Multi-TRP Beam Failure Recovery Using BFD RS Identification

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Solution Overview

Problem

In multi-TRP scenarios, determining beam failure events is unclear, hindering effective beam failure recovery mechanisms.

Innovation Solution

Measure BFD RSs corresponding to multiple pieces of first object information, including TRP identifiers, CORESETPoolIndex, group identifiers, and PCIs, to determine a target event and send BFRQ information for beam failure recovery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If beam failure detection is implemented in multi-TRP scenario, then beam failure recovery capability is improved, but the complexity of determining beam failure events increases

Engineering Contradiction:

Improvebeam failure recovery capabilityVSAvoidcomplexity of determining beam failure events

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the beam failure detection process by associating different BFD RS resources with different TRPs through first object information (TRP identifier, CORESETPoolIndex, group identifier, cell identity, or PCI). This segmentation allows independent monitoring of beam conditions for each TRP, enabling targeted recovery actions without requiring complex system-wide analysis.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a new dimension for beam failure determination by using first object information to create an additional identification layer beyond traditional beam RS measurement. This dimension allows the system to distinguish which TRP experienced beam failure, transforming a single-dimensional beam quality check into a multi-dimensional detection framework that includes TRP identification.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Measurement precision

If multiple BFD RS measurements are performed for different TRPs, then beam failure identification accuracy is improved, but the measurement and processing time increases

Engineering Contradiction:

Improvebeam failure identification accuracyVSAvoidmeasurement and processing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent performs preliminary action by pre-configuring the association between BFD RS resources and TRPs through first object information before beam failure occurs. This pre-establishment of identification relationships allows the terminal to quickly determine which TRP experienced failure by simply checking the first object information of the failed BFD RS, without requiring time-consuming analysis of multiple measurement results.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses copying by replicating the first object information identifier across multiple BFD RS resources associated with the same TRP. When beam failure is detected on any BFD RS, the copied first object information immediately identifies the affected TRP, eliminating the need to analyze all measurement results in detail and significantly reducing processing time.

Inventive Principle:

Principle #26Copying

Data Source

PatentEP4723792A2Beam failure recovery method, terminal, and network device

Publication Date: 2026.04.08 VIVO MOBILE COMM CO LTD

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AI summary

Embodiments of the present invention provide a beam failure recovery method, a terminal, and a network device, where the beam failure recovery method includes: measuring a BFD RS; where the BFD RS corresponds to a plurality of pieces of first object information, and the first object information includes at least one of the following: a TRP identifier, CORESETPoolIndex information, a group identifier, a cell identity, and a PCI; determining a target event based on a measurement result of the BFD RS; and sending BFRQ information.