Method for receiving PUSCH in wireless communication system and apparatus therefor

1. A method for receiving, by a base station, a Physical Uplink Shared Channel (PUSCH) in a wireless communication system, the method comprising:

transmitting a first message including information related to a configuration of a the PUSCH;

transmitting a second message which is related to a spatial relation RS applied to a transmission of the PUSCH; and

receiving the PUSCH which is transmitted with a beam determined based on the spatial relation RS,

wherein the PUSCH is configured to be received repeatedly across a plurality of time units

wherein the plurality of time units based on a plurality of slot groups,

wherein the second message includes information for at least one spatial relation RS applied to each of the plurality of slot groups,

wherein the at least one spatial relation RS is based on at least one SRS Resource Indicator (SRI),

wherein the beam includes a plurality of beams determined for the plurality of slot groups, and

wherein the second message further includes information for at least one Transmission Precoding Matrix Indicator (TPMI) applied to each of the plurality of slot groups.

2. The method of claim 1 , wherein at least one spatial relation RS applied to the each slot group is related to at least one layer of all layers related to the transmission of the PUSCH.

3. The method of claim 2 , wherein the all layers are classified into a plurality of layer groups including at the at least one layer, and

wherein at least one spatial relation RS applied to each slot group is applied to each layer group among the plurality of layer groups.

4. The method of claim 2 , wherein at least one spatial relation RS applied to the each slot group is applied to the all layers.

5. The method of claim 1 , wherein the first message further includes a list of a plurality of spatial relation states,

wherein a constitution of each spatial relation state included in the list is configured by a multiple access control-control element (MAC CE), and

wherein the spatial relation state is comprised of at least one spatial relation RS applied to the plurality of slot groups.

6. The method of claim 5 , wherein the second message is Downlink Control Information (DCI), and

wherein the information for at least one spatial relation RS is related to any one spatial relation state of the plurality of spatial relation states.

7. The method of claim 1 , wherein the first message further includes information of spatial relation RSs applied to the plurality of slot groups, and

wherein the information for at least one spatial relation RS indicates a spatial relation RS to be applied as a default.

8. The method of claim 1 , wherein the first message further includes information on remaining spatial relation RSs other than at least one specific spatial relation RS of the spatial relation RSs applied to the plurality of slot groups, and

wherein the information for at least one spatial relation RS is related to the at least one specific spatial relation RS, and the specific spatial relation RS is applied to a specific slot group of the plurality of slot groups.

9. The method of claim 1 , wherein the at least one spatial relation RS is mapped to slots which belong to the each slot group and the mapped spatial relation RS is changed for each slot among the slots.

10. The method of claim 1 , wherein the at least one spatial relation RS is mapped to the slots which belong to the each slot group and the mapped spatial relation RS is changed for each slot group.

11. The method of claim 1 , wherein the at least one spatial relation RS is mapped to the slots which belong to the each slot group and the mapped spatial relation RS is changed every at least two slots of the slots.

12. The method of claim 1 , wherein the second message is (i) Downlink Control Information (DCI) for scheduling the transmission of the PUSCH, or (ii) Downlink control information (DCI) or a Multiple Access Control (MAC) Control Element (CE) for activating semi-persistent transmission of the PUSCH.

13. The method of claim 1 , wherein the plurality of beams determined for the plurality of slot groups are related to a plurality of Transmission and Reception Points (TRPs).

14. A base station for receiving a Physical Uplink Shared Channel (PUSCH) in a wireless communication system, the base station comprising:

one or more transceivers;

one or more processors; and

one or more memories operably connectable to the one or more processors, and storing instructions of performing operations based on being executed by the one or more processors,

wherein the operations comprise:

transmitting a first message including information related to a configuration of a the PUSCH,

transmitting a second message which is related to a spatial relation RS applied to a transmission of the PUSCH, and

receiving the PUSCH which is transmitted with a beam determined based on the spatial relation RS,

wherein the PUSCH is configured to be received repeatedly across a plurality of time units

wherein the plurality of time units are based on a plurality of slot groups,

wherein the second message includes information for at least one spatial relation RS applied to each of the plurality of slot groups,.

wherein the at least one spatial relation RS is based on at least one SRS Resource Indicator (SRI),

wherein the beam includes a plurality of beams determined for the plurality of slot groups, and

wherein the second message further includes information for at least one Transmission Precoding Matrix Indicator (TPMI) applied to each of the plurality of slot groups.

15. The base station of claim 14 , wherein the plurality of beams determined for the plurality of slot groups are related to a plurality of Transmission and Reception Points (TRPs).

16. An apparatus comprising:

one or more memories; and

one or more processors functionally connected to the one or more memories,

wherein the one or more processors are configured to control the apparatus to:

transmit a first message including information related to a configuration of a the PUSCH,

transmit a second message which is related to a spatial relation RS applied to a transmission of the PUSCH, and

receive the PUSCH which is transmitted with a beam determined based on the spatial relation RS,

wherein the PUSCH is configured to be received repeatedly across a plurality of time units

wherein the plurality of time units are based on a plurality of slot groups,

wherein the second message includes information for at least one spatial relation RS applied to each of the plurality of slot groups,

wherein the at least one spatial relation RS is based on at least one SRS Resource Indicator (SRI),

wherein the beam includes a plurality of beams determined for the plurality of slot groups, and

wherein the second message further includes information for at least one Transmission Precoding Matrix Indicator (TPMI) applied to each of the plurality of slot groups.

17. The apparatus of claim 16 , wherein the plurality of beams determined for the plurality of slot groups are related to a plurality of Transmission and Reception Points (TRPs).