Distributed RSU System, Vehicle-Road Collaboration System and Data Transmission Method

Abstract

The present invention relates to a distributed RSU system, a vehicle-road collaborative system and a data transmission method. Through at least one separated RSU front-end transfer system and an RSU back-end control system, the RSU back-end control system includes a vehicle-to-everything (V2X) application layer in a multi-access edge computing (MEC) server; the V2X application layer multiplexes an Internet of Things (IoT) platform in the MEC server to obtain V2X data received by the RSU front-end transfer system; the RSU front-end transfer system includes a PC5 interface, a V2X-wireless protocol layer, a transport / network layer, and a conversion layer, reducing the overall cost of a large number of deployed RSUs, reducing the construction difficulty, and facilitating long-term software upgrades.

Description

Technical Field

[0001] The present invention relates to the field of vehicle networking, and particularly to a distributed RSU system, a vehicle-road collaborative system, and a data transmission method. Background Art

[0002] Vehicle networking is based on in-vehicle network, vehicle-to-vehicle network, and vehicle-mounted mobile Internet. According to the agreed communication protocol and data interaction standard, wireless communication and information exchange are carried out between vehicle-X (Vehicle-to-X, V2X, where X: vehicle, road, pedestrian, Internet, etc.). It is a large system network that can realize intelligent traffic management, intelligent dynamic information service, and vehicle intelligent control. Vehicle-road collaboration is a prerequisite for the commercialization of autonomous driving, one of the task goals of the Outline for the Construction of a Transportation Power, and also an integral part of the integrated intelligent transportation infrastructure in the "New Infrastructure". It can effectively support the transformation and upgrading of traditional infrastructure. However, when it comes to autonomous driving technology, only the intelligence of the vehicle is not enough. Intelligent settings of roadside infrastructure are required to obtain a better safe and efficient travel experience. In related technologies, usually an RSU (Road Side Unit) is set at a preset distance on the roadside, and multiple RSUs are set on the roadside. When the RSU needs service upgrade, each RSU needs to upgrade the software.

[0003] Therefore, how to avoid the need for each RSU to upgrade the software during service upgrade is an urgent problem to be solved. Summary of the Invention

[0004] In view of the deficiencies of the above-mentioned related technologies, the purpose of this application is to provide a distributed RSU system, a vehicle-road collaborative system, and a data transmission method, aiming to solve the problem that each RSU needs to upgrade the software during service upgrade.

[0005] A distributed roadside unit RSU system includes a separately provided RSU backend control system and at least one RSU front-end transfer system; the RSU backend control system and the RSU front-end transfer system are provided in different physical devices, and the RSU backend control system is integrated in a multi-access edge computing MEC server, and the RSU front-end transfer system is provided on a preset roadside device; the RSU backend control system is communicatively connected to at least one of the RSU front-end transfer systems;

[0006] The RSU backend control system includes a vehicle-to-everything V2X application layer; the V2X application layer and other application layers of the MEC server are integrated in the MEC server; the V2X application layer multiplexes the IOT platform in the MEC server to obtain the V2X data received by the RSU front-end transfer system;

[0007] The RSU front-end relay system includes a PC5 interface, a V2X-wireless protocol layer, a transport / network layer, a message layer, and a conversion layer; the RSU front-end relay system is connected to the on-vehicle unit through the PC5 interface, obtains the V2X data of the on-vehicle unit through the PC5 interface, and transmits the V2X data to the IOT platform through the V2X-wireless protocol layer, the transport / network layer, the message layer, and the conversion layer.

[0008] The above-mentioned distributed roadside unit RSU system may include at least one RSU front-end relay system and an RSU back-end control system that are separately arranged. The RSU back-end control system includes a vehicle-to-everything (V2X) application layer; the V2X application layer multiplexes the IOT platform in the multi-access edge computing (MEC) server to obtain the V2X data received by the RSU front-end relay system; the RSU front-end relay system includes a PC5 interface, a V2X-wireless protocol layer, a transport / network layer, a message layer, and a conversion layer, which separates the complete full-stack service units of the RSU in the prior art, reduces the overall cost of a large number of deployed RSUs, reduces the construction difficulty, and facilitates long-term software upgrades. The setting of the RSU back-end control system enables centralized maintenance of software configuration and upgrades.

