用于城市交通环境的改进型车载路由优化方法

摘要

In order to optimise the performance indicators of vehicular ad hoc network’s routing protocol including link survival time, throughput and so on in urban traffic environment,on the basis of topology reactive routing protocols,in the paper we introduce the position information of vehicular network nodes,and design an optimisation model for vehicular routing protocol M-AODV which is based on dynamic real-time position information variation.According to the principles of vehicle prior in crossroads and the prior forwarding for those nodes in same directions of their relative positions,the model forwards the control packets based on the discrimination of the position information in routing information table,and gives the C++language-oriented UML modelling diagram and algorithm flow chart of the routing algorithm.It is demonstrated through the simulation on NS2 simulation platform that compared with traditional routing model,this model optimises the performance indicators of the link survival time,delay and throughput in VANETs network.%为了优化城市交通环境中车载自组织网络中路由协议的链路存活时间、吞吐量等性能指标，在拓扑反应式路由协议的基础上，引入车载网络节点的位置信息，设计基于动态实时位置信息变化的车载路由协议优化模型M-AODV。该模型按照十字路口车辆优先和相对位置为同方向节点优先转发的原则，根据路由信息表中位置信息区分转发控制包，并给出该路由算法的面向C＋＋语言的UML建模图及其算法流程图。通过NS2仿真平台仿真表明，与传统的路由模型相比，该模型优化了VANETs网络中链路存活时间、时延、吞吐量等性能指标。