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Location determination and location tracking in wireless networks

  • US 20050246334A1
  • Filed: 04/30/2004
  • Published: 11/03/2005
  • Est. Priority Date: 04/30/2004
  • Status: Active Grant
First Claim
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1. A system comprising:

  • one or more wireless network access nodes, said one or more wireless network access nodes providing a plurality of antenna patterns;

    calculation logic for determining receive signal strength differences with respect to a signal as received by said one or more wireless access nodes using said plurality of antenna patterns, said signal being transmitted from a location unknown to said system;

    a radio map providing location estimates associated with use of said plurality of antenna patterns; and

    calculation logic for improving said location estimates of said radio map using said receive signal strength differences determined by said calculation logic for determining receive signal strength differences.

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