AI-Based CSI Reporting Windows for Timely Wireless Feedback
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing wireless signal transmission and reception procedures.
Innovation Solution
Implementing an AI/ML-based method for reporting channel state information (CSI) by user equipment (UE), where CSI is obtained using an AI/ML model and transmitted through configured CSI reporting windows that can overlap or differ partially, allowing for differential CSI reporting and model updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If AI/ML model is used to predict CSI values for multiple time points, then the accuracy and timeliness of channel state information is improved, but the complexity of the reporting system increases
Solution Approach 1:
The patent divides the prediction window into multiple reporting windows, each with its own reporting instances. This segmentation allows the system to manage complex AI/ML predictions by breaking them into smaller, more manageable reporting units, reducing the overall system complexity while maintaining prediction accuracy across multiple time points.
Solution Approach 2:
The patent implements dynamic weighting mechanisms where different predicted CSI values are assigned different weights based on their timing and reliability. This dynamic approach allows the system to adaptively manage complexity by emphasizing more relevant predictions while still maintaining accurate channel state information through the weighted combination of multiple predictions.
2Speed
If multiple CSI reporting instances are configured within a reporting window, then the timeliness of CSI feedback is improved, but the signaling overhead increases
Solution Approach 1:
The patent combines multiple predicted CSI values from different reporting instances into a single weighted CSI report. By merging the information from multiple timing instances and applying appropriate weights, the system achieves timely CSI feedback without transmitting separate reports for each instance, thereby reducing signaling overhead while maintaining feedback timeliness.
Solution Approach 2:
The patent uses differential CSI reporting where subsequent CSI reports reference and differ from previous reports rather than transmitting complete information repeatedly. This copying approach reduces signaling overhead by transmitting only the differences or updates, while still providing timely CSI feedback through the sequence of referenced reports.
3Productivity
If differential CSI reporting is applied between reporting instances, then the signaling efficiency is improved, but the processing complexity at the receiver increases
Solution Approach 1:
The patent implements a feedback mechanism where the base station receives differential CSI reports and uses the weighting information and references to reconstruct the complete channel state information. This feedback approach improves signaling efficiency by transmitting compact differential data, while the receiver processing complexity is managed through systematic reconstruction algorithms that leverage the provided weights and references.
Data Source
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AI summary
A method by which a terminal reports CSI in a wireless communication system, according to at least one of the embodiments disclosed in the present specification, comprises: receiving configuration information regarding a CSI report; acquiring at least one piece of CSI on the basis of an AI/ML model; and on the basis of the configuration information, transmitting a CSI report on the at least one piece of CSI, wherein the at least one piece of CSI acquired on the basis of the AI/ML model comprises a plurality of CSI prediction values for a plurality of time points in a CSI prediction window set in the time domain, and from among the plurality of CSI prediction values, first CSI prediction values associated with a first CSI reporting window may be reported in the first CSI reporting window.