After determining a distressed mobile subscriber communication unit 100 is within a communication coverage area (60) of a base transceiver station (BTS) (22), a mobile BTS (55) positioned at a first location (201) uses a rotating directional antenna (46) to force mobile subscriber communication units...http://www.google.es/patents/US6141558?utm_source=gb-gplus-sharePatente US6141558 - Method and apparatus for locating a subscriber unit in a communication system
Method and apparatus for locating a subscriber unit in a communication system
