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针对移动Ad-Hoc网络AODV路由协议中节点不断运动,链路频繁断开,路由不断重建,造成延时和开销过大、路由失败个数过多等问题,提出一种新的LP-NAODV协议,进行链路时间预测与路由重建,建立预测链路稳定性与备份机制结合的模型.首先使用牛顿均差插值多项式分别进行链路断开时间和节点剩余时间预测;其次选择链路断开时间与节点剩余时间较小者为链路持续时间;最后当链路持续时间小于阈值时启用设置好的备份链路,实现路由重建.NS2仿真结果表明,与AODV、NAODV和PB-AODV三种协议相比,LP-NAODV在发送分组速率改变时,路由失败个数和端到端的延时明显减少,分组投递率明显增大.
AODV protocol is proposed for the AODV routing protocols in Mobile Ad-Hoc Networks. The nodes are constantly moving, the links are frequently disconnected, the routes are continuously rebuilt, resulting in delays and overheads and excessive routing failures. A new LP-NAODV protocol , The link time prediction and route reconstruction are carried out and a model combining the prediction link stability with the backup mechanism is established.Newton mean-square interpolation polynomial is used to predict the link-off time and node remaining time respectively. Second, the link-off time Finally, when the link duration is less than the threshold, the set backup link is enabled and the route is reestablished. The simulation results of NS2 show that with the three protocols of AODV, NAODV and PB-AODV Compared with the LP-NAODV, when the sending packet rate changes, the number of routing failures and end-to-end delay are significantly reduced, and the packet delivery rate is significantly increased.