Multi-TRP CSI Reporting With Frequency-Selective Beam Management
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing beamforming and channel state information reporting in multi-TRP environments, particularly in high-frequency bands like mmWave and THz, due to hardware constraints and high propagation loss.
Innovation Solution
Implementing frequency-selective beam management using joint phase-time array (JPTA) systems with hybrid beamforming architectures, which allow for simultaneous transmission and reception of beams over frequency subbands, and specifying customized measurement and reporting configurations for multi-TRP communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fully digital transceiver implementations are used, then beamforming gain and communication performance are improved, but hardware cost and power consumption increase significantly
Solution Approach 1:
The patent segments the beamforming function into two parts: digital beamforming for wideband signals and analog beamforming for frequency-selective narrowband signals. This segmentation allows the system to use less power-intensive analog phase shifters for frequency-specific beam management while retaining digital processing for overall signal handling, thereby reducing total power consumption while maintaining beamforming gain.
Solution Approach 2:
The patent changes the operating parameters by introducing frequency-selective beamforming where different beamforming approaches are applied to different frequency subbands. By adapting the beamforming method to the specific frequency characteristics, the system achieves effective beamforming gain only where needed, reducing unnecessary power consumption in fully digital implementations.
2Reliability
If fully digital transceiver implementations are used, then communication performance is improved, but hardware cost increases
Solution Approach 1:
The patent divides the transceiver architecture into hybrid digital-analog components, where digital processing handles broad communication functions and analog phase shifters handle frequency-selective beamforming. This segmentation reduces the number of expensive digital-to-analog converters and RF chains needed, lowering hardware cost while preserving essential communication performance.
Solution Approach 2:
The patent modifies the system parameters by implementing frequency-selective beamforming that adapts beamforming resources to specific frequency subbands. This parameter adaptation allows the system to achieve necessary communication performance with fewer hardware resources, thereby reducing manufacturing cost.
3Measurement precision
If frequency selective beam management is implemented, then beam reporting accuracy is improved, but measurement and configuration complexity increases
Solution Approach 1:
The patent segments the frequency spectrum into multiple subbands and applies separate beamforming measurements to each subband. This segmentation improves beam reporting accuracy by capturing frequency-selective channel characteristics, while the structured segmentation approach actually simplifies measurement complexity compared to attempting wideband measurements across the entire spectrum.
Solution Approach 2:
The patent applies local quality by performing beam measurements and reporting specific to each frequency subband rather than using a uniform wideband approach. This local measurement strategy improves accuracy for frequency-selective scenarios while managing complexity through localized, manageable measurement units.
Data Source
AI summary
Methods and apparatuses for measurement configurations for reporting in multi-transmit-receive point (TRP) communication systems. A method for operating a user equipment (UE) includes receiving first information for a first set of frequency subbands for FSBM and receiving second information related to a CSI resource setting. The CSI resource setting includes a first CSI resource set and a second CSI resource set. The method further includes identifying, based on the first and second information, a first subset of frequency subbands from the first set of frequency subbands for the first CSI resource set and a second subset of frequency subbands from the first set of frequency subbands for the second CSI resource set. The method further includes determining, based on the identification, one or more first RS resources from the first CSI resource set and one or more second RS resources from the second CSI resource set for FSBR.