configured manner.

In addition, the subscription request can be used to instruct RSU1 to send instruction information to the Internet of Vehicles server after determining that it does not meet specific conditions. At this time, the subscription request can also be used to indicate the specific condition. For example, the subscription request may indicate the downlink network quality threshold. After determining that its downlink network quality does not meet the downlink network quality threshold, RSU1 may send indication information to the Internet of Vehicles server. The indication information may be used to indicate that RSU1 does not meet the network status conditions. The indication information can carry the downlink network quality information of RSU1, such as the measured values in the lower row and so on.

In implementation, when RSU1 reports operating status information, network status information or indication information to the Internet of Vehicles server, it can also report the identification of RSU1.

It should be understood that before the implementation of S101, the server may send a subscription request to the roadside unit before determining the first forwarding rule corresponding to the warning information, and according to one or more of the network status information or indication information reported by the roadside unit It is judged whether the roadside unit satisfies a specific condition, and then the judgment result is stored. Therefore, when determining the first forwarding rule, it can be determined according to the judgment result whether there is a roadside unit that does not meet a specific condition within the management range of the early warning event.

Exemplarily, the Internet of Vehicles server shown in Figure 1(a) can maintain the list shown in Table 1 to facilitate the recording of the judgment results of whether each roadside unit meets specific conditions and the coverage area information of the roadside unit. This list can facilitate the determination of whether there are roadside units that do not meet specific conditions within the impact range of the early warning event, and the determination of the target area.

Table 1

According to Table 1, if the area AB is the impact area of the early warning event, the Internet of Vehicles server can determine that the roadside units RSU1 and RSU2 overlap with the area AB according to the coverage area of the roadside units in Table 1, and further according to whether the roadside units meet the specific requirements In the first column of conditions, it is determined that RSU2 does not meet specific conditions. After that, the car networking server can determine the overlapping area EB as the target area according to the coverage area EF and area AB of RSU2.

Exemplarily, when the first roadside unit is determined according to the position of the target area, the first roadside unit in the upstream direction of the target area may be determined as the first roadside unit. In other words, the first roadside unit may be the roadside unit closest to the target area in the upstream direction of the target area. Adopting this design can improve the forwarding efficiency of the first forwarding rule and save signaling overhead. For example, as shown in Figure 1(a), for the road shown in Figure 1, if the target area is the area EB, the first roadside unit RSU1 in the upstream direction of the area EB can be determined as the first roadside unit . For another example, for the RSU deployment method shown in FIG. 1(a), if the target area is the area DE, the first roadside unit RSU2 in the upstream direction of the area DE can be determined as the first roadside unit. For another example, for the RSU deployment method shown in Figure 1(c), if the target area is the area DE, the roadside unit RSU2 in the upstream direction of the area DE and the RSU closest to the area DE in the RSU5 can be determined as the first One side unit. Among them, when determining the RSU in RSU2 and RSU5 that is closest to the area DE, the distance L1 between the location of RSU2 and the location E can be compared with the distance L2 between the location of RSU5 and the location D. If L1 is greater than L2, RSU5 can be used as the first path Side unit; if L1 is less than L2, RSU2 can be used as the first roadside unit; if L1 is equal to L2, either RSU2 or RSU5 can be used as the first roadside unit.

The following describes several ways of determining the first forwarding rule according to the location of the target area provided by the embodiments of the present application by way of examples.

Manner 1: When the first forwarding rule includes the first time information, the server can determine the first time information according to the coverage area of the first roadside unit, the range of the target area, and the vehicle speed information, and the first time information can be used to instruct the terminal device to forward The start time and/or end time of the warning message.

Among them, the above vehicle speed information is used to indicate the vehicle speed of the vehicle to which the terminal device belongs. The vehicle speed information may be the average vehicle speed, the maximum speed limit or the minimum speed limit of the current road. The vehicle speed information can be configured locally on the server, or reported to the server by the roadside unit deployed on the current road.

Still taking Figure 1(a) as an example, assuming that the target area is area EB, the car networking server can determine the distance between the boundary position H of RSU1 and the boundary position B of area EB according to the area GH and area EB covered by RSU1, According to the distance and vehicle speed information, the time required for the vehicle to travel from position H to position B can be determined, that is, after the time period for receiving the first forwarding rule reaches this length, the first Internet of Vehicles terminal can start to forward the warning information, so the first The start time of the vehicle networking terminal forwarding warning information.

Alternatively, the distance between the boundary position G of the RSU1 and the boundary position B of the area EB can also be determined according to the area GH and the area EB covered by RSU1. According to the distance and the vehicle speed information, it can be determined that the vehicle travels from the position G to the position B. The time required, that is, after the time period for receiving the first forwarding rule reaches this time period, the first Internet of Vehicles terminal can start to forward the warning information. Optionally, the Internet of Vehicles server may determine the start time for the first Internet of Vehicles terminal to forward the warning information according to the maximum speed limit or average vehicle speed of the current road.

In addition, following the above example, the Internet of Vehicles server can determine the distance between the boundary position H of RSU1 and the boundary position E of the area EB according to the area GH and area EB covered by RSU1. According to the distance and vehicle speed information, the vehicle can be determined from The time required for the location H to travel to the location E, that is, after the time period for receiving the first forwarding rule reaches this time period, the first Internet of Vehicles terminal ends to forward the warning information, so the end time for the first Internet of Vehicles terminal to forward the early warning information can be determined. Optionally, the Internet of Vehicles server may determine the start time for the first Internet of Vehicles terminal to forward the warning information according to the minimum speed limit or average vehicle speed of the current road.

Manner 2: When the first forwarding rule includes location information, the server can determine the location information according to the coverage area of the first roadside unit and the range of the target area, and the location information can be used to indicate the start position and/or end of the terminal device forwarding the warning information position.

Still taking Fig. 1(a) as an example, assuming that the target area is the area EB, the car networking server can determine the distance between the boundary position H of the RSU1 and the boundary position B of the area EB according to the area GH and the area EB covered by the RSU1. Since the first forwarding rule is received, after the driving distance of the vehicle where the first Internet of Vehicles terminal is located reaches this distance, the first Internet of Vehicles terminal can start to send the warning information, and the distance is the starting position of the Internet of Vehicles terminal to forward the early warning information.

Alternatively, the distance between the boundary position G of the RSU1 and the boundary position B of the area EB may also be determined according to the area GH and the area EB covered by the RSU1. Since the first forwarding rule is received, after the driving distance of the vehicle where the first Internet of Vehicles terminal is located reaches this distance, the first Internet of Vehicles terminal can start to send the warning information, and the distance is the starting position of the Internet of Vehicles terminal to forward the early warning information.

