Date Added: May 2012
A sensor network is composed of a large number of sensor nodes, which are densely deployed either inside the phenomenon or very close to it. Sensor nodes have sensing, processing and transmitting capability. The authors however have limited energy and measures need to be taken to make optimum usage of their energy and save them from task of only receiving and transmitting data without processing. Various techniques for energy utilization optimisation have been proposed Major players are however clustering and relay node placement.