Topology-discovery-based data distribution method of vehicle self-organizing network

Abstract

The invention provides a topology-discovery-based data distribution method of a vehicle self-organizing network. The method comprises the steps as follows: a broadcast cycle of a source vehicle is calculated, and an event message monitored by the source vehicle is broadcasted according to the broadcast cycle; the event message serves as a probe of topology discovery, and the source vehicle is colored according to a coloring principle; and waiting time for a receiving vehicle is calculated, after the receiving vehicle receives the event message, whether the event message is forwarded at the waiting time is determined, if yes, the receiving vehicle is colored dark grey, and the event message is broadcasted, otherwise, the receiving vehicle is colored grey, and the process is finished. The topology-discovery-based data distribution method of the vehicle self-organizing network defines the broadcast cycle of the source vehicle and the waiting time of the receiving vehicle, so that the time delay of message transmission is reduced effectively, the reliability of event message transmission is improved, the number of transcripts of event message in the network is controlled, and the network communication load is reduced.

Description

technical field [0001] The invention relates to the fields of wireless communication and intelligent transportation, in particular to a data distribution method of a vehicle ad hoc network based on topology discovery. Background technique [0002] Vehicle Ad Hoc Networks (VANETs) is a special kind of wireless ad hoc network, and it is also an important part of intelligent transportation system. It is an ad hoc network that applies wireless communication technology to inter-vehicle communication. In addition to solving inter-vehicle communication, it is also extremely important for traffic safety and the intelligence and convenience of vehicles. In addition to the basic characteristics of the wireless ad hoc network, the vehicle ad hoc network also has its own characteristics: first, the high-speed movement of the vehicle nodes will cause the intermittent connectivity of the network and the characteristics of the fast dynamic network topology, which will make it difficult to ...

AI Technical Summary

Problems solved by technology

[0012] In this scheme, after the vehicle receives the forwarding message, it obtains the information of the neighbor nodes through continuous active inquiry, and then determines the forwarding vehicle according to the mutual comparison of the neighbor nodes, which causes a certain degree of communication delay. Somewhat imperfect for higher vehicular ad hoc networks

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