In addition, following the above example, the Internet of Vehicles server can determine the distance between the boundary position H of the RSU1 and the boundary position E of the area EB according to the area GH and the area EB covered by the RSU1. After receiving the first forwarding rule, after the driving distance of the vehicle where the first Internet of Vehicles terminal is located reaches this distance, the first Internet of Vehicles terminal can end sending the warning information, and this distance is the end position of the Internet of Vehicles terminal forwarding the early warning information.

It should be understood that the above method 1 and method 2 can be implemented separately. For example, the Internet of Vehicles server may determine the first time information according to the method 1, and carry the first time information in the first forwarding rule. The above method 1 and method 2 can also be implemented in combination. For example, the Internet of Vehicles server can determine the first time information used to indicate the start time of the first Internet of Vehicles terminal to forward the warning information according to the method 1, and determine the first time information used to indicate the second method according to the method 2. A car networking terminal forwards the location information of the starting position of the warning information, and carries the first time information and the location information in the first forwarding rule.

Exemplarily, the first forwarding rule involved in S101 may further include a forwarding frequency, which is used to indicate the frequency of the terminal device when forwarding the warning information, for example, the forwarding frequency is 10 seconds (s), 30 seconds, or 60 seconds. Among them, the forwarding frequency can be set by the server according to the priority information of the early warning event, and a higher forwarding frequency can be set for more urgent early warning events.

The first forwarding rule may further include a forwarding priority, which is used to indicate the priority when the terminal device forwards multiple warning messages. For example, when there are multiple warning messages that need to be forwarded by the terminal device, the terminal device may preferentially send the warning information with a higher forwarding priority. The forwarding priority of the warning information can be set by the server according to the priority information of the warning event, for example, the forwarding priority is the same as the priority of the estimated time.

In the implementation of S101, the first forwarding rule of the warning information may carry the identifier of the warning information, or the first forwarding rule of the warning information and the warning information may be carried in the same message for transmission. Thus, the pre-warning information can be associated with the first forwarding rule.

In this embodiment of the application, the server may also instruct the first roadside unit to send the start time and/or end time of the first forwarding rule through S103. Specifically, before S103, the server may also send second time information to the first roadside unit, and the second time information may be used to indicate the start time and/or end time for the first vehicle networking terminal to send the first forwarding rule. Therefore, the first roadside unit can send the first forwarding rule according to the start time and/or end time indicated by the second time information. The server may determine the second time information according to the start time and/or end time of the early warning event after determining that the type of the early warning event is a non-emergency event.

In a possible example, when determining the second time information, the server may determine the start time of the warning event as the start time when the first roadside unit sends the first forwarding rule, and/or the server may determine the warning The end time of the event sends the end time of the first forwarding rule. Alternatively, the server may use the first specific time point before the start time of the warning event as the start time for the first Internet of Vehicles terminal to send the first forwarding rule, where the time difference between the first specific time point and the start time of the warning event is the first One duration, the value of the first duration may be a set value, or determined by the server according to the network status of the first roadside unit. The worse the network status of the first roadside unit, the longer the first duration. Alternatively, the server may use the second specific time point before the end time of the warning event as the end time for the first Internet of Vehicles terminal to send the first forwarding rule, where the time difference between the second specific time point and the start time of the warning event is the first Two durations. The value of the second duration can be a set value or determined by the server according to the network status of the first roadside unit. The worse the network status of the first roadside unit, the shorter the second duration. Alternatively, the server may use a third specific time point after the end time of the warning event as the end time of the first forwarding rule sent by the first Internet of Vehicles terminal, where the time difference between the third specific time point and the start time of the warning event is the first Three hours, the value of the third period can be a set value or determined by the server.

In addition, the server may also instruct the first roadside unit to send the first forwarding rule through S103 immediately after receiving the first forwarding rule. Specifically, before S103, the server may send a second identifier to the first roadside unit, where the second identifier is used to indicate that the first roadside unit starts to forward the first forwarding rule since receiving the first forwarding rule. In other words, the second identifier is used to indicate that the first roadside unit sends the first forwarding rule immediately after receiving the first forwarding rule. The server may send the second identifier to the first roadside unit after determining that the type of the early warning event is an emergency event.

The following still takes FIG. 1(a) as an example, and introduces the communication method provided by the embodiment of the present application in conjunction with the process shown in FIG. 3. The communication method may include the following steps:

S201: The Internet of Vehicles server sends subscription requests to RSU1, RSU2, and RSU3 respectively. Among them, this application does not limit the time sequence of the vehicle networking server sending subscription requests to RSU1, RSU2, and RSU3, respectively. Correspondingly, RSU1, RSU2, and RSU3 receive subscription requests respectively.

Wherein, the subscription request is used to instruct RSU1 to report at least one of operating status information, network status information, or indication information of RSU1 to the Internet of Vehicles server. Among them, the operating status information can be used by the Internet of Vehicles server to determine whether RSU1 meets the operating status conditions. The network status information can be used by the car networking server to determine whether the RSU1 meets the network status conditions. The indication information can be used to indicate that the RSU1 does not meet the operating status conditions and/or the network status conditions.

S202: After the RSU2 judges that it does not meet the operating network status condition, it sends the RSU2 identifier and indication information to the Internet of Vehicles server, where the indication information is used to indicate that the RSU2 does not meet the operating network status condition. Correspondingly, the Internet of Vehicles server receives the identification of RSU2 and the indication information.

S203: The Internet of Vehicles server records RSU2 as a roadside unit that does not meet specific conditions.

Exemplarily, if the Internet of Vehicles server stores the list as shown in Table 1, the Internet of Vehicles server can refresh the table and configure the item of "whether the roadside unit meets specific conditions" corresponding to ID_RSU2 to "No".

S204: When an early warning event that requires an early warning occurs, the RSU1 reports the information of the early warning event to the Internet of Vehicles server. Correspondingly, the Internet of Vehicles server receives the information of the early warning event reported by RSU1. The message of the warning event may include warning information corresponding to the warning event.

Among them, RSU1 can report the warning event information to the Internet of Vehicles server through RSI messages.

Exemplarily, RSU1 can report the identification of the early warning event to the Internet of Vehicles server, and the Internet of Vehicles server determines whether the early warning event is an emergency or non-emergency according to the identification of the early warning event, that is, the Internet of Vehicles server determines the early warning event according to the identification of the early warning event. Priority information. Alternatively, the RSU1 may determine whether the type of the early warning event is an emergency event or a non-emergency event according to the identifier of the early warning event, and send the priority information of the early warning event to the car networking server device. In addition, the information of the early warning event can also be reported by RSU2 or RSU3 or other roadside units or processing equipment.

