Geographic information routing method based on road topological structure in vehicle network

Abstract

The present invention discloses a geographic information routing method based on a road topological structure in a vehicle network. The method combines an existing MAC layer access protocol, uncontested channel access and route selection are employed, the next hop node located in a cavity is eliminated, transmission target nodes in two hops are determined, and the next hop node route criteria is defined through combination of the access condition of business channels; and through combination of the features of intersection nodes, an improved edge transmission mode is provided to reduce the transmission performance reduction caused by keeping the edge transmission mode for a long time. The geographic information routing method based on the road topological structure in the vehicle network takes improvement of the validity of route selection each time as the objective to reduce the generation of low efficiency forwarding as much as possible so as to reduce the average end-to-end time delay and reduce the packet loss rate.

Description

technical field [0001] The invention designs a geographic information routing method based on a road topology in a vehicle network, and belongs to the technical field of communication. Background technique [0002] As a research direction of mobile ad hoc network (MANET), vehicular ad hoc network (VANET) has important applications in intelligent transportation system (ITS). VANET regards vehicle nodes and road infrastructure as network nodes, and mainly realizes communication between vehicles (V2V, Vehicle-to-Vehicle Communication) and communication between vehicles and roadside facilities (V2I, Vehicle-to-Infrastructure Communication). The real-time communication mobile network improves traffic safety and management efficiency, and also provides more services for vehicle driving. Due to the high mobility of vehicles, VANET has the characteristics of frequent network topology changes. In VANET scenarios, general MANET protocols are prone to network interruption, high delay,...

AI Technical Summary

Problems solved by technology

[0003] In the urban scene of the vehicle network, because of the occlusion of buildings, the data transmission between vehicle nodes needs to be sent according to the topology of the road structure, and the performance of traditional routing based on geographical information is affected.

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