Method and system for processing repeated broadcast messages of Internet of Vehicles

Abstract

The invention provides an Internet of Vehicles repeated broadcast message processing method and system, and the method comprises the steps: obtaining the first vehicle state information of a vehicle node side and the second vehicle state information of a road side unit in real time; determining real position information of a vehicle node side according to the first vehicle state information, taking the real position information of the vehicle node side as a circle center, taking a preset radius distance as a detection range, and judging whether the first vehicle state information and the second vehicle state information in the detection range have the same event information or not; and when the same event information exists in the detection range, determining the roadside unit closest to the real position information of the vehicle node side, sending an instruction of continuing to broadcast the event information to the roadside unit, and sending an instruction of stopping sending the event information to the roadside units in the detection range to other roadside units in the detection range. According to the invention, information repetition caused by the fact that the network connection vehicle node and the road test equipment RSU send the same event broadcast in the high-flow area is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle networking repeated broadcast message processing, and in particular to a vehicle networking repeated broadcast message processing method and system. Background Art

[0002] The Internet of Vehicles is a broadcast-based communication wireless network. The broadcast mechanisms such as periodic repeated broadcasts by road test equipment, simultaneous data broadcasts between vehicles, and multi-hop forwarding on the vehicle side will cause broadcast storms during the event volume concurrent period and the overlapping coverage area of ​​the road test equipment, affecting the network quality and causing channel congestion. (For example: the car detects congestion information, the RSU also detects congestion, and both devices broadcast the congestion information to the surrounding vehicles at the same time. The RSU equipment and vehicles at the same high-density vehicle gathering intersection broadcast the same congestion information at the same time. The vehicles that receive the congestion information broadcast the congestion information to the surrounding vehicles. Once such services are concurrent, it will cause a lot of communication resources waste and congestion problems.) At present, in the field of the Internet of Vehicles, some scholars have studied the processing methods (broadcast suppression technology) of repeated broadcast messages of the Internet of Vehicles, and most of them use RSU equipment to assist in screening broadcast messages.

[0003] The existing method of filtering broadcast messages using the computing power of RSU does not take into account the importance of the "cloud control platform" in the technical architecture of the Internet of Vehicles. Distributing the computing power requirements on RSU devices will greatly increase the construction and maintenance costs of the RSU supporting computing power equipment, and does not consider the impact of the RSU periodic broadcast itself on the Internet of Vehicles communication network in the case of parallel emergency events. In addition, the forwarding of broadcast emergency messages using the distribution of RSU nodes does not take into account the broadcast message forwarding mechanism when the RSU equipment coverage is discontinuous. Road sections without continuous coverage by RSU equipment will still cause vehicle communication nodes to forward emergency broadcast messages. The above technical method of processing repeated broadcast messages of the Internet of Vehicles based solely on road-side equipment is highly dependent on the construction of road test RSU equipment, and ignores the importance of the cloud control platform in the technical architecture of the Internet of Vehicles. It does not consider the use of the powerful computing power of the cloud control platform to suppress the repeated broadcast messages of the Internet of Vehicles. Summary of the invention

[0004] The purpose of the present invention is to propose a method and system for processing repeated broadcast messages in an Internet of Vehicles, so as to solve the technical problem of how to avoid the networked vehicle nodes and road test equipment in high-traffic areas sending the same event broadcast to cause information duplication.

[0005] On the one hand, a method for processing repeated broadcast messages in an Internet of Vehicles is provided, comprising:

[0006] Acquire the first vehicle status information of the vehicle node side and the second vehicle status information of the roadside unit in real time;

[0007] Determine the real position information of the vehicle node side according to the first vehicle status information, and use the real position information of the vehicle node side as the center and a preset radius as the detection range, and determine whether the first vehicle status information and the second vehicle status information within the detection range have the same event information;

[0008] When the same event information exists within the detection range, the roadside unit closest to the actual position information of the vehicle node is determined, an instruction to continue broadcasting the event information is sent to the roadside unit, and an instruction to stop sending the event information to the roadside units within the detection range is sent to other roadside units within the detection range.

