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EnTracked : Energy-Efficient Robust Position Tracking for Mobile Devices

EnTracked : Energy-Efficient Robust Position Tracking for Mobile Devices. Mikkel Baun Kjærgaard , Jakob Langdal , Torben Godsk , Thomas Toftkjær MobiSys2009. Motivation. A system that, The estimation and prediction of system conditions and mobility

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EnTracked : Energy-Efficient Robust Position Tracking for Mobile Devices

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  1. EnTracked: Energy-Efficient Robust Position Tracking forMobile Devices MikkelBaunKjærgaard, JakobLangdal, TorbenGodsk, Thomas Toftkjær MobiSys2009

  2. Motivation • A system that, • The estimation and prediction of system conditions and mobility • Schedules position updates to both minimize energy consumption and optimize robustness. • Platform: Nokia N95, • Accelerometer • GPS • Radio (3G)

  3. Power Model • Instantaneous model is not accurate, • Example, TOSSIM. • Concerning delay impact, • Request delay • Power-off delay

  4. Power Model • Request delay GPS Radio

  5. Power Model • Power-off delay

  6. EnTracked • Position-base application

  7. EnTracked • EnTracked client flow

  8. Detecting Movement • Using accelerometer

  9. Estimating Speed • Using GPS

  10. Error Model

  11. Experience • Emulation

  12. Experience • Emulation

  13. Experience • Real-world validation

  14. Experience • Real-world validation

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