Threshold-Based CSI Reporting for RedCap Terminal Energy Savings
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Solution Overview
Problem
In wireless communication systems, terminals report channel state information (CSI) even when the channel state is static, leading to unnecessary resource and energy overhead due to periodic, semi-persistent, and non-periodic reporting methods, particularly affecting reduced capability user equipment (Redcap UE) like factory sensors and video surveillance equipment.
Innovation Solution
A method for reporting CSI that includes determining a configuration parameter with a threshold value for terminals to report CSI measurement information only when significant changes in channel state are detected, using PUCCH and PUSCH resources efficiently, and optimizing reporting based on terminal type and service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals report CSI measurement information periodically or semi-persistently, then the network can maintain real-time channel state awareness, but resource overhead and energy consumption increase significantly
Solution Approach 1:
The patent implements dynamic CSI reporting by allowing terminals to adjust reporting frequency based on channel state changes. When channel conditions change significantly, terminals increase reporting frequency; when stable, they reduce or suspend reporting. This dynamic adaptation resolves the contradiction between maintaining real-time channel awareness and reducing energy consumption.
Solution Approach 2:
The patent changes the reporting parameter from fixed periodic intervals to variable intervals based on threshold comparisons. Terminals compare current CSI with historical values and only report when the difference exceeds a threshold, transforming the reporting mechanism from time-driven to event-driven, thereby reducing unnecessary reports while maintaining reliability.
2Productivity
If terminals report CSI measurement information frequently, then the network can optimize resource allocation in real-time, but unnecessary resource overhead increases
Solution Approach 1:
The patent extracts only the necessary CSI reporting instances by filtering out redundant reports. Terminals evaluate whether channel state changes exceed a threshold before reporting, extracting only meaningful updates rather than reporting all measurements. This reduces resource overhead while maintaining the productivity benefit of real-time optimization.
Solution Approach 2:
Instead of reporting all CSI measurements (excessive action), the patent applies partial action by reporting only when changes exceed a significant threshold. This selective reporting provides sufficient information for resource allocation optimization without the overhead of complete continuous reporting.
3Reliability
If reduced capability user equipment (Redcap UE) reports CSI continuously, then communication reliability is maintained, but energy consumption becomes unsustainable
Solution Approach 1:
The patent transforms continuous periodic reporting into conditional periodic reporting. Redcap UEs report CSI at periodic intervals only when channel state changes exceed the threshold, suspending reports during stable periods. This maintains communication reliability during changes while dramatically reducing energy consumption during stable periods for battery-constrained devices.
Data Source
AI summary
A method for reporting channel state information includes: determining a first configuration parameter, in which the first configuration parameter indicates a parameter for a first type of terminal to report CSI measurement information, and the first configuration parameter at least includes a CSI measurement information reporting threshold value; and reporting the CSI measurement information based on the CSI measurement information reporting threshold value.