Energy-Efficient Rotation Technique of Cluster-Head Method for Wireless Sensor Networks

Sensor nodes are supposed to function independently for a long timespan through a restricted source of energy in Wireless sensor networks (WSNs). For prolonging the network lifespan, sensor nodes need to be energy-efficient. To split the sensing region of WSNs into clusters is a noble methodology is to lengthen network lifespan. Clustering methods rotate the extra burden of head of cluster nodes among other nodes of the network through head rotation and re-clustering techniques. Overhead cost is greater in case of Re-clustering as compared to rotation method due to its global approach. Head rotation takes place when residual energy of cluster head falls below a fixed energy threshold. However, this fixed threshold does not consider the existing load of cluster head which become foremost cause for enhancing their early death. This chapter proposes an Energy-Efficient Rotation Technique of Cluster Head (EERTCH) for WSNs, which takes existing load of cluster head in consideration for their rotation.