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This paper considers a heterogeneous network of energy constrained sensors deployed over a region. Each Normal sensor node in a network is systematically gathering and transmitting sensed data to the clusterhead, and then cluster head sending data to a base station (via intermediate cluster-heads). This paper focuses on reducing the energy consumption and hence improving lifetime of wireless sensor Networks. Clustering sensor node is an effective topology for the energy constrained networks. Sodoi:10.5121/ijwmn.2014.6503 fatcat:aofgwjlml5funj7xxrpwbxul3a