Apparatus and methods of simultaneous user equipment (UE) receive (RX) beam refinement
Apparatus and methods of enhanced CSI-RS resource configuration and transmission for simultaneous UE Rx beam refinement are disclosed. The apparatus includes: a receiver that receives Channel State Information Reference Signal (CSI-RS) configuration comprising one or more CSI-RS resource sets for Receive (Rx) beam refinement, the CSI-RS resource sets comprising a plurality of CSI-RS resources for transmission of a plurality of CSI-RSs that are Frequency-Division Multiplexed (FDMed), wherein the receiver further receives, simultaneously, the CSI-RSs based on one or more Quasi Co-Location (QCL) assumptions; a processor that performs a simultaneous Rx beam refinement corresponding to the CSI-RSs that are FDMed; and a transmitter that transmits a reporting according to a Channel State Information (CSI) reporting configuration.
1. An apparatus, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the apparatus to:
receive a Channel State Information Reference Signal (CSI-RS) configuration comprising one or more CSI-RS resource sets for Receive (Rx) beam refinement, the CSI-RS resource sets comprising a plurality of CSI-RS resources for transmission of a plurality of CSI-RSs that are Frequency-Division Multiplexed (FDMed), wherein the at least one processor further receives, simultaneously, the CSI-RSs based on one or more Quasi Co-Location (QCL) assumptions;
perform a simultaneous Rx beam refinement corresponding to the CSI-RSs that are FDMed; and
transmit a reporting according to a Channel State Information (CSI) reporting configuration.
2. The apparatus of claim 1 , wherein the CSI-RS configuration comprises one CSI-RS resource set, and the CSI-RS resource set comprises a plurality of CSI-RS resource groups, each group comprising a plurality of CSI-RS resources for transmission of a plurality of CSI-RSs that are FDMed.
3. The apparatus of claim 2 , wherein the CSI-RS configuration further comprises a ‘repetition’ parameter set to ‘partial on’, indicating a same Transmitter (Tx) beam to be assumed for CSI-RSs with a same index in each CSI-RS resource group.
4. The apparatus of claim 1 , wherein the CSI-RS configuration comprises one CSI-RS resource set, and each CSI-RS resource in the CSI-RS source set is configured with a plurality of QCL assumptions associated with a plurality of CSI-RS port groups, wherein each QCL assumption is associated with a CSI-RS port group.
5. The apparatus of claim 4 , wherein each one of the CSI-RS port groups comprises one or two CSI-RS ports.
6. The apparatus of claim 4 , wherein, in each CSI-RS resource, the CSI-RSs in the plurality of CSI-RS port groups are FDMed and transmitted simultaneously with different Tx beams.
7. The apparatus of claim 1 , wherein the CSI-RS configuration comprises a plurality of CSI-RS resource sets, and it is not expected that the CSI-RS resources with a same index in each CSI-RS resource set are configured with different slots and Orthogonal Frequency Division Multiplexing (OFDM) symbols.
8. The apparatus of claim 1 , wherein the CSI-RS configuration comprises a plurality of CSI-RS resource sets, and partial triggering of CSI-RSs on the plurality of CSI-RS resource sets is not expected.
9. The apparatus of claim 1 , wherein the reporting comprises a CSI-RS resource group related index and corresponding Layer 1 Reference Signal Received Power (L1-RSRP) or Layer 1 Signal-to-Interference-Plus-Noise Ratio (L1-SINR); and the CSI-RS resource group related index comprises CSI-RS resource set index, or CSI-RS resource setting index, or CSI-RS port group index, or CSI-RS index in a group.
10. The apparatus of claim 1 , wherein the reporting comprises L1-RSRP or L1-SINR concatenated according to a corresponding order of: CSI-RS resource set IDs, or CSI-RS port group indexes, or CSI-RS index in a group.
11. An apparatus, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the apparatus to:
transmit a Channel State Information Reference Signal (CSI-RS) configuration comprising one or more CSI-RS resource sets for Receive (Rx) beam refinement,
wherein the CSI-RS configuration comprises one CSI-RS resource set, and each CSI-RS resource in the CSI-RS source set is configured with a plurality of QCL assumptions associated with a plurality of CSI-RS port groups, wherein each QCL assumption is associated with a CSI-RS port group, and
wherein the CSI-RS resource sets comprising a plurality of CSI-RS resources for transmission of a plurality of CSI-RSs that are Frequency-Division Multiplexed (FDMed),
transmit, simultaneously, the CSI-RSs based on one or more Quasi Co-Location (QCL) assumptions; and
receive a reporting according to a Channel State Information (CSI) reporting configuration.
12. The apparatus of claim 11 , wherein the CSI-RS resource set comprises a plurality of CSI-RS resource groups, each group comprising a plurality of CSI-RS resources for transmission of a plurality of CSI-RSs that are FDMed.
13. The apparatus of claim 12 , wherein the CSI-RS configuration further comprises a ‘repetition’ parameter set to ‘partial on’, indicating a same Transmitter (Tx) beam to be assumed for CSI-RSs with a same index in each CSI-RS resource group.
14. The apparatus of claim 11 , wherein the CSI-RS configuration comprises a plurality of CSI-RS resource sets, and it is not expected that the CSI-RS resources with a same index in each CSI-RS resource set are configured with different slots and Orthogonal Frequency Division Multiplexing (OFDM) symbols.
15. The apparatus of claim 11 , wherein the CSI-RS configuration comprises a plurality of CSI-RS resource sets, and partial triggering of CSI-RSs on the plurality of CSI-RS resource sets is not expected.
16. The apparatus of claim 11 , wherein the reporting comprises a CSI-RS resource group related index and corresponding Layer 1 Reference Signal Received Power (L1-RSRP) or Layer 1 Signal-to-Interference-Plus-Noise Ratio (L1-SINR); and the CSI-RS resource group related index comprises CSI-RS resource set index, or CSI-RS resource setting index, or CSI-RS port group index, or CSI-RS index in a group.
17. The apparatus of claim 11 , wherein the reporting comprises L1-RSRP or L1-SINR concatenated according to a corresponding order of: CSI-RS resource set IDs, or CSI-RS port group indexes, or CSI-RS index in a group.
18. A method, comprising:
receiving, by a receiver, Channel State Information Reference Signal (CSI-RS) configuration comprising one or more CSI-RS resource sets for Receive (Rx) beam refinement, the CSI-RS resource sets comprising a plurality of CSI-RS resources for transmission of a plurality of CSI-RSs that are Frequency-Division Multiplexed (FDMed);
receiving, by the receiver, simultaneously, the CSI-RSs based on one or more Quasi Co-Location (QCL) assumptions;
performing, by a processor, a simultaneous Rx beam refinement corresponding to the CSI-RSs that are FDMed; and
transmitting, by a transmitter, a reporting according to a Channel State Information (CSI) reporting configuration.