Wireless sensor networks are the networks with wireless sensors disseminated in a region which sense various types of information and then transmit this information to the other nodes or to the final destination. These nodes sense the changes in the physical parameters similar to temperature, pressure, etc. The data sensed by these nodes are then approved to the Base Station (BS) for estimation. Wireless sensor networks are used for the variety of purposes like military surveillances, habitat monitoring, forest fire detections and landslide detections.