Sector Based Clustering Hierarchy (SBCH) protocol for clustered homogenous wireless sensor networks

Abstract

I study and analyze the LEACH protocol for extending the stability period for energy-constrained wireless sensor networks. Stability period refers to the time interval of the network before the death of the first node which is very vital in lots of applications of Wireless Sensor Network where there is need of reliable feedback from the network for a long time. In LEACH, the cluster-head are randomly selected among the sensor nodes by probabilistic rule in each round so that optimal number of cluster-heads and uniform distribution over the region cannot be guaranteed. My proposed protocol Sector Based Clustering Hierarchy (SBCH) Protocol improves the selection of cluster-heads by electing optimal number of cluster-heads in each round and distributing the cluster-heads uniformly over the region. SBCH divides the network field into the sectors of equal area i.e. static clusters that are equal to the optimal number of cluster-heads and then cluster-heads are selected from each sector which ensures the optimal number of cluster-heads are elected in each round and distribution of cluster-heads uniformly over the whole region of network field. In this way SBCH conserves the network energy much better than LEACH which results in better stability period. The simulation result suggests SBCH extend the stability period of the network more effectively than LEACH.