Shared Serving Beam Reconfiguration for Multi-Cell Failure Recovery

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Solution Overview

Problem

Beam failure in a first cell can lead to beam failure in one or more second cells when they share the same serving beam, resulting in increased signaling overhead and battery consumption due to separate reconfiguration messages for each cell.

Innovation Solution

A wireless device is configured to switch to a second serving beam in multiple cells based on a reconfiguration message for a first cell, using beam failure recovery parameters, thereby avoiding separate reconfiguration messages for the second cells.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate reconfiguration messages are sent for each cell experiencing beam failure, then beam failure recovery is achieved, but signaling overhead and battery consumption increase

Engineering Contradiction:

Improvebeam failure recoveryVSAvoidbattery consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent merges the reconfiguration processes of multiple cells by applying a single reconfiguration message from the first cell to multiple second cells that share the same serving beam. This combining approach reduces the number of separate reconfiguration messages needed, thereby reducing signaling overhead and battery consumption while maintaining beam failure recovery capability across all affected cells.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If separate reconfiguration messages are sent for each cell experiencing beam failure, then beam failure recovery is achieved, but signaling overhead increases

Engineering Contradiction:

Improvebeam failure recoveryVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

3Device complexity

If the wireless device uses the same serving beam for multiple cells, then device complexity is reduced, but beam failure propagates across all cells using that beam

Engineering Contradiction:

Improvebeam management complexityVSAvoidbeam failure propagation

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent segments the beam failure recovery process by identifying which cells share the same serving beam and applying recovery actions selectively. Instead of treating all cells independently or all collectively, the solution segments the recovery process to apply a single reconfiguration message only to cells that share the same serving beam, reducing unnecessary signaling while maintaining reliability.

Inventive Principle:

Principle #1Segmentation

4Reliability

If a reconfiguration message is sent for the first cell, then beam failure recovery is initiated, but additional messages are needed for second cells

Engineering Contradiction:

Improvebeam failure recoveryVSAvoidreconfiguration time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-configuring the wireless device to recognize that second cells share the same serving beam as the first cell. When beam failure occurs in the first cell, the device can proactively apply the reconfiguration message to all affected second cells without waiting for separate messages, reducing reconfiguration time while maintaining reliability.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3629492B1Beam configuration for secondary cells

Publication Date: 2026.01.07 OFINNO LLC

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AI summary

Beam failure recovery procedures for wireless communications are described. A base station may send a reconfiguration message for a first cell that changes a serving beam for the first cell from a first beam to a second beam. A wireless device may use the reconfiguration message for a second cell to change a serving beam for the second cell from the first beam to the second beam.