Method for receiving reference signal resources in a wireless communication system and apparatus
A method for receiving a Channel State Information (CSI)-Reference Signal (RS) resource in a wireless communication system, the method performed by a User Equipment (UE) may include: receiving, from a base station, a configuration for a CSI-RS resource set including a plurality of CSI-RS resources; receiving the plurality of CSI-RS resources; and when a transmission via different transmission beams of the plurality of CSI-RS resources is configured, reporting a CSI-RS Resource Indicator (CRI) for the plurality of CSI-RS resources to the base station, when a transmission via a same transmission beam of the plurality of CSI-RS resources is configured, not reporting the CRI for the plurality of CSI-RS resources to the base station.
1. A method for performing a Channel State Information-Reference Signal (CSI-RS) based reporting in a wireless communication system, the method performed by a User Equipment (UE) and comprising:
receiving, from a base station, a configuration for a (i) first CSI-RS resource set that is based on a time unit and (ii) a second CSI-RS resource set that is based on a sub-time unit, wherein the time unit includes a plurality of sub-time units;
receiving a plurality of CSI-RS resources included in the second CSI-RS resource set; and
based on the plurality of CSI-RS resources being configured to be transmitted via different transmission beams, reporting a CSI-RS Resource Indicator (CRI) for the plurality of CSI-RS resources to the base station,
wherein, based on the plurality of CSI-RS resources being configured to be transmitted via the same transmission beam, the UE does not report any information including the CRI to the base station.
2. The method of claim 1 , wherein the first CSI-RS resource set is configured for reporting information related with a channel state, and
wherein the second CSI-RS resource set is configured for reporting information related with a beam management.
3. The method of claim 1 , further comprising:
based on the plurality of CSI-RS resources being configured to be transmitted via the same transmission beam: selecting a reception beam of the UE based on a measurement result for the plurality of CSI-RS resources.
4. The method of claim 3 , wherein selecting the reception beam of the UE comprises:
measuring the plurality of CSI-RS resources using different reception beams; and
selecting at least one reception beam among the different reception beams based on the measurement result.
5. The method of claim 3 , wherein the base station is a network node selecting at least one transmission beam among different transmission beams based on the CRI transmitted from the UE.
6. The method of claim 5 , wherein the reception beam and the transmission beam are jointly selected or sequentially selected according to a preconfigured order.
7. The method of claim 6 , wherein the preconfigured order is determined as an order from the transmission beam to the reception beam.
8. The method of claim 1 , wherein the configuration includes bitmap information for representing a location of the sub-time unit in the time unit.
9. A User Equipment (UE) configured to perform a Channel State Information-Reference Signal (CSI-RS) based reporting in a wireless communication system, the UE comprising:
a transceiver;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
receiving, from a base station through the transceiver, a configuration for (i) a first CSI-RS resource set that is based on a time unit and (ii) a second CSI-RS resource set that is based on a sub-time unit, wherein the time unit includes a plurality of sub-time units;
receiving a plurality of CSI-RS resources included in the second CSI-RS resource set; and
based on the plurality of CSI-RS resources being configured to be transmitted via different transmission beams, reporting a CSI-RS Resource Indicator (CRI) for the plurality of CSI-RS resources to the base station,
wherein, based on the plurality of CSI-RS resources being configured to be transmitted via the same transmission beam, the UE does not report any information including the CRI to the base station.
10. The UE of claim 9 , wherein the first CSI-RS resource set is configured for reporting information with a channel state, and
wherein the second CSI-RS resource set is configured for reporting information related with a beam management.
11. The UE of claim 9 , wherein the operations further comprise:
based on the plurality of CSI-RS resources being configured to be transmitted via the same transmission beam, selecting a reception beam of the UE based on a measurement result for the plurality of CSI-RS resources.
12. The UE of claim 11 , wherein the operations further comprise:
measuring the plurality of CSI-RS resources using different reception beams; and
selecting at least one reception beam among the different reception beams based on the measurement result.
13. The UE of claim 11 , wherein the base station is a network node selecting at least one transmission beam among different transmission beams based on the CRI transmitted from the UE.
14. The UE of claim 13 , wherein the reception beam and the transmission beam are jointly selected or sequentially selected according to a preconfigured order.
15. The UE of claim 14 , wherein the preconfigured order is determined as an order from the transmission beam to the reception beam.
16. The UE of claim 9 , wherein the configuration includes bitmap information for representing a location of the sub-time unit in the time unit.