A multi-hop broadcasting method for vehicle ad hoc network based on location competition

Abstract

The invention relates to a multi-hop broadcasting method for a vehicle-mounted ad hoc network with position competition, and belongs to the technical field of communication. The method includes the following steps: Step 1: Dynamic clustering of connectivity stability: including performing clustering on nodes, completing clustering based on connectivity stability, filling broadcast data packets and broadcasting, and performing broadcast forwarding after nodes receive broadcast packets The method realizes the competitive forwarding of the broadcast packet; Step 2: the sending of the multi-hop broadcast packet: including initiating a broadcast process when the active node in the network needs to broadcast the data of the whole network; Step 3: the relay node competes for forwarding: Including adopting different relay node competitive forwarding strategies for different road models on the basis of network node clustering, mainly divided into the competitive selection of relay nodes under the road section model and the competitive selection of relay nodes under the intersection model. The method effectively reduces the redundancy of the multi-hop broadcast and improves the reliability of the broadcast. At the same time, the broadcast carrying and forwarding strategy for the isolated cluster head of the network is added to ensure the broadcast reliability in the node sparse area or the network "hole" area.

Description

technical field [0001] The invention belongs to the technical field of communication, in particular to the field of vehicle ad hoc network technology, and relates to a multi-hop broadcasting method for a vehicle ad hoc network with position competition. Background technique [0002] In recent years, the urgent need for traffic intelligence and the rapid development of wireless communication technology have given birth to the combination of the two. As part of the initial research on intelligent transportation systems, vehicle ad hoc network technology has become an interdisciplinary subject in academic and industrial research in recent years. hot topics. The vehicle ad hoc network studies the communication between vehicles. Different from the traditional wireless mobile ad hoc network, the vehicular ad hoc network is a wireless ad hoc network based on inter-vehicle communication. It consists of two parts: the vehicle on the road Communication between vehicles, wireless comm...

AI Technical Summary

Problems solved by technology

Although this method can try its best to ensure that the data reaches every node in the network, and the method is simple and effective, it brings a series of problems, mainly in the following aspects: First, since each node repeatedly broadcasts, this brings a lot of problems to the network. It brings a lot of redundant information, which is easy to form a broadcast storm (Broadcast Storm), resulting in a waste of resources; second, the forwarding time of adjacent nodes is highly consistent when broadcasting data, which is likely to cause channel competition and collision; third, The existence of a large number of hidden and exposed terminals affects the reliable distribution of data

Traditional wireless mobile ad hoc network broadcast protocols are also not suitable for vehicular ad hoc networks due to differences in application environments

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