Terminal apparatus, base station and communication method

A system comprising:

• a terminal apparatus, and
• a base station including:
• a first transmitter which, in operation, transmits an offset value for a transmission power of a sounding reference signal (SRS) to the terminal apparatus, and
• a receiver which, in operation, receives the SRS according to the controlled transmission power from the terminal apparatus, wherein
• the terminal apparatus includes:
• a transmission controller which, in operation, controls the transmission power of the SRS using the offset value which is received from the base station, and
• a second transmitter which, in operation, transmits the SRS using the controlled transmission power,
• wherein
• the offset value used to control the transmission power is set within one of a first offset setting range having a first lower limit value and a first upper limit value and a second offset setting range having a second lower limit value and a second upper limit value, wherein a difference between the first lower limit value and the second lower limit value is equal to a difference between the first upper limit value and the second upper limit value,
• a step width of the offset values within the first offset setting range equals a step width of the offset values within the second offset setting range, and
• the SRS is a periodic SRS (P-SRS) or an aperiodic SRS (A-SRS).