Patent ID: 9661588
Date: 2017-05-23
CPC Classifications: H04L,H04W

Claim:
1. A radio communication terminal apparatus comprising: transmission power calculating circuitry which, in operation, calculates transmission power of a plurality of uplink channels on a plurality of component carriers of carrier aggregation; power scaling detecting circuitry which, in operation, detects, using the calculated transmission power, whether or not a total value of the transmission power of the uplink channels transmitted on the plurality of component carriers exceeds maximum transmission power specific to the apparatus and whether or not power scaling occurs as a result; and power scaling controlling circuitry which, in operation, preferentially allocates, when the power scaling detecting circuitry detects that power scaling occurs and when a plurality of reference signals are transmitted using a primary cell and a secondary cell, transmission power with respect to a reference signal of the primary cell over a reference signal of the secondary cell, wherein the power scaling controlling circuitry, in operation, selects a periodic reference signal on a component carrier in accordance with a length of a transmission cycle of a periodic reference signal, and lowers power allocation priority for the selected periodic reference signal, reduces transmission power of the selected periodic reference signal, stops transmission thereof or sets the transmission power thereof to be equal to zero.