S205: The Internet of Vehicles server determines the coverage area of the RSU2 as the target area, and configures the first forwarding rule of the warning information.

It should be understood that the first forwarding rule may include an identifier of the warning information to indicate the warning information with the identifier. Alternatively, the first forwarding rule may include priority information of an early warning event to indicate early warning information corresponding to an early warning event of a certain priority. Exemplarily, the first forwarding rule may include one or more of the first identifier, first time information, location information, forwarding frequency, or forwarding priority.

In S205, the Internet of Vehicles server can execute one or more of the following configurations to implement the configuration of the first forwarding rule:

First, the vehicle networking server configures the first identification. The first identifier is used to instruct the car networking terminal to forward the warning information according to the first forwarding rule.

Second, when the early warning event is a non-emergency event, the IoV server can determine the first time information and/or location information of the IoV terminal to forward the early warning information according to the location of the target area. Specifically, when determining the first time information of the vehicle networking terminal forwarding the warning information, the first time information may be determined according to the coverage area of the RSU1 located in the upstream direction of the target area, the range of the target area, and the vehicle speed information. When determining the location information of the vehicle networking terminal forwarding the warning information, the location information can be determined according to the coverage area of the RSU1 located in the upstream direction of the target area and the range of the target area.

Third, the car networking server configures the forwarding frequency and/or forwarding priority of the warning information.

It should be understood that the Internet of Vehicles server may execute at least two of the above configurations sequentially or simultaneously.

In addition, when the early warning event is a non-emergency event, the Internet of Vehicles server can also configure second time information, which can be used to indicate the start time and/or end of the first forwarding rule sent by the RSU1 located in the upstream direction of the target area time.

S206: The Internet of Vehicles server sends the first forwarding rule of the warning information to the RSU1 located in the upstream direction of the target area. Correspondingly, RSU1 receives the first forwarding rule.

Exemplarily, the Internet of Vehicles server may also send the warning information to RSU1. Among them, the warning information and the first forwarding rule of the warning information may be carried in the same message, or carried in different messages.

Exemplarily, when the early warning event is an emergency event, the Internet of Vehicles server may also send a second identifier to RSU1, where the second identifier is used to instruct RSU1 to immediately send the first forwarding rule of early warning information. Or, when the early warning event is a non-emergency event, the Internet of Vehicles server may also send the second time information to RSU1. Wherein, the second time information and the first forwarding rule of the warning information may be carried in the same message, or carried in different messages.

S207: The first forwarding rule for the RSU1 to send the warning information. Correspondingly, the first Internet of Vehicles terminal in the coverage area of RSU1 receives the first forwarding rule of the warning information.

Specifically, RSU1 broadcasts the first forwarding rule for sending the warning information. Alternatively, the RSU1 sends the first forwarding rule of the warning information to the first Internet of Vehicles terminal in the coverage area of the RSU1 in a directional manner.

Exemplarily, if RSU1 also receives the warning information from the Internet of Vehicles server, RSU1 may also send the warning information. Among them, the warning information and the first forwarding rule of the warning information may be carried in the same message, or carried in different messages.

In a specific example of S207, when RSU1 also receives the second identifier from the Internet of Vehicles server, RSU1 immediately sends the first forwarding rule after receiving the first forwarding rule, where the second identifier is used to indicate the roadside The unit immediately forwards the first forwarding rule of the warning information.

In another specific example of S207, when RSU1 also receives the second time information from the Internet of Vehicles server, after receiving the first forwarding rule, RSU1 performs the process according to the start time and/or end time indicated by the second time information. Sending of the first forwarding rule.

S208: The first Internet of Vehicles terminal sends the warning information according to the first forwarding rule. Among them, the first Internet of Vehicles terminal can also receive the early warning information from RSU1.

In a specific example of S208, the first Internet of Vehicles terminal may send the warning information according to the received first forwarding rule by default. At this time, regardless of whether the first forwarding rule carries the first identifier, the first Internet of Vehicles terminal All can send the warning information according to the first forwarding rule.

In another specific example of S208, only after determining that the first forwarding rule includes the first identifier, the first Internet of Vehicles terminal sends the warning information according to the first forwarding rule.

Correspondingly, the second Internet of Vehicles terminal located in the target area can receive the warning information sent by the first Internet of Vehicles terminal.

According to the above process, the early warning information can be forwarded to the second Internet of Vehicles terminal in the target area through the first Internet of Vehicles terminal.

In the implementation of this application, the Internet of Vehicles server can also send the second forwarding rule of warning information to the third roadside unit, and the third roadside unit can send the second forwarding rule of warning information within its coverage area. The forwarding rule may include a third identifier, and the third identifier may be used to indicate that the car networking terminal receiving the second forwarding rule of the warning information does not forward the warning information. Specifically, the third roadside unit may be located within the influence range of the early warning event. For example, the third roadside unit may include RSU3 as shown in FIG. 1(a). In addition, the third roadside unit can meet certain conditions. For the setting method of the specific conditions, please refer to the foregoing introduction, and the Internet of Vehicles server may determine whether the third roadside unit meets the specific conditions according to the foregoing method.

Exemplarily, the third roadside unit is located within the influence range of the early warning event and located in the downstream direction of the target area. Among them, the downstream direction is the opposite direction of the upstream direction, in other words, the upstream direction is the allowable direction of the lane, where the lane is the lane included in the road where the target area is located. At this time, the vehicle-mounted terminal in the coverage area of the third roadside unit is not required to forward the warning information.

Using the above method, the Internet of Vehicles server can send a second forwarding rule to the Internet of Vehicles terminals in the coverage area of the roadside unit through the roadside unit to clearly indicate that the Internet of Vehicles terminals that do not need to receive the warning information forward the warning information, thereby Save signaling overhead. In addition, the car networking terminal that receives the early warning information may also not forward the received early warning information by default. Or, if the car networking terminal does not forward the received warning information by default, or the car networking terminal forwards the received warning information by default, the car networking terminal may receive the second forwarding rule of the warning information according to the first 2. The third identifier in the forwarding rule does not forward the warning information.

When the Internet of Vehicles server instructs the Internet of Vehicles terminal not to forward the early warning information through the second forwarding rule of the warning information, the process shown in FIG. 3 may further include the following steps after the step shown in S204:

S209: The second forwarding rule of the car networking server sending the warning information to the RSU3. Correspondingly, RSU3 receives the second forwarding rule of the warning information.

