车载网络概述及相关路由算法分析.docVIP

车载网络述及相关路由算法分析 Overview of VANET and analysis of relevant routing algorithm 1301 王建帮 201192181 软网1301 张凯源 车载网络综述 1.1相关概念 Intelligent transportation systems (ITSs) VANET中节点可分为vehicles和Roadside Units(RSUs), 它们各自都有接收，，数据以及路由的功能。两者在于，着移动车辆，是不断变化的，RSUs则是固定在路边的节点。 Fig. 1 Inter-vehicle communication Fig. 2 Vehicle-to-roadside communication Fig. 3 Routing-based communication 由于实际应用的需要，在ITSs中存在三种的通信（communication configure-tion）:inter-vehicle, vehicle-to-roadside, and routing-based communication。这三者的实现都依赖于有关周围环境的精确且即时的信息，而要获取这样的信息，则精确的定位系统（如Bluetooth, Ultra-wide Band, ZigBee）的通信协议（如GPS, DGPS）来提供。 Inter-vehicle communication The inter-vehicle communication configuration (Fig. 1) uses multi-hop multicast/broadcast to transmit traffic related in- formation over multiple hops to a group of receivers. Vehicle-to-roadside communicationThe vehicle-to-roadside communication configuration (Fig. 2) represents a single hop broadcast where the road- side unit sends a broadcast message to all equipped vehicles in the vicinity. Routing-based communication The routing-based communication configuration (Fig. 3) is a multi-hop unicast where a message is propagated in a multi-hop fashion until the vehicle carrying the desired data is reached. 1.2应用背景Typically, applications are categorized as safety, transport efficiency, and information or enter-tainment applications. Road safety For safety-related applications, the Vehicle Safety Communications (VSC) consortium identified eight high potential applications : traffic signal violation warning, curve speed warning, emerg-ency electronic brake light, pre-crash sensing, cooperative forward collision warning, left turn assistant, lane-change warning, and stop sign movement assistant. Transportation efficiency For transportation efficiency applications, the Car-to-Car Communication Consortium (C2C- CC) analyzed exemplarily enhanced route guidance a