Dual priority scheduling based on power adjust context switching for wireless sensor network

Authors:
Taeo Hwang;Jung-Guk Kim;Kwang-Ho Won;Seong-Dong Kim;Dong-Sun Kim
Affiliations:
Ubiquitous Computing Center, Korea Electronics Technology Institute, Seongnam-si, Gyeonggi-do Korea;Hankuk Univ. of Foreign Studies, Korea;Ubiquitous Computing Center, Korea Electronics Technology Institute, Seongnam-si, Gyeonggi-do Korea;Ubiquitous Computing Center, Korea Electronics Technology Institute, Seongnam-si, Gyeonggi-do Korea;DxB.Communication Convergence Research Center, Korea Electronics Technology Institute, Seongnam-si, Gyeonggi-do, Korea
Venue:
ICUCT'06 Proceedings of the 1st international conference on Ubiquitous convergence technology
Year:
2006

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Abstract

The wireless sensor network (WSN) node is required to operate for several months with the limited system resource such as memory and power. A general WSN node operates in the active state during less than 1% of the several-month lifetime and waits an event in the inactive state during 99% of the same lifetime. This paper suggests a power adjust dual priority scheduler (PA-DPS) for low-power, which has a structure to meet the requirements for the WSN by estimating power consumption in the WSN node. PA-DPS has been designed based on an event-driven approach and is based on the dual-priority scheduling structure, which has been conventionally suggested in the real-time system field. From experimental results, PA-DPS reduced the inactive mode current up to 40% under the 1% duty cycle.