Terminal Device Beam Failure Recovery Management

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Solution Overview

Problem

The integration of beam prediction technology in telecommunications poses challenges in managing beam failure recovery (BFR) procedures effectively, as it may not account for unexpected events such as obstacles or terminal device rotations.

Innovation Solution

A method and system for managing BFR procedures based on beam prediction, where a terminal device receives indications of transmission configuration indicator (TCI) states from a network device and determines whether to perform a BFR procedure in association with each TCI state, thereby optimizing BFR management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If beam prediction is used to avoid BFR procedures, then beam failure occurrence is reduced, but unexpected events such as obstacles or terminal device rotations cannot be handled

Engineering Contradiction:

Improvebeam failure preventionVSAvoidresponse to unexpected events

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The system performs preliminary beam prediction using AI/ML to proactively switch beams before failure occurs, reducing the need for BFR procedures. Simultaneously, it maintains the capability to detect beam failure events and execute BFR when unexpected events occur, combining preventive and reactive approaches.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts the BFR procedure based on the application time of TCI states. When beam prediction is active and TCI states are applied, the BFR procedure is stopped to avoid conflicts. When prediction is not applicable or beam failure occurs, the BFR procedure is enabled, creating a flexible, condition-based system.

Inventive Principle:

Principle #15Dynamics

2Reliability

If BFR procedure is continuously performed to handle unexpected events, then beam reliability is maintained, but power consumption and resource overhead increase

Engineering Contradiction:

Improvebeam failure recoveryVSAvoidterminal device power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

Instead of continuously performing BFR procedures, the system applies partial action by selectively enabling BFR only when necessary. The BFR procedure is stopped during the application time of TCI states when beam prediction is active, and only triggered when beam failure events occur or prediction is not applicable, reducing unnecessary power consumption while maintaining reliability.

Inventive Principle:

Principle #16Partial or excessive action

3Measurement precision

If beam prediction is applied for long-term TCI states, then beam switching accuracy is improved, but conflict with existing BFR procedure increases

Engineering Contradiction:

Improvebeam prediction accuracyVSAvoidBFR procedure management

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The system segments the BFR procedure management by dividing it into different time periods: during the application time of TCI states, the BFR procedure is stopped and beam switching is controlled by TCI state indications; outside this period, the BFR procedure is enabled for handling beam failures. This segmentation resolves the conflict between beam prediction and BFR procedure.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20250176052A1Method, device and computer storage medium of communication

Publication Date: 2025.05.29 NEC CORP

AI summary

Embodiments of the present disclosure relate to methods, devices and computer readable media of communication. A terminal device receives, from a network device, a first indication indicating a set of TCI states for a CORESET and determines whether a BFR procedure is to be performed in application time associated with at least one TCI state in the set of TCI states. If no BFR procedure is to be performed, the terminal device stops the BFR procedure in the application time associated with the at least one TCI state. If the BFR procedure is to be performed, the terminal device performs the BFR procedure in the application time associated with the at least one TCI state. In this way, management of a BFR procedure based on beam prediction may be achieved.