【摘要】 Ad Hoc网络动态的拓扑结构变化使得路由经常失效从而造成网络性能的下降,本文对DSR(Dynamic Source Routing)路由协议的缓存管理进行了研究,提出了通过GPS(GlobalPositioning System)系统获得移动结点的位置及速度信息,预测路由的生存期,并基于该生存期对路由缓存进行管理,该算法可以提高缓存中路由信息的准确率,较好的适应了Ad Hoc网络动态的网络拓扑结构变化.通过仿真实验,验证了该方法可以有效提高分组投递率,同时降低路由开销及传输延迟.更多还原

【Abstract】 Dynamic topology of wireless Ad Hoc networks causes routes to break frequently,which results in significant performance degradation of networks.In this paper,the cache management of DSR(Dynamic Source Routing) protocol is researched,then a new routing cache management is proposed and it is based on the routing expire time predicted by the moving node location and velocity from GPS(Global Positioning System).This algorithm can improve the routing accuracy,and adapt to the dynamic topology of Ad Hoc networks.The simulation result shows this algorithm improves packet delivery ratio,and decrease route overhead and delay.更多还原