基于组移动模型的链路生存时间预测

Prediction of Link Expiration Time based on Group Mobility Model

战术Ad Hoc网络拓扑结构的动态变化,导致了重复路由操作频繁发生。基于组移动模型的特点,不依赖GPS等辅助设备获得节点相关参数,提出了一种新的链路生存时间预测算法,并将其应用于路径选择,避开生存时间短的链路,选择一条由最长生存时间链路组成的路径,以减轻拓扑变化对路径稳定性的影响。仿真表明,该算法能够有效地降低数据的丢包率和端到端的时延,减少路由的重操作次数,提高了路径的稳定性。

Dynamic changing of the topology for tactical Ad Hoc network would lead to the frequent happening of repeated routing operation.Based on the characters of group mobility model,and under the condition of not relying on GPS for acquiring the relevant parameters of the nodes a new prediction mechanism for link expiration time is proposed.In the process of route choice,it tries to pick up the path with the longest existing time link,thus to reduce the influence resulted from the topology change.The simulation shows that this algorithm could efficiently reduce the repeated operation efficiently,decrease the ratio of lost packages and the delay between terminal nodes,and the increase the path stability.