Estimation of Optimum Number of Clusters in WSN

Abstract

Grouping of sensor nodes in clusters has several advantages including energy efficiency, network scalability, and efficient data aggregation. Many clustering protocols have been developed till date promising better energy efficiency in comparison with others. In this paper, we have surveyed important clustering techniques with a focus on the estimation of optimum number of clusters. We have also presented a case study on LEACH protocol, suggesting that under certain conditions clustering is not a wise solution, a non-clustered network or a network with mixed approach can give better result. Experimental results show significant improvement in lifetime and throughput.