Intersection routing method in vehicle self-organized network on the basis of path segment length

Abstract

The invention discloses an intersection routing method in a vehicle self-organized network on the basis of the path segment length. The method solves the problems that communication of a forwarding path cannot be guaranteed, and the route hop count is increased because the situation that the path segment length is smaller than the communication radius of wireless signals is not taken into consideration. The method specifically comprises the steps that first, an intersection node calculates the communication degree between every two adjacent path segments; second, a data packet is forwarded to an intersection node or a neighbor node closest to a target node according to the communication degree between very two adjacent path segments; finally, the process above is repeated till the data packet is forwarded to the target node. According to the intersection routing method in the vehicle self-organized network on the basis of the path segment length, the communication degree between every two adjacent path segments is calculated with different methods according to the path segment length, the intersection node which is communicated and closest to the target node is selected preferentially, the phenomenon that a data packet is forwarded to a path segment which can be easily interrupted can be effectively avoided, network delay is reduced, and the delivery rate of the data packets is increased.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to an intersection routing method based on road section length in vehicle ad hoc networks (VANETs). The present invention can be used for routing decision-making in urban scenes. According to the length of the road section, different methods are used to calculate the connectivity of the adjacent road sections of the intersection, and the intersection nodes that are connected and close to the destination node are preferentially selected, which can effectively avoid forwarding data packets. On road sections that are prone to interruption, the network delay is reduced and the overall performance of the vehicle self-organizing network is improved. Background technique [0002] Vehicle ad hoc network is a research direction with great application value in mobile ad hoc network, and it provides an effective solution for the development of intelligent transportation system. Th...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this protocol is that the forecast-based intersection routing protocol GpsrJ+ does not consider the connectivity of the road section, and only selects the forwarding direction according to the one-hop neighbor node of the intersection, and may forward the data packet to the unconnected road section. Cause network interruption, so that the data packet cannot continue to be transmitted

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