An improved method of gpsr protocol in vehicle network based on road network and qos model

Abstract

The invention discloses a vehicular network GPSR (Greedy Perimeter Stateless Routing)protocol improvement method based on a road network and a QOS model. The method comprises the following steps: stepS1, establishing a road network model, and inquiring coordinates of a source node and a destination node and the attribute of a road section by the source node; step S2, if the destination node is within a communication range, then directly forwarding; otherwise, enabling a greedy forwarding mode; step 3, during the forwarding process, calculating to obtain QOS attribute data, measuring the service quality of a communication link, and generating a candidate forwarding node list; step S4, if the candidate forwarding node list is not empty, continuing greedy forwarding; otherwise, enabling a carry-forward mechanism in a route recovery strategy; step S5, enabling a perimeter recovery mode to select a forward road section when a data packet falls into a local optimal intersection; and step S6, when the data packet crosses the local optimal intersection, repeatedly executing steps S2 to S5 until the destination node is reached. The vehicular network GPSR protocol improvement method based on the road network and the QOS model provided by the invention improves the link quality of a GPSR protocol, reduces the influence of speed on the delivery rate, and the low-node density adaptabilityis good.

Description

technical field [0001] The invention relates to the technical field of vehicular ad hoc network communication, in particular to a method for improving the vehicular network GPSR protocol based on road network and QOS model. Background technique [0002] The Vehicular Ad-Hoc Network (VANET) realizes intelligent traffic collaborative control through information sharing between vehicles, vehicles, and vehicles. In the future intelligent transportation system, wireless technology plays a vital role [2]. A large amount of data such as vehicle moving speed is aggregated and broadcast periodically to serve the intelligent transportation system. Long-distance data transmission is required in the Internet of Vehicles, so routing algorithms must be considered. Routing protocols with short delays and high delivery rates can receive safety information in a timely manner and prevent traffic congestion. [0003] Ad-Hoc network topology has no center and is often in dynamic changes, whic...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a GPSR protocol based on road network and QOS model for the defects of low link quality, high speed influence of delivery rate and poor adaptability to low node density in the prior art under urban traffic conditions. Improvement Method of Vehicle Network GPSR Protocol

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