车联网中多跳广播转发节点选择研究

在车载自组织网络中(VANET),大部分应用采用多跳广播来交换道路交通信息,其中最典型的为泛洪广播,但是随着车辆和节点的增多泛洪广播会引起广播风暴,导致信道阻塞。结合模糊逻辑,提出一种基于接收节点的多跳广播方案,依靠接收节点的覆盖范围、信道忙闲比和移动因素,由模糊逻辑系统决定当前节点是否具备转发资格。通过于其它方案的仿真对比验证,所提出的方案在投递率与时延方面具有更好的性能,可有效提高信道利用率,降低广播风暴风险。

Research on Multi-Hop Broadcast Forwarding Node Selection in VANET

In VANET,most applications use multi-hop broadcasting to exchange road traffic information,the most typical of which is flooding broadcasts,but as vehicles and nodes increase,flooding broadcasts can cause broad-cast storms,resulting in channels block.In this paper,based on fuzzy logic,a multi-hop broadcast scheme based on receiving nodes is proposed.Based on the coverage of the receiving node,channel busy-to-spare ratio and mobility factors,the fuzzy logic system determines whether the current node has the forwarding qualification.Through the sim-ulation and verification of other schemes,the scheme proposed in this paper has better performance in terms of deliv-ery rate and delay,which can effectively improve channel utilization and reduce broadcast storm risk.