Method and device for transmitting and receiving signals in wireless communication system

A user equipment (UE) for transmitting and receiving a signal in a wireless communication system, the UE comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one memory operably coupled to the at least one processor and storing instructions which when executed, cause the at least one processor to perform a specific operation,
• wherein the specific operation includes:
• receiving downlink data on a primary cell (PCell), wherein a value of a downlink assignment index (DAI) included in Downlink Control Information (DCI) for scheduling the downlink data is 1;
• and
• transmitting hybrid automatic repeat request (HARQ) information for the downlink data,
• wherein based on a scheduling request (SR) transmission being configured in a subframe in which the HARQ information is transmitted, (i) the HARQ information and (ii) an SR are transmitted together in the subframe, and
• wherein based on multi-radio dual connectivity (MR-DC) between evolved universal terrestrial radio access (E-UTRA) and new radio (NR) being configured for the UE, (i) the HARQ information and (ii) the SR are transmitted in a resource related to physical uplink control channel (PUCCH) format 3, and
• wherein, based on dual connectivity (DC) is configured for the UE and the DC being not the MR-DC, (i) the HARQ information and (ii) the SR are transmitted in a resource related to PUCCH format 1b.

An apparatus for a user equipment (UE), comprising:

• at least one processor;
• and
• at least one computer memory operably coupled to the at least one processor and when executed, causing the at least one processor to perform an operation,
• wherein the operation includes:
• receiving downlink data on a primary cell (PCell), wherein a value of a downlink assignment index (DAI) included in Downlink Control Information (DCI) for scheduling the downlink data is 1;
• and
• transmitting hybrid automatic repeat request (HARQ) information for the downlink data,
• wherein based on a scheduling request (SR) transmission being configured in a subframe in which the HARQ information is transmitted, (i) the HARQ information and (ii) an SR are transmitted together in the subframe, and
• wherein based on multi-radio dual connectivity (MR-DC) between evolved universal terrestrial radio access (E-UTRA) and new radio (NR) being configured for the UE, (i) the HARQ information and (ii) the SR are transmitted in a resource related to physical uplink control channel (PUCCH) format 3, and
• wherein, based on dual connectivity (DC) is configured for the UE and the DC being not the MR-DC, (i) the HARQ information and (ii) the SR are transmitted in a resource related to PUCCH format 1b.