UE-Assisted CSI Reporting for Lower 5G Signaling Overhead

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional 5G technology faces challenges in acquiring full channel information due to high UL signaling overhead and compression loss, and UE is better positioned to determine suitable CSI configurations based on current channel conditions.

Innovation Solution

UE receives CSI configuration from the network node, performs measurements, and transmits assistance information to help determine optimal CSI reporting configurations, reducing signaling overhead and improving DL throughput.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If gNB determines CSI configuration unilaterally, then network control is maintained, but signaling overhead increases and compression loss occurs

Engineering Contradiction:

Improvecompression lossVSAvoidsignaling overhead

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The UE autonomously determines assistance information based on its own CSI measurements and channel conditions, without requiring gNB to process and compress full channel information. This self-service approach eliminates compression loss and reduces UL signaling overhead, as the UE independently selects appropriate CSI configurations and reports only necessary assistance information to the network.

Inventive Principle:

Principle #25Self-service

2Productivity

If UE assists in determining CSI configuration, then signaling overhead is reduced, but network control is diminished

Engineering Contradiction:

ImproveDL throughputVSAvoidnetwork control

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The UE provides feedback in the form of assistance information based on its CSI measurements and channel conditions. The gNB uses this feedback to determine the final CSI configuration, maintaining network control while benefiting from UE's local channel knowledge. This feedback mechanism enables the network to make informed decisions without requiring full channel information from the UE.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If CSI measurement and reporting frequency is increased, then channel information accuracy improves, but signaling overhead increases

Engineering Contradiction:

Improvechannel information accuracyVSAvoidsignaling overhead

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The CSI measurement and reporting configuration becomes dynamic, adapting to current channel conditions. The UE assists by providing information about channel variation characteristics, enabling the gNB to adjust the CSI reporting frequency dynamically. When channel conditions are stable, reporting frequency is reduced to save overhead; when conditions change rapidly, frequency is increased to maintain accuracy.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12581341B2Apparatus and method for assistance information transmission and CSI reporting

Publication Date: 2026.03.17 MEDIATEK INC

AI summary

Apparatus and method for assistance information transmission and CSI reporting are proposed. The network node may allocate channel state information (CSI) configuration for the UE and transmit the CSI configuration to the UE. The UE may perform CSI measurement based on the CSI configuration from the network node, determine the assistance information based on the CSI measurement result, and transmit the assistance information the network node to improve the downlink (DL) throughput and save the signaling overhead of CSI measurement or CSI reporting.