一种高能效的无线传感器网络主动容错机制

摘要

From the perspective of node's actively controlling of error from packet-layer in wireless sensor networks,this paper established the system model for the fault-tolerant problem,and proposed an active fault-tolerant scheme(AFS) for wireless sensor networks.The AFS used the likelihood item and priori item which were estimated by the "window mode"statistical method proposed by this paper,and processed header fields with errors using Bayesian method.Theoretical analysis and simulation results showed that the AFS can undermine the impact of error header and had higher energy efficiency.%从无线传感器网络节点主动对报文层差错进行控制的角度出发,对容错问题建立了系统模型,提出了一种适用于无线传感器网络的主动容错机制AFS.AFS机制利用本文提出的“窗口式”统计方法估计得到的似然项与先验项,使用贝叶斯方法对错误报头字段进行容错.理论分析与仿真结果表明AFS能够削弱报头错误的影响,并具有较高的能效.