Title: Load-aware energy-efficient medium access control for Wireless Sensor Networks

Authors: Chih-Min Chao; Yi-Wei Lee

Addresses: Department of Computer Science and Engineering, National Taiwan Ocean University, 2, Pei-Ning Road, Keelung 20224, Taiwan ' Department of Computer Science and Engineering, National Taiwan Ocean University, 2, Pei-Ning Road, Keelung 20224, Taiwan

Abstract: In Wireless Sensor Networks (WSNs), sensors are usually battery-powered. Therefore, it is essential to reduce energy consumption to prolong network lifetime. In this paper, we propose a Load-aware Energy-efficient MAC protocol (LE-MAC) which utilises fuzzy control and the quorum concept. The LE-MAC protocol utilises fuzzy control to dynamically adjust the active/sleep ratio of each sensor node. The quorum concept is adopted to guarantee that two nodes with different active/sleep ratios can meet and communicate with each other. Simulation results verify that our LE-MAC can adapt to various network traffic loads. Furthermore, LE-MAC achieves significant performance improvements in energy consumption, transmission successful ratio, and transmission delay.

Keywords: WSNs; wireless sensor networks; fuzzy control; energy efficiency; MAC protocol; medium access control; quorum systems; load awareness; simulation; energy consumption; transmission success ratio; transmission delay.

DOI: 10.1504/IJAHUC.2012.047256

International Journal of Ad Hoc and Ubiquitous Computing, 2012 Vol.10 No.1, pp.12 - 21

Received: 06 Apr 2010
Accepted: 05 Oct 2010
Published online: 15 Jun 2012 *

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