Patent ID: 10038521

Abstract:
The present invention relates to a wireless communication system. In a method of transmitting control information and apparatus therefor, the present invention includes receiving a PDCCH (physical control shared channel) having HARQ-ACK resource indication information in a first cell among a plurality of cells, receiving a first PDSCH (physical downlink shared channel) corresponding to the PDCCH in a second cell among a plurality of the cells, and transmitting HARQ-ACK for the first PDSCH through one of a first PUCCH (physical uplink control channel) format and a second PUCCH format. If the first cell is PCell (primary cell), the HARQ-ACK resource indication information indicates a resource of the first PUCCH format only. If the first cell is SCell (secondary cell), the HARQ-ACK resource indication information indicates one of the resource of the first PUCCH and a resource of the second PUCCH format.