Abstract: The Wireless Sensor Network(WSN) is a network consist of many number of distributed sensor nodes. They are the main entity to be consider. WSN is used to provide many real world solution to certain problems. There are many applications in various fields like home, medical, military, etc. Sensor nodes sense the events for particular area and pass the information to base station from where human can get the data. Sensor nodes of WSN have limited capabilities in terms of battery life as well as data storage. In designing wireless sensor network the main issue is energy dissipation.