UE-Initiated Beam Reporting for Lower CSI Signaling Overhead

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Solution Overview

Problem

Legacy beam management procedures in wireless communication systems, such as LTE and 5G NR, face significant uplink and control signaling overhead due to frequent network-initiated beam reporting, while infrequent reporting can lead to outdated beam information, causing performance degradation.

Innovation Solution

Implement UE-initiated channel state information (CSI) reporting, where the user equipment (UE) autonomously determines beam quality and triggers reports when specific conditions are met, using configured resources and conditions to reduce unnecessary reporting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If frequent network-initiated beam reporting is implemented, then timely beam information is acquired, but uplink reporting overhead and control signaling overhead increase significantly

Engineering Contradiction:

Improvebeam information timelinessVSAvoiduplink reporting overhead

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent inverts the traditional network-initiated beam reporting mechanism by enabling UE-initiated beam reporting. The UE autonomously determines whether to trigger beam reporting based on beam quality conditions, eliminating the need for frequent network requests. This inversion reduces uplink overhead while maintaining timely beam information acquisition, as the UE only reports when necessary based on actual beam quality changes.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The UE is empowered to autonomously monitor beam quality metrics (such as RSRP, RSRQ, or SINR) and self-determine when beam reporting is needed based on pre-configured thresholds and conditions. This self-service approach eliminates dependency on network-triggered reporting, reducing control signaling overhead while ensuring beam information is reported timely when quality degrades below acceptable levels.

Inventive Principle:

Principle #25Self-service

2Quantity of substance

If less frequent beam reporting is used, then uplink reporting overhead is reduced, but the network acquires outdated beam information causing performance degradation

Engineering Contradiction:

Improveuplink reporting overheadVSAvoidbeam information accuracy

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where the UE continuously monitors beam quality metrics and compares them against pre-configured thresholds. When beam quality deteriorates below the threshold or improves by a certain margin, the UE triggers beam reporting. This feedback-driven approach ensures beam information is reported timely based on actual quality changes, maintaining accuracy while reducing overhead compared to fixed-frequency reporting.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The beam reporting frequency becomes dynamic rather than static. The UE adjusts reporting timing based on actual beam quality conditions, triggering reports only when quality changes warrant updates. This dynamic approach ensures beam information remains accurate and current without the overhead of fixed frequent reporting, as the system adapts reporting frequency to actual channel conditions.

Inventive Principle:

Principle #15Dynamics

3Productivity

If network configures or triggers frequent beam reporting, then best beams are acquired timely, but control signaling overhead increases

Engineering Contradiction:

Improvebeam acquisition speedVSAvoidcontrol signaling overhead

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The UE autonomously determines when beam reporting is needed by monitoring beam quality against pre-configured conditions, eliminating the need for network to configure or trigger frequent reporting. The network only provides initial configuration parameters, after which the UE independently manages beam quality monitoring and reporting triggers, significantly reducing control signaling overhead while maintaining fast beam acquisition capability.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The network performs preliminary configuration by providing the UE with beam quality thresholds, reporting formats, and resource allocations before UE-initiated reporting begins. This preliminary setup enables the UE to autonomously trigger reports when conditions are met, achieving fast beam acquisition without ongoing network control signaling for each report trigger.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250343584A1Signaling for UE initiated beam reporting

Publication Date: 2025.11.06 SAMSUNG ELECTRONICS CO LTD

AI summary

A user equipment (UE) capable of facilitating communications in a wireless system can include a transceiver and a processor. In some examples, the transceiver is to receive a UE initiated channel state information (CSI) reporting configuration indicating one or more resources for CSI measurements and a condition to evaluate. The processor can perform a CSI measurement on the one or more resources, determine the condition is satisfied, and initiate a UE initiated CSI report. The transceiver transmits the notification of the UE initiated CSI report. The transceiver receives, from the BS, a downlink control information (DCI) indicating a CSI trigger state associated with the UE initiated CSI report, the DCI indicating a physical uplink shared channel (PUSCH) resource for the UE initiated CSI reporting and transmits the UE initiated CSI reporting in the PUSCH resource indicated by the DCI.