A rapid dissemination method of road network traffic information based on vanet

Abstract

The invention provides a rapid road network traffic information spreading method based on a VANET, and relates to the field of vehicle-mounted ad hoc networks. According to the method, the problems that when vehicle information is spread in the prior art, channel scrambling is prone to occurring or network resource occupation is severe when the vehicle density is higher, and information spreading discontinuity can occur when the vehicle density is low or the density of distances between vehicles is uneven are solved. According to the method, a vehicle node with the farthest spreading distance in the diffusion direction of an information diffusion center is used as a preferential forwarding node, after nodes closer to the operating range of the information diffusion center in the same road section receive traffic information forwarded by farther receiving nodes, the nodes stop forwarding the traffic information or when the traffic information forwarded by the farthest node is not received in a waiting time, periodic forwarding is performed, therefore, rapid spreading of the traffic information is achieved through the least forwarding nodes and at the longest spreading distance, and the traffic information can be diffused and spread in road networks rapidly and continuously.

Description

technical field [0001] The invention relates to the field of vehicular ad hoc networks, in particular to a VANET-based rapid dissemination method of road network traffic information. Background technique [0002] With the increase of private cars year by year, traffic congestion has become a very common phenomenon in the urban road network. If vehicles can understand the congested sections of the road network early and carry out route planning, vehicle congestion can be reduced and road congestion can be alleviated. Vehicle-to-vehicle communication is an effective means of wirelessly disseminating vehicle information, and the broadcast protocol is a relatively common and important communication method, the most common of which is the Flooding broadcast protocol, but all nodes of the protocol carry out information Forwarding, there will be serious channel contention, and even broadcast storms and other problems. To solve such problems, Wisitpongphan (N. Wisitpongphan, O.K. T...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a VANET-based rapid dissemination method of road network traffic information to solve the problem of channel competition or serious occupation of network resources when the vehicle density is high in the prior art when disseminating vehicle information, and When the vehicle density is sparse or the distance between vehicles is uneven, there will be a problem that the information dissemination link is broken and the information cannot be continued to disseminate, and the forwarding information cannot completely cover the entire network.

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