# US 12,184,382 B2 · Apparatus and methods of simultaneous user equipment (UE) receive (RX) beam refinement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,184,382 B2 - Document ID: US12184382B2 - Status: Granted - Kind: B2 - Application number: 18/040,672 - Filed: 2020-08-06 - Published: 2023-11-16 - Granted: 2024-12-31 - Earliest claimed: 2020-08-06 - Assignees: Lenovo (Beijing) Limited - Applicants: Lenovo (Beijing) Limited - Inventors: Yi Zhang; Chenxi Zhu; Bingchao Liu; Wei Ling - Web page: https://patentgrep.com/patent/US12184382B2 ## CPC - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04B 7/088: {using beam selection} - H04L 5/0023: {Time-frequency-space} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 25/0226: {sounding signals per se} - H04L 1/0026: {Transmission of channel quality indication} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION ## Abstract 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. ## Claims ### Claim 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. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 2) 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. ### Claim 4 (depends on 1) 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. ### Claim 5 (depends on 4) The apparatus of claim 4, wherein each one of the CSI-RS port groups comprises one or two CSI-RS ports. ### Claim 6 (depends on 4) 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. ### Claim 7 (depends on 1) 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. ### Claim 8 (depends on 1) 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. ### Claim 9 (depends on 1) 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. ### Claim 10 (depends on 1) 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. ### Claim 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. ### Claim 12 (depends on 11) 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. ### Claim 13 (depends on 12) 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. ### Claim 14 (depends on 11) 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. ### Claim 15 (depends on 11) 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. ### Claim 16 (depends on 11) 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. ### Claim 17 (depends on 11) 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. ### Claim 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.