Method and apparatus for transmitting control channel in intra-cell carrier aggregation system

A mobile station transmitting a feedback, the mobile station comprising:

• a communication unit configured to establish a connection with a base station through a Primary cell (Pcell) of a Time Division Duplex (TDD) scheme and a Secondary cell (Scell) of a Frequency Division Duplex (FDD) scheme, and receive data through the Scell before a timing configured as an uplink sub-frame according to a TDD UpLink-DownLink (UL-DL) configuration of the Pcell;
• and
• a controller configured to control the communication unit to transmit a feedback of the received data through the Pcell in a feedback sub-frame,
• wherein sub-frames of data, the feedback of which is to be transmitted in the feedback sub-frame, among the received data, are selected based on a sub-frame number of the feedback sub-frame and the TDD UL-DL configuration of the Pcell.

A feedback receiving method of a base station connected with a mobile station through a Primary cell (Pcell) of a Time Division Duplex (TDD) scheme and a Secondary cell (Scell) of a Frequency Division Duplex (FDD) scheme, the feedback receiving method comprising:

• transmitting data through the Scell before a timing configured as an uplink sub-frame according to a TDD UL-DL configuration of the Pcell;
• and
• receiving a feedback of the transmitted data through the Pcell in a feedback sub-frame,
• wherein the feedback received in the feedback sub-frame comprises feedbacks of data transmitted in sub-frames selected based on a sub-frame number of the feedback sub-frame and the TDD UL-DL configuration of the Pcell.

A base station receiving a feedback, the base station comprising:

• a communication unit configured to establish a connection with a mobile station through a Primary cell (Pcell) of a Time Division Duplex (TDD) scheme and a Secondary cell (Scell) of a Frequency Division Duplex (FDD) scheme, and transmit data through the Scell before a timing configured as an uplink sub-frame according to a TDD UL-DL configuration of the Pcell;
• and
• a controller configured to control the communication unit to receive a feedback of the transmitted data through the Pcell in a feedback sub-frame,
• wherein the feedback received in the feedback sub-frame comprises feedbacks of data transmitted in sub-frames selected based on a sub-frame number of the feedback sub-frame and the TDD UL-DL configuration of the Pcell.