Patent ID: 9736786
Date: 2017-08-15
CPC Classifications: H04W,Y02D

Claim:
1. A terminal apparatus which is configured to communicate with a base station apparatus by using a plurality of cells including at least a primary cell and a secondary cell, comprising: reception circuitry configured to and/or programmed to decode a physical downlink control channel (PDCCH) with downlink control information format, the downlink control information format including at least a transmission power control command field; a transmission circuitry configured to and/or programmed to transmit a physical uplink control channel (PUCCH) in the primary cell; and transmission power control circuitry configured to and/or programmed to determine transmission power of the PUCCH in the primary cell based on at least a PUCCH power control adjustment parameter; wherein the PUCCH power control adjustment parameter is calculated based on by at least a value indicated by the transmission power control command field, the reception circuitry is configured to and/or programmed to receive a first random access response message for the primary cell and a second random access response message for the secondary cell; and for the reception of the first random access response message for the primary cell and the reception of the second random access response message for the secondary cell, only in a case where the reception circuitry receives the first random access response message for the primary cell, the transmission power control circuitry is configured to and/or programmed to reset the PUCCH power control adjustment parameter.