The second forwarding rule may include a third identifier, and the third identifier is used to instruct the car networking terminal receiving the warning information not to forward the warning information. The warning information may be reported by RSU1 in the step shown in S204.

It should be understood that the second forwarding rule includes the identifier of the warning information to indicate the warning information with the identifier. Alternatively, the second forwarding rule may include priority information of an early warning event to indicate the early warning information corresponding to an early warning event of a certain priority (eg, emergency or non-urgent).

Exemplarily, the Internet of Vehicles server may also send third time information to RSU3, and the third time information may be used to indicate the start time and/or end time of the second forwarding rule for RSU3 to send the warning information. For the configuration method of the third time information, refer to the introduction when the vehicle networking server configures the second time information. Alternatively, the Internet of Vehicles server may also send a four identifier to RSU3, and the fourth identifier may be used to instruct the third roadside unit to start sending the second forwarding rule of the warning information after receiving the second forwarding rule of the warning information.

Exemplarily, the above RSU3 may be located within the influence range of the early warning event. Further, the above RSU3 may be located within the influence range of the early warning event and located in the downstream direction of the target area.

S210: The second forwarding rule for the RSU3 to send the warning information. Correspondingly, the car networking terminal in the coverage area of RSU3 receives the second forwarding rule of the warning information.

Exemplarily, if the Internet of Vehicles server also sends the third time information to RSU3, RSU3 may send the second forwarding rule according to the third time information. By adopting this method, the RSU3 can be made to send the second forwarding rule according to the indicated time, avoiding the second forwarding rule that the RSU3 always forwards the warning information to save the signaling overhead.

In addition, if the Internet of Vehicles server also sends the four identifier to RSU3, RSU3 can immediately send the second forwarding rule after receiving the second forwarding rule. By adopting this method, the RSU3 can be made to send the second forwarding rule in time, avoiding the car networking terminal in the coverage area of the RSU3 from forwarding the warning information, so as to save the signaling overhead.

S211: The car networking terminal in the coverage area of RSU3 does not forward the warning information after receiving the warning information according to the third identifier in the second forwarding rule.

Based on the same technical concept as the above method embodiment, an embodiment of the present application also provides a communication device, which may include the server, the first roadside unit, the second roadside unit, and the third roadside unit in the above method embodiment. The function of any one of the roadside unit or the terminal device can be used to execute any one of the server, the first roadside unit, the second roadside unit, the third roadside unit, or the terminal device provided by the above method embodiment step. This function can be realized by hardware, or by software or hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible implementation manner, the communication device 400 shown in FIG. 4 can be used as a server involved in the foregoing method embodiment, and executes the steps performed by the server in the foregoing method embodiment. As shown in Fig. 4, the communication device 400 may include a communication module 401 and a processing module 402, and the communication module 401 and the processing module 402 are coupled with each other. The communication module 401 may be used to support the communication device 400 to communicate. The communication module 401 may have a wired communication function, for example, it can communicate with the roadside unit in a wired manner. The processing module 402 can be used to support the communication device 400 to perform the processing actions in the above method embodiments, including but not limited to: generating information and messages sent by the communication module 401, and/or demodulating the signals received by the communication module 401 Decoding and so on.

When executing the steps performed by the server in the above method embodiment, the processing module 402 may be used to determine a first forwarding rule of the warning information, and the first forwarding rule is used to instruct the terminal device that receives the warning information according to the first forwarding rule. The forwarding rule sends the warning information. The communication module 401 may be configured to send the first forwarding rule to the first roadside unit. Wherein, the first roadside unit is located in the upstream direction of the target area, the upstream direction is the opposite direction of the lane allowed to pass, the lane is the lane included in the road where the target area is located, and the target area is not The area for early warning through the roadside unit.

When the first forwarding rule includes the first time information, the processing module 402 may also be configured to determine the first time information according to the coverage area of the first roadside unit, the range of the target area, and vehicle speed information The vehicle speed information is used to indicate the vehicle speed of the vehicle to which the terminal device belongs.

When the first forwarding rule includes the location information, the processing module 402 may also be configured to determine the location information according to the coverage area of the first roadside unit and the range of the target area.

In a possible example, if the target area is within the influence range of the early warning event corresponding to the early warning information, and the second roadside unit covering the target area does not meet a specific condition, the specific condition includes operating State condition, the processing module 402 may also be configured to determine that the second roadside unit does not meet the operating state condition according to the operating state information of the second roadside unit. Wherein, the operating state information of the second roadside unit includes some or all of the following information: information about the message types that the second roadside unit supports forwarding; or, the concurrency supported by the second roadside unit The number of messages; or, the current number of concurrent messages of the second roadside unit; or, the buffering capability information of the second roadside unit; or, the current number of messages buffered by the second roadside unit.

In another possible example, if the target area is within the influence range of the early warning event corresponding to the early warning information, and the second roadside unit covering the target area does not meet a specific condition, the specific condition includes According to the network state condition, the processing module 402 may also be configured to determine that the second roadside unit does not satisfy the network state condition according to the network state information of the second roadside unit. Wherein, the network status information of the second roadside unit includes some or all of the following information: information used to indicate the load status of the short-distance communication network of the second roadside unit; or, used to indicate all Information about the quality of the short-distance communication network of the second roadside unit.

Optionally, the communication module 401 may be further configured to: send second time information to the first roadside unit, where the second time information is used to instruct the first roadside unit to send the first forwarding rule Or send a second identifier to the first roadside unit, where the second identifier is used to indicate that the first roadside unit has received the first forwarding rule, Start forwarding the first forwarding rule.

The communication module 401 may also be configured to send a second forwarding rule of the warning information to a third roadside unit, where the second forwarding rule includes a third identifier, and the third identifier is used to indicate the receiver of the warning information The terminal device does not forward the warning information.

The communication module 401 may be further configured to: send third time information to the third roadside unit, where the third time information is used to indicate the start time of the third roadside unit sending the second forwarding rule and / Or end time; or, send a fourth identifier to the third roadside unit, where the fourth identifier is used to indicate that the third roadside unit starts to send the second forwarding rule after receiving the second forwarding rule The second forwarding rule. The above third roadside unit may be located in a downstream direction of the target area, where the downstream direction is a lane allowing passage, and the lane is a lane included in the road where the target area is located. In other words, the downstream direction is opposite to the upstream direction.