[0009] Preferably, it also includes:

[0010] When the vehicle on the vehicle node side drives out of the detection range, a new detection range is set with the position of the vehicle on the vehicle node side as the center and a preset radius distance;

[0011] Determine whether the first vehicle state information and the second vehicle state information within the new detection range have the same event information;

[0012] When the same event information exists in the new detection range, the roadside unit closest to the vehicle on the vehicle node side is determined, and an instruction to continue broadcasting the event information is sent to the roadside unit, and an instruction to stop sending the event information to the roadside units within the new detection range is sent to other roadside units within the new detection range until the vehicle drives out of the new detection range. The next detection range is then re-determined and the first vehicle status information and the second vehicle status information of the next detection range are compared to see whether there is the same event information.

[0013] Preferably, the first vehicle status information is formed by encapsulating the real-time status and safety warning information of the vehicle node side, and broadcasting it to other vehicles around it at a preset first periodic frequency.

[0014] Preferably, the second vehicle status information is obtained by the roadside unit by encapsulating the real-time status information of surrounding traffic participants, and broadcasting it to the surrounding vehicles at a preset second periodic frequency.

[0015] Preferably, it also includes:

[0016] When the same event information exists within the detection range, the vehicle node is commanded to broadcast the event information to the surrounding vehicles at the third periodic frequency until there is no same event information in the first vehicle status information and the second vehicle status information within the detection range, and the vehicle node is restored to broadcast all event information to the surrounding vehicles at the first periodic frequency;

[0017] The third cycle frequency is slower than the first cycle frequency.

[0018] Preferably, the determining whether the first vehicle status information and the second vehicle status information within the detection range have the same event information specifically includes:

[0019] If the same event information exists in the first vehicle state information and the second vehicle state information, and the event information is the same for both within a preset duration, it is determined that the same event information exists in the first vehicle state information and the second vehicle state information.

[0020] On the other hand, a system for processing repeated broadcast messages of an Internet of Vehicles is provided, which is used for the method for processing repeated broadcast messages of an Internet of Vehicles, comprising:

[0021] A cloud control platform, used to obtain the first vehicle status information of the vehicle node side and the second vehicle status information of the roadside unit in real time;

[0022] It is also used to determine the real position information of the vehicle node side according to the first vehicle state information, and use the real position information of the vehicle node side as the center and a preset radius distance as the detection range to determine whether the first vehicle state information and the second vehicle state information within the detection range have the same event information;

[0023] When the same event information exists within the detection range, the roadside unit closest to the actual position information of the vehicle node is determined, an instruction to continue broadcasting the event information is sent to the roadside unit, and an instruction to stop sending the event information to the roadside units within the detection range is sent to other roadside units within the detection range.

[0024] Preferably, the cloud control platform is also used to, when the vehicle on the vehicle node side drives out of the detection range, re-set the position of the vehicle on the vehicle node side as the center of the circle and the preset radius distance as a new detection range;

[0025] Determine whether the first vehicle state information and the second vehicle state information within the new detection range have the same event information;

[0026] When the same event information exists in the new detection range, the roadside unit closest to the vehicle on the vehicle node side is determined, and an instruction to continue broadcasting the event information is sent to the roadside unit, and an instruction to stop sending the event information to the roadside units within the new detection range is sent to other roadside units within the new detection range until the vehicle drives out of the new detection range. The next detection range is then re-determined and the first vehicle status information and the second vehicle status information of the next detection range are compared to see whether there is the same event information.

[0027] Preferably, the cloud control platform is further used to, when identical event information exists within the detection range, command the vehicle node side to broadcast the event information to the vehicles around it at a third periodic frequency, until there is no identical event information in the first vehicle status information and the second vehicle status information within the detection range, and then resume the vehicle node side to broadcast all event information to the vehicles around it at the first periodic frequency;

[0028] The third cycle frequency is slower than the first cycle frequency.

[0029] Preferably, the cloud control platform is also used to determine that the first vehicle status information and the second vehicle status information have the same event information if the same event information exists in the first vehicle status information and the second vehicle status information and the event information is the same for both within a preset duration.

