Patent ID: 9419766
Filing Date: 2016-08-16
CPC Classification: H04B,H04J,H04L,H04W

Claim Text:
1. A radio communication terminal apparatus comprising: a receiver which, in operation, receives control information including a transmission request for a sounding reference signal (SRS), and including a transmission power control command (TPC command) for transmission of the SRS, a controller which, in operation, controls a transmission power value of the SRS using a first accumulation value of the TPC command updated with the received TPC command, and controls transmission of the SRS using the received transmission request for the SRS, and a transmitter which, in operation, transmits the SRS with the controlled transmission power value, wherein, the controller, in operation, controls the transmission power value of the SRS using a second accumulation value different from the first accumulation value, the second accumulation value being updated with a TPC command transmitted in a specific subframe and in a specific DCI format, and resets the second accumulation value of the TPC command to zero when a transmission power parameter is changed by higher layer control information.