Method and device for transmitting control information

A method for transmitting uplink control information by a communication apparatus configured with a plurality of cells including a Primary Cell (PCell) and a Secondary Cell (SCell) in a wireless communication system, the method comprising:

• receiving, by the communication apparatus, at least one Physical Downlink Shared Channel (PDSCH) on the plurality of cells in a first subframe;
• and
• transmitting, by the communication apparatus, Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) information about the PDSCH through a Physical Uplink Control Channel (PUCCH) in a second subframe configured for Scheduling Request (SR) transmission,
• wherein for a positive SR in the second subframe, and only if one PDSCH is detected on the PCell among the plurality of cells in the first subframe, the HARQ-ACK information is transmitted using a SR PUCCH resource,
• wherein for a negative SR in the second subframe, and only if one PDSCH is detected on the PCell among the plurality of cells in the first subframe, the HARQ-ACK information is transmitted using a HARQ-ACK PUCCH resource different from the SR PUCCH resource, the HARQ-ACK PUCCH resource being determined by using an index of a resource constituting a Physical Downlink Control Channel (PDCCH) corresponding to the one PDSCH detected on the PCell among the plurality of cells in the first subframe, and
• wherein if at least one PDSCH is detected on the SCell among the plurality of cells in the first subframe, the HARQ-ACK information and one-bit information indicating either a positive SR or a negative SR are transmitted using another HARQ-ACK PUCCH resource configured by a first Radio Resource Control (RRC) signaling.