Abstract:Wireless sensor networks is a system of multiple small sensors limited energy sources, used to sense any given sensing region of interest. In WSN, sensors might be required to work for a longer duration of time from the time of its deployment. Hence to optimize the utilization of energy at each node, we propose an algorithm, which can eventually enhance the lifetime and hence the reliability of the sensor nodes and the overall network. Here PSO based efficient clustering is performed and the appropriate selection of CH and SCH is done. The proposed approach outperforms the tradition F-LEAH algorithm. The result obtained through simulation shows that the proposed algorithm performs better than F-LEACH approach in terms of stability, reduced energy consumption at each node, less delay and drop at the BS and enhanced the lifetime of the network.