[0030] In summary, the implementation of the embodiments of the present invention has the following beneficial effects:

[0031] The method for processing repeated broadcast messages of the Internet of Vehicles provided by the present invention avoids the situation in which the networked vehicle nodes and road test equipment RSU send the same event broadcast in high-traffic areas to cause information duplication, avoids the process of processing and screening the Internet of Vehicles broadcast messages in the RSU, and reasonably utilizes the powerful computing power of the cloud control platform and the comprehensive management capabilities of networked vehicles and equipment, greatly reducing the complexity of the algorithm. The typical distance of V2X message distribution is only a few hundred meters, and there is no need to broadcast over a large area. In order to reduce the broadcast range and improve efficiency, the V2X application server of the cloud control platform selects appropriate target networked vehicles and RSU service areas as the broadcast sending area according to the specified geographical location, which is a more efficient broadcast method. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0033] Figure 1 The present invention is a schematic diagram of the main process of a method for processing repeated broadcast messages in an Internet of Vehicles according to an embodiment of the present invention.

[0034] Figure 2 The present invention is a logical schematic diagram of a method for processing repeated broadcast messages of an Internet of Vehicles according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] like Figure 1 and Figure 2 FIG. 1 is a schematic diagram of an embodiment of a method for processing repeated broadcast messages in a vehicle network provided by the present invention. In this embodiment, the method includes the following steps:

[0037] Step S1, real-time acquisition of the first vehicle status information of the vehicle node side and the second vehicle status information of the roadside unit; in this embodiment, the first vehicle status information is formed by the vehicle node side encapsulating its own real-time status and safety warning information, and broadcasting it to other vehicles around it at a preset first periodic frequency; the second vehicle status information is formed by the roadside unit encapsulating the real-time status information of the surrounding traffic participants obtained by it, and broadcasting it to the vehicles around it at a preset second periodic frequency; it can be understood that the networked vehicle node (vehicle node side) encapsulates its own real-time status and safety warning information into a Msg BSM message, broadcasts it to the surrounding vehicles at a periodic frequency T1, and reports the Msg BSM message to the cloud control platform through the wireless data interface; the roadside unit RSU obtains the real-time status information of the surrounding traffic participants through the corresponding detection means owned by the roadside itself and encapsulates it into a Msg RSM message, broadcasts it to the surrounding vehicles at a periodic frequency T2, and reports the Msg RSM message to the cloud control platform through the wireless data interface.

[0038] Step S2, determining the real position information of the vehicle node side according to the first vehicle status information, and taking the real position information of the vehicle node side as the center and the preset radius distance as the detection range, judging whether the first vehicle status information and the second vehicle status information within the detection range have the same event information; it can be understood that the cloud control platform obtains the real position information A of the reported connected vehicle through the GPS information reported by the connected vehicle i (x, y); the cloud control platform determines the same position A i (x, y) takes R as the radius. The specific value of R can be set according to the equipment of the specific roadside unit and the performance of the vehicle. i Whether there is the same event information reported by Msg BSM and Msg RSM in the circle with (x, y) as the center.

[0039] In a specific embodiment, the determining whether the first vehicle status information and the second vehicle status information within the detection range have the same event information specifically includes: if the first vehicle status information and the second vehicle status information have the same event information and the event information of both are the same within a preset duration, then determining that the first vehicle status information and the second vehicle status information have the same event information. i (x,y) takes R as radius, A i Whether there is the same event information reported by Msg BSM and Msg RSM in the circle with (x, y) as the center, and whether it is the same within the set duration D.

[0040] Step S3, when the same event information exists within the detection range, determine the roadside unit closest to the real location information of the vehicle node, send an instruction to the roadside unit to continue broadcasting the event information, and send an instruction to other roadside units within the detection range to stop sending the event information to the roadside units within the detection range. It can be understood that the cloud control platform is based on A i The distribution of RSU devices near (x, y) is checked. The nearest RSU station is selected and a command is issued to it to continue broadcasting. At the same time, a command to stop the same broadcast is issued to other RSU devices in the area.