[0009] Optionally, the RSU back-end control system is communicatively connected to a second communication system; the V2X application layer also multiplexes the IOT platform to obtain second roadside data received by the second communication system.

[0010] The setting of the above-mentioned second communication system allows the second communication system to receive roadside data from other roadside controllers and jointly obtain roadside data with the RSU front-end relay system, which can reduce the deployment of the RSU front-end relay system.

[0011] Based on the same inventive concept, the present application also provides a vehicle-road collaborative system, which includes the above-mentioned distributed roadside unit RSU system and at least one on-vehicle unit; the at least one on-vehicle unit is connected to the RSU front-end relay system through a PC5 interface; the RSU front-end relay system is communicatively connected to the RSU back-end control system.

[0012] The above vehicle-road cooperation system includes a distributed roadside unit (RSU) system and a directly affiliated on-vehicle unit. The distributed RSU system may include at least one RSU front-end transfer system and an RSU back-end control system that are separately arranged. The RSU back-end control system includes a vehicle-to-everything (V2X) application layer; the V2X application layer multiplexes the Internet of Things (IoT) platform in the multi-access edge computing (MEC) server to obtain the V2X data received by the RSU front-end transfer system. The RSU front-end transfer system includes a PC5 interface, a V2X-wireless protocol layer, a transport / network layer, and a conversion layer, which separates the complete full-stack service units of the RSU in the prior art, reduces the overall cost of a large number of deployed RSUs, reduces the construction difficulty, and facilitates long-term software upgrades. The setting of the RSU back-end control system enables centralized maintenance of software configuration and upgrades.

[0013] Optionally, the vehicle-road cooperation system further includes a second communication system, and the second communication system is communicatively connected to the RSU back-end control system.

[0014] Based on the same inventive concept, the present application further provides a data transmission method, which is applied to the above vehicle-road cooperation system. The method includes:

[0015] The at least one on-vehicle unit sends the V2X data to the V2X-wireless protocol layer of the RSU front-end transfer system through the PC5 interface, and transmits it to the IoT platform through the V2X-wireless protocol layer, the transport / network layer, and the conversion layer;

[0016] The IoT platform sends the V2X data to the V2X application layer.

[0017] Optionally, the method further includes: the IoT platform is communicatively connected to the second communication system, and the second communication system is connected to a traffic signal controller; the second communication system receives second roadside data from the traffic signal controller and sends the second roadside data to the IoT platform; the IoT platform sends the second roadside data to the V2X application layer; the V2X application layer generates vehicle-road cooperation data based on the V2X data and the second roadside data.

[0018] Optionally, after the V2X application layer generates vehicle-road collaborative data based on the V2X data and the second roadside data, it further includes: the V2X application layer sends the vehicle-road collaborative data to the RSU front-end transfer system and / or the second communication system through the IOT platform. The above-mentioned V2X application layer sending the vehicle-road collaborative data to the RSU front-end transfer system and / or the second communication system through the IOT platform allows the RSU front-end transfer system to send the vehicle-road collaborative data to the on-vehicle unit, and the second communication system to send the vehicle-road collaborative data to the traffic signal controller, enabling the driver to understand traffic information and dangerous situations in a timely manner, and the traffic signal controller can also change the control rules of traffic signals according to the vehicle-road collaborative data.

[0019] In the distributed RSU system, vehicle-road collaborative system and data transmission method proposed in the present invention, through at least one separated RSU front-end transfer system and RSU back-end control system, the RSU back-end control system includes a vehicle-to-everything (V2X) application layer; the V2X application layer multiplexes the IOT platform in the multi-access edge computing (MEC) server to obtain the V2X data received by the RSU front-end transfer system; the RSU front-end transfer system includes a PC5 interface, a V2X-wireless protocol layer, a transport / network layer, and a conversion layer, separating the complete full-stack service units of the RSU in the related technology, reducing the overall cost of a large number of deployed RSUs, reducing the construction difficulty, and facilitating long-term software upgrades. The setting of the RSU back-end control system enables centralized maintenance of software configuration and upgrades. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the RSU system framework in the prior art;

