Operating methods of user equipment and base station in wireless communication system, and device supporting same

A User Equipment (UE) operating in a wireless communication system, the UE comprising:

• at least one transceiver;
• 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, from a base station, a synchronization signal/physical broadcast channel (SS/PBCH) block including an SS and a PBCH;
• performing a procedure of access to the base station including transmission of a random access channel (RACH) preamble based on the received SS/PBCH block;
• receiving, from the base station, downlink control information (DCI) including (i) a plurality of transmission configuration indicator (TCI) states and (ii) information for two transport blocks (TBs);
• acquiring, from the base station, mode information related to a first mode for transmission of a plurality of data, the data being based on the same information;
• based on the DCI and the mode information, assuming that (i) data reception is scheduled from a plurality of transmission reception points (TRPs) by the DCI, and (ii) data received from the plurality of TRPs is based on the same information;
• based on the assumption, determining a transport block size (TBS) related to the data based on information related to one TB between the two TBs related to the DCI;
• and
• acquiring data information from the plurality of TRPs based on the TBS.

A base station operating in a wireless communication system, the base station comprising:

• at least one transmitter;
• at least one receiver;
• 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:
• transmitting, to a UE, a synchronization signal/physical broadcast channel (SS/PBCH) block including an SS and a PBCH;
• performing a procedure of establishing a connection with the UE based on the transmitted SS/PBCH block;
• transmitting, to the UE, downlink control information (DCI) including a plurality of transmission configuration indicator (TCI) states;
• transmitting, to the UE, DCI including (i) a plurality of transmission configuration indicator (TCI) states and (ii) information for two transport blocks (TBs);
• providing the UE with mode information related to a first mode for transmission of a plurality of data, the data being based on the same information;
• and
• based on the DCI and the mode information, transmitting data information to the UE through a plurality of transmission reception points (TRPs),
• wherein a transport block size (TBS) related to the data information is related to information related to one of the two TBs related to the DCI.