SUBSCRIBER UNIT OF WIRELESS DIGITAL CODE DIVISION MULTIPLE ACCESS (CDMA) COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a wireless digital CDMA communication system which supports all types of voice and data communications while utilizing the minimum frequency bandwidth for each application.SOLUTION: A wireless digital CDMA communication system of the present invention efficiently allocates ISDN bandwidth in quick response to the requirement from subscribers. When a subscriber station unit activates, the system sets a channel, and generates a spread spectrum code necessary for supporting the maximum capacity channel requested by the subscriber station unit. The system will not reserve a part of the communication bandwidth until actually receiving request from the subscriber unit. Since a call setup such as allocation of spread spectrum code is made at the onset of a call from the subscriber station unit, the subscriber station unit immediately can access to a part of the frequency spectrum necessary for supporting a required specific application.