[0041] In a specific embodiment, when the same event information exists within the detection range, the vehicle node is commanded to broadcast the event information to the surrounding vehicles at the third cycle frequency until there is no same event information in the first vehicle status information and the second vehicle status information within the detection range, and the vehicle node is restored to broadcast all event information to the surrounding vehicles at the first cycle frequency; wherein the third cycle frequency is slower than the first cycle frequency. The main purpose is that the cloud control platform synchronously sends the instruction to reduce the broadcast frequency of the above repeated information to the source networked vehicle node, reducing the sending frequency T 1， Until the same position A i Within the radius R of (x,y), the messages reported by Msg BSM and Msg RSM do not have the same events.

[0042] In one embodiment, the method further includes: step S4, when the vehicle on the vehicle node side drives out of the detection range, resetting the position of the vehicle on the vehicle node side as the center of the circle and the preset radius distance as a new detection range;

[0043] Determine whether the first vehicle state information and the second vehicle state information within the new detection range have the same event information;

[0044] When the same event information exists within the new detection range, the roadside unit closest to the vehicle on the vehicle node side is determined, and an instruction to continue broadcasting the event information is sent to the roadside unit, and an instruction to stop sending the event information to the roadside units within the new detection range is sent to other roadside units within the new detection range, until the vehicle leaves the new detection range, and the next detection range is re-determined and the first vehicle status information and the second vehicle status information of the next detection range are compared to see whether the same event information exists. That is, if the source node connected vehicle leaves the above range, that is, the position is updated, or the event is updated, then the event message reported within the radius of its new position is re-compared to see whether there is a repeated event message reported. By repeating this process continuously, the technical architecture based on the "people-vehicle-road-cloud" of the Internet of Vehicles can be realized. On the basis of unified cloud control of connected vehicles and roadside equipment RSU, the V2X application server of the cloud control platform is used to select appropriate target connected vehicles and RSU service areas as broadcast sending areas according to the specified geographical location to prevent the connected vehicle nodes and RSU equipment from repeatedly broadcasting repeated messages carrying the same event in the same area. The typical distance of V2X message distribution is only a few hundred meters, so there is no need for large-scale broadcasting. In order to reduce the broadcast range and improve efficiency, the V2X application server of the cloud control platform selects appropriate target connected vehicles and RSU service areas as the broadcast sending area according to the specified geographical location, which is a more efficient broadcasting method.

[0045] It should be noted that the system described in the above embodiment corresponds to the method described in the above embodiment. Therefore, the undetailed parts of the system described in the above embodiment can be obtained by referring to the contents of the method described in the above embodiment, and will not be repeated here.

[0046] In summary, the implementation of the embodiments of the present invention has the following beneficial effects:

[0047] The method for processing repeated broadcast messages of the Internet of Vehicles provided by the present invention avoids the situation in which the networked vehicle nodes and road test equipment RSU send the same event broadcast in high-traffic areas to cause information duplication, avoids the process of processing and screening the Internet of Vehicles broadcast messages in the RSU, and reasonably utilizes the powerful computing power of the cloud control platform and the comprehensive management capabilities of networked vehicles and equipment, greatly reducing the complexity of the algorithm. The typical distance of V2X message distribution is only a few hundred meters, and there is no need to broadcast over a large area. In order to reduce the broadcast range and improve efficiency, the V2X application server of the cloud control platform selects appropriate target networked vehicles and RSU service areas as the broadcast sending area according to the specified geographical location, which is a more efficient broadcast method.

[0048] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for processing repeated broadcast messages in an Internet of Vehicles, characterized in that: include: Acquire the first vehicle status information of the vehicle node side and the second vehicle status information of the roadside unit in real time; Determine the real position information of the vehicle node side according to the first vehicle status information, and use the real position information of the vehicle node side as the center and a preset radius as the detection range, and determine whether the first vehicle status information and the second vehicle status information within the detection range have the same event information; When the same event information exists within the detection range, the roadside unit closest to the actual position information of the vehicle node is determined, an instruction to continue broadcasting the event information is sent to the roadside unit, and an instruction to stop sending the event information to the roadside units within the detection range is sent to other roadside units within the detection range.

