International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
Wireless Sensor Network (WSN) is a set of connected tiny devices (sensor nodes) with limited energy resource. WSNs have ability to extract the information from the harsh and hostile environment without human interaction. Once, WSN is deployed, it is impossible to recharge or replace the energy resource due to inaccessibility of nodes. So, network lifetime and fault tolerance are critical parameters. It's become very important to handle energy resource carefully as it plays vital role in prolonging the network lifetime.