Patent ID: 8817654

Claim:
A radio controller comprising: circuitry configured to: associate a traffic channel configuration of a mobile station with a plurality of threshold values and hold an association of the traffic channel configuration and the plurality of threshold value; extract the plurality of threshold values associated with the traffic channel configuration of the mobile station; and determine whether to change the traffic channel configuration of the mobile station to a traffic channel configuration that performs communication in a CELL_FACH state when a pattern of communication states derived from extracted threshold values satisfies a predetermined condition, wherein the traffic channel configuration of the mobile station includes a traffic channel configuration that performs High Speed-Downlink Packet Access (HSDPA) communication using an Associated Dedicated Physical Channel (A-DPCH) and a traffic channel configuration that performs HSDPA communication using a Fractional Dedicated Physical Channel (F-DPCH), and the pattern differs based on whether the mobile station communicates using the A-DPCH or the F-DPCH.