SCell Beam Failure Recovery for Independent Multi-TRP Detection

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Solution Overview

Problem

The existing NR system's SCell beam failure recovery mechanism is inadequate for multi-TRP scenarios, as it fails to detect and report beam failures independently for each TRP, leading to incomplete recovery when one TRP experiences blockage.

Innovation Solution

A method and apparatus for SCell beam failure recovery in multi-TRP systems, where the terminal device independently detects beam failures on PDCCH associated with each TRP, configures multiple sets of beam failure detection reference signals, and sends a beam failure recovery request using PUCCH transmission, allowing for efficient and timely recovery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the existing SCell BFR design is applied in multi-TRP system, then the device complexity is reduced, but the reliability of beam failure detection deteriorates because UE does not report beam failure when only some TRPs experience failure

Engineering Contradiction:

Improvecomplexity of beam failure detection mechanismVSAvoidreliability of beam failure detection

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent segments the beam failure detection mechanism by TRP, configuring separate beam failure detection reference signals for each TRP. This allows independent detection and reporting of beam failures per TRP, resolving the reliability issue while maintaining manageable complexity through structured segmentation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by allowing different beam failure detection configurations for different TRPs. Each TRP can have its own beam failure detection reference signals and thresholds, enabling localized optimization of detection reliability without uniformly increasing system complexity.

Inventive Principle:

Principle #3Local quality

2Reliability

If independent beam failure detection per TRP is implemented, then the reliability of beam failure recovery is improved, but the device complexity increases due to multiple reference signal configurations

Engineering Contradiction:

Improvereliability of beam failure recoveryVSAvoidcomplexity of reference signal configuration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments reference signal configurations by associating each TRP with dedicated beam failure detection reference signals. This structured segmentation improves reliability through independent detection while controlling complexity through systematic organization of multiple configurations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies universality by using a unified beam failure recovery framework that can handle multiple TRPs. The same recovery procedures and message structures are used across different TRPs, reducing the need for entirely separate mechanisms and thereby controlling complexity while maintaining reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12549297B2Method and apparatus of SCell beam failure recovery

Publication Date: 2026.02.10 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

Method and apparatus of SCell beam failure recovery are provided. The method includes: detecting, by a terminal device, beam failure on PDCCH associated with each TRP in a multi-TRP system in a SCell independently. In this solution, beam failure on PDCCH associated with each TRP in a multi-TRP system in a SCell can be detected independently, so that the beam failure can be reported high efficiently and beam recovery can be done in time.