Entracked energy efficient robust position tracking for mobile devices
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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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EnTracked: Energy-Efficient Robust Position Tracking forMobile Devices

MikkelBaunKjærgaard, JakobLangdal, TorbenGodsk, Thomas Toftkjær

MobiSys2009


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)


Power Model

  • Instantaneous model is not accurate,

    • Example, TOSSIM.

  • Concerning delay impact,

    • Request delay

    • Power-off delay


Power Model

  • Request delay

GPS

Radio


Power Model

  • Power-off delay


EnTracked

  • Position-base application


EnTracked

  • EnTracked client flow


Detecting Movement

  • Using accelerometer


Estimating Speed

  • Using GPS


Error Model


Experience

  • Emulation


Experience

  • Emulation


Experience

  • Real-world validation


Experience

  • Real-world validation


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