Performance enhancement of low power listening MAC for duty cycled wireless sensor networks

Authors:
Sangsoon Lim;Jiwoong Jeong;Jongkeun Na;Chong-Kwon Kim
Affiliations:
School of Computer Science and Engineering, Seoul National University, Korea;School of Computer Science and Engineering, Seoul National University, Korea;Department of Computer Science, University of Southern California;School of Computer Science and Engineering, Seoul National University, Korea
Venue:
ICOIN'09 Proceedings of the 23rd international conference on Information Networking
Year:
2009

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Abstract

Recently low power listening (LPL) MAC protocols based on duty-cycling mechanism have been studied extensively to achieve ultra low energy consumption in wireless sensor networks (WSNs). However, state-of-the-art LPL scheme still suffers from some performance degradation due to its own protocol incompleteness. In this paper, we propose the τ-duration CCA method to mitigate the collision probability in ACK-based LPL MAC protocol and show its performance improvement via analytical and experimental results. Our performance study indicates that ACK-based LPL MAC protocol which adopts the τ-duration CCA is significantly better than normal ACK-based LPL MAC protocol in terms of energy consumption.