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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국정보처리학회 JIPS(Journal of Information Processing Systems) JIPS(Journal of Information Processing Systems) 제15권 제3호
발행연도
2019.1
수록면
593 - 603 (11page)

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In wearable healthcare systems, sensor devices can be deployed in places around the human body such as thestomach, back, arms, and legs. The sensors use tiny batteries, which have limited resources, and old sensorbatteries must be replaced with new batteries. It is difficult to deploy sensor devices directly into the humanbody. Therefore, instead of replacing sensor batteries, increasing the lifetime of sensor devices is more efficient. A transmission power control (TPC) algorithm is a representative technique to increase the lifetime of sensordevices. Sensor devices using a TPC algorithm control their transmission power level (TPL) to reduce batteryenergy consumption. The TPC algorithm operates on a closed-loop mechanism that consists of two parts, suchas sensor and sink devices. Most previous research considered only the sink part of devices in the closed-loop. If we consider both the sensor and sink parts of a closed-loop mechanism, sensor devices reduce energyconsumption more than previous systems that only consider the sensor part. In this paper, we propose a newapproach to consider both the sensor and sink as part of a closed-loop mechanism for efficient energymanagement of sensor devices. Our proposed approach judges the current channel condition based on thevalues of various body sensors. If the current channel is not optimal, sensor devices maintain their current TPLwithout communication to save the sensor’s batteries. Otherwise, they find an optimal TPL. To compareperformance with other TPC algorithms, we implemented a TPC algorithm and embedded it into sensordevices. Our experimental results show that our new algorithm is better than other TPC algorithms, such aslinear, binary, hybrid, and ATPC.

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