Comparative study of fault recovery techniques in Wireless Sensor Network

Wireless Sensor Network (WSN) is an integration of simple sensing, processing, storage and communication technology into cheap miniature sized devices. Distributed WSN is used for ambient intelligence, where tiny senor nodes sense, process and communicate signals to the base station (BS) for smart decision making. Nodes are deployed randomly in any unattended area for monitoring any physical attribute of the same; hence faults are quite trivial to take place. Therefore to maintain health of WSN, in-built self evaluation and in-built self recovery, is necessary. In this article various fault recovery techniques are studied and analyzed, which can enlighten us for proposing a novel energy aware fault recovery scheme for homogeneous WSN in future; which further can be integrated with an existent fault tolerant framework already proposed by us. This study also enables to get a clearer picture on the current state of technology for fault recovery in WSN.