[0021] Figure 2 is an example diagram of the distributed roadside unit system framework provided by an embodiment of the present invention;

[0022] Figure 3 is an example of the vehicle-road collaborative system framework provided by another alternative embodiment of the present invention Figure 1 ;

[0023] Figure 4 is an example of the vehicle-road collaborative system framework provided by another alternative embodiment of the present invention Figure 2 ;

[0024] Figure 5 is a basic flowchart of the data transmission method provided by another alternative embodiment of the present invention;

[0025] Figure 6 is a detailed flowchart of the data transmission method provided by another alternative embodiment of the present invention;

[0026] DESCRIPTION OF REFERENCE NUMERALS:

[0027] RSU Application Layer (Applications) 11, Message / Facilities Layer 12, Transmission / Network Layer 13, PC5 Protocol Layer 14, RSU Front-End Relay System 21, PC5 Interface 211, V2X - Wireless Protocol Layer 212, Transmission / Network Layer 213, Message Layer 214, Conversion Layer 215, RSU Back-End Control System 22, V2X Application Layer 221, MEC Server 23, Other Application Layer 231, IOT Platform 232, Transmission / Network Layer in MEC Server 233, Physical / Data Link Layer in MEC Server 234, On-Vehicle Unit 24, Second Communication System 25, Traffic Signal Controller 26. Detailed Implementation Manner

[0028] To facilitate the understanding of this application, the following will provide a more comprehensive description of this application with reference to the relevant drawings. The preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of this application more thorough and comprehensive.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the description of this application in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0030] In the related art, an RSU (Road Side Unit) is usually set at a preset distance on the roadside, and multiple RSUs are set on the roadside. When the RSU needs service upgrade, the software of each RSU needs to be upgraded. In the prior art, for one RSU, reference can be made to Figure 1 As shown, this RSU is a complete full-stack service unit. This RSU includes an RSU Application Layer (Applications) 11, a Message / Facilities Layer 12, a Transmission / Network Layer 13, and a PC5 Protocol Layer 14.

[0031] Based on this, this application hopes to provide a solution that can solve the above technical problems, and its detailed content will be elaborated in the subsequent embodiments.

[0032] Embodiments of the present invention:

[0033] An embodiment of the present invention provides a distributed roadside unit (RSU) system, which includes: a separately arranged RSU backend control system and at least one RSU frontend transfer system. The RSU backend control system and the RSU frontend transfer system are respectively disposed in different physical devices, and the RSU backend control system is integrated in a multi-access edge computing (MEC) server, and the RSU frontend transfer system is disposed on a preset roadside device. At least one RSU frontend transfer system is communicatively connected to the RSU backend control system; wherein the preset roadside device can be a gantry or a roadside street lamp or other roadside devices.

[0034] The RSU backend control system includes a vehicle-to-everything (V2X) application layer; the V2X application layer and other application layers of the MEC server are integrated in the MEC server; the V2X application layer multiplexes the Internet of Things (IOT) platform in the MEC server to obtain the V2X data received by the RSU frontend transfer system. The V2X application layer is the application layer in the entire complete full-stack service unit of the RSU in the related prior art. The V2X application layer can also generate vehicle-road collaborative data according to the V2X data, and send the vehicle-road collaborative data to the RSU frontend transfer system through the IOT platform according to the Modbus or Mqtt protocol, and the RSU frontend transfer system sends the vehicle-road collaborative data to the on-vehicle unit. That is, multiple RSU frontend transfer systems can be respectively arranged on roadside devices, so that the RSU frontend transfer system obtains V2X data and accesses the V2X data to the IOT platform through the Modbus or Mqtt protocol and sends it to the V2X application layer. The RSU backend control system can be connected to at least one RSU frontend transfer system, so that the RSU backend control system can cover an entire section of the road and multiplex the IOT platform of the MEC, so that software configuration and upgrade can be centrally maintained.

