摘要
在移动自组网中,节点的移动导致拓扑动态变化,已经建立的路由时刻存在中断的可能,而传统的AODV路由协议中的路由修复方法开销大、时延长。针对这一问题,提出了一种基于链路中断预测的改进路由算法。该算法在链路中断之前启用备用节点,尽量避免路由修复;在链路中断后,首先在本地进行链路修复,不成功再逐层由上游节点发起路由搜索。仿真实验结果表明,与传统AODV相比控制开销降低了40%,端到端时延减少了25%,提高了网络性能。
In mobile ad hoc networks （MANET）, due to the changing topology and limited bandwidth, link break frequently oc- curs in mobile ad hoc networks. In traditional AODV, the source node broadcasts RREQ message to find a new route to the desti- nation when the link break occurs. Control overhead and long packet delay are high. In this paper we propose an improved routing repair algorithm（RP-AODV）. The intermediate node, which detects the link break, to repair the break route. Once the intermediate node cannot repair the route in time, the backward pre-hop node tends to find a new route instead. The simulation is done through network Simulator-2, Results show that RP-AODV performs better in terms of routing overhead, end to end delay than classic AODV. the control overhead ratio is decreased by 40% , and the end to end delay is decreased by 25%. RP-AODV is quite suitable for such a dynamic network.
出处
《电子技术应用》
北大核心
2013年第7期93-96,共4页
Application of Electronic Technique
