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GPS power conservation using environmental data

  • US 9,198,604 B2
  • Filed: 04/29/2015
  • Issued: 12/01/2015
  • Est. Priority Date: 06/22/2012
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a biometric monitoring device to be worn on a person'"'"'s wrist, the biometric monitoring device including;

    a controller including at least one processor and a memory;

    a global positioning system (GPS) receiver; and

    at least one non-GPS sensor, the at least one non-GPS sensor includes one or more sensors selected from the group consisting of;

    a single-axis accelerometer, a multi-axis accelerometer, a gyroscope, and a magnetometer, wherein;

    the at least one processor, the memory, the GPS receiver, and the at least one non-GPS sensor are communicatively connected, andthe memory stores computer-executable instructions for controlling the at least one processor to;

    a) receive motion data from the at least one non-GPS sensor,b) determine whether the biometric monitoring device is substantially motionless or in motion based at least in part on the motion data, andc) set a frequency with which the GPS receiver obtains positional fixes at a first level responsive, at least in part, to a determination by the at least one processor that the motion data indicates that the biometric monitoring device is in motion, andd) set the frequency with which the GPS receiver obtains positional fixes at a second level lower than the first level responsive, at least in part, to a determination by the at least one processor that the motion data indicates that the biometric monitoring device is substantially motionless, wherein the second level supports the GPS receiver performing a warm start and does not support a hot start.

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