Method and apparatus for transmitting and receiving channel state information-reference signal (CSI-RS)

1. A method of transmitting, by a base station, a channel state information (CSI)-reference signal (RS) in a wireless communication system, the method comprising:

configuring control information for a plurality of CSI-RS resources, with the control information indicating that an antenna port for the plurality of CSI-RS resources configured for tracking at least one of a time or a frequency is the same;

transmitting, to a user equipment (UE), the control information; and

transmitting, to the UE, the CSI-RS through the same antenna port on the plurality of CSI-RS resources based on the control information,

wherein the plurality of CSI-RS resources are configured in a single slot and located at different symbol locations in the single slot, and only one of the plurality of CSI-RS resources is located at a single symbol in the single slot, and

wherein different symbol locations of the plurality of CSI-RS resources in the single slot are not contiguous.

2. The method of claim 1 , wherein the UE is in a radio resource control (RRC) connected state.

3. The method of claim 1 , wherein code division multiplexing (CDM) is not applied to the plurality of CSI-RS resources.

4. The method of claim 1 , wherein a frequency domain density of each of the plurality of CSI-RS resources is greater than 1.

5. The method of claim 1 , wherein the plurality of CSI-RS resources are not configured both for the tracking and for reporting layer 1(L1)-reference signal received power (RSRP).

6. The method of claim 1 , wherein a first CSI-RS resource, among the plurality of CSI-RS resources that are used for the tracking is quasi co-located (QCL) with (i) a second CSI-RS resource that is used for CSI acquisition, (ii) a third CSI-RS resource that is used for beam management, or (iii) a synchronization signal/physical broadcast channel block (SSB).

7. The method of claim 1 , wherein a linkage between the plurality of CSI-RS resources and a specific report setting is set.

8. The method of claim 7 , wherein the specific report setting is null report setting.

9. The method of claim 1 , further comprising:

receiving, from the UE, information related to a time-domain density of the CSI-RS resources.

10. A method of receiving, by a user equipment (UE), a channel state information (CSI)-reference signal (RS) in a wireless communication system, the method comprising:

receiving, from a base station, configuration information for a plurality of CSI-RS resources, wherein the configuration information comprises control information indicating that an antenna port for the plurality of CSI-RS resources configured for tracking at least one of a time or a frequency is the same;

receiving, from the base station, the CSI-RS through the same antenna port on the plurality of CSI-RS resources based on the control information; and

tracking at least one of the time or the frequency based on the CSI-RS,

wherein the plurality of CSI-RS resources are configured in a single slot and located at different symbol locations in the single slot, and only one of the plurality of CSI-RS resources is located at a single symbol in the single slot, and

wherein different symbol locations of the plurality of CSI-RS resources in the single slot are not contiguous.

11. A terminal configured to receive a channel state information (CSI)-reference signal (RS) in a wireless communication system, the terminal comprising:

a transmitter configured to transmit a wireless signal;

a receiver configured to receive a wireless signal;

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 perform operations comprising:

receiving, from a base station, configuration information for a plurality of CSI-RS resources, wherein the configuration information comprises control information indicating that an antenna port for the plurality of CSI-RS resources configured for tracking at least one of a time or a frequency is the same;

receiving, from the base station, the CSI-RS through the same antenna port on the plurality of CSI-RS resources based on the control information; and

tracking at least one of the time or the frequency based on the CSI-RS,

wherein the plurality of CSI-RS resources are configured in a single slot and located at different symbol locations in the single slot, and only one of the plurality of CSI-RS resources is located at a different single symbol in the single slot, and

wherein different symbol locations of the plurality of CSI-RS resources in the single slot are not contiguous.

12. The method of claim 10 , wherein the UE is in a radio resource control (RRC) connected state.

13. The method of claim 10 , wherein code division multiplexing (CDM) is not applied to the plurality of CSI-RS resources.

14. The method of claim 10 , wherein a frequency domain density of each of the plurality of CSI-RS resources is greater than 1.

15. The method of claim 10 , wherein the plurality of CSI-RS resources are not configured both for the tracking and for reporting layer1 (L1)-reference signal received power (RSRP).

16. The method of claim 10 , wherein a first CSI-RS resource, among the plurality of CSI-RS resources that are used for the tracking is quasi co-located (QCL) with (i) a second CSI-RS resource that is used for CSI acquisition, (ii) a third CSI-RS resource that is used for beam management, or (iii) a synchronization signal/physical broadcast channel block (SSB).

17. The method of claim 10 , wherein a linkage between the plurality of CSI-RS resources and a specific report setting is set.

18. The method of claim 17 , wherein the specific report setting is null report setting.

19. The method of claim 10 , further comprising:

receiving, from the UE, information related to a time-domain density of the CSI-RS resources.