| 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, the second cell has UL-DL configuration #0; a step of receiving a downlink control information (DCI) format including an N-bit field (N>1), for the second cell; and a step of transmitting a physical uplink shared channel (PUSCH) signal corresponding to the downlink DCI format through a subframe. The N-bit field indicates either an uplink (UL) index or a downlink assignment index (DAI). For PUSCH 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 N-bit field indicates the DAI. |
| 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, a set of one or more hybrid automatic repeat request (HARQ)-acknowledgement (ACK) bits (o0,o1, . . . , oN-1) for the secondary cell, wherein oi (i=0, 1, . . . , N-1) is i-th HARQ-ACK bit and N is the number of HARQ-ACK bits, wherein if cross-carrier scheduling is configured for the secondary cell, one or more HARQ-ACK bits for the PDSCH are given as (i) o0 or (ii) o0 and o1, 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. |
