基于动态路径规划的车载自组织网络贪婪路由协议

Greedy routing protocol for vehicle self-organizing network based on dynamic path planning

车载自组织网络(VANETs)作为智能交通的通信基础,因其固有特性导致在城市交通场景中存在数据传输性能下降快、数据包丢失等问题。提出一种基于动态路径规划的贪婪路由(VGRP)协议,利用麻雀搜索算法(SSA)找寻最优路径,对节点进行动态路径规划,并引入路由度量值(RM)和链路生存时间(LET)等参数,对贪婪路由的转发策略进行优化。通过NS-2对协议性能进行仿真实验,结果表明VGRP协议的数据包投递率、平均端到端时延和吞吐率均具有良好的鲁棒性。

As the communication basis of intelligent transportation,VANETs,as the communication basis of intelligent transportation,have problems such as rapid data transmission performance degradation and data packet loss in urban traffic scenarios due to their inherent characteristics.This paper proposes a greedy routing(VGRP)protocol based on dynamic path planning,which uses the sparrow search algorithm(SSA)to find the optimal path,performs dynamic path planning on nodes,and introduces routing metric(RM)and link lifetime(LET),other parameters to optimize the forwarding strategy of greedy routing.The performance of the protocol is simulated through NS-2,and the results show that the data packet delivery rate,average end-to-end delay and throughput rate of the VGRP protocol have good robustness.