Table of Contents
ISRN Sensor Networks
Volume 2013 (2013), Article ID 314732, 14 pages
http://dx.doi.org/10.1155/2013/314732
Research Article

Balancing Energy Consumption in Clustered Wireless Sensor Networks

1Inria Lille-Nord Europe, 59650 Villeneuve d’Ascq, France
2Université Lille 1, 59655 Villeneuve d’Ascq Cedex, France

Received 29 August 2013; Accepted 17 September 2013

Academic Editors: M. Ekström and B. Tavli

Copyright © 2013 Tony Ducrocq 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

Clustering in wireless sensor networks is an efficient way to structure and organize the network. It aims at identifying a subset of nodes within the network and binding it to a leader (i.e., cluster head). The leader becomes in charge of specific additional tasks like gathering data from all nodes in its cluster and sending them using a longer range communication to a sink. As a consequence, a cluster head exhausts its battery more quickly than regular nodes. In this paper, we present four variants of BLAC, a novel battery level aware clustering family of schemes. BLAC considers the battery level combined with another metric to elect the cluster-head. The cluster-head role is taken alternately by each node to balance energy consumption. Due to the local nature of the algorithms, keeping the network stable is easier. BLAC aims at maximizing the time with all nodes alive to satisfy the application requirements. Simulation results show that BLAC improves the full network lifetime three times more than the traditional clustering schemes by balancing energy consumption over nodes and still deliveres high data ratio.