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System and method for locating mobile device in wireless communication network

  • US 8,160,610 B2
  • Filed: 03/18/2009
  • Issued: 04/17/2012
  • Est. Priority Date: 03/18/2009
  • Status: Active Grant
First Claim
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1. A method of determining a location of a mobile device in a wireless network, the method comprising:

  • receiving a plurality of global navigation satellite system (GNSS) measurements for the mobile device;

    receiving a plurality of terrestrial measurements from a corresponding plurality of transceivers in the wireless network, each terrestrial measurement indicating a distance between the corresponding transceiver and the mobile device;

    determining a first dilution of precision (DOP) measure corresponding to the received GNSS measurements;

    determining combined DOP measures corresponding to each terrestrial measurement combined with the GNSS measurements;

    selecting at least one terrestrial measurement resulting in a corresponding combined DOP measure that is improved over the first DOP measure; and

    determining the location of the mobile device as a function of the GNSS measurements and the selected at least one terrestrial measurement.

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