Optimal Placement of Single Cluster Head in Wireless Sensor Networks via Clustering

In order to minimize the energy consumption in wireless sensor network, this paper presents a model to reduce the consumed energy and prolong the lifetime of the network by reducing the number of active sensor nodes, and selecting the optimal location for the single cluster head (CH). To increase the energy efficiency of the transmit-only nodes, we propose using k-means algorithm to perform node clustering and determine one sensor node from each cluster to represent this cluster. We use particle swarm optimization (PSO) to solve the non-convex optimization problem of finding optimal location of the CH. Simulation results show that the proposed approach achieves better network lifetime and data delivery at the BS compared to its comparators.