Lifetime optimization in hierarchical wireless sensor networks

Authors:
Samy S. Botros;Hany M. ElSayed;Hassanein H. Amer;M. S. El-Soudani
Affiliations:
Electronics and Communications Eng. Department, Cairo University, Giza, Egypt;Electronics and Communications Eng. Department, Cairo University, Giza, Egypt;Electronics Eng. Department, American University in Cairo, Cairo, Egypt;Electronics and Communications Eng. Department, Cairo University, Giza, Egypt
Venue:
ETFA'09 Proceedings of the 14th IEEE international conference on Emerging technologies & factory automation
Year:
2009

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Abstract

Wireless sensor networks is a voracious field for research, especially after the great advances in MEMS based sensors. In this paper, environmental monitoring applications are considered where data may be continuously reported with the possibility of urgent alarming if necessary. Hierarchical architecture of the network is assumed in order to overcome the problem of energy constrained sensors. Two algorithms are proposed with the purpose of network lifetime elongation and the maximization of the use of the available energy. The first algorithm is a modification for LEACH-C to enhance its performance. It results in a 25% longer lifetime. The second algorithm is an energy efficient method to ensure full coverage of the network as long as sensors are still working. This achieves 32% longer lifetime than LEACH-C.