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Functionality-power-packaging considerations in context aware wearable systems

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Abstract

Wearable computing places tighter constraints on architecture design than traditional mobile computing. The architecture is described in terms of miniaturization, power-awareness, global low-power design and suitability for an application. In this article we present a new methodology based on three different system properties. Functionality, power and electronic Packaging metrics are proposed and evaluated to study different trade offs. We analyze the trade offs in different context recognition scenarios. The proof of concept case study is analyzed by studying (a) interaction with household appliances by a wrist worn device (acceleration, light sensors) (b) studying walking behavior with acceleration sensors, (c) computational task and (d) gesture recognition in a wood-workshop using the combination of accelerometer and microphone sensors. After analyzing the case study, we highlight the size aspect by electronic packaging for a given functionality and present the miniaturization trends for ‘autonomous sensor button’.

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Acknowledgments

The authors would like to thank Prof. Henry Baltes and Sadik Hafizovic from the ‘Physical Electronics Lab’, ETH Zürich, Prof. Christofer Hierold from the ‘Institute of Micro and Nano Systems’, ETH Zürich for sharing their views on miniaturization trends and David Barras from the ‘Institute of Electronics’, ETH Zürich for his suggestions on RF devices. Our special thanks to Mr. Jürgen M Wolf from Franunhofer IZM, Germany for providing reprint permission for the ITRS roadmap picture.

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Authors and Affiliations

  1. Wearable Computing Lab, ETH Zürich, Switzerland

    Nagendra Bhargava Bharatula & Gerhard Tröster

  2. Department of Mathematics and Informatics, University of Passau, Passau, Germany

    Paul Lukowicz

Authors
  1. Nagendra Bhargava Bharatula
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  2. Paul Lukowicz
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  3. Gerhard Tröster
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Correspondence to Nagendra Bhargava Bharatula.

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Bharatula, N.B., Lukowicz, P. & Tröster, G. Functionality-power-packaging considerations in context aware wearable systems. Pers Ubiquit Comput 12, 123–141 (2008). https://doi.org/10.1007/s00779-006-0106-3

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