The communication module 401 can also be used to send a subscription request to the roadside unit, and receive one or more of the running status information, network status information or indication information of the roadside unit sent by the roadside unit. The processing module 402 may also determine whether the roadside unit does not meet a specific condition according to one or more of the operation status information, network status information, or indication information of the roadside unit.

In addition, when the communication device shown above is implemented by hardware components, the communication device may include a communication interface and a processor. Among them, the communication interface can be used for communication with the communication device. The processor can be used to read and call the program stored in the memory to execute the steps executed by the server in the above method implementation. In addition, the communication device may further include a memory coupled with the processor for storing the above-mentioned program. Exemplarily, the processor may be used to read and call a program stored in the memory, and execute the above steps executed by the processing module 402. The communication interface may be used to perform the steps performed by the communication module 401 above.

Exemplarily, when the steps executed by the server in the foregoing method embodiments are executed, the structure of a communication device provided in an embodiment of the present application may be as shown in FIG. 5. According to FIG. 5, the communication device 500 may include at least one processor 501, a communication bus 502, a memory 503, and at least one communication interface 504. The communication device 500 may be a general-purpose computer or server or a dedicated computer or server.

The processor 501 may be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the execution of the program of this application. integrated circuit. The processor 501 may be used to execute the steps performed by the processing module 402 above.

The communication bus 502 may include a path for transferring information between the aforementioned components.

The communication interface 504 may be any transceiver or IP port or bus interface, etc., used to communicate with internal or external equipment or devices or communication networks, such as Ethernet, radio access network (RAN), and wireless local area network ( wireless local area networks, WLAN) etc. For example, when the device is a functional unit integrated in the vehicle, the communication interface 504 includes one or more of the following interfaces, such as a transceiver for communicating with the vehicle's external network, and a bus interface for communicating with other internal units of the vehicle (such as a controller area network). (Controller Area Network, CAN) bus interface) and so on. The communication interface 504 may be used to perform the steps performed by the communication module 401 above.

The memory 503 can be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions The dynamic storage device can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this. The memory can exist independently and is connected to the processor through a bus. The memory can also be integrated with the processor.

Wherein, the memory 503 is used to store application program codes for executing the solutions of the present application, and the processor 501 controls the execution. The processor 501 is configured to execute the application program code stored in the memory 503, so as to realize the functions of the car enterprise server, the car networking server or various certificate servers in the method of the present patent.

In a specific implementation, as an embodiment, the processor 501 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 5.

In a specific implementation, as an embodiment, the communication device 500 may include multiple processors, such as the processor 501 and the processor 508 in FIG. 5. Each of these processors can be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor. The processor here may refer to one or more devices, circuits, and/or processing cores for processing data (for example, computer program instructions).

In a specific implementation, as an embodiment, the communication apparatus 500 may further include an output device 505 and an input device 506. The output device 505 communicates with the processor 501 and can display information in a variety of ways. For example, the output device 505 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait. The input device 506 communicates with the processor 501 and can accept user input in various ways. For example, the input device 506 may be a mouse, a keyboard, a touch screen device, or a sensor device.

When the device shown in FIG. 5 is a chip, the function/implementation process of the communication interface 504 can also be realized by pins or circuits. The memory is a storage unit in the chip, such as a register, a cache, etc. The storage unit may also be a storage unit located outside the chip.

Exemplarily, the communication module 401 described in FIG. 4 above may be constituted by the communication interface 504 shown in FIG. 5. The processing module 402 described in FIG. 4 may be composed of a processor 501 and a memory 503.

As shown in FIG. 6, an embodiment of the present application also provides a communication device 600, which can be used to perform the operations performed by the first roadside unit, the second roadside unit, or the third roadside unit in the above method embodiments. step. As shown in FIG. 6, the communication device 600 may include a communication module 601 and a processing module 602. The above communication module 601 and processing module 602 are coupled with each other. The communication module 601 may be used to support the communication device 600 to communicate. The communication module 601 may have a wired communication function, for example, it can communicate with the above server in a wired manner. And/or, the communication module 601 may have a wireless communication function, such as being able to communicate with a terminal device through a PC5 or DSRC method. The processing module 602 can be used to support the communication device 600 to perform the processing actions in the foregoing method embodiments, including but not limited to: generating information and messages sent by the communication module 601, and/or demodulating the signals received by the communication module 601 Decoding and so on.

When performing the steps performed by the first roadside unit in the above method embodiment, the communication module 601 may be used to receive a first forwarding rule of the warning information from the server, and the first forwarding rule is used to instruct the terminal that receives the warning information The device sends the warning information according to the first forwarding rule. The communication module 601 may also be used to send the first forwarding rule. Wherein, the communication device 600 may be located in the upstream direction of the target area, the upstream direction is the opposite direction of the lane allowed to pass, the lane is a lane included in the road where the target area is located, and the target area is a non-passable lane. The area where the roadside unit is warned.

The communication module 601 may also be configured to receive second time information from the server, and send the first forwarding rule according to the second time information, where the second time information is used to instruct the communication device 600 Send the start time and/or end time of the first forwarding rule.

The communication module 601 may also be configured to receive a third identifier from the server, and according to the third identifier, start to forward the first forwarding rule after receiving the first forwarding rule.

The communication module 601 may be specifically configured to broadcast the first forwarding rule and/or send the first forwarding rule to terminal devices in the coverage area of the communication device 600.

The communication device 600 may be the first roadside unit in the upstream direction of the target area.

The communication module 601 can also be used to receive a subscription request from a server, and send one or more of the running status information, network status information or indication information of the roadside unit to the server according to the subscription request. The processing module 602 can also determine whether the communication device 600 meets a specific condition according to the operating status information and network status information of the communication device 600. If not, the communication module 601 can also be used to send instruction information to the server.

When performing the steps performed by the second roadside unit in the foregoing method embodiment, the communication module 601 may be used to receive a subscription request from the server. The communication module 601 can also be used to send one or more of operating status information, network status information or indication information according to the subscription request. The subscription request can be used to request the second roadside unit to periodically report operating status information and/or network status information, or the subscription request can be used to request the second roadside unit to report indication information after determining that it does not meet certain conditions. The processing module 602 can be used for the communication device 600 to determine whether it meets a specific condition, and if not, the communication module 601 can also be used for sending instruction information to the server.

When performing the steps performed by the third roadside unit in the foregoing method embodiment, the communication device 600 may include a communication module 601 and a processing module 602 that are coupled to each other. The communication module 601 may be used to support the communication device 600 to communicate, such as by Wired and/or wireless communication. The processing module 602 can be used for the communication device 600 to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.

