VANETs-based bidirectional lane congestion detection and information forwarding method

Abstract

The invention relates to a VANETs-based bidirectional lane congestion detection and information forwarding method. The VANETs-based bidirectional lane congestion detection and information forwarding method comprises the steps of automatically detection congestion information by a bus, and storing a line pack and congestion information pack; forwarding other congestion segment line packs and corresponding congestion information pack to the bus by other congestion vehicles during the congestion period; sending storage information to a road group head of the lane by the bus; broadcasting the linepack and the congestion information pack to neighbor road group heads in the same direction and opposite direction by the road group head; and forwarding the line pack and the congestion informationpack to a vehicle in a road group by the neighbor road group head, judging whether the line pack is coincided with a self driving line or not by each vehicle, if yes, receiving the road segment congestion information pack and planning a driving line again according to the congestion information, otherwise not receiving the congestion information pack. Compared with the prior art, the road segmentcongestion information can be automatically detected, the bus during congestion is used as a temporary RSU, the road group head in the lane road group is used as a mobile relay, and high-efficiency and reliable transmission of the congestion information can be achieved.

Description

Technical field [0001] The invention relates to the technical field of intelligent transportation, in particular to a method for detecting and information forwarding of two-way lane congestion based on VANETs. Background technique [0002] Vehicle Ad-hoc Networks (Vehicle Ad-hoc Networks, VANETs) is an application of traditional mobile ad-hoc networks (Mobile Ad-Hoc Network, MANET) in the field of road traffic. It is a kind of network nodes that are established in automobiles and fixed road infrastructure. (Roadside Unit, RSU) distributed and dynamically changing self-organizing communication network. VANETs are widely used in urban traffic information collection, route navigation, accident warning, road congestion notification, etc. They promote the development of Intelligent Transportation System (ITS) and are currently one of the hotspots in the field of transportation network research. The communication in VANETs can be divided into two categories: one is vehicle-to-vehicle ...

AI Technical Summary

Problems solved by technology

Traffic congestion may occur on any road section of the city. The arriving vehicles cannot predict the road conditions ahead, so they cannot modify the route in time. Although the existing navigation software can query the congestion situation of some road sections, there are still delays in updating information on road sections, and inaccurate information, etc. Therefore, how to obtain real-time and accurate road congestion information is an important prerequisite for solving urban traffic congestion problems

[0004] VANETs can transform urban traffic congestion into traffic information for transmission. However, in real traffic environments, due to the characteristics of high-speed node movement and frequent link switching in VANETs, ​​information cannot be efficiently forwarded through vehicles or RSUs; At the same time, there are many road vehicles, a large amount of information forwarding, and high network transmission costs. It is urgent to find relatively stable nodes as relays to forward information, and minimize the number of message forwarding to improve the efficiency of information transmission and ultimately achieve reliable traffic information. Efficient transmission

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