NR CSI Feedback Using Orthogonal RS for Low-Overhead Reporting
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Solution Overview
Problem
Existing CSI reporting schemes in wireless communication systems, particularly in NR systems, face challenges with redundant overhead due to increasing antenna numbers and lack of flexibility in reporting new channel information, leading to inefficiencies and incompatibilities with traditional CSI configurations.
Innovation Solution
A method for wireless communication that allows for flexible reporting of new channel information and traditional CSI by configuring orthogonal CSI reference resources in the frequency and time domains, and utilizing AI/ML for generating channel information and PMI, enabling efficient and timely feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional PMI feedback methods are used with increasing antenna numbers, then channel information can be reported, but redundant overhead increases significantly
Solution Approach 1:
The patent extracts and reports only the essential channel information parameters (first channel information and first PMI) separately from traditional CSI reporting. By taking out the critical components needed for AI/ML-based channel reconstruction and reporting them independently, the system achieves accurate channel state feedback while significantly reducing the redundant overhead associated with traditional comprehensive PMI feedback methods
Solution Approach 2:
The patent segments the CSI reporting into distinct parts: traditional CSI parameters and new channel information (first channel information and first PMI). This segmentation allows the system to report only the necessary components for AI/ML-based reconstruction, eliminating redundant data transmission while maintaining reporting accuracy for systems with increasing antenna numbers
2Reliability
If existing CSI configuration schemes are used, then traditional CSI can be reported, but flexibility for reporting new channel information is limited
Solution Approach 1:
The patent creates a universal reporting framework that can handle both traditional CSI parameters and new channel information formats through a unified first physical layer channel. This multi-functional approach allows the system to maintain compatibility with existing CSI configuration schemes while simultaneously supporting flexible reporting of new channel information generated by AI/ML algorithms, thereby achieving both reliability and adaptability
3Adaptability or versatility
If AI/ML-based channel information is reported, then reporting flexibility improves, but compatibility with traditional CSI configurations decreases
Solution Approach 1:
The patent introduces a first physical layer channel as an intermediary that bridges traditional CSI configuration schemes and new AI/ML-based channel information formats. This intermediary channel enables the transmission of both traditional CSI parameters and innovative channel information representations, allowing the system to maintain configuration compatibility while achieving enhanced reporting flexibility through AI/ML algorithms
Data Source
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AI summary
Disclosed are a method and apparatus for wireless communication. The method comprises: a first node receiving a first message, the first message being used for determining at least a first RS resource; and sending first channel information and a first PMI in a first physical layer channel. A measurement for the first RS resource is used for generating the first channel information and the first PMI, and the first channel information is used for determining a non-codebook channel matrix. The present application can ensure performance monitoring of channel information, avoid excessive air interface overhead, and achieve good compatibility.