Event-Triggered CSI Reporting for 5G NR
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Solution Overview
Problem
Current CSI reporting modes in 5G NR cellular communications networks face inefficiencies due to high periodicity requirements, leading to resource consumption and reduced throughput, while aperiodic reporting may not maintain accurate channel conditions and incurs higher downlink overhead.
Innovation Solution
An event-triggered CSI reporting mode where the UE sends reports in response to specific changes in transmission reception points (TRPs) based on measurements, eliminating the need for periodic triggers and allowing the network to focus on significant changes in channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If periodic CSI reporting is used to maintain accurate channel conditions, then channel state accuracy is improved, but resource consumption increases and throughput decreases
Solution Approach 1:
The patent implements event-triggered periodic reporting where the UE sends CSI reports periodically only when specific events occur (such as channel quality changes exceeding a threshold, TRP selection changes, or beam changes). This eliminates continuous periodic reporting while maintaining channel state accuracy when needed, thereby reducing resource consumption and increasing throughput without sacrificing measurement precision.
2Use of energy by moving object
If aperiodic CSI reporting is used to reduce resource consumption, then resource efficiency is improved, but downlink overhead increases and channel condition accuracy deteriorates
Solution Approach 1:
The patent employs event-triggered feedback mechanisms where the UE continuously monitors channel conditions and sends CSI reports when predefined events occur (such as channel quality degradation below a threshold, TRP selection changes, or beam failures). This feedback approach maintains channel condition accuracy by reporting only when changes are significant, reducing unnecessary reporting overhead while ensuring the network has up-to-date channel information when needed.
3Measurement precision
If high periodicity CSI reporting is implemented to track channel changes, then channel tracking accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent implements event-triggered periodic reporting where the UE sends CSI reports periodically only when specific events occur (such as channel quality changes exceeding a threshold, TRP selection changes, or beam changes). This eliminates continuous periodic reporting while maintaining channel state accuracy when needed, thereby reducing resource consumption and increasing throughput without sacrificing measurement precision.
4Productivity
If frequent CSI reporting is used to maintain scheduling efficiency, then data scheduling performance is improved, but reporting overhead increases
Solution Approach 1:
The patent employs event-triggered feedback mechanisms where the UE continuously monitors channel conditions and sends CSI reports when predefined events occur (such as channel quality degradation below a threshold, TRP selection changes, or beam failures). This feedback approach maintains channel condition accuracy by reporting only when changes are significant, reducing unnecessary reporting overhead while ensuring the network has up-to-date channel information when needed for efficient scheduling.
Data Source
AI summary
This specification describes a method comprising: receiving, at a user equipment, UE, and from a node of a cellular communications network, configuration information relating to an event-triggered channel state information, CSI, reporting mode. The method further comprises the UE, while operating in the event-triggered CSI reporting mode in accordance with the configuration information, responding to an occurrence of a pre-defined event by providing report information to the cellular communications network, wherein i) the pre-defined event is related to a change in a selection associated with a set of transmission reception points, TRPs, ii) the selection is performed by the UE based on measurements of one or more reference signals, and iii) the report information relates to the change in the selection associated with the set of TRPs.