The communication module 601 may be used to receive a second forwarding rule of the warning information from a server, the second forwarding rule includes a third identifier, and the third identifier is used to instruct the terminal device receiving the warning information not to forward the warning information . The communication module 601 may also send the second forwarding rule. Wherein, the third roadside unit may be located in the downstream direction of the target area, the upstream direction is the lane allowable direction, the lane is a lane included in the road where the target area is located, and the target area is a roadside unit that cannot pass through The area where the warning is carried out.

The communication module 601 can also receive third time information from the server, and send the second forwarding rule according to the third time information, where the third time information is used to instruct the second roadside unit to send the The start time and/or end time of the second forwarding rule.

The communication module 601 may also receive a fourth identifier from the server, and according to the fourth identifier, start to forward the second forwarding rule after receiving the second forwarding rule.

The communication module 601 may also broadcast the second forwarding rule and/or send the second forwarding rule to terminal devices in the coverage area of the third roadside unit.

The communication module 601 can be used to receive a subscription request from a server. The communication module 601 may also be configured to send one or more of operating status information, network status information or indication information to the server according to the subscription request. The subscription request can be used to request the second roadside unit to periodically report operating status information and/or network status information, or the subscription request can be used to request the second roadside unit to report indication information after determining that it does not meet certain conditions. The processing module 602 can be used for the communication device 600 to determine whether it meets a specific condition, and if not, the communication module 601 can also be used for sending instruction information to the server.

In addition, when the communication device shown above is implemented by hardware components, the communication device may include a communication interface, a transceiver, and a processor. Among them, the communication interface can be used for wired communication with the communication device. The transceiver can be used in a communication device for wireless communication. For example, the transceiver may include an antenna and a radio frequency circuit (or radio frequency unit). Among them, the radio frequency circuit can be used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals. The antenna can be used to send and receive radio frequency signals in the form of electromagnetic waves. The processor may be used to read and call the program stored in the memory to execute the processing steps executed by the server in the above method implementation. In addition, the communication device may further include a memory coupled with the processor for storing the above-mentioned program. Exemplarily, the processor may be used to read and call a program stored in the memory, and execute the above steps executed by the processing module 602. In other words, the above processing module 602 can be constituted by a processor or a processor and a memory. The communication interface and transceiver can be used to perform the above steps performed by the communication module 601. In other words, the above communication module 601 can be formed by a communication interface and a transceiver.

Exemplarily, when the steps executed by the server in the foregoing method embodiments are executed, the structure of a communication device provided in an embodiment of the present application may be as shown in FIG. 7. The communication device 700 may be a general-purpose computer or server or a dedicated computer or server. According to FIG. 7, the communication device 700 may include at least one processor 701, a communication bus 702, a memory 703, at least one communication interface 704, and a transceiver 705.

Among them, the communication bus 702 can be used to connect the components of the communication device 700 to realize information transmission between the components of the communication device 700. The processor 701 may be used to read and call a program stored in the memory 703 to execute the above steps executed by the processing module 602.

The communication interface 704 and the transceiver 705 can be used for the communication device 700 to communicate with external devices and devices. Specifically, it can be used for the communication device 700 to communicate with devices and devices such as a server in a wired manner to execute the steps of communicating with the server among the steps performed by the communication module 601 above. The transceiver 705 may be used for the communication device 700 to perform wireless communication, for example, for performing the steps of communicating with the terminal device among the steps performed by the communication module 601 above.

Exemplarily, the communication module 601 described in FIG. 6 above may be composed of at least one communication interface 704 and a transceiver 705. The processing module 602 described in FIG. 6 may be composed of at least one processor 701 and a memory 703.

In a possible implementation manner, the communication device 800 shown in FIG. 8 can be used as the terminal device involved in the foregoing method embodiment, and executes the steps performed by the terminal device in the foregoing method embodiment. Exemplarily, the terminal device may include the first Internet of Vehicles terminal or the second Internet of Vehicles terminal described in this application. As shown in FIG. 8, the communication device 800 may include a communication module 801 and a processing module 802, and the communication module 801 and the processing module 802 are coupled with each other. The communication module 801 can be used to support the communication device 800 to communicate, and the communication module 801 can have a wireless communication function. The processing module 802 can be used to support the communication device 800 to perform the processing actions in the above method embodiments, including but not limited to: generating information and messages sent by the communication module 801, and/or demodulating the signals received by the communication module 801 Decoding and so on.

Exemplarily, the communication module 801 can be used to receive the first forwarding rule of the warning information from the first roadside unit, and the communication module 801 can also be used to send the warning information according to the first forwarding rule after receiving the warning information. The warning information. Wherein, the first roadside unit may be located in the upstream direction of the target area, the upstream direction is the opposite direction of the lane allowed to pass, the lane is the lane included in the road where the target area is located, and the target area is Areas that cannot be warned by roadside units.

The communication module 801 can also be used to receive the warning information from the first roadside unit.

The communication module 801 may also be used to receive a second forwarding rule of the warning information from a third roadside unit, the second forwarding rule includes a third identifier, and the third identifier is used to indicate a terminal that receives the warning information The device does not forward the warning information. The third roadside unit may be located in a downstream direction of the target area.

In another implementation manner, the communication device provided in the embodiment of the present application may also be composed of hardware components, such as a processor, a memory, or a transceiver.

When the communication device is the above terminal device, its structure can also be as shown in FIG. 9. It is easy to understand and easy to illustrate. In FIG. 9, a mobile phone is taken as an example to illustrate the structure of the communication device 900. As shown in FIG. 9, the communication device 900 may include a processor 901, a memory 902, and a transceiver 903.

The above processor 901 may be used to process the communication protocol and communication data, and to control the first terminal device, execute the software program, process the data of the software program, and so on. The memory 902 may be used to store programs and data, and the processor 901 may execute the method executed by the first terminal device in the embodiment of the present application based on the program.

The transceiver 903 may include a radio frequency unit and an antenna. Among them, the radio frequency unit can be used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals. The antenna can be used to send and receive radio frequency signals in the form of electromagnetic waves. In addition, only the radio frequency unit can be regarded as the transceiver 903, and the communication device 900 can include a processor 901, a memory 902, a transceiver 903, and an antenna at this time.

In addition, the communication device 900 may also include an input and output device 904, such as a touch screen, a display screen, or a keyboard, etc., which can be used to receive data input by the user and output data to the user. It should be noted that some types of communication devices may not have input and output devices.

