| 摘要 |
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method in which a terminal transmits control information in a CA-based wireless communication system and to an apparatus for the method, the method comprising: a step of configuring a first cell and a second cell having different subframe configurations, wherein the second cell has any one of uplink downlink (UL-DL) configuration #0 to #6; a step of receiving a downlink control information (DCI) format including a downlink assignment index (DAI) field, for the second cell; and a step of transmitting hybrid automatic repeat request acknowledgement (HARQ-ACK) information relating to the downlink DCI format. For HARQ-ACK timing, in cases where a reference UL-DL configuration applied to the second cell is any one of UL-DL configurations #1 to #6, the DAI field is used in a process of transmitting the HARQ-ACK information. For HARQ-ACK timing, in cases where a reference UL-DL configuration applied to the second cell is #0, the DAI field is not used in a process of transmitting the HARQ-ACK information. |
