A geographic routing protocol based on trunk line in vanets

Abstract

To make full use of historical information and realtime information, a Trunk Road Based Geographic Routing Protocol in Urban VANETs (TRGR) is proposed in this paper. This protocol aims to solve the problem of data acquisition in traditional trunk coordinated control system. Considering the actual physical characteristics of trunk lines, it makes full use of the traffic flow of the trunk lines and the surrounding road network, provides a real-time data transmission routing scheme, and gives a vehicle network routing protocol under this specific condition. At the same time, the TRGR protocol takes into account the data congestion problem caused by the large traffic flow of the main road, which leads to the corresponding increase of the information the flow of the section, and the link partition problem caused by the insufficient traffic flow. It introduces different criteria for judgment and selection, which makes the TRGR protocol more suitable for the application of coordinated control of the main road in the urban environment. Simulation results show that the TRGR protocol has better performance in end-to-end delay, delivery rate and routing cost under the scenario of urban traffic trunk lines comparing with other IOT routing protocols. TRGR protocol can effectively avoid data congestion and local optimum problems, effectively increase the delivery rate of data packets, and is suitable for routing requirements in this application scenario.