IEDB-CHS-BOF: Improved Energy and Distance Based CH Selection with Balanced Objective Function for Wireless Sensor Networks

In this paper, we propose an Improved Energy and Distance Based Cluster Head Selection with Balanced Objective Function (IEDB-CHS-BOF) protocol for wireless sensor networks that addresses the main drawback of the EDB-CHS-BOF protocol. The primary objective of the IEDB-CHS-BOF protocol is to reduce the amount of re-clustering and accelerate the clustering process. To achieve this objective, the IEDB-CHS-BOF protocol affirms that cluster heads do not have to overturn each round but more preferably each batch of rounds. Strictly speaking, sensor nodes stay serving as cluster heads as long as their remaining energy levels are higher than a predefined threshold energy. The proposed protocol not only diminishes the control overhead that is needed for setting up the clusters, but also is helpful to extend the lifetime of the entire network. MATLAB simulation results show superior performance of the IEDB-CHS-BOF protocol over existing protocols in terms of the network lifetime.