Aperiodic CSI Reporting via DCI Triggering in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in reporting aperiodic Channel Status Information (CSI) due to the lack of optimized methods for processing and updating CSI reports, particularly in scenarios where the number of reports exceeds a predetermined threshold, leading to increased computational complexity and resource utilization.
Innovation Solution
A method and device for a user equipment (UE) to receive a CSI report-triggering message via downlink control information (DCI), which includes information about CSI processes and aperiodic reference signals, allowing the UE to update and report aperiodic CSI efficiently by selecting and prioritizing CSI reports based on available resources and computational capacity, thereby managing the number of reports within a threshold value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE updates and reports all aperiodic CSI reports when triggered, then the channel state information accuracy is improved, but the computational complexity and resource utilization increase beyond acceptable thresholds
Solution Approach 1:
The patent applies partial action by updating and reporting only a subset of CSI reports (those with lower indices) when the total number of triggered reports exceeds a threshold. Instead of processing all CSI reports, the UE selectively processes only the necessary portion (first N reports), thereby reducing computational complexity while maintaining sufficient channel state information accuracy for system operation.
2Loss of information
If the UE processes multiple aperiodic CSI reports simultaneously, then the reporting completeness is improved, but the processing time and resource utilization exceed available capacity
Solution Approach 1:
The patent extracts and processes only the essential CSI reports (those with indices less than N) from the set of all triggered reports. By taking out only the necessary subset for processing while leaving others unprocessed, the system maintains acceptable reporting completeness without exceeding processing time and resource capacity constraints.
3Productivity
If the UE prioritizes CSI reports with lower indices, then the processing efficiency is improved, but the information from higher index reports may be lost
Solution Approach 1:
The patent changes the parameter of report selection by using index comparison (index < N) as the selection criterion. This parameter-based selection method enables efficient prioritization of lower-index reports while maintaining a clear, implementable rule that balances processing efficiency with information retention, where N is determined based on UE capability and system requirements.
Data Source
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AI summary
The present disclosure provides a method for reporting, by a user equipment (UE), aperiodic channel status information (CSI) to a base station in a wireless communication system, the method comprising: receiving, from the base station, a CSI report-triggering message via downlink control information (DCI), wherein the CSI report-triggering message include information about at least one CSI process among a plurality of CSI processes, and about an aperiodic reference signal among a plurality of aperiodic reference signal resources included in the at least one CSI process; and updating the aperiodic CSI for the at least one CSI process based on the aperiodic reference signal resource and reporting the updated aperiodic CSI to the base station.