Ad Hoc网络中分布式自适应缓存器更新算法

Research on Distributed Adaptive Cache Update Algorithm in Mobile Ad Hoc Network

为使移动Ad Hoc网络中路由缓存器快速有效地适应拓扑变化,缓解由于路由过时引起TCP(Transmis-sion Control Protocol)拥塞控制,导致吞吐量和带宽利用率降低的情况,提出一种新的没有容量限制的缓存器结构——Cache Table,及分布式自适应缓存器更新算法,通过自适应的方式主动更新路由缓存器,减少因过时路由引起的路由失效。仿真结果表明,该算法与传统的按需路由相比,路由失效总数和分组丢失明显减少,Ad Hoc网络中的TCP性能得到提高。

In order to make route caches in on-demand routing protocols adapt to topology changing quickly and efficiently,revive TCP（Transmission Control Protocol） Congestion Control mechanism caused by cache staleness that lead to seriously degrade of TCP throughput and Bandwidth Utilization,a new route caches—Cache Table and distributed adaptive cache update algorithm is proposed.Through adaptive approach to actively update route caches,reducing route failures by cached routes stale.Compared with the originally protocol this algorithm can decrease Packet loss and routing overhead,improve TCP performance.