无线传感器网络可靠性建模研究

针对无线传感器网络(WSN)系统规模大、易失效、分布式的特点，首先给出了WSN系统的网络模型和任务模型，建立了基于任务的WSN系统可靠性模型，实现了从单个任务的局部可靠性评价到系统全局可靠性评价方法，最后针对WSN的典型簇拓扑结构，给出了建模实例。该方法为WSN系统设计阶段所进行的任务级划分与拓扑结构的选择和优化提供依据和参考。

On Reliability Modeling for Wireless Sensor Networks

Taking aim at the features of wireless sensor network (WSN) system, such as large scale, easy iauure and distributive type, the network model and the task model of WSN system were given, the reliability model of the system based on the task was established, to realize the reliability estimation from a single task to the whole system. Taking aim at the representative cluster topology structure of WSN，a modeling example was given. The presented method provides basis and reference for the task division and the selection and the optimization of topology structure in the phase of WSN system de?sign.