Aperiodic CSI Reporting Configuration for Wireless Terminals
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently reporting channel state information (CSI) in multi-node coordinated communication systems, particularly in managing the number of CSI reports and configuring CSI request bits effectively across different component carriers and subframes.
Innovation Solution
A method for performing aperiodic CSI reporting, where the number of CSI reports and bits indicating the CSI report request can be configured independently per CSI aperiodic report set, with options to include more reports in certain configurations and adjust based on the number of component carriers or CSI processes, allowing for flexible reporting across uplink and downlink subframes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of CSI reports is increased to improve channel state feedback accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent segments CSI reporting into multiple independent CSI report sets, where each set can be independently configured and triggered. This allows the system to divide the overall CSI feedback task into manageable subsets, improving feedback accuracy for specific scenarios without overwhelming the device with a single complex reporting structure.
Solution Approach 2:
The patent introduces dynamic configuration where the number of CSI reports and their parameters can be adjusted based on communication conditions, component carrier configurations, and CSI process states. This dynamic approach enables the system to optimize feedback accuracy while adapting complexity to actual needs rather than maintaining fixed high complexity.
2Adaptability or versatility
If independent configuration per CSI aperiodic report set is implemented to improve adaptability, then adaptability is improved, but device complexity increases
Solution Approach 1:
By segmenting CSI reporting into multiple independently configurable report sets, the patent enables targeted adaptation for different component carriers and CSI processes. Each report set can be customized for specific scenarios without requiring complex global reconfiguration, thus improving adaptability while managing complexity through modular design.
Solution Approach 2:
The patent applies local quality by allowing different configuration parameters (such as reporting quantities, periodicities, and triggers) to be optimized for each specific CSI report set based on local requirements. This enables tailored configurations for different component carriers or CSI processes without imposing uniform complexity across the entire system.
3Measurement precision
If more CSI reports are included in certain configurations to improve channel state information coverage, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent implements periodic triggering mechanisms for CSI aperiodic report sets, where reports are transmitted at optimized intervals based on channel conditions and configuration. This periodic structure ensures comprehensive channel state coverage over time while preventing excessive reporting that would waste time, by aligning report transmission with actual channel variation patterns.
Solution Approach 2:
The patent applies partial action by configuring different numbers of CSI reports for different report sets based on specific needs. Not all report sets require the same number of reports - some configurations use fewer reports when channel conditions are stable or when only partial feedback is needed, thus achieving adequate coverage without excessive time consumption.
Data Source
AI summary
A method by which a terminal reports an aperiodic channel state in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving an aperiodic channel state information (CSI) report request from a base station; and calculating the aperiodic CSI with respect to a CSI to be measured, which is indicated by the aperiodic CSI report request so as to transmit the calculated aperiodic CSI to the base station, wherein the aperiodic CSI report request indicates a report for one of a plurality of aperiodic CSI report sets, and the number of individual CSI reports included in each of the plurality of aperiodic CSI report sets can be independently set according to each aperiodic CSI report set.