A selected user equipment transmits a signature in a selected one of the common packet channel's time slots. The base station, in response to receiving the transmitted signature, selects a currently unused code, if available, out of a plurality of code associated with the access opportunity defined by...http://www.google.fr/patents/US6850514?utm_source=gb-gplus-shareBrevet US6850514 - Channel assignment in a spread spectrum CDMA communication system
Channel assignment in a spread spectrum CDMA communication system
