A mobile station device configured to communicate with a base station device, said mobile station device comprising: a management unit configured to generate, as uplink control information, a receipt acknowledgement indicating a positive acknowledgement or a negative acknowledgement for downlink data, and a scheduling request indicating whether to request said base station device to allocate a radio resource; a parameter setting unit configured to set a value of a first parameter relevant to transmission power based on an output value of a mathematical expression, an input value of the mathematical expression being a first number of information bits of said receipt acknowledgement and said scheduling request, and to set a second parameter based on a transmission power control command; and a transmission unit configured to control, by means of at least one of said first parameter and said second parameter, the transmission power for a first physical uplink control channel used for transmitting a first signal generated from said receipt acknowledgement and said scheduling request, and to transmit said first signal to said base station device using said first physical uplink control channel with said controlled transmission power in an uplink subframe in a case that resource of a physical uplink shared channel is not allocated, wherein a second number of information bits of said scheduling request included in the first number of information bits of said receipt acknowledgement and said scheduling request is one bit and said scheduling request is not transmitted using a second physical uplink control channel for said scheduling request in a case that said second physical uplink control channel for said scheduling request is configured in the uplink subframe and the management unit generates said receipt acknowledgement, and the second number of information bits of said scheduling request included in the first number of information bits of said receipt acknowledgement and said scheduling request is zero bit in a case that said second physical uplink control channel for said scheduling request is not configured in the uplink subframe. a management unit configured to generate, as uplink control information, a receipt acknowledgement indicating a positive acknowledgement or a negative acknowledgement for downlink data, and a scheduling request indicating whether to request said base station device to allocate a radio resource; a receipt acknowledgement indicating a positive acknowledgement or a negative acknowledgement for downlink data, and a scheduling request indicating whether to request said base station device to allocate a radio resource; a parameter setting unit configured to set a value of a first parameter relevant to transmission power based on an output value of a mathematical expression, an input value of the mathematical expression being a first number of information bits of said receipt acknowledgement and said scheduling request, and to set a second parameter based on a transmission power control command; and to set a value of a first parameter relevant to transmission power based on an output value of a mathematical expression, an input value of the mathematical expression being a first number of information bits of said receipt acknowledgement and said scheduling request, and to set a second parameter based on a transmission power control command; and a transmission unit configured to control, by means of at least one of said first parameter and said second parameter, the transmission power for a first physical uplink control channel used for transmitting a first signal generated from said receipt acknowledgement and said scheduling request, and to transmit said first signal to said base station device using said first physical uplink control channel with said controlled transmission power in an uplink subframe in a case that resource of a physical uplink shared channel is not allocated, wherein to control, by means of at least one of said first parameter and said second parameter, the transmission power for a first physical uplink control channel used for transmitting a first signal generated from said receipt acknowledgement and said scheduling request, and to transmit said first signal to said base station device using said first physical uplink control channel with said controlled transmission power in an uplink subframe in a case that resource of a physical uplink shared channel is not allocated, wherein a second number of information bits of said scheduling request included in the first number of information bits of said receipt acknowledgement and said scheduling request is one bit and said scheduling request is not transmitted using a second physical uplink control channel for said scheduling request in a case that said second physical uplink control channel for said scheduling request is configured in the uplink subframe and the management unit generates said receipt acknowledgement, and the second number of information bits of said scheduling request included in the first number of information bits of said receipt acknowledgement and said scheduling request is zero bit in a case that said second physical uplink control channel for said scheduling request is not configured in the uplink subframe.