[0035] The RSU front-end relay system includes a PC5 interface, a V2X-wireless protocol layer, a transport / network layer, a message layer, and a conversion layer; the RSU front-end relay system is connected to the on-vehicle unit through the PC5 interface, obtains the V2X data of the on-vehicle unit through the PC5 interface, and transmits the V2X data to the IOT platform through the V2X-wireless protocol layer, the transport / network layer, the message layer, and the conversion layer. Among them, the conversion layer can convert the V2X protocol into the modbus or mqtt protocol and access the IOT (Internet of Things) platform in the MEC server through the modbus or mqtt protocol. The V2X message layer and the PC5 protocol stack can be implemented through the RSU front-end relay system to communicate with the on-vehicle unit OBU, and access the IOT platform on the MEC through the modbus or mqtt protocol. The RSU back-end control system implements the V2X application layer and communicates with the RSU front-end relay system through the IOT platform. The IOT platform receives messages from the RSU front-end relay system through the Modbus or Mqtt protocol and issues commands to the RSU front-end relay system. Among them, in some examples, the RSU front-end relay system can use a single-chip microcomputer, which can reduce the complexity, cost, and environmental adaptability of the RSU front-end relay system located by the roadside.

[0036] In some examples, the V2X application layer reusing the IOT platform in the MEC server to obtain the V2X data received by the RSU back-end control system may include: the V2X application layer reusing the IOT platform to obtain the V2X data received by the RSU front-end relay system from the transport / network layer in the MEC server and the physical / data link layer in the MEC server, and the transport / network layer can apply the TCP / IP protocol.

[0037] In some examples, the communication connection method for the RSU back-end control system to communicate with at least one RSU front-end relay system includes at least one of the following communication connection methods: 5G, WiFi, and wired Ethernet ETH.

[0038] In some examples, the RSU back-end control system can also communicate with a second communication system; the V2X application layer also reuses the IOT platform to obtain the second roadside data received by the second communication system. Among them, the second roadside data can be the roadside data of other traffic signal controllers such as traffic lights or other roadside controllers. In this way, the deployment of the RSU front-end relay system can be reduced, and a small number of RSU front-end relay system deployments can be combined with the second communication system to obtain various roadside data. Among them, the RSU back-end control system and the second communication system can establish a connection through communication methods such as 5G, WiFi, and wired Ethernet ETH, and the TCP / IP protocol can be used to support data transmission, that is, the RSU back-end control system can also reuse the transport / network layer of the MEC server to obtain the second roadside data received by the second communication system.

[0039] The second roadside data received by the communication system can also be directly connected to the IOT platform of the MEC server using the MODBUS over TCP protocol, thereby connecting to its V2X application layer.

[0040] In some examples, the V2X application layer is also used to generate vehicle-road collaborative data based on the V2X data and the second roadside data; the V2X application layer also multiplexes the IOT platform to send the vehicle-road collaborative data to the second communication system and / or the RSU front-end transfer system. When the second communication system can send the received vehicle-road collaborative data to the traffic signal controller, the traffic signal controller can obtain the preset control instructions in the vehicle-road collaborative data, and the traffic signal controller controls the corresponding traffic signals according to the control instructions.

[0041] For ease of understanding, in this embodiment, the distributed roadside unit system provided in this embodiment will be described exemplarily with reference to the accompanying drawings.

[0042] Please refer to Figure 2 the example shown in the schematic diagram of the distributed roadside unit system framework. The distributed roadside unit RSU system includes: a separately provided RSU back-end control system 22 and at least one RSU front-end transfer system 21. The RSU back-end control system 22 and the RSU front-end transfer system 21 are provided in different physical devices, and the RSU back-end control system 22 is integrated into the multi-access edge computing MEC server 23, and the RSU front-end transfer system 21 is provided on the roadside gantry. The RSU back-end control system 22 is communicatively connected to at least one RSU front-end transfer 21 system using 5G / ETH / WiFi. The RSU back-end control system 22 is also communicatively connected to the second communication system 25 using 5G / ETH / WiFi.

[0043] The RSU back-end control system 22 includes a vehicle-to-everything V2X application layer 221; the V2X application layer 221 and other application layers 231 of the MEC server are integrated into the MEC server 23; the V2X application layer 221 multiplexes the IOT platform 232 in the MEC server to obtain the V2X data received by the RSU front-end transfer system 21 and the second roadside data received by the second communication system 25 from the transport / network layer 233 in the MEC server and the physical / data link layer 234 in the MEC server. The second roadside data can be the roadside data of traffic lights. And the V2X application layer 221 is the application layer 11 in the entire complete full-stack service unit of the RSU in the related prior art.

