VANET城市场景下的十字路口感知的地理路由  

Intersection Aware-based geographical Routing in urban vehicle Ad Hoc Networks

作　　者：简磊 陈元亨[2] 陈莹莹 JIAN Lei;CHEN Yuanheng;CHEN Yingying(School of Electrical and Electronic Information Engineering,Jinjiang College,Sichuan University,Meishan 620860,China;College of Electronics and Information Engineering,Sichuan University,Chendu 610065,China)

机构地区：[1]四川大学锦江学院电气与电子信息工程学院,四川眉山620860 [2]四川大学电子信息学院,四川成都610065

出　　处：《电视技术》2018年第11期87-92,共6页Video Engineering

基　　金：四川省教育厅科研项目(编号17ZB0255)

摘　　要：在车载网络(Vehicle Ad Hoc Networks,VANETs)中,车辆的高速移动导致车辆密度的频繁变化,阻碍了车间通信的连续性。VANETs中的路由协议必须避免低密度的路段转发数据包。为此,针对VANETs的城市环境,提出基于十字路口感知的地理路由(Intersection Aware-based geographical Routing,IAGR)。在选择下一个十字路口时,IAGR路由考虑了路段状态,并为数据包提供最优路由。同时,IAGR路由利用链路连通率、密度、路段负载以及通往目的地的累加距离信息估计路段状态。当数据包到达十字路口时,IAGR路由依据路段状态,选择最优的路段传输数据包。仿真数据表明,提出的IAGR路由的数据包传递率、传输时延和通信开销性能优于同类的基于十字路口连通感知路由(Intersection-based Connectivity Aware Routing,iCAR)和流量定向路由(Traffic Flow-oriented Routing,TFOR)。In Vehicle Ad Hoc Networks(VANETs),high vehicular mobility causes frequent changes in the density of vehicles,discontinuity in inter-vehicle communication,and constraints for routing protocols.The routing must avoid forwarding packets through segments with low network density.Therefore,Intersection Aware-based Geographical Routing(IAGR)is proposed in this paper.IAGR provides an optimal route for forwarding the data packets toward their destination by considering the traffic segment status when choosing the next intersection.At the same time,IAGR presents a new formula for assessing segment status based on connectivity,density,load segment,and cumulative distance toward the destination.When the packet reaches an intersection,IAGR adopts intersection routing to choose the most suitable close segment for forwarding packets.Simulations result shows that IAGR outperforms in terms of packet delivery ratio,packet delivery delay,and communication overhead.

关 键 词：车载网络 地理路由 十字路口 路段 信息收集包 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]