A communication system comprising: a base station and; a terminal apparatus comprising: a transmission controller which, in operation, controls a transmission power of a sounding reference signal, SRS, using a first offset or a second offset which is added to the transmission power of the SRS, the difference between a first lower limit value of the first offset and a second lower limit value of the second offset being same as a difference between a first upper limit value of the first offset and a second upper limit value of the second offset; and a transmitter which, in operation, transmits, to the base station, the SRS using the controlled transmission power, wherein the SRS is a periodic SRS, P-SRS, or an aperiodic SRS, A-SRS, and both the first and the second offset for the P-SRS are independent from both the first and the second offset for the A-SRS, wherein a step width of the first offset values within the first offset setting range having the first lower limit value and a first upper limit value equals a step width of the second offset within the second offset setting range having the second lower limit value and a second upper limit value. a base station and; a terminal apparatus comprising: a transmission controller which, in operation, controls a transmission power of a sounding reference signal, SRS, using a first offset or a second offset which is added to the transmission power of the SRS, the difference between a first lower limit value of the first offset and a second lower limit value of the second offset being same as a difference between a first upper limit value of the first offset and a second upper limit value of the second offset; and a transmitter which, in operation, transmits, to the base station, the SRS using the controlled transmission power, wherein the SRS is a periodic SRS, P-SRS, or an aperiodic SRS, A-SRS, and both the first and the second offset for the P-SRS are independent from both the first and the second offset for the A-SRS, wherein a step width of the first offset values within the first offset setting range having the first lower limit value and a first upper limit value equals a step width of the second offset within the second offset setting range having the second lower limit value and a second upper limit value. a transmission controller which, in operation, controls a transmission power of a sounding reference signal, SRS, using a first offset or a second offset which is added to the transmission power of the SRS, the difference between a first lower limit value of the first offset and a second lower limit value of the second offset being same as a difference between a first upper limit value of the first offset and a second upper limit value of the second offset; and a transmitter which, in operation, transmits, to the base station, the SRS using the controlled transmission power, wherein the SRS is a periodic SRS, P-SRS, or an aperiodic SRS, A-SRS, and both the first and the second offset for the P-SRS are independent from both the first and the second offset for the A-SRS, wherein a step width of the first offset values within the first offset setting range having the first lower limit value and a first upper limit value equals a step width of the second offset within the second offset setting range having the second lower limit value and a second upper limit value.