摘要
针对城市车辆自组织网络应用需求,提出一种低延时路由协议。该路由协议以城市交通网络模型为基础,首先从各道路段上寻找显著节点,然后估计显著节点之间的链路生存时间,接着从交叉口区域寻找最优的中继节点。一旦找到中继节点便开始广播道路段评价数据包,依据传输延时计算每一个道路段的权重值,最后在路由构建阶段依据道路段权重和有效期选取最优传输路径,实现数据的低延时传输。大量的仿真实验结果表明,与常用的GPSR和GPSR-R路由协议相比,该路由协议不仅端到端平均延时大幅降低,而且报文送达率高、网络开销小。
A low-delay routing protocol is proposed for appl icat ion demand of city vehicle ad hoc networks. Based on the model of city traffic network, the new routing protocol look for the significant nodes on each road-section firstly, then it estimated the lifetime of links between two significant nodes, and found the optimal relay nodes on intersection. Once finding the relay node, the algorithm will begin broadcasting the road-section evaluation packet and calculate a weight value for every road-section according to transmission delay. In the end, it selects the optimal transmission path according to weight and validity of road-sections in routing building stage and achieve low-delay transmission for data. Experiments show that the new routing protocol can not only reduce the average end-to-end transmission delay significantly, but also obtain high packet delivery rate and low network overhead compared with the commonly used GPSR and GPSR-R routing protocols.
出处
《计算机应用与软件》
2017年第8期270-275,共6页
Computer Applications and Software
基金
国家高技术研究发展计划项目(2009AA012420)
广东省科技计划项目(2014A020218016)
关键词
车辆自组织网络
路由协议
传输延时
链路生存时间
显著节点
Vehicle ad hoc networks Routing protocol Transmission delay Link l ifet ime Significant node