[0044] The RSU front-end transfer system 21 includes a PC5 interface 211, a V2X-wireless protocol layer 212, a transport / network layer 213, a message layer 214, and a conversion layer 215; the RSU front-end transfer system 21 is connected to the on-vehicle unit 24 through the PC5 interface 211, obtains the V2X data of the on-vehicle unit through the PC5 interface 211, and transmits the V2X data to the IOT platform 232 through the V2X-wireless protocol layer 212, the transport / network layer 213, the message layer 214, and the conversion layer 215.

[0045] The distributed roadside unit RSU system according to the embodiment of the present invention includes at least one RSU front-end transfer system and an RSU back-end control system that are separately arranged. The RSU back-end control system includes a vehicle-to-everything V2X application layer; the V2X application layer multiplexes the IOT platform in the MEC server to obtain the V2X data received by the RSU front-end transfer system; the RSU front-end transfer system includes a PC5 interface, a V2X-wireless protocol layer, a transport / network layer, a message layer, and a conversion layer, which can solve the problem that when the service is upgraded, each RSU needs to be upgraded with software, realize the separation of the complete full-stack service units of the RSU in the prior art, reduce the overall cost of a large number of deployed RSUs, reduce the construction difficulty, and facilitate long-term software upgrade. The setting of the RSU back-end control system enables centralized maintenance of software configuration and upgrade. The setting of the second communication system allows a small number of RSU front-end transfer systems to be deployed in combination with the second communication system to obtain various roadside data. For example, only one RSU front-end transfer system is required for a four-way intersection to communicate with multiple on-vehicle units OBU, and a more mature second communication system is used in other places. Thus, the deployment of the RSU front-end transfer system is reduced.

[0046] Another alternative embodiment of the present invention:

[0047] To solve the problem that each RSU set on the roadside needs to be upgraded with software during service upgrade, the present invention provides a vehicle-road cooperation system, and the vehicle-road cooperation system provided by the present invention will be described below with reference to embodiments.

[0048] The vehicle-road cooperation system in this embodiment includes the distributed roadside unit RSU system provided by the embodiment of the present invention and at least one on-vehicle unit OBU. The distributed roadside unit RSU system provided by the embodiment of the present invention can be referred to the specific description of the embodiment of the present invention above, and will not be elaborated here. At least one on-vehicle unit is connected to the RSU front-end transfer system through the PC5 interface; the RSU front-end transfer system is communicatively connected to the RSU back-end control system. In some embodiments, the vehicle-road cooperation system further includes a second communication system, and the second communication system is communicatively connected to the RSU back-end control system.

[0049] For the sake of easy understanding, the vehicle-road cooperation system provided by this embodiment will be described exemplarily below with reference to the accompanying drawings.

[0050] Please refer to Figure 3 Figure 3

[0051] Please refer to Figure 4 Figure 4 Figure 3 Figure 3

[0052] The vehicle-road collaborative system provided in this embodiment includes a distributed roadside unit (RSU) system and at least one on-vehicle unit (OBU). The distributed RSU system includes at least one separated RSU front-end transfer system and an RSU back-end control system. The RSU back-end control system includes a vehicle-to-everything (V2X) application layer. The V2X application layer multiplexes the Internet of Things (IoT) platform in the multi-access edge computing (MEC) server to obtain the V2X data received by the RSU front-end transfer system. The RSU front-end transfer system includes a PC5 interface, a V2X-wireless protocol layer, a transport / network layer, and a conversion layer, which separates the complete full-stack service units of the RSU in the related technology, reduces the overall cost of a large number of deployed RSUs, reduces the construction difficulty, and facilitates long-term software upgrade. The setting of the RSU back-end control system enables centralized maintenance of software configuration and upgrade.

[0053] Another alternative embodiment of the present invention:

[0054] To solve the problem that when the RSU needs service upgrade, the software of each RSU set on the roadside needs to be upgraded, the present invention provides a data transmission method. The data transmission method provided by the present invention will be described below in conjunction with the embodiments.

