BSCP: Buckup Scheduling Mecanism for Coverage Perserving in WSNs

Coverage is one fundamental problem in wireless sensor networks, it reflects how well an area is monitored or surveyed by sensors. Some applications require a high degree of coverage as it would want a region to be monitored by multiple nodes simultaneously. Nevertheless, the failure of one or several sensors, can paralysis the area coverage unless it was before completely covered.In this paper we will investigate the restoration of the area coverage under unexpected node failure with reduce energy consumption. In fact, we adopt new recovery mechanism where every active node selects a subset of its neighbors (backup cover) and schedules them to periodically wake up according to some optimization parameters.