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International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 274576, 11 pages
http://dx.doi.org/10.1155/2012/274576
Research Article

An Efficient Clustering Algorithm in Wireless Sensor Networks Using Cooperative Communication

1School of Computer Science and Technology, Soochow University, Suzhou 215006, China
2State Key Lab. for Novel Software Technology, Nanjing University, Nanjin 210093, China

Received 7 January 2012; Accepted 27 February 2012

Academic Editor: Hongli Xu

Copyright © 2012 Shukui Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Processing the gathered information efficiently is a key functionality for wireless sensor networks. In generally, the sensor networks often use in-network data aggregation and clustering to optimize network communication. The set of aggregating nodes forms a dominating set of the network graph. Finding the weakly connected dominating set (WCDS) is a promising approach for clustering the WSN. However, finding a minimum WCDS is NP-hard problem for most graphs, and a host of approximation algorithm has been proposed. The aim of the paper is to construct a minimum WCDS as a clustering scheme for WSN. Our clustering schemes construction algorithm includes two phases. First of all, we construct a maximal data aggregation tree (DAT) of the network. The second phase of the algorithm is to choose the nodes (called connectors) to make the WCDS connected. The correctness and performance of our algorithms are confirmed through theoretical analysis and comprehensive simulations.