Resilient method for recovering coverage holes of wireless sensor networks by using mobile nodes

Coverage holes directly reduce network performance and become a key problem of static wireless sensor net-works.A hole-patching method was presented to get the resilient coverage,in which mobile nodes were guided by the boundary nodes of the coverage hole and patched uncovered area in the hole triangle by triangle.Based on geometry theories and mathematic deduction,the moving destination of the mobile nodes was proved to be optimal,and the cover-age of the patched holes was higher than 90%.Simulation results show the coverage,stability and redundancy of the proposed method,and then the availability was compared with some related methods reported recently.