Method for receiving reference signal in wireless communication system and apparatus therefor
A method for receiving a Reference Signal (RS) performed by a User Equipment (UE) in a wireless communication system according to an embodiment of the present invention may include receiving a first RS through a first antenna port; and receiving a second RS through a second antenna port which is Quasi Co-Located (QCL)-assumed with the first antenna port, the first and second antenna ports may be QCL-assumed for at least one QCL parameter, and the at least one QCL parameter may include a reception beam related parameter.
1. A method of receiving a Reference Signal (RS) by a User Equipment (UE) in a wireless communication system, the method comprising:
receiving Quasi Co-Location (QCL) configuration information through a Radio Resource Control (RRC) signaling, wherein the QCL configuration information includes information for a plurality of QCL configuration parameter sets;
receiving the first RS through a first antenna port; and
receiving the second RS through a second antenna port based on a QCL relationship between the first antenna port and the second antenna port,
wherein the QCL relationship is based on a specific QCL configuration parameter set among the plurality of QCL configuration parameter sets,
wherein the specific QCL configuration parameter set includes a spatial reception parameter which is related to a spatial property of a signal received by the UE,
wherein, based on that the first RS is transmitted based on one or more first resources and based on that the second RS is transmitted based on one or more second resources:
(i) the specific QCL configuration parameter set is configured for each of the one or more second resources, and
(ii) based on the second RS being related to a specific second resource among the one or more second resources, the specific QCL configuration parameter set configured for the specific second resource is related to a specific first resource among the one or more first resources.
2. The method of claim 1 , wherein the first RS is based on a CSI-RS and the second RS is based on a Synchronization Signal (SS), and
wherein the CSI-RS and the SS are configured to have the QCL relationship based on the spatial reception-parameter.
3. The method of claim 1 ,
wherein the one or more first resources is based on one or more first CSI-RS resources and the one or more second resources is based on one or more second CSI-RS resources.
4. The method of claim 1 ,
wherein candidate QCL configuration parameter sets are determined among the plurality of QCL configuration parameter sets through an L2 (Layer 2)/MAC (medium access control) layer signaling, and
wherein the specific QCL configuration parameter set is determined among the candidate QCL configuration parameter sets through an L1 (Layer 1)/PHY (Physical) layer signaling.
5. The method of claim 1 , wherein the QCL relationship is based on at least one of the spatial reception parameter, a Delay spread parameter, a Doppler spread parameter, a Doppler shift parameter or an Average delay parameter.
6. A User Equipment (UE) configured to receive a Reference Signal (RS) in a wireless communication system, the UE comprising:
a radio frequency (RF) unit;
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 to perform operations comprising:
receiving Quasi Co-Location (QCL) configuration information through a Radio Resource Control (RRC) signaling, wherein the QCL configuration information includes information for a plurality of QCL configuration parameter sets;
receiving the first RS through a first antenna port; and
receiving the second RS through a second antenna port based on a QCL relationship between the first antenna port and the second antenna port,
wherein the QCL relationship is based on a specific QCL configuration parameter set among the plurality of QCL configuration parameter sets,
wherein the specific QCL configuration parameter set includes a spatial reception parameter which is related to a spatial property of a signal received by the UE,
wherein, based on that the first RS is transmitted based on one or more first resources and based on that the second RS is transmitted based on one or more second resources:
(i) the specific QCL configuration parameter set is configured for each of the one or more second resources, and
(ii) based on the second RS being related to a specific second resource among the one or more second resources, the specific QCL configuration parameter set configured for the specific second resource is related to a specific first resource among the one or more first resources.
7. The UE of claim 6 , wherein the first RS is based on a CSI-RS and the second RS is based on a Synchronization Signal (SS), and
wherein the CSI-RS and the SS are configured to have the QCL relationship based on the spatial reception-parameter.
8. The UE of claim 6 ,
wherein the one or more first resources is based on one or more first CSI-RS resources and the one or more second resources is based on one or more second CSI-RS resources.
9. The UE of claim 6 ,
wherein candidate QCL configuration parameter sets are determined among the plurality of QCL configuration parameter sets through an L2 (Layer 2)/MAC (medium access control) layer signaling, and
wherein the specific QCL configuration parameter set is determined among the candidate QCL configuration parameter sets through an L1 (Layer 1)/PHY (Physical) layer signaling.
10. The UE of claim 6 , wherein the QCL relationship is based on at least one of the spatial reception parameter, a Delay spread parameter, a Doppler spread parameter, a Doppler shift parameter or an Average delay parameter.