A MAC protocol with adaptive preloads considering low duty-cycle in WSNs

Authors:
JeongSeok On;JaeHyun Kim;Jaiyong Lee;Yeonsoo Kim;Hakjin Chong
Affiliations:
The Graduate School Yonsei University Electrical & Electronic Engineering, Seoul, Korea;The Graduate School Yonsei University Electrical & Electronic Engineering, Seoul, Korea;The Graduate School Yonsei University Electrical & Electronic Engineering, Seoul, Korea;USN Research Department, Future Technology Lab, KT;USN Research Department, Future Technology Lab, KT
Venue:
MSN'07 Proceedings of the 3rd international conference on Mobile ad-hoc and sensor networks
Year:
2007

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Abstract

Leading MAC protocols developed for duty-cycled WSNs such as BMAC employ a long preamble and channel sampling. The long preamble introduces excess latency at each hop and results in excess energy consumption at non-target receivers in ultra low-duty cycled WSNs. In this paper we propose AS-MAC (Asynchronous Sensor MAC), a low power MAC protocol for wireless sensor networks (WSNs). AS-MAC solves these problems by employing a series of preload approach that retains the advantages of low power listening and independent channel sampling schedule. The preload massage includes a destination address and a remaining time until data transmission. Moreover ASMAC offers an additional advantage such as flexible duty cycle as data rate varies. We demonstrate that AS-MAC is better performance than B-MAC through analysis and evaluation.