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System and method for using a satellite positioning system to filter WLAN access points in a hybrid positioning system

  • US 7,999,742 B2
  • Filed: 06/05/2009
  • Issued: 08/16/2011
  • Est. Priority Date: 06/06/2008
  • Status: Active Grant
First Claim
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1. A method of determining the location of a WLAN and satellite enabled device by using satellite measurements and satellite information to weigh WLAN access points (APs), the method comprising:

  • detecting WLAN APs in range of the WLAN and satellite enabled device;

    retrieving location estimates of the WLAN APs;

    obtaining satellite measurements and satellite information from at least two satellites to provide a plurality of possible satellite-based locations of the device; and

    providing a weight for each WLAN AP based on the distance from the WLAN APs to the nearest location among the plurality of possible satellite-based locations of the device.

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