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GPS power conservation using environmental data

  • US 9,572,533 B2
  • Filed: 11/12/2015
  • Issued: 02/21/2017
  • Est. Priority Date: 06/22/2012
  • Status: Active Grant
First Claim
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1. A biometric monitoring device to be worn on a person, the biometric monitoring device comprising:

  • a global positioning system (GPS) receiver;

    a set of one or more non-GPS sensors to generate motion data for the person including motion data indicative that the person is walking, running, or jogging; and

    a controller, communicatively coupled to the GPS receiver and the set of non-GPS sensors, including at least one processor and a non-transitory computer readable medium, the controller having computer-executable instructions stored on the non-transitory computer readable medium which, when executed, cause the at least one processor to;

    determine a step count from the motion data generated by the set of non-GPS sensors, wherein the step count comprises the number of steps taken by the person, andset a frequency with which the GPS receiver obtains positional fixes, wherein the frequency of obtaining positional fixes comprises a time interval between which the GPS receiver obtains positional fixes of the biometric monitoring device, the controller being to set the frequency at one of a plurality of levels,wherein the level at which the frequency is set is based on;

    the step count within a window of time, orthe motion data used to derive the step count within the window of time, wherein the plurality of levels includes a first level and a second level, and wherein the second level has a lower frequency with which the GPS receiver obtains the positional fixes than the first level, the second level indicating a greater time interval between positional fixes than the first level.

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