Instant route selection based on multi-path communication time and credibility in VANET (Vehicular Ad-Hoc Network)

Abstract

The invention relates to an instant route selection based on multi-path communication time and credibility in a VANET (Vehicular Ad-Hoc Network), belonging to the technical field of communication and being used for network communication of urban vehicles. The instant route selection method specifically comprises the steps of: selecting multiple paths with communication time within a threshold from current available paths to be used as standby paths, selecting a path with highest credibility from the standby paths for data transmission, and under the condition of firstly considering the communication time, selecting the path in the terms of the credibility. A reputation-based credibility management model is adopted for credibility of nodes, each node stores the credibility of neighbor nodes, the credibility of each path is expressed by using the lowest value of the credibility of each node in the path, and a node transmission group selects a path with highest credibility for transmission. The instantaneity of the credibility is ensured due to the route selection. Before each communication, a source node can rapidly find an available path, thus the efficiency is increased; and the characteristics of high topology change speed of nods in the VANET and high movement speed of the nodes are met.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a routing selection strategy in VANET. Under the conditions of rapid network topology changes and relatively high vehicle density, multiple paths are established and a most stable and efficient route is selected based on trust. Background technique [0002] With the rapid growth of the number of urban vehicles, the problems it brings follow one after another-traffic congestion, traffic accidents, which seriously affect people's work efficiency and threaten people's lives and property safety. The application of vehicle ad hoc network (VANET) expands the application range of traffic information and enhances its service quality on the one hand, and improves the operating efficiency of existing traffic facilities on the other hand. [0003] Vehicle-to-vehicle communication based on VANET can realize applications such as road safety warning and traffic congestion monitoring, as we...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the routing problem caused by the unstable path caused by frequent topology changes in the existing VANET, and propose a routing selection scheme based on multi-path connection time and trust degree for urban vehicle network communication, which is currently available Select multiple paths whose connection time is within the threshold as alternative paths, and select the path with the highest trust degree for data transmission. In the case of first considering the connection time, the path is selected according to the level of trust

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