基于无人机辅助VANET的两层架构

Two-tier architecture based on drone-assisted VANET

由于车辆具有高机动性、网络拓扑结构多变等特点,导致车辆自组织网络(vehicular Ad hoc network,VANET)中数据包的高效传输成为研究重点之一。针对该现状提出了一种利用无人机和公交车组合形成上层网络来辅助底层车辆数据包传输的两层架构,该结构利用无人机来修复连接,从而提高整体连通性、改善路由过程;其次,结合无人机的运动特点、连通性保证、道路车辆密度等因素构建了无人机的活动策略;最后,通过仿真实验分析了该架构性能。结果显示,提出的架构与其他传统架构相比有效改善了链路质量,平均交付率提高了13.63%,平均最低时延为380 ms。

Due to the characteristics of high mobi-lity and changeable network topology,the efficient transmission of data packets in VANET has become one of the research focuses.In view of this situation,this paper proposed a two-layer architecture,which used the combination of drones and buses to form an upper-layer network to assist the transmission of data packets from lower-layer vehicles.The structure used drones to repair connections,thereby improving overall connectivity and improving the routing process.Secondly,this architecture combined the characteristics of drone’s movement,connectivity guarantee,road vehicle density and other factors to structure the drone’s activity strategy.Finally,it analyzed the performance of the architecture through simulation experiments.The results show that compared with other traditional architectures,this proposed architecture effectively improves the link quality,increases the average delivery rate by 13.63%,and the minimum average delay is 380 ms.