Method of transmitting and receiving downlink data channel and apparatus therefor

1. A method of receiving a Physical Downlink Shared Channel (PDSCH) by a user equipment (UE) in a wireless communication system, the method comprising:

receiving, in a first bandwidth part (BWP), a downlink control information (DCI) that comprises (i) first information that indicates switching an active BWP from the first BWP to a second BWP, and (ii) second information related to scheduling at least one 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 a number of TBs in a first group of TBs that can be scheduled through the second information being equal to one, and based on a number of TBs in a second group of TBs that can be scheduled for the second BWP being equal to two:

among the second information related to scheduling the at least one TB, information related to a second TB among the second group of TBs is disabled.

2. The method of claim 1 , wherein the second information related to scheduling the at least one TB comprises:

a set of bits related to a Modulation and Coding Scheme (MCS), a New Data Indicator (NDI), and a Redundancy Version (RV).

3. The method of claim 1 , wherein the information related to the second TB is zero-padded.

4. The method of claim 1 , wherein the information related to the second TB is ignored.

5. The method of claim 1 , wherein transmission configuration information (TCI) for the second BWP is same as TCI information related to the DCI.

6. The method of claim 5 , wherein the TCI information related to the DCI comprises: TCI information for a Control Resource Set (CORESET) that is related to the DCI.

7. An apparatus configured to receive 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), a downlink control information (DCI) that comprises (i) first information that indicates switching an active BWP from the first BWP to a second BWP, and (ii) second information related to scheduling at least one 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 a number of TBs in a first group of TBs that can be scheduled through the second information being equal to one, and based on a number of TBs in a second group of TBs that can be scheduled for the second BWP being equal to two:

among the second information related to scheduling the at least one TB, information related to a second TB among the second group of TBs is disabled.

8. The apparatus of claim 7 , wherein the second information related to scheduling the at least one TB comprises:

a set of bits related to a Modulation and Coding Scheme (MCS), a New Data Indicator (NDI), and a Redundancy Version (RV).

9. The apparatus of claim 7 , wherein the information related to the second TB is zero-padded.

10. The apparatus of claim 7 , wherein the information related to the second TB is ignored.

11. The apparatus of claim 7 , wherein transmission configuration information (TCI) for the second BWP is same as TCI information related to the DCI.

12. The apparatus of claim 11 , wherein the TCI information related to the DCI comprises: TCI information for a Control Resource Set (CORESET) that is related to the DCI.

13. The apparatus of claim 7 , wherein the apparatus is a user equipment (UE) that is configured to receive the PDSCH, the UE comprising a transceiver, the at least one processor, and the at least one memory.

14. A method of transmitting a Physical Downlink Shared Channel (PDSCH) in a wireless communication system, the method comprising:

transmitting, in a first bandwidth part (BWP), a downlink control information (DCI) that comprises (i) first information that indicates switching an active BWP from the first BWP to a second BWP, and (ii) second information related to scheduling at least one transport block (TB) for the PDSCH; and

transmitting, in the second BWP, the PDSCH based on the first information and the second information,

wherein based on a number of TBs in a first group of TBs that can be scheduled through the second information being equal to one, and based on a number of TBs in a second group of TBs that can be scheduled for the second BWP being equal to two:

among the second information related to scheduling the at least one TB, information related to a second TB among the second group of TBs is disabled.

15. A base station (BS) configured to transmit a Physical Downlink Shared Channel (PDSCH) in a wireless communication system, the BS comprising:

a 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:

transmitting, in a first bandwidth part (BWP), a downlink control information (DCI) that comprises (i) first information that indicates switching an active BWP from the first BWP to a second BWP, and (ii) second information related to scheduling at least one transport block (TB) for the PDSCH; and

transmitting, in the second BWP, the PDSCH based on the first information and the second information,

wherein based on a number of TBs in a first group of TBs that can be scheduled through the second information being equal to one, and based on a number of TBs in a second group of TBs that can be scheduled for the second BWP being equal to two:

among the second information related to scheduling the at least one TB, information related to a second TB among the second group of TBs is disabled.