Method and device of transmitting a plurality of reception confirmation information

A method of transmitting acknowledgement/not-acknowledgement (ACK/NACK) of a user equipment to which a plurality of serving cells are configured in a wireless communication system, the method comprising:

• receiving a first physical downlink control channel (PDCCH) and a second PDCCH through at least one serving cell among the plurality of serving cells;
• receiving a first physical downlink shared channel (PDSCH) scheduled by the first PDCCH;
• receiving a second PDSCH scheduled by the second PDCCH;
• allocating a first physical uplink control channel (PUCCH) resource on the basis of a lowest index of a control channel element (CCE) on which the first PDCCH is transmitted;
• allocating a second PUCCH resource on the basis of a lowest index of a CCE on which the second PDCCH is transmitted;
• and
• transmitting ACK/NACK for the first PDSCH and the second PDSCH through a serving cell linked to a serving cell receiving the first PDCCH and the second PDCCH,
• wherein a transmission resource for transmitting the ACK/NACK is selected from the first PUCCH resource and the second PUCCH resource.