Patent ID: 7376422

Claim:
A mobile communication system comprising: a mobile wireless terminal; and a base station device; wherein data is transmitted by an HSDPA (High Speed Downlink Packet Access) method from said base station device to said mobile wireless terminal and wherein, said base station device transmits, prior to data transmission employing said HSDPA method, control data that gives advance notice of the data transmission employing said HSDPA method through an HS-SCCH (High Speed-Shared Control CHannel) to said mobile wireless terminal, and wherein said mobile wireless terminal, when receiving said control data from said base station device, increases power to be supplied for data transmission through an HS-DPCCH (High Speed—Dedicated Physical Control CHannel), wherein said control data contains one of empty patterns of a channelization code set for an HS-SCCH as information to give the advance notice of the data transmission.