[0055] Please refer to Figure 5 the basic flowchart of the data transmission method shown. This data transmission method is applied to the vehicle-road collaborative system of another alternative embodiment of the present invention as described above. This data transmission method includes:

[0056] S501. At least one on-vehicle unit sends V2X data to the V2X-wireless protocol layer of the RSU front-end transfer system through the PC5 interface, and the V2X data is transmitted to the IoT platform of the MEC server through the V2X-wireless protocol layer, the transport / network layer, and the conversion layer.

[0057] Wherein, the transmission of the V2X data to the IoT platform of the MEC server through the V2X-wireless protocol layer, the transport / network layer, and the conversion layer may include: the V2X data is transmitted to the V2X-wireless protocol layer and the transport / network layer, and then reaches the conversion layer. The conversion layer converts the V2X protocol packet of the V2X data into a Modbus or MQTT protocol packet, and then transmits it to the IoT platform of the MEC server.

[0058] S502. The IoT platform sends the V2X data to the V2X application layer.

[0059] In some examples, the IoT platform is communicatively connected to a second communication system, and the second communication system is connected to a traffic signal controller; the second communication system receives second roadside data from the traffic signal controller and sends the second roadside data to the IoT platform. The IoT platform sends the second roadside data to the V2X application layer; the V2X application layer can generate vehicle-road collaborative data based on the V2X data and the second roadside data. After the V2X application layer generates the vehicle-road collaborative data based on the V2X data and the second roadside data, it may further include: the V2X application layer sends the vehicle-road collaborative data to the RSU front-end relay system and / or the second communication system through the IoT platform. Among them, the V2X application layer sending the vehicle-road collaborative data to the RSU front-end relay system through the IoT platform can be sent to the RSU front-end relay system by multiplexing the IoT platform, the transport / network layer, and the physical / link layer. The RSU front-end relay system unseals and repackages it into vehicle-road collaborative data recognizable by the on-vehicle unit and sends it to the on-vehicle unit. Among them, the V2X application layer sending the vehicle-road collaborative data to the second communication system through the IoT platform can also be sent to the second communication system by multiplexing the IoT platform, the transport / network layer, and the physical / link layer. The second communication system unseals and repackages it into vehicle-road collaborative data recognizable by other roadside controllers and sends it to other roadside controllers.

[0060] Another alternative embodiment of the present invention:

[0061] To solve the problem that when the RSU needs service upgrade, software of each RSU set on the roadside needs to be upgraded, the present invention provides a data transmission method. The data transmission method provided by the present invention will be specifically described below in combination with an application scenario.

[0062] Please refer to Figure 6 the detailed flowchart of the data transmission method shown. The data transmission method is applied to the vehicle-road collaborative system of another alternative embodiment of the present invention above. The data transmission method includes:

[0063] S601. Multiple on-vehicle units send V2X data to the V2X-wireless protocol layer of the RSU front-end relay system through the PC5 interface, and the V2X data is transmitted to the IoT platform of the MEC server through the V2X-wireless protocol layer, the transport / network layer, and the conversion layer.

[0064] S602. The second communication system receives second roadside data from the traffic signal controller and sends the second roadside data to the IoT platform.

[0065] In this example, S602 and S601 are executed simultaneously. And after they are executed simultaneously, S603 can be executed. In some examples, S602 can also be executed before S601, that is, the steps of S602-S601-S603 can be executed. Or the steps of S601-S602-S603 can also be executed.

[0066] S603. The IOT platform of the MEC server sends the V2X data and the second roadside data to the V2X application layer.

[0067] S604. The V2X application layer generates vehicle-road collaborative data based on the V2X data and the second roadside data.

[0068] S605. The V2X application layer directly sends the vehicle-road collaborative data to the RSU front-end transfer system through the IOT platform. After this step, S607 is executed.

[0069] S606. The V2X application layer directly sends the vehicle-road collaborative data to the second communication system through the IOT platform. After this step, S608 is executed.

[0070] S607. The RSU front-end transfer system sends the vehicle-road collaborative data to multiple on-vehicle units communicatively connected to the RSU front-end transfer system. Enabling the driver to understand traffic information and dangerous situations and take corresponding measures in a timely manner.

