Internet of vehicle opportunistic routing method based on geographic position

Abstract

The invention discloses an Internet of vehicle opportunistic routing method based on the geographic position. According to the method, different forwarding strategies are selected according to the quantity of neighbor nodes surrounding a vehicle node, if the quantity of neighbor nodes is relatively large, greedy forwarding strategies are selected to reduce copy spreading and network resource waste; if the quantity of neighbor nodes is relatively small, a distribution mechanism is selected for diffusion and transmission, and a message delivery rate is improved. When a relay node is selected, forwarding weight of each vehicle candidate node is acquired through calculation according to the geographic position of the node, the forwarding history and the speed information, and the node having the largest weight is taken as the optimal relay node. According to the method, different forwarding strategies are selected according to different real-time environments, the optimal relay node can be acquired through calculation according to a weight calculation formula, when the quantity of neighbor nodes is relatively large, time delay can be reduced, and network cost is reduced; when the quantity of neighbor nodes is relatively small, a message delivery rate can be improved, the distribution mechanism is selected for strategy diffusion and transmission, and pressure onto network resources can be avoided.

Description

technical field [0001] The invention relates to the communication field of the Internet of Vehicles, in particular to a geographical location-based opportunistic routing method for the Internet of Vehicles. Background technique [0002] The full name of the Internet of Vehicles is Vehicular Ad-hoc Networks (VANET), which is a research hotspot in the field of Intelligent Transportation System (ITS). Vehicles are used as mobile nodes to automatically connect with surrounding roadside units. Establish a mobile communication network, which can realize V2V (Vehicle to Vehicle) communication and V2I (Vehicle to Infrastructure) communication. It mainly provides three types of services: traffic environment information service, safe driving and fault diagnosis, and entertainment communication service, so as to realize intelligent collaboration between vehicles and between vehicles and the environment, and build a safe, robust, fast and accurate intelligent transportation system. [...

AI Technical Summary

Problems solved by technology

[0004] In the current geographic location-based opportunistic routing, the delivery rate of single-copy routing is not high, and the delay is large. Therefore, in order to maximize the delivery rate of packets, the number of copies is usually increased in the network, but too many copies will cause network Bandwidth brings certain pressure, resulting in network congestion, and even system crashes in severe cases

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