能量异构无线传感器网络容错拓扑研究

Research on the Fault-tolerant Topology in Energy Heterogeneous Wireless Sensor Networks

该文针对能量异构无线传感器网络中的节点失效问题,提出度分布可调的容错拓扑结构(ADD),并给出了拓扑的度分布表达式,进而通过解析度分布属性对拓扑容错性的影响,得出在能量耗尽与环境损毁综合节点失效情况下可较长时间维持监测任务的网络拓扑。仿真实验结果表明,新的容错拓扑结构获得了更长的生存时间,具有更好的容错性能。

Considering the issue of nodes failure for energy heterogeneous wireless sensor networks, a new topology with Adjustable Degree Distribution （ADD） is constructed, and the formulas of degree distribution is obtained. And then through analyzing the effect of degree distribution characteristics on topology tolerance, the optimM topology is derived, which can assure the finish of network monitoring tasks for long under the integrated failure of nodes resulted from energy exhaust and environment damage. The simulation results show that the topology is more robustness, which provides longer lifetime.