Author： Chao Chih-Min Lee Yi-Wei
Publisher： Inderscience Publishers
ISSN： 1743-8225
Source： International Journal of Ad Hoc and Ubiquitous Computing, Vol.10, Iss.1, 2012-06, pp. : 12-21
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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.
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