Recovery of holes problem in wireless sensor networks

The existence of Internet, communications and information technologies, combined with recent Micro Electro Mechanical System advances, is leading the way for a new generation of low-cost sensors and actuators, which aim to achieve a high degree of spatial and temporal resolution and accuracy. The autonomous nature of sensor networks makes it of significant importance in various hazardous application such as battlefield surveillance, disaster management, structural health monitoring etc. Besides the numerous capabilities there are several issue which can significantly degrade the network functionality such as energy and resource constraint, holes problem etc. The problem of network holes is an important issue to consider. In this survey paper, we aim to provide the detailed overview of sensor holes, its causes, impact on the network performance and challenges related to this problem. We would also discuss some approaches which have been provided to overcome this problem. In this paper we aim to propose an approach which can detect and recover the coverage hole, which can result in the disconnection of the sensor networks.