Patent ID: 8335168

Claim:
A base station apparatus in a mobile communication system, the base station apparatus comprising: a measurement unit configured to measure received quality of a reference signal transmitted from a user equipment terminal; a scheduling unit configured to provide scheduling information indicating allocation of a radio resource in uplink; and a transmission unit configured to transmit a control signal to the user equipment terminal, the control signal including the scheduling information, wherein in a case where, after a first packet is transmitted from the user equipment terminal using a first frequency band, a retransmission packet corresponding to the first packet is transmitted from the user equipment terminal using a second frequency band other than the first frequency band, the control signal further includes information indicating a difference between received quality in the first frequency band and received quality in the second frequency band, and the retransmission packet is transmitted from the user equipment terminal at a transmission power level determined by adding a transmission power level of the first packet to a transmission power level corresponding to the difference.