基于位置和定向泛洪的车联网区域路由协议  

Location-based and restricted-flooding zone routing protocol for vehicle ad hoc network

作　　者：孙友伟[1] 孙小田[1] 王楠[1] 

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121

出　　处：《西安邮电大学学报》2016年第2期46-51,共6页Journal of Xi’an University of Posts and Telecommunications

摘　　要：为提高车载自组网通信中路由发现和数据传输的效率,对区域路由协议进行改进。在分组中加入节点坐标、速度和时间字段,各节点接收分组后,记录或更新此信息到自身位置缓存表。路由发现阶段,节点位移大于位置更新半径时才更新路由,以此减少路由发现次数;非目的节点查询位置缓存表或路由表后直接应答,以此加快路由发现时间。数据传输阶段,节点通过定向区域转发以限制泛洪,以此降低控制开销。通过搭建车联网场景,对60个节点在5~50m/s速度下进行仿真实验,结果显示,改进方案可使时延降低6%~13%,分组投递率增加6%~20%。另当节点速度大于35m/s时,可使控制开销减少7%~14%。In order to improve the efficiency of data transmission and routing discovery in the process of the vehicle ad hoc network communication,the zone routing protocol（ZRP）is improved by adding coordinates,speed,and time fields in data packets.After receiving the packet,the node records or updates its own position cache table according to the position information.In the route discovery phase,when the position shift is bigger than the radius of the location update,then the node update the route,which can reduce the times of route discovery.According to the location cache table and routing table,the non-destination node replies directly to the route requests,which can reduce the route discovery time.In the data transmission phase,the node can transmit data by restricting flooding range to reduce the control overhead.Simulation experiments are carried out by building the car networking scene on the 60 nodes at5~50m/s speed.Results show that the improved protocol can reduce the delay about 6% ~13%,and increase the packet delivery rate about 6% ~20%.Besides,when the node speed is greater than 35m/s,the control overhead can be reduced by 7%to 14%.

关 键 词：车载自组网 区域路由协议 位置信息 位置缓存表 定向限制泛洪 

分 类 号：TN913.6[电子电信—通信与信息系统]