It should be understood that the above communication module 801 may have the structure shown in the transceiver 903, that is, include a radio frequency unit and an antenna; or, the communication module 801 may include the above radio frequency unit. The above processing module 802 may include a processor 901, or a processor 901 and a storage 902.

The above communication device 900 may also be constituted by a chip. For example, the chip includes a processor 901. In addition, the chip may further include a memory 902 and a transceiver 903, wherein two of the memory 902, the transceiver 903, and the processor 901 can be coupled to each other.

When performing the method shown in the embodiment of the present application, the transceiver 903 can be used to perform the steps performed by the communication module 801 described above. And, the processor 901 calls the program stored in the storage 902 to execute the steps executed by the above processing module 802.

It should be understood that the components included in the communication device in the above embodiments are illustrative, and are only a possible example, which may have other configuration modes in actual implementation. In addition, each component in the above communication device may be integrated into a module, or may be a separate physical existence. The above-mentioned integrated modules can be implemented in the form of hardware or software function modules, and should not be construed as being limited to the structure shown in the above drawings.

Based on the same concept as the foregoing method embodiment, the present application also provides a communication system, which may include the above server, a first roadside unit, and a terminal device. The communication system may be used to implement the operations performed by the server, the first roadside unit, and the terminal device in the foregoing method embodiment and any one of the possible implementation manners of the method embodiment. Exemplarily, the communication system has an architecture as shown in Fig. 1(a), Fig. 1(b) or Fig. 1(c).

Specifically, when implementing the communication method provided in the embodiment of the present application, the communication system may include a server, a first roadside unit, and a terminal device. In the communication system, the server may be used to determine the first forwarding rule of the warning information, and send the first forwarding rule to the first roadside unit, and the first forwarding rule is used to instruct the terminal device that receives the warning information Sending the warning information according to the first forwarding rule. The first roadside unit may be configured to receive the first forwarding rule of the warning information from the server, and send the first forwarding rule of the warning information. The terminal device may be used to receive the first forwarding rule of the warning information from the first roadside unit, and send the warning information according to the first forwarding rule after receiving the warning information. Wherein, the first roadside unit may be located in the upstream direction of the target area, the upstream direction is the direction opposite to the direction allowed by the lane, the lane is the lane included in the road where the target area is located, and the target area is impassable. The area where the roadside unit is warned.

Optionally, the communication system may further include the above second roadside unit and/or third roadside unit, and can perform operations performed by the above second roadside unit and/or third roadside unit.

Based on the same idea as the above method embodiment, the embodiment of the application also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the computer executes the above method embodiment and method implementation. For example, an operation performed by a server, a first roadside unit, a second roadside unit, a third roadside unit, or a terminal device in any possible implementation manner.

Based on the same idea as the above method embodiment, the present application also provides a computer program product, which when invoked and executed by a computer, enables the computer to implement the above method embodiment and any possible implementation of the method embodiment Operations performed by the server, the first roadside unit, the second roadside unit, the third roadside unit, or the terminal device.

Based on the same concept as the above method embodiment, the present application also provides a chip or chip system, and the chip may include a processor. The chip may also include a memory (or storage module) and/or a transceiver (or communication module), or the chip may be coupled with a memory (or storage module) and/or a transceiver (or communication module), wherein the transceiver ( (Or communication module) can be used to support the chip for wired and/or wireless communication, the memory (or storage module) can be used to store a program, and the processor can call the program to implement any one of the above method embodiments and method embodiments. The operation performed by the server, the first roadside unit, the second roadside unit, the third roadside unit, or the terminal device in the implementation manner. The chip system may include the above chips, and may also include the above chips and other discrete devices, such as a memory (or storage module) and/or a transceiver (or communication module).

The embodiments of this application are described with reference to the flowcharts and/or block diagrams of the methods, devices, and computer program products involved in the embodiments. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processors of general-purpose computers, special computers, embedded processors, or other programmable data processing equipment to generate a machine, so that instructions executed by the processor of the computer or other programmable data processing equipment are generated A device used to implement the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Claims

A communication method, characterized in that it comprises:

The server determines a first forwarding rule of the warning information, where the first forwarding rule is used to instruct the terminal device receiving the warning information to send the warning information according to the first forwarding rule;

Sending the first forwarding rule to the first roadside unit by the server;

The first roadside unit is located in an upstream direction of a target area, the target area is an area that cannot be warned by the roadside unit, the upstream direction is the opposite direction of the lane allowing passage, and the lane is the target area The lane included on the road.
The method of claim 1, wherein:

When the road where the target area is located includes a first lane and a second lane, and the allowable direction of the first lane is different from the allowable direction of the second lane, the upstream direction includes the first lane The direction opposite to the permitted direction of traffic, and/or the upstream direction includes the opposite direction of the permitted traffic direction of the second lane;

When the road where the target area is located includes a third lane and the road does not include a lane that is different from the allowable direction of the third lane, the upstream direction includes the direction opposite to the allowable direction of the third lane .
The method according to claim 1 or 2, wherein the first forwarding rule includes a first identifier, and the first identifier is used to instruct the terminal device receiving the warning information to forward the warning information.
The method according to any one of claims 1-3, wherein the first forwarding rule includes first time information and/or location information;

Wherein, the first time information is used to indicate the start time and/or end time of the terminal device forwarding the warning information;

The location information is used to indicate the start location and/or the end location of the terminal device to forward the warning information.
The method according to claim 4, wherein the first forwarding rule includes the first time information, and the method further includes:

The server determines the first time information according to the coverage area of the first roadside unit, the range of the target area, and vehicle speed information, and the vehicle speed information is used to indicate the speed of the vehicle to which the terminal device belongs.
The method according to claim 4 or 5, wherein the first forwarding rule includes the location information, and the method further includes:

The server determines the location information according to the coverage area of the first roadside unit and the range of the target area.
The method according to any one of claims 1-6, wherein the target area is located within the influence range of the early warning event corresponding to the early warning information, and the target area is not covered by roadside units; or,

The target area is located within the influence range of the early warning event corresponding to the early warning information, and the second roadside unit covering the target area does not meet a specific condition.
The method according to claim 7, wherein the target area is located within the influence range of the early warning event corresponding to the early warning information, and the second roadside unit covering the target area does not meet a specific condition, the Specific conditions include operating conditions;

The method also includes:

Determining, by the server, that the second roadside unit does not meet the operating state condition according to the operating state information of the second roadside unit;

The operating status information of the second roadside unit includes some or all of the following information:

The information of the message type that the second roadside unit supports to forward; or,

