On receiving a link channel assignment request or a link channel reassignment request from a mobile station, a wireless base station specifies a unique word (UW) that is not assigned to any other mobile stations, and sends a channel assignment notification containing the specified UW to the requesting...http://www.google.fr/patents/US6889047?utm_source=gb-gplus-shareBrevet US6889047 - Wireless base station and a wireless phone
