Method for transmitting control information, and apparatus therefor

A user equipment (UE) for transmitting control information in a wireless communication system, the UE comprising:

• a radio frequency (RF) unit;
• and
• a processor, wherein the processor is configured to
• detect one or more physical downlink shared channels (PDSCHs) on a plurality of cells, the plural cells being divided into a first cell set including a primary cell (PCell) and a first secondary cell (SCell) and a second cell set including one or more second SCells, and
• transmit hybrid automatic repeat request acknowledgement (HARQ-ACK) information through a physical uplink control channel (PUCCH) as feedback for the one or more PDSCHs, and
• wherein, if the one or more PDSCHs are detected only on the first cell set, the HARQ-ACK information includes HARQ-ACK responses only for the first cell set, and
• if the one or more PDSCHs are detected at least on the second cell set, the HARQ-ACK information includes HARQ-ACK responses for both the first and second cell sets.