一种VANET交互协助式通信策略

An Interactive Assistant Communication Scheme of VANET

在VANET网络中,在V2I与V2V的网络通讯模式下,一辆汽车在高速公路上行驶,当此车行驶到两个基站之间的网络信号盲区时,恰好被迫停驶或抛锚。为了协助此车最大程度地维持网络通讯,我们提出了一种交互式网络通讯策略,它征用过往车辆的部分通讯能力协助分发数据,以交互的方式为目标车辆服务。我们用NS2对此策略进行了模拟与仿真,将MVA策略的性能与DSDV、AODV、DSR路由协议在VANET网络盲区中进行动态路由的通讯表现性能进行比较。实验结果表明:AODV与DSR协议在VANET盲区中的网络通讯表现较差;与DSDV协议相比,本策略在网络流量与平均网络带宽性能表现上比DSDV协议有较大幅度的提升。

In this paper, we study such a scenario, in the network consisting of both V2I and V2V communication, a vehicle is driving on highway, and it is trapped because of various reasons. In order to assist this trapped vehicle to maintain its network communication as possible, we propose an interactive network model and relevant scheme, which expropriates part of communication capabilities of other passing vehicles to assist the trapped vehicle to propagate data in an interactive way. We simulate the MVA model and scheme in NS2 and compare the proposed MVA scheme with DSDV, AODV, DSR routings in the blind area of VANET. The simulation results show that the AODV and DSR routings perform not well in the blind area of VANET. And the proposed MVA scheme achieves higher improvement in the average amount of network flow performance than DSDV routing.