摘要
分析了AODV协议的工作过程及其路由表维护机制。在此基础上,提出了一种可用路由延长生存期的思想。当一条路由信息在一定时间间隔内未被使用时,并不删除该路由信息,而是检查该路由是否可用,若可用,则增加该条路由的生存期,否则删除,等到需要到目的节点的路由时,再重新查找。这样就避免了可用的非活跃路由因过期而被删除,当需要再次向目的节点发送数据时,可直接使用该路由,避免路由重新查找。NS2的仿真实验结果表明该方法在存在相同节点多次连接情况下对减轻网络流量负担和改善网路延时具有一定的积极意义。
Analyzes AODV routing protocol and its routing table management mechanism. Based on this, propose to prolong the lifetime of expired. Needn＇t to delete the routing information when it isn＇t used during an interval,but to check whether can use it or not. If can use it, prolong its lifetime, otherwise, find again. So this avoids finding route to destination again if the valid and expired route to it not deleted. The simulation results by NS2 show that our modified mechanism plays an active role in reducing network overhead and shortening net- work delay.
出处
《计算机技术与发展》
2009年第7期44-47,共4页
Computer Technology and Development
