基于节点级联失效的WSNs动态容错拓扑控制研究

Research On Wsns Dynamic Fault-Tolerant Topology Control Based On Node Cascading Failure

采用传统拓扑控制方法存在容错性弱,无线传感器网络使用寿命短的问题,无法满足人们需求,提出了一种基于节点级联失效的WSNs动态容错拓扑控制方法。根据节点级联失效传感器结构,构建能量耗尽和随机失效数学模型;针对能量耗尽和环境恶劣造成节点级联失效进行了量化分析,构建可以调整的动态容错拓扑结构,依据失效模型,设定最优容错度量指标,并由此实现对节点级联失效WSNs动态容错拓扑的控制。通过实验验证结果可知,该研究方法具有较强容错性,并且能够有效延长无线传感器使用寿命。

The traditional topology control method is weak in fault tolerance and short in service life of wireless sensor network,and can not meet people's needs.A WSNs dynamic fault-tolerant topology control method based on node cascading failure is proposed.According to the node cascading failure sensor structure,construction of energy depletion and the random failure model;in view of the energy depletion and environmental bad nodes caused by cascading failure is analyzed to construct the dynamic fault-tolerant topology structure can be adjusted,based on the failure model,setting the fault-tolerant measure,and thus realize the control of cascading failure node dynamic fault tolerant topology WSNs.The experimental results show that the method has strong fault tolerance and can effectively prolong the service life of wireless sensor.