基于概率的车载网自适应广播协议

An Adaptive Broadcast Protocol Based on Probability for Vehicles Ad Hoc Networks

综合分析现存车载自组网的广播通信方案,发现它们普遍存在重播信息冗余的现象,而这通常会导致广播风暴问题。提出一种新的基于概率的自适应广播方案,分别从交通繁忙和交通稀疏两种场景出发,通过重新定义相应节点广播信息的概率,在提高信息的可达性的同时降低节点广播信息数量,实现高传送率和减少广播冗余的目的。模拟试验显示,相较于现存主流概率广播方案,所提出的方案的信息可达性和低广播冗余等为代表的多个性能指标均有显著提高。

The existing schemes of broadcast communication of vehicle ad hoc networks are comprehensively analyzed,which found that there is redundancy of broadcast information which usually leads to broadcast storm.A new adaptive broadcast scheme is presented based on the probabilistic probability.This scheme starts from the two scenarios of traffic density and traffic sparse respectively.By redefining the broadcast probability,reducing the number of broadcast,and improving the information reachability,the high transmission ratio is achieved and broadcast information redundancy is reduced.Simulation tests show that the scheme has much improvement on the performance metrics of reachability and less broadcast redundancy,compared with the existing wellknown probabilistic schemes.