Patent ID: 8139523

Claim:
A mobile communication system, in which a mobile station is configured to transmit a dedicated physical control channel (DPCCH) and an enhanced dedicated physical data channel (E-DPDCH) to a first cell, the mobile station is configured to transmit the enhanced dedicated physical data channel to a second cell, and the enhanced dedicated physical data channel is configured to have a transmission power offset relative to the dedicated physical control channel, wherein: the first cell is configured to control a transmission power of the dedicated physical control channel; and to transmit transmission rate designation information for designating a transmission rate of the enhanced dedicated physical data channel, to the mobile station; the second cell is configured not to control the transmission power of the dedicated physical control channel, and to transmit, to the mobile station, transmission rate control information for controlling the transmission rate of the enhanced dedicated physical data channel; the mobile station is configured to transmit the dedicated physical control channel and the enhanced dedicated physical data channel, on the basis of a transmission power controlled by the first cell, and to determine the transmission rate of the enhanced dedicated physical data channel, on the basis of the transmission rate designation information and the transmission rate control information; a hard hand over is performed for the dedicated physical control channel; and a soft handover is performed for the enhanced dedicated physical data channel.