Method for receiving reference signal in wireless communication system and apparatus therefor
Disclosed is a method for receiving a channel state information (CSI)-reference signal (RS) by a user equipment (UE) in a wireless communication system, which includes: receiving a CSI-RS associated with the SSB, in which the CSI-RS may be assumed to be quasi co-located (QCL) with the SSB.
1. A method for receiving a channel state information (CSI)-reference signal (RS) by a user equipment (UE) in a wireless communication system, the method comprising:
receiving Synchronization Signal/Physical Broadcast Channel blocks (SS/PBCH blocks) based on a plurality of SSB indexes;
receiving CSI-RS configuration information that includes i) information for one or more CSI-RS resources and ii) QCL information for each of the one or more CSI-RS resources; and
receiving a CSI-RS based on a quasi co-location (QCL) relationship with respect to a spatial reception parameter,
wherein the QCL relationship is configured between i) a CSI-RS port of a CSI-RS resource related to the CSI-RS among the one or more CSI-RS resources and ii) an SS/PBCH block, and
wherein an SSB index of the SS/PBCH block is indicated by the QCL information for the CSI-RS resource related to the CSI-RS among the plurality of SSB indexes.
2. The method of claim 1 , wherein the SS/PBCH block includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH).
3. The method of claim 1 , wherein the CSI-RS configuration information is received through radio resource control (RRC) signaling.
4. The method of claim 1 , wherein the QCL information includes a QCL type for a QCL parameter set related to the QCL relationship.
5. The method of claim 4 , wherein the QCL type is defined to indicate different QCL parameter sets for each QCL type.
6. The method of claim 5 , wherein the QCL parameter set includes at least one of a delay spread, a Doppler spread, a Doppler shift, an average delay or the spatial reception parameter.
7. The method of claim 1 , wherein the spatial reception parameter includes at least one of a reception beam direction parameter or a reception beam width related parameter.
8. The method of claim 1 , wherein the CSI-RS is based on a periodic CSI-RS.
9. A user equipment (UE) for receiving a channel state information (CSI)-reference signal (RS) in a wireless communication system, the UE comprising:
a radio frequency (RF) unit transmitting and receiving a radio signal; and
a processor controlling the RF unit,
wherein the processor is configured to:
receive Synchronization Signal/Physical Broadcast Channel blocks (SS/PBCH blocks) based on a plurality of SSB indexes;
receive CSI-RS configuration information that includes i) information for one or more CSI-RS resources and ii) QCL information for each of the one or more CSI-RS resources; and
receive a CSI-RS based on a quasi co-location (QCL) relationship with respect to a spatial reception parameter,
wherein the QCL relationship is configured between i) a CSI-RS port of a CSI-RS resource related to the CSI-RS among the one or more CSI-RS resources and ii) an SS/PBCH block, and
wherein an SSB index of the SS/PBCH block is indicated by the QCL information for the CSI-RS resource related to the CSI-RS among the plurality of SSB indexes.
10. The UE of claim 9 , wherein the SS/PBCH block includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH).
11. The UE of claim 9 , wherein the CSI-RS configuration information is transmitted through radio resource control (RRC) signaling.
12. The UE of claim 9 , wherein the QCL information includes a QCL type for a QCL parameter set related to the QCL relationship.
13. The UE of claim 12 , wherein the QCL type is defined to indicate different QCL parameter sets for each QCL type.
14. The UE of claim 13 , wherein the QCL parameter set includes at least one of a delay spread, a Doppler spread, a Doppler shift, an average delay or the spatial reception parameter.
15. The UE of claim 9 , wherein the spatial reception parameter includes at least one of a reception beam direction parameter or a reception beam width related parameter.
16. The UE of claim 9 , wherein the CSI-RS is based on a periodic CSI-RS.
17. A base station for transmitting a channel state information (CSI)-reference signal (RS) in a wireless communication system, the base station comprising:
a radio frequency (RF) unit transmitting and receiving a radio signal; and
a processor controlling the RF unit,
wherein the processor is configured to:
transmit Synchronization Signal/Physical Broadcast Channel blocks (SS/PBCH blocks) based on a plurality of SSB indexes,
transmit CSI-RS configuration information that includes i) information for one or more CSI-RS resources and ii) QCL information for each of the one or more CSI-RS resources,
transmit a CSI-RS based on a quasi co-location (QCL) relationship with respect to a spatial reception parameter,
wherein the QCL relationship is configured between i) a CSI-RS port of a CSI-RS resource related to the CSI-RS among the one or more CSI-RS resources and ii) an SS/PBCH block, and
wherein an SSB index of the SS/PBCH block is indicated by the QCL information for the CSI-RS resource related to the CSI-RS among the plurality of SSB indexes.