CSI Interference Fluctuation Feedback for Lower UE Reporting Load
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Solution Overview
Problem
In 5G NR wireless communications, frequent CSI reports to gNBs for interference and noise measurements are burdensome on user equipment (UE) due to increased monitoring and power consumption, while existing CSI reports include unnecessary channel measurements that do not effectively address interference fluctuations.
Innovation Solution
A new CSI report format is defined for UE, focusing solely on interference and noise measurements, with normalized values and statistical modeling to reduce the reporting burden, allowing gNBs to determine optimal modulation and coding schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frequent CSI reports are sent for interference and noise measurements, then the gNB can make more accurate MCS selections, but the UE experiences increased monitoring burden and power consumption
Solution Approach 1:
The patent extracts only the interference and noise measurement components from the traditional CSI report, creating a simplified report format that excludes channel measurements. This selective extraction reduces the reporting burden on UE while providing the gNB with the specific interference information needed for accurate MCS selection.
Solution Approach 2:
The patent segments the CSI report into separate components: traditional channel measurements and new interference measurements. By dividing the report structure and allowing selective reporting of interference-related parameters, the system reduces overall reporting complexity and UE power consumption while maintaining measurement accuracy.
2Loss of information
If traditional CSI reports include channel measurements, then comprehensive channel state information is provided, but interference fluctuations are not effectively addressed and reporting burden increases
Solution Approach 1:
The patent extracts the interference measurement component from the traditional CSI report structure, creating a dedicated interference report format. This extraction allows the system to focus specifically on interference fluctuations without the overhead of including all traditional channel measurements, thereby reducing reporting complexity while addressing interference effectively.
Solution Approach 2:
The patent introduces dynamic interference measurement resources (IMRs) that can be configured and activated based on network conditions. This dynamic approach allows the system to adapt the reporting structure to actual interference conditions, reducing unnecessary reporting when interference is stable while maintaining comprehensive monitoring when interference fluctuations occur.
Data Source
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AI summary
A base station is configured to receive channel state information (CSI) from a user equipment (UE). The base station transmits configuration information including one or more interference measurement resources (IMRs) allocated for measurement by the UE, receives a reference CSI report from the UE, receives a new CSI report including interference and noise power fluctuation feedback from the UE and selects a modulation and coding scheme (MCS) for the UE based on at least the interference and noise power fluctuation feedback and the reference CSI report.