无线传感网中基于唤醒机制的覆盖洞修复方法

摘要

The failed nodes lead to the phenomenon of coverage holes in wireless sensor networks, which is due to the exhausted energy and destroyed environment. In this paper, the Directed Furthest Node First Policy (DFNFP) was proposed to solve this problem. The method would repair coverage holes by the principle that the boundary nodes of coverage holes select from its neighbor table the non-active node farthest from the center to replace the failed node and activate the replacement node. The simulation results show DFNFP can maintain better quality of coverage, and make full use of energy resources, and extend lifetime of networks. Moreover, DFNFP is superior to Best Fit Node Policy ( BKNP) in average time and energy consumption for repairing the coverage holes.%针对无线传感器网络中节点因能量耗尽或环境破坏而失效导致产生覆盖空洞现象,提出了一种基于唤醒机制的定向最远非活跃邻节点优先覆盖洞修复策略(DFNFP).该方法通过覆盖洞边界节点从其邻接表中选择距离其中心最远的非活跃节点替换失败节点,并激活替换节点达到修复覆盖洞目的.仿真结果表明,该方法能保证较好的网络覆盖质量,充分利用了能量资源,延长了网络的生存周期,且在修复空洞的所需平均时间和能耗方面,DFNFP优于最佳匹配节点策略(BFNP).