Multi-Port CSI Reference Signals for High-Rank MIMO Beam Selection
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Solution Overview
Problem
Existing beam management procedures in high rank multiple-input multiple-output (MIMO) systems, such as those supporting single user (SU) MIMO with ranks greater than two, often prioritize receive signal-to-noise ratio (SNR) over channel state information (CSI) acquisition, leading to suboptimal beam selection that adversely impacts communication reliability and throughput.
Innovation Solution
Implementing a multi-port CSI configuration with reference signal resource settings that include reference signal resources with more than two ports and associated measurement metrics, allowing for more informed beam selection by accounting for CSI during beam management, thereby facilitating accurate measurement and selection of beams that enhance communication reliability and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam management procedures prioritize receive signal-to-noise ratio (SNR) over channel state information (CSI) acquisition, then signal quality is improved, but beam selection accuracy deteriorates
Solution Approach 1:
The patent performs CSI acquisition and channel measurement before final beam selection, preparing channel state information in advance to inform the beam selection process. This preliminary action ensures that beam selection is based on accurate channel knowledge rather than solely on instantaneous SNR measurements, resolving the contradiction by prioritizing measurement accuracy before decision-making.
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports channel state information and measurement results back to the network entity. This feedback loop allows the system to continuously refine beam selection based on accurate channel knowledge, ensuring that beam selection accuracy is maintained while still achieving good signal quality through informed decisions.
2Measurement precision
If multi-port reference signal resources with more than two ports are configured, then beam selection accuracy is improved, but system complexity increases
Solution Approach 1:
The patent divides the reference signal resources into multiple port groups, where each port group contains reference signals for specific measurement purposes. This segmentation allows the system to handle complex multi-port configurations in a structured manner, managing the complexity by organizing resources into manageable segments while still achieving accurate beam selection through comprehensive measurements.
Solution Approach 2:
The patent designs the multi-port reference signal framework to serve multiple functions simultaneously: channel measurement, beam management, and CSI acquisition. By making the reference signal configuration universal and multi-functional, the system achieves accurate beam selection without proportionally increasing complexity, as the same infrastructure supports multiple objectives.
3Reliability
If channel state information (CSI) is considered in beam management, then communication reliability is improved, but processing overhead increases
Solution Approach 1:
The patent performs channel state information acquisition and measurement in advance during dedicated measurement periods, preparing CSI data before beam management decisions are required. This preliminary action reduces processing overhead during critical beam selection moments, as the heavy lifting of CSI acquisition is completed beforehand, allowing faster and more reliable beam management.
Solution Approach 2:
The patent implements continuous channel measurement and CSI acquisition processes that operate continuously or periodically, maintaining up-to-date channel state information without requiring intensive processing only during beam selection events. This continuous operation spreads the processing load over time, reducing peak overhead while ensuring reliable communication through current channel knowledge.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. Various aspects relate to a user equipment (UE) and a network entity that support one or more mechanisms associated with a multi-port channel state information (CSI) configuration for beam management. Some aspects more specifically relate to a reference signal resource setting indicating at least one reference signal resource set that includes at least one reference signal resource associated with more than two ports. To facilitate feedback from the UE associated with such a multi-port CSI configuration for beam management, some further aspects relate to a report quantity associated with a single reference signal resource indicator and multiple measurement metrics. A UE, in accordance with being configured with the reference signal resource setting and the report quantity, may perform one or more reference signal measurements and may feedback a report associated with the reference signal measurements.