No abstract

Wireless Sensor Network (WSN) consists of many small sensor nodes. A sensor node is a battery operated small device capable of computation and communication. These nodes are capable of sensing events within their coverage area. The main objective of WSN is to sense destructive events from its environment and send that information to the sink node, so that it can take the corrective actions. As the sensor nodes are deployed in remote location, it is very difficult to recharge the batteries. Thus energy efficiency is the main challenge in WSN. The paper gives a brief study about different energy efficient routing protocols, so that the problem areas can be identified and solved.