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Transmitter position integrity checking

  • US 9,042,913 B2
  • Filed: 09/04/2014
  • Issued: 05/26/2015
  • Est. Priority Date: 09/15/2009
  • Status: Active Grant
First Claim
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1. A server-based method of determining uncertainty, comprising:

  • receiving a reported position associated with a wireless transmitter;

    estimating, by the server, a position of a mobile station at a first point in time;

    calculating a range between the reported position associated with the wireless transmitter and the estimated position of the mobile station;

    determining, by the server, a position uncertainty value for the reported position associated with the wireless transmitter, the position uncertainty value representative of a level of correlation between one or more measurements, related to one or more signals transmitted from the wireless transmitter, and the calculated range between the reported position associated with the wireless transmitter and the estimated position of the mobile station; and

    sending said position uncertainty value to a base station almanac database server.

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