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The Scientific World Journal
Volume 2014, Article ID 473132, 6 pages
http://dx.doi.org/10.1155/2014/473132
Research Article

Adaptive Low-Power Listening MAC Protocol Based on Transmission Rates

1Department of Embedded Systems Engineering, Incheon National University, Incheon 402-772, Republic of Korea
2Department of Computer Science & Engineering, Gangneung-Wonju National University, Gangwon-do 220-711, Republic of Korea

Received 4 August 2014; Accepted 15 August 2014; Published 28 August 2014

Academic Editor: Jason C. Hung

Copyright © 2014 Kwang-il Hwang and Gangman Yi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Even though existing low-power listening (LPL) protocols have enabled ultra-low-power operation in wireless sensor networks (WSN), they do not address trade-off between energy and delay, since they focused only on energy aspect. However, in recent years, a growing interest in various WSN applications is requiring new design factors, such as minimum delay and higher reliability, as well as energy efficiency. Therefore, in this paper we propose a novel sensor multiple access control (MAC) protocol, transmission rate based adaptive low-power listening MAC protocol (TRA-MAC), which is a kind of preamble-based LPL but is capable of controlling preamble sensing cycle adaptively to transmission rates. Through experiments, it is demonstrated that TRA-MAC enables LPL cycle (LC) and preamble transmission length to adapt dynamically to varying transmission rates, compensating trade-off between energy and response time.