Patent ID: 7715348

Claim:
A radio control device for controlling a plurality of base stations, comprising: a channel assignment request reception unit configured to receive a channel assignment request; a first channelization code selection unit configured to select a first channelization code for a mobile station for a first frequency, based on a scrambling code of the first frequency; a second channelization code selection unit configured to select a second channelization code for the mobile station for a second frequency, based on a scrambling code of the second frequency; an assignment unit configured to assign the channelization code selected by either the first or second channelization code selection unit to the mobile station; and a control unit configured to control the first and second channelization code selection units, the control unit configured to (a) instruct the first channelization code selection unit to use a primary scrambling code belonging to the first frequency to look for an unused channelization code, (b) instruct the second channelization code selection unit to use a primary scrambling code belonging to the second frequency to look for an unused channelization code, in a case the first channelization code selection unit has determined that there is no unused channelization code for the primary scrambling code for the first frequency, and (c) instruct the first channelization code selection unit to use a secondary scrambling code belonging to the first frequency to look for an unused channelization code, in a case the second channelization code selection unit has determined that there is no unused channelization code for the primary scrambling code for the second frequency.