Method of transmitting and receiving downlink signal between user equipment and base station in wireless communication system, and apparatus for supporting the same

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

• at least one receiver;
• at least one processor;
• and
• at least one memory operably connected to the at least one processor, for storing instructions for causing the at least one processor to perform a specific operation when the at least one processor is executed,
• wherein the specific operation includes:
• receiving downlink control information (DCI) for scheduling one or more physical downlink shared channels (PDSCHs);
• assuming that a second PDSCH scheduled for the UE is present so as to overlap with a first PDSCH scheduled by the DCI on a time resource, based on a plurality of transmission configuration indication (TCI) states related to one reference resource (RS) set, the plurality of TCI states being allocated to the UE by the DCI;
• and
• receiving the first PDSCH based on one of RS sets related to (i) the assumption and (ii) the plurality of TCI states.

A base station (BS) for transmitting a downlink signal in a wireless communication system, the BS comprising:

• at least one transmitter;
• at least one processor;
• and
• at least one memory operably connected to the at least one processor, for storing instructions for causing the at least one processor to perform a specific operation when the at least one processor is executed,
• wherein the specific operation includes:
• transmitting downlink control information (DCI) for scheduling one or more physical downlink shared channels (PDSCHs) to a user equipment (UE),
• wherein a first PDSCH scheduled by the DCI overlaps with a second PDSCH scheduled for the UE by the DCI or another DCI on a time resource;
• and
• transmitting the first PDSCH and the second PDSCH to the UE.