关键词: 无线网络, AdHoc网络, AODV, 移动预测, 路由协议, 按需路由

Abstract: Introducing the routing protocol of MANET and comparing it with others, a routing protocol with mobility prediction available to both route finding and maintenance stages, which is named as PAODV (Predictable AODV), is proposed on the basis of the ad-hoc on-demand distance vector (AODV). It can acquire such information as the position, velocity and moving direction of moving nodes via GPS, and take the time predicted for the adjacent nodes in link to move within the max. useful communication range as a judgement criterion. Then, build relatively steady routes in route finding stage, and further, predict in advance the moment at which the link just breaks down in route maintenance stage, thus reducing package's lass rate and the overhead due to the time for route restructuring. The simulation results showed that PAODV has lower control overhead and higher package delivery rate than AODV.