Wireless sensor networks are used for various applications. In this paper, the authors propose an energy efficient cluster based routing protocol along with prolonged network lifetime for WSN. In this they introduce a cluster heads, head set, for cluster based routing. Prolonged network lifetime, scalability and load balancing are important requirement for many sensor network applications. Clustering sensor nodes is an effective technique for achieving these goals. In this paper, they introduce an energy efficient clustering algorithm for sensor networks based on the LEACH (Low-Energy Adaptive Clustering Hierarchy) protocol.