2. The method according to claim 1, characterized in that Also includes, When the vehicle on the vehicle node side drives out of the detection range, a new detection range is set with the position of the vehicle on the vehicle node side as the center and a preset radius distance; Determine whether the first vehicle state information and the second vehicle state information within the new detection range have the same event information; When the same event information exists within the new detection range, the roadside unit closest to the vehicle on the vehicle node side is determined, and an instruction to continue broadcasting the event information is sent to the roadside unit, and an instruction to stop sending the event information to the roadside units within the new detection range is sent to other roadside units within the new detection range until the vehicle drives out of the new detection range. The next detection range is then re-determined and the first vehicle status information and the second vehicle status information of the next detection range are compared to see whether there is the same event information.

3. The method according to claim 2, characterized in that The first vehicle status information is formed by encapsulating the vehicle node's own real-time status and safety warning information, and broadcasting it to other vehicles around it at a preset first periodic frequency.

4. The method according to claim 3, characterized in that The second vehicle status information is obtained by the roadside unit by encapsulating the real-time status information of surrounding traffic participants, and broadcasting it to the surrounding vehicles according to a preset second periodic frequency.

5. The method according to claim 4, characterized in that Also includes, When the same event information exists within the detection range, the vehicle node is commanded to broadcast the event information to the surrounding vehicles at the third periodic frequency until there is no same event information in the first vehicle status information and the second vehicle status information within the detection range, and the vehicle node is restored to broadcast all event information to the surrounding vehicles at the first periodic frequency; The third cycle frequency is slower than the first cycle frequency.

6. The method according to claim 5, characterized in that The determining whether the first vehicle status information and the second vehicle status information within the detection range have the same event information specifically includes: If the same event information exists in the first vehicle state information and the second vehicle state information, and the event information is the same for both within a preset duration, it is determined that the same event information exists in the first vehicle state information and the second vehicle state information.

7. A system for processing repeated broadcast messages in an Internet of Vehicles, for implementing the method according to any one of claims 1 to 6, characterized in that: include, A cloud control platform, used to obtain the first vehicle status information of the vehicle node side and the second vehicle status information of the roadside unit in real time; It is also used to determine the real position information of the vehicle node side according to the first vehicle state information, and use the real position information of the vehicle node side as the center and a preset radius distance as the detection range to determine whether the first vehicle state information and the second vehicle state information within the detection range have the same event information; When the same event information exists within the detection range, the roadside unit closest to the actual position information of the vehicle node is determined, an instruction to continue broadcasting the event information is sent to the roadside unit, and an instruction to stop sending the event information to the roadside units within the detection range is sent to other roadside units within the detection range.

8. The system according to claim 7, characterized in that The cloud control platform is also used to, when the vehicle on the vehicle node side drives out of the detection range, reset the position of the vehicle on the vehicle node side as the center of the circle and the preset radius distance as a new detection range; Determine whether the first vehicle state information and the second vehicle state information within the new detection range have the same event information; When the same event information exists within the new detection range, the roadside unit closest to the vehicle on the vehicle node side is determined, and an instruction to continue broadcasting the event information is sent to the roadside unit, and an instruction to stop sending the event information to the roadside units within the new detection range is sent to other roadside units within the new detection range until the vehicle drives out of the new detection range. The next detection range is then re-determined and the first vehicle status information and the second vehicle status information of the next detection range are compared to see whether there is the same event information.

9. The system according to claim 8, characterized in that The cloud control platform is also used to, when identical event information exists within the detection range, instruct the vehicle node side to broadcast the event information to the vehicles around it at a third periodic frequency, until there is no identical event information in the first vehicle status information and the second vehicle status information within the detection range, and then resume the vehicle node side to broadcast all event information to the vehicles around it at the first periodic frequency; The third cycle frequency is slower than the first cycle frequency.

10. The system according to claim 9, characterized in that The cloud control platform is also used to determine that the first vehicle status information and the second vehicle status information have the same event information if the same event information exists in the first vehicle status information and the second vehicle status information and the event information is the same for a preset duration.

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