[0071] S608. The second communication system sends the vehicle-road collaborative data to the traffic signal controller. For the traffic signal controller to control traffic signals, etc. according to the control instructions in the vehicle-road collaborative data.

[0072] It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description. All such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A distributed roadside unit (RSU) system, characterized in that, It includes a separated RSU back-end control system and at least one RSU front-end transfer system; the RSU back-end control system and the RSU front-end transfer system are arranged in different physical devices, and the RSU back-end control system is integrated in a multi-access edge computing (MEC) server, and the RSU front-end transfer system is arranged on a preset roadside device; the RSU back-end control system is communicatively connected to at least one RSU front-end transfer system; The RSU back-end control system includes a vehicle-to-everything (V2X) application layer; the V2X application layer and other application layers of the MEC server are integrated in the MEC server; The V2X application layer multiplexes the Internet of Things (IoT) platform in the MEC server to obtain the V2X data received by the RSU front-end transfer system; the V2X application layer is the application layer in the entire complete full-stack business unit of the RSU; The RSU front-end transfer system includes a PC5 interface, a V2X-wireless protocol layer, a transport / network layer, a message layer, and a conversion layer; the RSU front-end transfer system is connected to an on-vehicle unit through the PC5 interface, obtains the V2X data of the on-vehicle unit through the PC5 interface, and transmits the V2X data to the IoT platform through the V2X-wireless protocol layer, the transport / network layer, the message layer, and the conversion layer.

2. The distributed roadside unit RSU system according to claim 1, wherein The V2X application layer multiplexing the IoT platform in the MEC server to obtain the V2X data received by the RSU back-end control system includes: the V2X application layer multiplexes the IoT platform to obtain the V2X data received by the RSU front-end transfer system from the transport / network layer in the MEC server and the physical / data link layer in the MEC server.

3. The distributed roadside unit RSU system according to claim 1 or 2, characterized in that, The communication connection manner for the RSU back-end control system to be communicatively connected to at least one RSU front-end transfer system includes at least one of the following communication connection manners: 5G, WiFi, and wired Ethernet (ETH).

4. The distributed roadside unit RSU system according to claim 1 or 2, characterized in that, The RSU back-end control system is also communicatively connected to a second communication system; the V2X application layer also multiplexes the IoT platform to obtain the second roadside data received by the second communication system.

5. The distributed roadside unit RSU system according to claim 4, wherein The V2X application layer is also used to generate vehicle-road collaborative data based on the V2X data and the second roadside data; the V2X application layer also multiplexes the IoT platform to send the vehicle-road collaborative data to the second communication system and / or the RSU front-end transfer system.

6. A vehicle-road collaborative system, characterized in that, The vehicle-road collaborative system includes a distributed roadside unit (RSU) system according to any one of claims 1-5 and at least one on-vehicle unit; the at least one on-vehicle unit is connected to the RSU front-end transfer system through the PC5 interface; the RSU front-end transfer system is communicatively connected to the RSU back-end control system.

7. The vehicle-road collaborative system according to claim 6, wherein The vehicle-road collaborative system also includes a second communication system, and the second communication system is communicatively connected to the RSU back-end control system.

8. A data transmission method, characterized in that Applied to the vehicle-road collaborative system according to claim 6, the method includes: The at least one on-vehicle unit sends the V2X data to the V2X-wireless protocol layer of the RSU front-end relay system through the PC5 interface, and transmits it to the IOT platform through the transport / network layer and the conversion layer; The IOT platform sends the V2X data to the V2X application layer.

9. The data transmission method according to claim 8, wherein The method further includes: The IOT platform is communicatively connected to a second communication system, and the second communication system is connected to a traffic signal controller; the second communication system receives the second roadside data from the traffic signal controller and sends the second roadside data to the IOT platform; The IOT platform sends the second roadside data to the V2X application layer; The V2X application layer generates vehicle-road collaborative data based on the V2X data and the second roadside data.

10. The data transmission method according to claim 8, wherein, After the V2X application layer generates the vehicle-road collaborative data based on the V2X data and the second roadside data, it further includes: The V2X application layer sends the vehicle-road collaborative data to the RSU front-end relay system and / or the second communication system through the IOT platform.

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