A backoff-based energy efficient clustering algorithm for wireless sensor networks

Authors:
Yongtao Cao;Chen He;Jun Wang
Affiliations:
Department of Electronics Engineering, Shanghai Jiao Tong University, China;Department of Electronics Engineering, Shanghai Jiao Tong University, China;Department of Communication Engineering, Nanjing University of Posts and Telecommunications, China
Venue:
MSN'05 Proceedings of the First international conference on Mobile Ad-hoc and Sensor Networks
Year:
2005

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Abstract

Wireless sensor networks have emerged recently as an effective way of monitoring remote or inhospitable physical environments. One of the major challenges in devising such networks is how to organize a large amount of sensor nodes without the coordination of any centralized access point. Clustering can not only conserve limited system resource, but also serve as an effective self-organization tool. In this paper, we present a distributed clustering algorithm based on adaptive backoff strategy. By adaptively adjusting the wakeup rate of the exponential distribution, a node with higher residual energy is more likely to be elected clusterhead. We also take advantage of the contention-based channel access method to ensure that clusterheads are well scattered. Simulation experiments illustrate that our algorithm is able to significantly prolong network life compared with the conventional approach.