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Enhancing lifetime of wireless sensor networks using multiple data sinks

Azad, Amar Prakash and Chockalingam, A (2011) Enhancing lifetime of wireless sensor networks using multiple data sinks. In: International Journal of Sensor Networks, 9 (3-4, S). pp. 139-157.

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In this paper, we address the fundamental question concerning the limits on the network lifetime in sensor networks when multiple base stations (BSs) are deployed as data sinks. Specifically, we derive upper bounds on the network lifetime when multiple BSs arc employed, and obtain optimum locations of the base stations that maximise these lifetime bounds. For the case of two BSs, we jointly optimise the BS locations by maximising the lifetime bound using genetic algorithm. Joint optimisation for more number of BSs becomes prohibitively complex. Further, we propose a suboptimal approach for higher number of BSs, Individually Optimum method, where we optimise the next BS location using optimum location of previous BSs. Individually Optimum method has advantage of being attractive for solving the problem with more number of BSs at the cost of little compromised accuracy. We show that accuracy degradation is quite small for the case of three BSs.

Item Type: Journal Article
Publication: International Journal of Sensor Networks
Publisher: Inderscience Publishers
Additional Information: Copyright of this article belongs to Inderscience Publishers.
Keywords: wireless sensor networks;WSNs;WSN lifetime;network lifetime;multiple base stations;optimum base station locations;energy efficiency;wireless networks;multiple data sinks
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 18 Jul 2011 07:47
Last Modified: 18 Jul 2011 07:47
URI: http://eprints.iisc.ac.in/id/eprint/39202

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