Wireless Sensor Network (WSN) is a collection of nodes which are deployed in an environment where the data is needed to be sensed to monitor any changes in surrounding. Each node is equipped with memory, battery, transceivers. The nodes are placed in such an environment where monitoring by human is difficult to schedule or managed efficiently by individual. Each node is responsible for manipulating the data it has sensed and transferring it to the Base Station (BS). These nodes are grouped into clusters so that the drainage of battery in wireless sensor network can be overcome and increase the scalability.