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Position determining system using transmitted position information
   
Document Number
US Patent 6968737
Issued Date
November 29, 2005
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Abstract
The present invention is a system and method for automated position location using RF signposting. The present invention comprises a plurality of transmitting units placed throughout a service area. Each transmitting unit repeatedly transmits a signal including position information related to a position associated with the transmitting unit. The position information may be an absolute position or an encoded position based on the structure of a building in which the transmitting unit is located. A receiving unit receives the signal transmitted from a transmitting unit and determines the position of the receiving unit, based on the received indication. The transmitting units are placed to provide uniform coverage of the service area, thus providing position location indoors and in urban areas where GPS does not function properly.
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Number of Claims:
38
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Owner
Lucent Technologies Inc. (Murray Hill, NJ)
Published
November 29, 2005
Application Number
08/778,124
Filed
January 2, 1997
US Classification
73/178R  
Int'l Classification
Examiner
USPTO Field of Search
342/357   342/457   342/463   342/418   342/417   342/352   364/449   73/178R   379/58   379/59   379/60   455/33.4   455/33.1   455/56.1   455/73   455/12.1   455/13.1   455/13.2   455/13.4   455/341   455/541   455/63   455/316   455/456   340/539   340/988   340/991   340/993  
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