Method of transmitting and receiving downlink data channel and apparatus therefor

An apparatus for receiving a Physical Downlink Shared Channel (PDSCH) in a wireless communication system, the apparatus comprising:

• at least one processor;
• and
• at least one memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
• receiving, in a first Bandwidth Part (BWP), Downlink Control Information (DCI) including first information for switching an active BWP from the first BWP to a second BWP and second information related to a Transport Block (TB) for the PDSCH;
• and
• receiving, in the second BWP, the PDSCH based on the first information and the second information,
• wherein, based on (i) the DCI scheduling only 1 TB and (ii) the second BWP supporting 2 TBs, information related to a second TB among the 2 TBs is disabled.

A user equipment (UE) for receiving a Physical Downlink Shared Channel (PDSCH) in a wireless communication system, the UE comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
• receiving, in a first Bandwidth Part (BWP), Downlink Control Information (DCI) including first information for switching an active BWP from the first BWP to a second BWP and second information related to a Transport Block (TB) for the PDSCH;
• and
• receiving, in the second BWP, the PDSCH based on the first information and the second information,
• wherein, based on (i) the DCI scheduling only 1 TB and (ii) the second BWP supporting 2 TBs, information related to a second TB among the 2 TBs is disabled.