Patent ID: 8203987

Claim:
A user apparatus which wirelessly communicates with a base station apparatus within a mobile communications system, comprising: a receive unit which receives control information in downlink, the control information indicating a network signaling value, the network signaling value specified in multiple numbers, and a combination of requirements on adjacent-channel interference and a spurious emission, position of a frequency band, a channel bandwidth, the number of frequency resources, and a maximum power reduction amount being specified for each of the network signaling value; a maximum transmit power control unit which specifies a maximum transmit power reduction amount based on the network signaling value indicated in the control information received at the receive unit and modifies a maximum value of a transmit power with the maximum transmit power reduction amount; and a transmit unit which transmits a channel in uplink in accordance with the maximum value of the transmit power modified at the maximum transmit power control unit.