Multi-TRP SP-CSI Reporting for Unified Beam Management

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Solution Overview

Problem

Existing beam management techniques in multi-TRP networks struggle with efficient collection and reporting of channel state information (CSI) across multiple transmission reception points (TRPs), leading to suboptimal beam establishment and maintenance.

Innovation Solution

A baseband processor or user equipment (UE) collects CSI from multiple TRPs, generates a semi-persistent CSI (SP-CSI) report, and transmits it to a cell associated with these TRPs, using MAC CEs or DCI to activate/deactivate CSI reporting, enabling efficient CSI reporting and beam management across multiple TRPs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional separate CSI reporting methods are used for each TRP, then the reporting process becomes complex and resource-consuming, but beam management efficiency deteriorates

Engineering Contradiction:

Improvebeam management efficiencyVSAvoidCSI reporting complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent combines CSI reporting for multiple TRPs into a single unified report structure. Instead of maintaining separate reporting mechanisms for each TRP, the invention merges them into one consolidated report that contains CSI for all TRPs, thereby simplifying the reporting process while improving beam management efficiency across multiple transmission points

Inventive Principle:

Principle #5Merging (Combining)

2Loss of energy

If semi-persistent CSI reporting is implemented for multiple TRPs, then resource efficiency improves, but the complexity of managing multiple TRP reports increases

Engineering Contradiction:

Improveresource efficiencyVSAvoidmulti-TRP report management complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent merges multiple semi-persistent CSI reports for different TRPs into a single unified report structure. This consolidation reduces the overall signaling overhead and resource consumption while maintaining the ability to track channel state for each individual TRP, thus improving resource efficiency without proportionally increasing management complexity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The unified CSI report structure serves multiple functions simultaneously: it reports channel state information for multiple TRPs, enables beam management across all TRPs, and reduces signaling overhead. This multi-functional approach allows the system to achieve resource efficiency gains while keeping the reporting mechanism manageable

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Measurement precision

If CSI is collected and reported for each TRP individually, then beam establishment accuracy improves, but the time and resources required increase

Engineering Contradiction:

Improvebeam establishment accuracyVSAvoidCSI collection and reporting time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent combines CSI collection and reporting for multiple TRPs into a single unified process. By merging the reporting mechanism, the system maintains accurate beam establishment for each TRP while reducing the total time and resources required, as the unified report can be generated and transmitted in one operation rather than multiple separate operations

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12439441B2Reporting channel state information for multi-TRP operation

Publication Date: 2025.10.07 APPLE INC

AI summary

A user equipment (UE) reports channel state information for multiple transmission reception points (TRPs) to a network. The UE collects channel state information (CSI) corresponding to multiple transmission reception points (TRPs), receives a signal configured to trigger a semi-persistent CSI (SP-CSI) report from a first TRP of the multiple TRPs, generates a SP-CSI report that includes CSI corresponding to each TRP of the multiple TRPs and transmits the SP-CSI report to a cell associated with the multiple TRPs.