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Motion direction determination and application

  • US 10,281,484 B2
  • Filed: 05/02/2014
  • Issued: 05/07/2019
  • Est. Priority Date: 05/02/2014
  • Status: Active Grant
First Claim
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1. A method comprising:

  • obtaining, by one or more processors acceleration data for a mobile device in each of one or more directions, wherein obtaining the acceleration data involves receiving the acceleration data from one or more sensors of the mobile device;

    identifying, via the one or more processors, a use case for the mobile device based at least in part on the acceleration data, the use case corresponding with at least one of a manner in which the mobile device is being carried or a manner in which a pedestrian carrying the mobile device is moving; and

    selecting, via the one or more processors, a set of one or more parameters based on the identified use case, wherein the set of parameters includes a phase offset between vertical and horizontal components of the acceleration data and wherein a phase offset of a first use case is different from a phase offset of a second use case;

    calculating, via the one or more processors, an estimated motion direction of the mobile device relative to a coordinate system based on the acceleration data and the respective set of parameters corresponding to the identified use case;

    determining a reliability metric for the estimated motion direction; and

    controlling a network interface of the mobile device according to whether the reliability metric is above a threshold value, the network interface being configured to communicate with a Global Positioning System, Satellite Navigation System, or other positioning or navigation system, wherein the controlling involves turning off the network interface if the reliability metric is above the threshold value.

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