无线传感器网络分布式概率覆盖保持协议

Distributed probabilistic coverage-preserving configuration protocol for wireless sensor network

覆盖配置能有效缓解无线传感器网络中节点能量受限的问题,但现有的研究多是基于物理覆盖,这与实际的信号传播特点不符。针对这一问题,提出了分布式传感器网络概率覆盖保持协议(DPCCP),该协议基于概率探测模型,利用Voronoi划分在节点本地执行概率覆盖判断算法。仿真实验中,将DPCCP嵌入LEACH路由协议,形成LEACHE协议,验证算法效率。仿真结果表明,DPCCP在保持网络覆盖度的同时,可关闭大量冗余节点,有效地延长了网络寿命。

Coverage configuration is an effective method to alleviate the energy-limitation problem of sensor nodes in wireless sensor networks. Most of current researches were based on physical coverage model which is inconsistent with the realistic characteristic of signal propagation. Therefore, a distributed probabilistic coverage-preserving configuration protocol （DPCCP） was proposed. This protocol is based on probabilistic detection model and used Voronoi diagram to judge the probabilistic coverage degree on sensor nodes. In the simulation, LEACHE was presented by embedding DPCCP into LEACH seamlessly without any modification of the original workflow to validate the efficiency of the algo- rithem. Simulation results show that DPCCP can effectively reduce the number of active sensor nodes and prolong the network lifetime on the condition of coverage-preserving.