Method for reporting channel state information in wireless communication system and apparatus for same
A method for a terminal reporting channel state information (CSI) in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving, from a base station, channel state information-reference signal (CSI-RS) setting information for receiving a CSI-RS resource; receiving the CSI-RS resource on the basis of the CSI-RS resource setting information; and reporting CSI generated on the basis of the CSI-RS resource to the base station, wherein when the same CSI-RS resource is set for repeated transmission for the terminal, the CSI-RS resource setting information may include indicating information relating to the location of a subcarrier on which the same CSI-RS resource is mapped.
1. A method for performing, by a user equipment (UE), a beam-related reporting in a wireless communication system, the method comprising:
receiving, from a base station, resource setting information,
wherein the resource setting information includes a plurality of resource configurations for a plurality of channel state information-reference signal (CSI-RS) resources, with each resource configuration corresponding to each CSI-RS resource,
wherein the plurality of CSI-RS resources comprise (i) a non-zero power CSI-RS resource, (ii) a zero power CSI-RS resource, and (iii) a non-zero power CSI-RS resource for interference,
wherein based on the plurality of CSI-RS resources being configured for a beam management, each of the plurality of resource configurations includes indication information for a subcarrier location of each CSI-RS resource, and
wherein a resource configuration corresponding to the non-zero power CSI-RS resource for interference includes an indicator indicating that the non-zero power CSI-RS resource for interference is related to interference cancellation;
receiving, from the base station, the plurality of CSI-RS resources based on the resource setting information,
wherein the plurality of CSI-RS resources are repeatedly received via different reception (RX) beam candidates of the UE; and
transmitting, to the base station, a beam-related report generated based on the plurality of CSI-RS resources.
2. The method of claim 1 ,
wherein the indication information comprises (i) offset information of a first subcarrier to which each CSI-RS resource is mapped and (ii) subcarrier spacing information to which each CSI-RS resource is mapped.
3. The method of claim 2 ,
wherein the offset information is configured differently for each CSI-RS resource.
4. The method of claim 3 ,
wherein the subcarrier spacing information is configured based on a maximum number of the RX beam candidates.
5. The method of claim 2 ,
wherein the plurality of CSI-RS resources are received repeatedly within specific time duration.
6. The method of claim 5 ,
wherein the specific time duration is one orthogonal frequency division multiple (OFDM) symbol duration.
7. The method of claim 6 , further comprising:
selecting at least one RX beam among the different RX beam candidates based on the reception result.
8. The method of claim 7 , further comprising:
transmitting, to the base station, capability information including information for a maximum number of the different RX beam candidates.
9. The method of claim 8 ,
wherein a number of times that the plurality of CSI-RS resources are received repeatedly within the specific time duration is determined based on the maximum number of the different RX beam candidates.
10. The method of claim 2 ,
wherein a number of times that the plurality of CSI-RS resources are repeated within one orthogonal frequency division multiple (OFDM) symbol is determined based on the subcarrier spacing information.
11. The method of claim 1 ,
wherein the non-zero power CSI-RS resource for interference is a CSI-RS resource configured for a different UE.
12. A user equipment (UE) configured to perform a beam-related reporting in a wireless communication system, the UE comprising:
a radio frequency (RF) transceiver; and
a processor controlling the RF transceiver,
wherein the processor is configured to:
receive, from a base station via the RF transceiver, resource setting information;
wherein the resource setting information includes a plurality of resource configurations for a plurality of channel state information-reference signal (CSI-RS) resources, with each resource configuration corresponding to each CSI-RS resource,
wherein the plurality of CSI-RS resources comprise (i) a non-zero power CSI-RS resource, (ii) a zero power CSI-RS resource, and (iii) a non-zero power CSI-RS resource for interference,
wherein based on the plurality of CSI-RS resources being configured for a beam management, each of the plurality of resource configurations includes indication information for a subcarrier location of each CSI-RS resource, and
wherein a resource configuration corresponding to the non-zero power CSI-RS resource for interference includes an indicator indicating that the non-zero power CSI-RS resource for interference is related to interference cancellation; and
receive, from a base station via the RF transceiver, the plurality of CSI-RS resources based on the resource setting information,
wherein the plurality of CSI-RS resources are repeatedly received via different reception (RX) beam candidates of the UE; and
transmit, to the base station via the RF transceiver, a beam-related report generated based on the plurality of CSI-RS resources.
13. The UE of claim 12 ,
wherein the plurality of CSI-RS resources are received repeatedly within specific time duration.
14. The UE of claim 12 ,
wherein the indication information comprises (i) offset information of a first subcarrier to which each CSI-RS resource is mapped and (ii) subcarrier spacing information to which each CSI-RS resource is mapped.
15. The UE of claim 14 ,
wherein the offset information is configured differently for each CSI-RS resource.