A method of transmitting Acknowledgement/Negative Acknowledgement, ACK/NACK, information by a User Equipment, UE, configured with a plurality of serving cells in a Time Division Duplex, TDD, wireless communication system, the method comprising: receiving, through a higher layer configuration signaling, information regarding a plurality of Physical Uplink Control Channel, PUCCH, format 3 resources; receiving at least one downlink transmission comprising at least one Physical Downlink Control Channel, PDCCH, in a subframe set including M subframes, wherein the M is greater than 1; and transmitting, through a PUCCH, ACK/NACK information related with the at least one downlink transmission, characterized in that , based on the UE receiving the at least one PDCCH only on a Primary Cell, PCell (S3220): based on the at least one PDCCH including only a first PDCCH having a Downlink Assignment Index, DAI, value equal to an initial value: the PUCCH is transmitted based on PUCCH format 1a/1b, and a PUCCH format 1a/1b resource for the PUCCH is determined based on the lowest control channel element, CCE, index of the first PDCCH (S3260), and based on the at least one PDCCH including a second PDCCH that has a DAI value greater than the initial value: the PUCCH is transmitted based on PUCCH format 3, and a PUCCH format 3 resource for the PUCCH, through which the ACK/NACK information is transmitted, is selected from the plurality of PUCCH format 3 resources based on a value of a Transmit Power Control, TPC, field in the second PDCCH (S3270). receiving, through a higher layer configuration signaling, information regarding a plurality of Physical Uplink Control Channel, PUCCH, format 3 resources; receiving at least one downlink transmission comprising at least one Physical Downlink Control Channel, PDCCH, in a subframe set including M subframes, wherein the M is greater than 1; and transmitting, through a PUCCH, ACK/NACK information related with the at least one downlink transmission, characterized in that , based on the UE receiving the at least one PDCCH only on a Primary Cell, PCell (S3220): based on the at least one PDCCH including only a first PDCCH having a Downlink Assignment Index, DAI, value equal to an initial value: the PUCCH is transmitted based on PUCCH format 1a/1b, and a PUCCH format 1a/1b resource for the PUCCH is determined based on the lowest control channel element, CCE, index of the first PDCCH (S3260), and based on the at least one PDCCH including a second PDCCH that has a DAI value greater than the initial value: the PUCCH is transmitted based on PUCCH format 3, and a PUCCH format 3 resource for the PUCCH, through which the ACK/NACK information is transmitted, is selected from the plurality of PUCCH format 3 resources based on a value of a Transmit Power Control, TPC, field in the second PDCCH (S3270). based on the at least one PDCCH including only a first PDCCH having a Downlink Assignment Index, DAI, value equal to an initial value: the PUCCH is transmitted based on PUCCH format 1a/1b, and a PUCCH format 1a/1b resource for the PUCCH is determined based on the lowest control channel element, CCE, index of the first PDCCH (S3260), and based on the at least one PDCCH including a second PDCCH that has a DAI value greater than the initial value: the PUCCH is transmitted based on PUCCH format 3, and a PUCCH format 3 resource for the PUCCH, through which the ACK/NACK information is transmitted, is selected from the plurality of PUCCH format 3 resources based on a value of a Transmit Power Control, TPC, field in the second PDCCH (S3270). <EOS>