Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Dual Wake-up Low Power Listening for Duty Cycled Wireless Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 738292 11 pages doi 2008 738292 Research Article Dual Wake-up Low Power Listening for Duty Cycled Wireless Sensor Networks Jongkeun Na 1 Sangsoon Lim 2 and Chong-Kwon Kim2 1 Computer Science Department University of Southern California Los Angeles CA 90089-0781 USA 2 School of Computer Science and Engineering Seoul National University Seoul 151-742 South Korea Correspondence should be addressed to Jongkeun Na jkna@ Received 19 February 2008 Revised 3 November 2008 Accepted 25 December 2008 Recommended by Bhaskar Krishnamachari Energy management is an interesting research area for wireless sensor networks. Relevant dutycycling or sleep scheduling algorithm has been actively studied at MAC routing and application levels. Low power listening LPL MAC is one of effective dutycycling techniques. This paper proposes a novel approach called dual wake-up LPL DW-LPL . Existing LPL scheme uses a preamble detection method for both broadcast and unicast thus suffers from severe overhearing problem at unicast transmission. DW-LPL uses a different wake-up method for unicast while using LPL-like method for broadcast DW-LPL introduces a receiver-initiated method in which a sender waits a signal from receiver to start unicast transmission which incurs some signaling overhead but supports flexible adaptive listening as well as overhearing removal effect. Through analysis and Mote Telosb experiment we show that DW-LPL provides more energy saving than LPL and our adaptive listening scheme is effective for energy conservation in practical network topologies and traffic patterns. Copyright 2008 Jongkeun Na et al. 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. 1. INTRODUCTION Energy conservation has
