Remote Boot Trigger for Android Devcies using Microwave Power Transfer and

Abstract
- 野外で長期のスマホセンシングを行うには間欠駆動が不可欠である。しかし、タイマ回路の待機電力により電池寿命が縮むという問題があった。本研究では、USB端子に所定の電圧を印加するとスマホが起動することに着目し、マイクロ波給電技術を用いてスマホを遠隔起動する手法を提案する。また、Android OSに変えてLinuxカーネルでセンシングを行うことで、電力オーバーヘッドを大幅に削減する手法も併せて提案する。
- Intermittent operation is necessary for smartphone sensing in outdoor environments. However, the timer circuit consumes variable energy in the battery and shorten the battery life. In this research, we propose a remote boot trigger for Android Smartphones using microwave power transfer whose receiver consists of passive circuit only. This system exploits the feature of Android smartphones to boot up automatically when connected to a charger. We also propose a low-power sensing method exploiting the Linux kernel instead of the Android OS to drastically reduce the power overhead.

Work done by
- 高木雅、池内尚史、角谷和宣、川原圭博 (Masaru Takagi, Takashi Ikeuchi, Kazunobu Sumiya, Yoshihiro Kawahara)
Publications
- M. Takagi, T. Ikeuchi, K. Sumiya, Y. Kawahara, ``External Power Management System for Smartphones Applying Microwave Power Supply, ’’ Vol.59, No.10, pp.1802-1813 (2018.10) , ISSN 1882-7764, Oct. 2018 (In Japanese).
- M. Takagi, ○T. Ikeuchi, and Y. Kawahara, ``WakeDroid: a Remote Boot Trigger for Android Devices as IoT Nodes, '' Proc. of IEEE ICC 2018 (Workshop on Energy Harvesting Wireless Communications), W04-S1 EHWC, Kansas City, MO, USA, May 2018.

○ is denoted as those who presented the work at conference as an representative.

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