The transmitter 1520 may use a CQI report period parameter(s) for channel state information reporting for the SCell in the dormant state. For example, the transmitter 1520 reports channel state information to a BS at a period set based on the CQI report period parameter(s). In this case, the CQI report period parameter(s) for transmitting channel state information for a SCell in the dormant state is distinguished from a CQI report period parameter(s) for transmitting channel state information for a SCell in the activation state. That is, the receiver 1530 receives the activation state CQI report period parameter(s) and the dormant state CQI report period parameter(s), and the transmitter 1520 periodically transmits channel state information by applying one of the period parameters according to a state of the SCell.
In addition, the controller 1510 controls the overall operation of the UE 1500 to control the dormant state control and the channel state information transmission operation for the SCell in a CA situation required for performing the embodiments.
The transmitter 1520 and the receiver 1530 are used to transmit, to the BS and receive from the BS, signals, messages, and data necessary for performing embodiments of the present disclosure.