Patent ID: 8359055

Claim:
A transmission power control method for controlling a transmission power of an uplink enhanced dedicated physical control channel, comprising: determining, at a radio network controller, that a mobile station transmitting the uplink enhanced dedicated physical control channel to only a first cell shifts to a soft handover state and transmits the uplink enhanced dedicated physical control channel to both the first cell and a second cell; determining, at the radio network controller, an uplink power offset between a desired transmission power of the uplink enhanced dedicated physical control channel and the transmission power of an uplink dedicated physical control channel; notifying, from the radio network controller to the mobile station, the uplink power offset; determining, at the mobile station, an updated transmission power of the uplink enhanced dedicated physical control channel to be transmitted to the first cell and the second cell based on the notified uplink power offset; and transmitting, at the mobile station, the uplink enhanced dedicated physical control channel to the first cell and the second cell using the updated transmission power.