CBUC: A Connectivity Based Unequal Clustering Protocol for Scalable Wireless Sensor Networks

Abstract

The clustering technique is used to increase the lifetime of the network. The existing unequal clustering uses the two techniques: the selection of the head with more residual energy and multi-hop routing. In this algorithm, the cluster members are not fixed in the cluster, when the cluster member send their data to the cluster head, a large amount of energy is spent during the data aggregation. When the cluster head sends data to the base station, the cluster head near the base station dies early due to heavy traffic which decreases the network lifetime. This paper proposed a new unequal clustering named as CBUC. In this work, the head selection is based on residual energy by fixing the degree of connectivity up to some threshold value in each cluster which reduces the intra traffic in every cluster and due to this energy consumption is low during data aggregation and low traffic burden on cluster head nearer to the base station. Results show that the average residual energy of the node is greater than the existing one and the number of dead nodes is less and as a result network lifetime will be increased.