摘要
移动AdHoc网络是一种高度动态的无线网络,路由成为其实际应用中必须解决的关键问题。传统按需式路由算法的路由维护机制,只是在链路中断后才触发路由查找,而探测断链与重新建立一条新的链路的开销非常大。本文提出了一种基于AODV协议的先发式路由维护机制,能够在通信过程中根据链路信号强度实时监测链路稳定性,预测链路断开趋势,并在链路断开之前找出一条更加稳定的链路进行替代,减轻了在断链之后进行修复而造成的数据包的延迟与不稳定性。仿真实验表明,这种新的路由维护机制明显提高了网络多方面的性能。
For mobile ad hoc network has no support infrastructure and shows a highly dynamic feature, routing becomes a key problem to he solved. The traditional route maintenance mechanism of the on-demand routing algorithms initiate route discovery only after a path breaks, incurring a significant cost in detecting the disconnection and establishing a new route. In this paper, a preemptive route maintenance mechanism,which can monitor the changes of the link stability in a re al-time way, predict the link disconnect trends in the course of communication through the signal strength, and find a new stable path to replace it before disconnection, is presented, which reduces the packet latency and jitter. Simulations show the new route maintenance mechanism results in a substantial performance improvement in the ad hoc network.
出处
《计算机工程与科学》
CSCD
北大核心
2009年第7期1-4,共4页
Computer Engineering & Science
基金
现代通信国家重点实验室基金资助项目(9140c110206070c11)
