一种链路稳定性预测的分层路由协议

提出了LSP-DOA路由协议.该协议继承了DOA算法的局部路由修复的优点,基于Two-Ray无线传播模型和Friis公式计算链路的稳定性,并构造一个阈值;当链路稳定性小于阈值时,便发出警告,启动路由发现寻找可以及时替换即将中断的链路的新路径.仿真结果表明,与路由协议AODV,DSR和DOA相比,LSP-DOA路由协议提高了系统分组投递率、路由修复成功率和平均路径长度,降低了控制开销和平均端到端延时,能够长时间维持稳定高效的活跃路径,改善了网络整体性能.

A Hierarchical Routing Protocol of Link Stability Prediction

An LSP-DOA routing protocol was proposed， in which the DOA algorithm’s advantages in local routing repairing were inherited. In this protocol， the link stability was calculated based on the Two-Ray radio propagation model and Friis formula， and a threshold value was set. When the link stability was less than the threshold value， a warning would be triggered and the route discovery process was started in order to find out a new path to replace the link which might be interrupted. Simulation results showed that the LSP-DOA routing protocol could reduce control overhead and end-to-end delay， improve packet delivery ratio， route repair success and average route length， maintain a stable efficient route for a long time， thus improve the network performance by comparing with DOA， AODV and DSR.