Interference and Noise Power Fluctuation Reporting in 5G NR

Solution Overview

Problem

In 5G NR wireless communications, frequent Channel State Information (CSI) reports from user equipment (UE) to the gNB are burdensome due to increased interference fluctuation, leading to high power consumption and monitoring demands, especially in ultra-reliable and low latency communications (URLLC) where SINR changes are primarily caused by interference rather than channel variations.

Innovation Solution

A new CSI report is defined that includes only interference and noise measurements, reducing the burden on the UE while providing the gNB with necessary information for determining the modulation and coding scheme (MCS), with options for reporting interference and noise power fluctuation or multiple SINR statistics, and using a reference CSI report for normalization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If frequent CSI reports are transmitted to provide accurate channel state information, then the gNB can select optimal MCS, but the UE power consumption and monitoring demands increase significantly

Engineering Contradiction:

Improvechannel state information accuracyVSAvoidUE power consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent extracts only the interference and noise power components from the full CSI report, separating them from other channel state parameters. This selective reporting focuses transmission resources on the most critical information for MCS selection in interference-dominated scenarios, reducing overall reporting burden while maintaining essential accuracy.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent changes the reporting parameters from comprehensive CSI (including channel quality, rank, precoding information) to specifically interference and noise power metrics. This parameter transformation aligns the reported data with the primary source of SINR variations in URLLC, reducing reporting complexity and UE processing requirements.

Inventive Principle:

Principle #35Parameter changes

2Loss of information

If comprehensive CSI reports are transmitted to capture all channel variations, then the gNB has complete information for MCS selection, but the reporting overhead and processing complexity increase

Engineering Contradiction:

Improvechannel state information completenessVSAvoidreporting and processing complexity

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The patent extracts only the interference and noise power components from the full CSI report, separating them from other channel state parameters. This selective reporting focuses transmission resources on the most critical information for MCS selection in interference-dominated scenarios, reducing overall reporting burden while maintaining essential accuracy.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent applies partial action by reporting only the specific interference and noise components that are most relevant for MCS selection in URLLC, rather than transmitting complete CSI. This partial reporting strategy provides sufficient information for the primary function (MCS selection) while reducing overhead, accepting that some less critical channel state details are omitted.

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If full CSI reports are used to model SINR, then accurate power control can be achieved, but the reporting burden increases especially when interference is the primary SINR variable

Engineering Contradiction:

Improvepower control accuracyVSAvoidreporting data volume

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent changes the reporting parameters from comprehensive CSI (including channel quality, rank, precoding information) to specifically interference and noise power metrics. This parameter transformation aligns the reported data with the primary source of SINR variations in URLLC, reducing reporting complexity and UE processing requirements.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent extracts only the interference and noise power components from the full CSI report, separating them from other channel state parameters. This selective reporting focuses transmission resources on the most critical information for MCS selection in interference-dominated scenarios, reducing overall reporting burden while maintaining essential accuracy.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12082032B2Reporting interference and noise power fluctuations

Publication Date: 2024.09.03 APPLE INC

AI summary

A user equipment (UE) is configured to report channel state information (CSI) to a base station of a network. The UE receives configuration information from the base station including one or more interference measurement resources (IMRs) to be measured by the UE, determines a noise power for each of the IMRs, transmits a reference channel state information (CSI) report the base station, measures CSI reference signals (CSI RS) transmitted by the base station to determine an interference and noise power for each of the one or more IMRs and transmits a new CSI report including one of i) only interference and noise power fluctuation feedback or ii) multiple signal-to-interference-plus-noise ratio (SINR) or SINR statistics to the base station.