Date Added: Jul 2014
Wireless Sensor Networks (WSNs) are collection of huge number of sensor nodes that sense the environmental and physical conditions such as temperature, pressure, humidity, sound etc. and send it to the sink. Sensor nodes in the wireless sensor network have limited storage, processing, transmitted capabilities as well as limited energy sources. Sensor nodes have limited energy and resource constraints so efficient utilization of energy is essential for extending sensor network longevity. Clustering is an effective technique in prolonging the lifetime of the WSN.