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Portable biometric monitoring devices having location sensors

  • US 9,035,825 B2
  • Filed: 04/29/2014
  • Issued: 05/19/2015
  • Est. Priority Date: 04/01/2013
  • Status: Active Grant
First Claim
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1. A method of determining a global position of a worn biometric monitoring device, the method comprising:

  • (a) repeatedly and automatically syncing the worn biometric monitoring device with a secondary device associated with the worn biometric monitoring device, wherein the syncing comprises providing the worn biometric monitoring device with current ephemeris data from the secondary device using a wireless short-range, low-power communication protocol and each syncing comprises;

    (i) determining an elapsed time from when the ephemeris data was last updated,(ii) comparing the elapsed time with a sync time threshold,(iii) determining that the elapsed time exceeds the sync time threshold, and(iv) obtaining updated ephemeris data from the secondary device.

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