Patent ID: 8145234
Filing Date: 2012-03-27
Classification: G01S,H04W

Abstract:
1. A method for providing Assisted Global Positioning System (A-GPS) assistance data to wireless telecommunication system user equipment (UE), comprising: receiving a request for A-GPS assistance data for a UE located on a roaming network, the request identifying a network location in which the UE is operating, the network location including a cell ID, a Location Area Code (LAC), a Mobile Country Code (MCC), and a Mobile Network Code (MNC); determining that a cell identification (cell ID) database, the cell ID database relating a plurality of network locations to a plurality of corresponding geographic locations, does not include the cell ID identified in the request for A-GPS assistance data; determining that the cell ID database does not include a similar cell ID to the cell ID identified in the request for A-GPS assistance data, the similar cell ID differing from the cell ID by a single digit; estimating a corresponding geographic location in response to the request for A-GPS assistance data, the estimating including: identifying assistance data associated with the corresponding geographic location for transmittal to the UE; receiving a geographic location reported by the UE in response to the assistance data transmitted to the UE; and updating the cell ID database to relate the cell ID in the request for A-GPS assistance data to the geographic location reported by the UE.