A method for transmitting control information by a user equipment, UE, in a wireless communication system, the UE configured with a primary cell set to uplink-downlink, UL-DL, configuration #0 and a secondary cell set to one of UL-DL configurations #1 to #6, the method comprising: receiving (S1704) a downlink control information, DCI, format comprising resource allocation information and a value of a downlink assignment index, DAI, field, for the secondary cell; receiving (S502_0~M-1) a physical downlink shared channel, PDSCH, indicated by the resource allocation information of the DCI format through the secondary cell; and transmitting (S504, S1706) hybrid automatic repeat request, HARQ,-acknowledgement, ACK, information related to the PDSCH, wherein: if a carrier indicator field, CIF, is not present in the DCI format, the value of the DAI field is used in a procedure for transmitting the HARQ-ACK information, if the CIF is present in the DCI format, the value of the DAI field is not used in the procedure for transmitting the HARQ-ACK information, and subframe configurations according to the UL-DL configurations #0 to #6 are given as shown in the following table: UL-DL Configuration Subframe Number 0 1 2 3 4 5 6 7 8 9 0 D S U U U D S U U U 1 D S U U D D S U U D 2 D S U D D D S U D D 3 D S U U U D D D D D 4 D S U U D D D D D D 5 D S U D D D D D D D 6 D S U U U D S U U D where, D denotes a DL subframe, U denotes a UL subframe, and S denotes a special subframe. receiving (S1704) a downlink control information, DCI, format comprising resource allocation information and a value of a downlink assignment index, DAI, field, for the secondary cell; receiving (S502_0~M-1) a physical downlink shared channel, PDSCH, indicated by the resource allocation information of the DCI format through the secondary cell; and transmitting (S504, S1706) hybrid automatic repeat request, HARQ,-acknowledgement, ACK, information related to the PDSCH, wherein: if a carrier indicator field, CIF, is not present in the DCI format, the value of the DAI field is used in a procedure for transmitting the HARQ-ACK information, if the CIF is present in the DCI format, the value of the DAI field is not used in the procedure for transmitting the HARQ-ACK information, and subframe configurations according to the UL-DL configurations #0 to #6 are given as shown in the following table: UL-DL Configuration Subframe Number 0 1 2 3 4 5 6 7 8 9 0 D S U U U D S U U U 1 D S U U D D S U U D 2 D S U D D D S U D D 3 D S U U U D D D D D 4 D S U U D D D D D D 5 D S U D D D D D D D 6 D S U U U D S U U D where, D denotes a DL subframe, U denotes a UL subframe, and S denotes a special subframe. if a carrier indicator field, CIF, is not present in the DCI format, the value of the DAI field is used in a procedure for transmitting the HARQ-ACK information, if the CIF is present in the DCI format, the value of the DAI field is not used in the procedure for transmitting the HARQ-ACK information, and subframe configurations according to the UL-DL configurations #0 to #6 are given as shown in the following table: UL-DL Configuration Subframe Number 0 1 2 3 4 5 6 7 8 9 0 D S U U U D S U U U 1 D S U U D D S U U D 2 D S U D D D S U D D 3 D S U U U D D D D D 4 D S U U D D D D D D 5 D S U D D D D D D D 6 D S U U U D S U U D where, D denotes a DL subframe, U denotes a UL subframe, and S denotes a special subframe. <EOS>