Adaptive broadcast protocol based on distance and speed in vehicle-mounted ad hoc network

Abstract

The invention relates to an adaptive broadcast protocol based on a distance and a speed in a vehicle-mounted ad hoc network, and belongs to the technical field of the vehicle-mounted ad hoc network. The protocol comprises the steps of: S1: for the vehicle-mounted ad hoc network, judging a road type, and respectively aiming at a road segment model and an intersection model, adopting different relay forwarding strategies; S2: solving an intersection misjudgment problem of a distance-based adaptive broadcast protocol in the road segment model by adopting an intersection misjudgment recovery strategy; and S3: simultaneously, introducing a forwarding confirmation mechanism based on a data packet so as to further improve reliability of a broadcast. According to the adaptive broadcast protocol disclosed by the invention, aiming at the road segment model and the intersection model, different relay forwarding strategies are designed; meanwhile, in order to improve reliability of transmission, in the entire data forwarding process, the forwarding confirmation mechanism based on the data packet is introduced, and on the premise of not increasing occupation of an additional message for network resources, forwarding confirmation is carried out by utilizing the data packet, so that reliability of transmission is improved to a certain degree.

Description

technical field [0001] The invention belongs to the technical field of vehicle ad hoc networks, and relates to an adaptive broadcast protocol based on distance and speed in the vehicle ad hoc network. Background technique [0002] VANET (Vehicular Ad Hoc Networks) is formed by combining advanced communication technology, sensor technology, computer technology and other scientific and technological means with road traffic management systems in order to avoid or mitigate the harm caused by traffic accidents. A network that can ensure driving safety and road traffic efficiency. As a product of the development of new wireless communication technology, in the research of routing protocols for traffic safety in vehicular ad hoc networks, emergency messages triggered by dangerous events have strict requirements on the timeliness of data transmission due to the urgency of the information itself. In addition, due to the limited communication range of vehicle nodes, in order to propa...

AI Technical Summary

Problems solved by technology

[0003] Existing routing protocols cannot fully adapt to the characteristics of frequent changes in network topology and high-speed movement of vehicle nodes in vehicular organization networks. In order to fully adapt to the characteristics of frequent changes in network topology and high-speed movement of vehicle nodes in vehicular ad hoc networks, the present invention is based on Based on the adaptive routing protocol based on the distance, while considering the mobility of vehicle nodes, it has very good practical significance

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