基于LTE的车载网安全消息传播的簇路由

LTE-assisted clustering routing protocol for VANET safety message dissemination

为提高车联网(vehicle ad hoc networks,VANETs)安全消息的传播性能,提出基于LTE辅助的VANETs安全消息传播的簇路由。依据多跳稳定簇MSC(multi-hop stable clustering)算法构建不同簇,利用MSC算法计算车辆与邻居车辆的平均相对速度,通过平均相对速度值选择簇头CH(cluster head);通过CHs间簇信息的交互,进行簇融合,减少簇个数;充分利用长期演进(long-term evolution,LTE)连通CHs间的通信,提高安全消息传播性能。仿真结果表明,MSC算法增强了簇头寿命,提高了簇稳定性,提高了安全消息传播成功率,降低了时延。

To improve performance of safety message dissemination of vehicle ad hoc networks（VANETs）,LTE-assisted clustering routing protocol for VANET safety message dissemination was proposed.Vehicles were clustered based on an approach named multi-hop stable clustering（MSC）algorithm.The features of MSC were adopted to do cluster head（CH）selection using the relative mobility metric calculated as the average relative speed with respect to the neighboring vehicles.Clusters were merged by exchanging cluster information among CHs to minimize the number of clusters.The connectivity among CHs was done using LTE,and the performance of disseminating safety message was improved.Simulation results show that MSC algorithm prolongs the network lifetime of CH,and increases its stability.Moreover,the safety message delivery ratio is increased,and the delay is reduced.