An E-OTD method for locating a mobile station using measurement information related to arrival of signals transmitted from base stations of different operators for obtaining the base station locations. When one operator does not have enough base stations for providing measurement information for location...http://www.google.fr/patents/US6950663?utm_source=gb-gplus-shareBrevet US6950663 - Method of locating a mobile station based on observed time difference
Method of locating a mobile station based on observed time difference