【摘要】 为了提高城市场景车用自组织网络通信的高效性,提出了基于道路网络连通性和交叉路口的路由协议。通过分析城市场景车用自组织网络的特征,构建基于道路交通网络连通概率模型,并根据该模型选择连续道路交叉路口构成最优路径;数据包沿这条最优路径传输,道路段内采用优化的地理转发策略传输数据包;为了应对无线信号在交叉路口拐角处急剧衰减引起的链路突然断裂,选择最佳的队列头负责交叉路口拐角处数据包的有效转发。仿真结果表明,该路由协议能够有效增强网络的稳定性,提高网络性能,并减小路由断裂事件。更多还原

【Abstract】 To improve the communication efficiency for the urban vehicular ad hoc network,a routing protocol based the connectivity of roads network and intersections is presented.The model of road network connectivity probability is established and it is used to selects continuous road intersections through which a packet must pass to reach the destination.The improved geographical forwarding is used to transfer packets between two intersections.To avoid the risk of sudden link-breakage due to the signal propagated sharply degrade behind the corner of intersections,The optimal dynamic queue-header which is used as a relay node to forward packets cross corner is selected.The performance of the scheme is evaluated through computer simulations.Evaluation results show the significant performance improvement in comparison with other existing routing approaches.更多还原