The number of concurrent messages supported by the second roadside unit; or,

The current number of concurrent messages of the second roadside unit; or,

The caching capability information of the second roadside unit; or,

The number of messages currently buffered by the second roadside unit.
The method according to claim 7, wherein the target area is located within the influence range of the early warning event corresponding to the early warning information, and the second roadside unit covering the target area does not meet a specific condition, the The specific conditions include network state conditions, and the method further includes:

Determining, by the server, that the second roadside unit does not satisfy the network state condition according to the network state information of the second roadside unit;

The network state information of the second roadside unit includes some or all of the following information:

Information used to indicate the load status of the short-range communication network of the second roadside unit; or,

Information used to indicate the quality of the near field communication network of the second roadside unit.
9. The method according to any one of claims 1-9, wherein the first forwarding rule includes forwarding frequency and/or forwarding priority.
The method according to any one of claims 1-10, wherein the method further comprises:

Sending, by the server, second time information to the first roadside unit, where the second time information is used to instruct the first roadside unit to send the start time and/or end time of the first forwarding rule; or ,

The server sends a second identifier to the first roadside unit, where the second identifier is used to instruct the first roadside unit to start forwarding the first forwarding rule since receiving the first forwarding rule .
The method according to any one of claims 1-11, wherein the first roadside unit is the first roadside unit located in the upstream direction of the target area.
The method according to any one of claims 1-12, wherein the method further comprises:

The server sends a second forwarding rule of the warning information to a third roadside unit, where the second forwarding rule includes a third identifier, and the third identifier is used to instruct the terminal device receiving the warning information not to forward the Describe early warning information.
The method according to claim 13, wherein the method further comprises:

Sending, by the server, third time information to the third roadside unit, where the third time information is used to instruct the third roadside unit to send the start time and/or end time of the second forwarding rule; or ,

The server sends a fourth identifier to the third roadside unit, where the fourth identifier is used to instruct the third roadside unit to start sending the second forwarding rule since receiving the second forwarding rule .
The method according to claim 13 or 14, wherein the third roadside unit is located in a downstream direction of the target area, and the downstream direction is a direction allowed by the lane.
A communication method, characterized in that it comprises:

The first roadside unit receives a first forwarding rule of the warning information from the server, where the first forwarding rule is used to instruct the terminal device receiving the warning information to send the warning information according to the first forwarding rule;

Sending the first forwarding rule by the first roadside unit;

The first roadside unit is located in an upstream direction of a target area, the target area is an area that cannot be warned by the roadside unit, the upstream direction is the opposite direction of the lane allowing passage, and the lane is the target area The lane included on the road.
The method of claim 16, wherein:

When the road where the target area is located includes a first lane and a second lane, and the allowable direction of the first lane is different from the allowable direction of the second lane, the upstream direction includes the first lane The direction opposite to the allowable direction of traffic, and/or the upstream direction includes the opposite direction of the allowable traffic direction of the second lane;

When the road where the target area is located includes a third lane and the road does not include a lane that is different from the allowable direction of the third lane, the upstream direction includes the direction opposite to the allowable direction of the third lane .
The method of claim 16 or 17, wherein the method further comprises:

Receiving, by the first roadside unit, second time information from the server, where the second time information is used to indicate the start time and/or end time for the first roadside unit to send the first forwarding rule;

The first roadside unit sends the first forwarding rule according to the second time information.
The method according to any one of claims 16-18, wherein the method further comprises:

The first roadside unit receives a third identifier from the server;

The first roadside unit starts to forward the first forwarding rule after receiving the first forwarding rule according to the third identifier.
The method according to any one of claims 16-19, wherein the sending of the first forwarding rule by the first roadside unit comprises:

The first roadside unit broadcasts the first forwarding rule; and/or

The first roadside unit sends the first forwarding rule to terminal devices in the coverage area of the first roadside unit.
The method according to any one of claims 16-20, wherein the first roadside unit is the first roadside unit located in the upstream direction of the target area.
A communication method, characterized in that it comprises:

The terminal device receives the first forwarding rule of the warning information from the first roadside unit;

After receiving the warning information, the terminal device sends the warning information according to the first forwarding rule;

The first roadside unit is located in an upstream direction of a target area, the target area is an area that cannot be warned by the roadside unit, the upstream direction is the opposite direction of the lane allowing passage, and the lane is the target area The lane included on the road.
The method of claim 1, wherein:

When the road where the target area is located includes a first lane and a second lane, and the allowable direction of the first lane is different from the allowable direction of the second lane, the upstream direction includes the first lane The direction opposite to the allowable direction of traffic, and/or the upstream direction includes the opposite direction of the allowable traffic direction of the second lane;

When the road where the target area is located includes a third lane and the road does not include a lane that is different from the allowable direction of the third lane, the upstream direction includes the direction opposite to the allowable direction of the third lane .
The method according to claim 22 or 23, wherein the first forwarding rule includes a first identifier, and the first identifier is used to instruct the terminal device receiving the warning information to forward the warning information.
The method according to any one of claims 22-24, wherein the first forwarding rule includes first time information and/or location information;

Wherein, the first time information is used to indicate the start time and/or end time for the terminal device to forward the warning information;

The location information is used to indicate the start location and/or the end location of the terminal device to forward the warning information.
The method according to any one of claims 22-25, wherein the first forwarding rule includes a forwarding frequency and/or a forwarding priority.
The method according to any one of claims 22-26, wherein the method further comprises:

The terminal device receives the warning information from the first roadside unit.
The method according to any one of claims 22-27, wherein the method further comprises:

The terminal device receives a second forwarding rule of the warning information from a third roadside unit, the second forwarding rule includes a third identifier, and the third identifier is used to instruct the terminal device receiving the warning information not to forward The early warning information;

The third roadside unit is located in a downstream direction of the target area, and the downstream direction is an allowable direction of the lane.
A communication device, characterized by comprising: a communication interface and a processor;

The communication interface is used for the communication device to communicate;

The processor is used to call and execute a program stored in the memory to execute the method according to any one of claims 1-15.
A communication device, characterized by comprising: a communication interface and a processor;

The communication interface is used for the communication device to communicate;

The processor is used to call and execute the program stored in the memory to execute the method according to any one of claims 16-21.
A communication device, characterized by comprising: a transceiver and a processor;

The transceiver is used for the communication device to communicate;

The processor is used to call and execute a program stored in the memory to execute the method according to any one of claims 22-28.
A communication system, characterized by comprising the communication device according to claim 29, the communication device according to claim 30, and the communication device according to claim 31.