基于节点和链路容量的无线传感器网络级联故障研究

Research on Cascading Failures of Wireless Sensor Networks Based on Node and Link Capacity

无线传感器网络的级联故障模型主要侧重于节点容量对网络性能的研究,忽略了链路容量的影响,从而导致流量指标无法正确反映无线传感器网络的汇聚特征。鉴于此,本文建立了一种受节点容量和链路容量限制的无线传感器网络级联故障模型。首先,根据新的流量指标"方向介数"重新定义了网络负载;其次,通过构建网络级联抗毁性模型,使故障节点可在一定时间延迟后从故障状态恢复。最后,提出了一种路由恢复机制,可以有效改善网络级联故障的抗毁性,并进行了仿真对比测试。结果表明:本文提出的方法可以帮助故障网络在较短时间内得到恢复,使网络状态更加稳定。

The cascading failure model of wireless sensor network mainly focuses on the research of node capacity on network performance and ignores the influence of link capacity,which leads to the fact that wireless sensor traffic indicators cannot correctly reflect the convergence characteristics of wireless sensor networks.In view of this,A cascading failure model of wireless sensor networks limited by node capacity and link capacity is established in this paper.First,the network load is redefined according to the new traffic index‘direction betweenness’.Second,the network cascading survivability model is constructed so that the faulty node can recover from the fault state after a certain time delay.Finally,a route recovery mechanism is proposed,which can effectively improve the survivability of network cascading failures,and a simulation comparison test is carried out.The results show that the method proposed in this paper can help the faulty network to recover in a short time and make the network state more stable.