城市场景下基于地理位置的跨层路由协议

Cross-layer geographic routing protocol in urban environment

针对城市场景下车辆多、移动速度快、道路拓扑结构固定导致VANET路由协议通信性能很大下降的问题,提出一种适用于城市场景的基于地理位置的跨层多跳路由协议(city cross-layer multi-hop geography routing,CCMGR)。该协议综合考虑车辆的移动信息和物理层、数据链路层的跨层信息作为数据转发的权值,提出节点选取算法和权重决策方法动态选择权值小的节点进行数据的转发。基于NS-3网络仿真表明,CCMGR路由协议在数据传输成功率和端到端平均延迟性能方面优于GPSR、DSDV、OLSR和DSR协议,适合城市VANETs。

Because of more rapidly moving vehicular and fixed roads,most VANET touting protocols performed bad,this paper proposed a city cross-layer multi-hop geographic routing（ CCMGR） protocol. CCMGR protocol took advantage of mobility information from nodes and cross-layer information from PHY-MAC layer as weight data and selected next node with minimum weight data by node selection algorithm and weighted decision method. Based on NS-3,the simulation results show that proposed CCMGR outperforms GPSR,DSDV,OLSR and DSR protocol in terms of average packet delivery ratio and average delay in urban environment.