一种基于节点间距离提高Ad hoc路由稳定性的方法

Method of Improving Ad-Hoc Route Stability Based on Distance of Neighbor Nodes

移动自组织网络的一个典型特征是网络拓扑的频繁变化,网络拓扑的频繁变化会导致路由不稳定性增加,路由不稳定是导致移动自组织网络性能下降的重要因素之一,因而寻找稳定路由是减小节点移动影响的重要手段。通过测量接收报文的信号功率值来得到节点间距离,并根据得到的节点间距离我们提出了一种可以用来衡量路由稳定性的指标。仿真结果表明采用这种路由稳定性指标跟采用跳数相比可以减少20%左右的路由中断,从而显著的提高网络性能。

A typical character of Ad hoc network is the ever-changing topology, which results in the instability of the routes, This is a common case that causes the performance of the network decreasing. Finding stable route is an effective way to reduce the impact of nodes＇ mobility. The distance of two neighboring nodes was obtained by measuring the power of the signal when receiving route request packet. Based on the distance, a route metric was got which could be used for comparing the stability of different paths found in the route finding process. Simulation results show that using this metric instead of hop-count could reduce the number of route breaks by 20% and improve the performance of the network.