CSI Spatial Domain Profile Selection for Multi-TRP Overhead Reduction

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing channel state information (CSI) overhead when multiple transmission reception points (TRPs) are involved, leading to wasteful overhead and suboptimal data transmission load-balancing.

Innovation Solution

A network node provides a CSI configuration with a reduced set of spatial domain (SD) profiles for a UE to select from, allowing the UE to transmit CSI indicating the selected SD profile, which the network node uses for coherent joint transmission (CJT) optimization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a full set of spatial domain profiles is provided for multiple TRPs, then the UE can select the optimal profile for data transmission, but the CSI overhead increases significantly

Engineering Contradiction:

Improvedata transmission optimizationVSAvoidCSI overhead

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent extracts only the necessary spatial domain profiles from the complete set and provides this reduced set to the UE. The network node determines which profiles are actually needed for the current transmission scenario and configures only those profiles in the CSI configuration, thereby reducing the overhead while maintaining the ability to optimize data transmission.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of providing the complete set of all possible spatial domain profiles (excessive action), the patent provides only a partial set that is sufficient for the current transmission requirements. This partial action reduces the CSI overhead while still enabling the UE to select an appropriate profile for optimization.

Inventive Principle:

Principle #16Partial or excessive action

2Productivity

If all available SD profiles are configured for UE selection, then transmission optimization is maximized, but load-balancing across TRPs becomes suboptimal

Engineering Contradiction:

Improvedata transmission efficiencyVSAvoidload-balancing capability

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent applies local quality by configuring different sets of spatial domain profiles for different UEs based on their specific locations, channel conditions, and traffic requirements. The network node determines which profiles to configure for each UE individually, allowing optimized transmission for each UE while maintaining overall load-balancing across TRPs through selective profile configuration.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20260039349A1Channel state information spatial domain profile configuration and selection for a plurality of transmission reception points

Publication Date: 2026.02.05 QUALCOMM INC

AI summary

A network node may transmit a channel state information (CSI) configuration including a set of spatial domain (SD) profiles associated with a plurality of SD basis quantities for each of a plurality of transmission reception points (TRPs). A user equipment (UE) may receive the CSI configuration including the set of SD profiles associated with the plurality of SD basis quantities for each of the plurality of TRPs. The UE may select an SD profile from the set of SD profiles associated with the plurality of SD basis quantities included in the CSI configuration. The UE may transmit, for the network node, CSI including the selected SD profile from the set of SD profiles associated with the plurality of SD basis quantities. The network node may receive the CSI including the selected SD profile from the set of SD profiles associated with the plurality of SD basis quantities.