An apparatus of transmitting a Physical Uplink Control Channel, PUCCH, in a wireless communication system, the apparatus comprising: at least one processor; and at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising: receiving system information including a default PUCCH resource set; receiving Downlink Control Information, DCI, for scheduling a Physical Downlink Shared Channel, PDSCH; receiving the PDSCH based on the DCI; determining a Hybrid Automatic Repeat Request - Acknowledgment, HARQ-ACK, information in response to the PDSCH; based on information related to a dedicated PUCCH resource set being not received through a User Equipment, UE, specific higher layer signal: determining a PUCCH resource for a transmission of the PUCCH, based on the DCI, from the default PUCCH resource set; and based on the information related to the dedicated PUCCH resource set being received through the UE specific higher layer signal: determining a PUCCH resource for a transmission of the PUCCH, from the dedicated PUCCH resource set; and transmitting the PUCCH including the HARQ-ACK information through the determined PUCCH resource. at least one processor; and at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising: receiving system information including a default PUCCH resource set; receiving Downlink Control Information, DCI, for scheduling a Physical Downlink Shared Channel, PDSCH; receiving the PDSCH based on the DCI; determining a Hybrid Automatic Repeat Request - Acknowledgment, HARQ-ACK, information in response to the PDSCH; based on information related to a dedicated PUCCH resource set being not received through a User Equipment, UE, specific higher layer signal: determining a PUCCH resource for a transmission of the PUCCH, based on the DCI, from the default PUCCH resource set; and based on the information related to the dedicated PUCCH resource set being received through the UE specific higher layer signal: determining a PUCCH resource for a transmission of the PUCCH, from the dedicated PUCCH resource set; and transmitting the PUCCH including the HARQ-ACK information through the determined PUCCH resource. receiving system information including a default PUCCH resource set; receiving Downlink Control Information, DCI, for scheduling a Physical Downlink Shared Channel, PDSCH; receiving the PDSCH based on the DCI; determining a Hybrid Automatic Repeat Request - Acknowledgment, HARQ-ACK, information in response to the PDSCH; based on information related to a dedicated PUCCH resource set being not received through a User Equipment, UE, specific higher layer signal: determining a PUCCH resource for a transmission of the PUCCH, based on the DCI, from the default PUCCH resource set; and based on the information related to the dedicated PUCCH resource set being received through the UE specific higher layer signal: determining a PUCCH resource for a transmission of the PUCCH, from the dedicated PUCCH resource set; and transmitting the PUCCH including the HARQ-ACK information through the determined PUCCH resource.