Patent ID: 8483706
Filing Date: 2013-07-09
Classification: G01S,H04W

Abstract:
1. A method comprising: accessing positioning information stored in a database, the positioning information associated with wireless signaling measurements and observed timing differences (OTDs) of received signals collected from a plurality of mobile terminals and a plurality of base stations; and determining location information for a target mobile terminal based, at least in part, on said positioning information and signaling information associated with said target mobile terminal, wherein determining the location information for the target mobile terminal includes determining the location information for the target mobile terminal based on an observed time difference of arrival (OTDOA) for the target mobile terminal and on at least one estimated real time difference (RTD) determined based, at least in part, on said OTDs collected from the plurality of mobile terminals and the plurality of base stations; wherein at least some of the wireless signaling measurements collected from the plurality of mobile terminals and the plurality of base stations, including wireless signaling measurements for performing signal pattern matching, are associated with respective locations of the plurality of mobile terminals and the plurality of base stations determined, at least in part, based on the OTDs and on the at least one estimated RTD.