车载自组织网络中基于车辆密度的双簇头路由协议

摘要

为了降低城市环境下对转发范围内的单个车辆节点运动的感知敏感度,减少源节点到目的节点的平均跳数和传输时延,提出一种车载自组织网络中基于车辆密度的双簇头路由协议(Dual-Cluster-Head Routing Protocol Based on Vehicle Density,DCHPBD).该路由协议根据车辆密度设置簇的大小,在同一路段簇内左右车道分别选出一个簇头,根据最大化生存期原则选择用于转发数据分组的主簇头,另外一个作为备选簇头.仿真结果表明,与CBDRP和EG-RAODV协议相比,所提出的协议簇头生存期较长,平均跳数和平均时延较小,通信性能更好.%In order to reduce the sensitivity of single vehicle node movements in forwarding area of the urban environment and reduce the average number of hops and transmission delay from source node to destination node,a dual-cluster-head routing protocol based on vehicle density in vehicular Ad-hoc networks was proposed.This routing protocol sets the size of cluster according to the vehicle density,one cluster head is respectively selected in the left and right lanes of the same section,the primary cluster head for forwarding data packets is selected according to the maximization lifetime,and the other cluster head is used as an alteration.Simulation results show that the proposed protocol has longer lifetime,smaller average number of hop and average delay,and better communication performance compared with CBDRP and EG-RAODV.