论文部分内容阅读
针对城市车载自组织网络环境中节点分布不平衡,信号传输被障碍物遮挡,目标节点不断移动等问题,提出一个适合城市环境基于地理位置信息的自适应路由协议SAGR(Self-Adaptive Geographic Routing for city environments in vehicular network).SAGR通过远程混合模式被动路由机制SAGR-RM和局部定向受限泛洪路由机制SAGR-LM,将路由过程分成两个层次,增强了路由协议的健壮性以及对目标位置的容错性.通过NS-2软件仿真分析了SAGR协议的性能,结果表明SAGR比现有的基于位置路由协议在数据包传输、端到端延迟和路由开销方面等都有显著的改进.
In order to solve the problem of unbalanced distribution of nodes, obstruction of signal transmission by obstructions and continuous movement of target nodes, a Self-Adaptive Geographic Routing for city (SAGR) algorithm is proposed for urban environment based on geographical location information. environments in vehicular network. SAGR divides the routing process into two levels by SAGR-RM, a passive mixed routing scheme and a localized restricted flooding routing mechanism, which enhances the robustness of the routing protocol and improves the robustness of the target location Fault-tolerance.The performance of SAGR protocol was analyzed by NS-2 software simulation. The results show that SAGR has a significant improvement over the existing location-based routing protocols in packet transmission, end-to-end delay and routing overhead.