Energy Efficient Routing in Wireless Sensor Network

In wireless sensor networks, nodes are deployed in an area called sensor field. Sensor nodes are resource limited devices. Sensor nodes have limited battery power. Battery determines the lifetime of the network. Therefore, energy is very crucial parameter for wireless sensor network. Existing research is motivated by LEACH (Low Energy Adaptive Clustering Hierarchy) protocol. We have presented several methods from literature for making routing energy efficient in wireless sensor networks. In existing methods, cluster heads are randomly selected. For selection of cluster head, energy is not considered. Cluster head is replaced for every round. Our proposed method is based on optimum number of cluster head, dynamic cluster size, multi hop approach and cluster headreplacement cost. Simulation result shows that network lifetime is increased using our proposed method.