| 摘要 |
The present invention relates to a wireless communication system, particularly, a method in which a terminal transmits control information in a CA-based wireless communication system and an apparatus for the method, the method comprising: configuring a first cell and a second cell having different subframe configurations, wherein the second cell has any one of UL-DL configuration #0 to #6; receiving a DC) format including a DAI field, for the second cell; and transmitting 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. |
| 主权项 |
1. A method for transmitting control information in a communication system by a user equipment (UE) configured with a primary cell having uplink-downlink (UL-DL) configuration #0 and a secondary cell having one of UL-DL configurations #1 to #6, the method comprising:
receiving, by the UE, a downlink control information (DCI) format comprising resource allocation information and a downlink assignment index (DAI) field, for the secondary cell; receiving, by the UE, a physical downlink shared channel (PDSCH) indicated by the DCI format through the secondary cell; and transmitting, by the UE, hybrid automatic repeat request (HARQ)-acknowledgement (ACK) information for the PDSCH, wherein if a carrier indicator field (CIF) is enabled in the DCI format, the DAI field is not used in a procedure for transmitting the HARQ-ACK information, regardless of the value of the DAI field in the DCI format, and wherein subframe configurations according to the UL-DL configurations #0 to #6 are shown in the following table 1:TABLE 1UL-DLSubframe NumberConfiguration01234567890DSUUUDSUUU1DSUUDDSUUD2DSUDDDSUDD3DSUUUDDDDD4DSUUDDDDDD5DSUDDDDDDD6DSUUUDSUUD where, D denotes a DL subframe, U denotes a UL subframe, and S denotes a special subframe. |
