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Location watching

  • US 8,704,710 B2
  • Filed: 11/04/2011
  • Issued: 04/22/2014
  • Est. Priority Date: 11/04/2011
  • Status: Expired due to Fees
First Claim
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1. A method, comprising:

  • performing localization to determine a current location;

    obtaining a first cell reading, the first cell reading including cell tower identification information of a first plurality of cell towers;

    calculating a safe interval based on a distance from the current location to a destination target, the safe interval defining a sampling period for performing a next localization, the safe interval being calculated to be shorter in time than a time to travel from the current location to the destination target;

    obtaining a second cell reading after the safe interval has expired, the second cell reading including cell tower identification information of a second plurality of cell towers;

    determining a common cell tower based on the first and second cell readings;

    adjusting the safe interval in response to the determination of the common cell tower, the safe interval being adjusted based on a displacement distance from the current location; and

    performing localization after the adjusted safe interval has expired, the localization utilizing a global positioning system, cellular-based proximity location techniques, and/or wifi-based proximity location techniques.

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