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802.11p and LTE/LTE-a based vehicle networking message propagation method

An LTE-A, Internet of Vehicles technology, applied in the field of Internet of Vehicles, to achieve the effect of strong implementability, low deployment cost, and prevention of vehicle rear-end accidents

Inactive Publication Date: 2014-05-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the car-following model, it can be seen that there is a greater possibility of network fragmentation on roads with relatively low vehicle density. Although there are many routing mechanisms in VANET that support rapid network formation in a short period of time and timely and accurate transmission of accident information among vehicle clusters However, it is still unable to do anything about how to spread the accident information to vehicles in other subnets in a timely manner after an accident occurs on the road

Method used

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  • 802.11p and LTE/LTE-a based vehicle networking message propagation method
  • 802.11p and LTE/LTE-a based vehicle networking message propagation method
  • 802.11p and LTE/LTE-a based vehicle networking message propagation method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Embodiment one: if figure 1 As shown, when vehicle A 3 When driving on the road normally, the GPS information acquisition module on the vehicle terminal collects the direction and location information of the vehicle in real time during operation, and at the same time sends a message with its own relevant information to the surrounding vehicles within the effective communication range of the 802.11p communication module. This includes location, speed, LTE signal strength, and more. A 1 、A 2 After receiving the message, if it finds that it is similar to its own information, it will reply, but after receiving the message, vehicle C finds that the two parties are traveling in opposite directions and ignores it. received A 1 、A 2 After the message is replied, if A 1 、A 2 A car cluster has been formed, then A 3 Join the car cluster; if A 1 、A 2 If the two parties are not in the same car cluster, then A 1 、A 2 、A 3 Form same-vehicle clusters and build ad-hoc netwo...

Embodiment 2

[0027] Embodiment two: if image 3 As shown, when vehicle B 2 with B 3 During the driving process, after a rear-end collision occurs due to some reasons, the collided vehicle immediately adopts emergency message dissemination, and the steps are as follows:

[0028] ①Accident vehicle B 2 with B 3 In the mobile ad hoc network, the emergency information is immediately transmitted to the surrounding vehicles through the 802.11p communication module and related routing mechanisms, and the vehicle that receives the emergency safety information forwards it to other vehicles, based on the number of the accident vehicle, which can avoid the flood of the ad hoc network The emergence of widespread problems. Vehicles receiving safety information take different measures after comparing with the location information and driving direction of the accident vehicle, such as in image 3 Medium vehicle B 4 Emergency braking is applied while vehicle B 1 Because it is in front of the acciden...

Embodiment 3

[0032] Embodiment three: as Figure 4 As shown, when the accident location is near the intersection, eNodeB2's forwarding strategy should be to deliver the accident message to all vehicle clusters A and Z leading to the intersection on the four roads. If eNodeB2 cannot transmit the information to the vehicle clusters of all lanes at the intersection, it will transmit the information to eNodeB1, and eNodeB1 will complete the rest. This processing method is also applicable when an accident occurs on a long road covered by two or more eNodeBs.

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Abstract

The invention relates to an 802.11p and LTE / LTE-A based vehicle networking message propagation method, which is characterized in that a GPS information collection module collects the running speed, the running direction and positional information of a vehicle, a 802.11p communication module of a vehicle which is in the same road section and runs in the same direction and a 802.11p communication module located in an effective communication range form an Ad hoc network, vehicles in the Ad hoc network form a vehicle cluster, the cluster head sends a secure message to an LTE / LTE-A base station at a scheduled time interval, and the LTE / LTE-A base station updates a road table of the vehicle cluster; in an emergency case, vehicles in the same vehicle cluster use the 802.11p communication module to carry out message broadcasting, the cluster head sends the message to the LTE / LTE-A base station, and the LTE / LTE-A base station broadcasts the message to the cluster head of a related vehicle cluster according to the vehicle cluster road table. The 802.11p and LTE / LTE-A based vehicle networking message propagation method has the advantages of high practicability, low deployment cost and the like.

Description

technical field [0001] The invention relates to the technical field of the Internet of Vehicles, in particular to a method for disseminating messages of the Internet of Vehicles based on 802.11p and LTE / LTE-A. Background technique [0002] Vehicle Ad hoc Network (VANET) is a self-organized and open-structure inter-vehicle communication network. Provides communication between vehicles on the road and between vehicles and fixed roadside access points. VANET plays a very important role in ITS (Intelligent Transportation System, Intelligent Transportation System). Its goal is to serve as the basic part of future ITS, and form a unified wireless communication network through the communication between vehicles and vehicles and roadside nodes. It can also provide data services such as entertainment information and Internet access. [0003] 802.11p is a communication protocol extended from the IEEE802.11a protocol to support the communication between vehicles and vehicles, and bet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W84/18H04L12/46H04W72/04
Inventor 薛小平王骞张芳贾建华曹巧慧
Owner TONGJI UNIV
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