VANETs车联智能网络的紧急消息分发策略研究  

Research on Emergency Message Distribution Strategy for VANETs Vehicle Connected Intelligent Network

作　　者：张亚敏 ZHANG Yamin(Macao University of Science and Technology,Macao 999078,China)

机构地区：[1]澳门科技大学,中国澳门999078

出　　处：《长江信息通信》2024年第9期40-42,52,共4页Changjiang Information & Communications

摘　　要：围绕城市道路的二维车联网场景,考虑车联网环境内不同车辆节点、邻居节点链路的快速变动性,基于现有车联网广播路由协议、路由ENFLOOD广播策略(Extra Nodes Flood,ENFLOOD)等网络通信方式,由车联网内的每个车辆节点周期性发送HELLO紧急消息的数据报文,其他车辆节点采用自动通告方法主动获取路由协议邻居列表的其他车辆节点信息,每个车辆节点并根据上一跳节点广播规则,决定是否转发邻居节点的广播报文,同时针对车联网接入节点的稠密程度,由车辆节点主动计算自身的覆盖权值、设定合适的权值阈值参数,来调整广播报文的传递策略、传输速率。仿真实验表明,ENFLOOD广播策略在紧急消息转发数、广播时延等方面明显优于其他路由协议的广播策略。Focusing on the two-dimensional vehicular networking scenario of urban roads,considering the rapid variability of different vehicle nodes and ncighboring node links in the vehicular networking environment,based on existing vehicular networking broadcast routing protocols,Extra Nodes Flood(ENFLOOD)broadcast stratcgies,and other network communication methods,cach vehicle node in the vehicular networking periodically sends HELLO emergency message data packets.Other vehicle nodes use automatic notification methods to actively obtain information about other vehicle nodes in the routing protocol neighbor list.Each vehicle node decides whether to forward neighboring node broadcast packets based on the previous hop node broadcast rules.At the same time,according to the density of vehicular networking access nodes,the vchicle node actively calculates its own coverage weight and sets appropriate weight thresholds.Parameters are used to adjust the delivery strategy and transmission rate of broadcast messages.Simulation experiments show that the ENFLOOD broadcast strategy is significantly superior to other routing protocol broadcast strategies in terms of emergency message forwarding numbers,broadcast latency,and other aspects.

关 键 词：VANETs车联网 紧急消息分发 邻居节点管理 策略 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]