一种带移动预测的Ad-Hoc网络路由协议

对无线Ad Hoc网络(MANET)路由协议作了简要介绍和比较·基于按需式距离矢量路由协议(AODV),提出了一种在路由发现和路由维护两个阶段都带移动预测的路由协议PAODV·该协议通过GPS系统获知移动节点的位置、速度、移动方向等信息,以链路中相邻节点在最大有效距离范围内的运动预测时间为判断指标,一方面在路由发现阶段建立相对稳定的路由,另一方面在路由维护阶段对链路断开提前进行预测,以降低包的丢失率和重新路由时间开销·仿真结果说明,PAODV比AODV有较低的控制包开销和较高的包投递率·

Routing Protocol with Mobility Prediction in Mobile Ad-Hoc Networks

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 loss 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.