Carrier Aggregation Beam Recovery Using Grouped Failure Detection

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Solution Overview

Problem

In wireless communication systems supporting carrier aggregation, particularly at higher frequency bands like FR2 or millimeter wave, detecting and recovering from beam failures involves significant power consumption due to the need for numerous operations across multiple antenna beams in multiple component carriers.

Innovation Solution

A method for wireless communication devices to automatically detect beam failures and recover across multiple component carriers by detecting a failure in one beam and using that information to determine failures and switch beams for other carriers within the same group, reducing the need for individual measurements and processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If individual beam failure detection and recovery operations are performed for each component carrier in carrier aggregation, then beam failure detection reliability is improved, but power consumption increases

Engineering Contradiction:

Improvebeam failure detection reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent merges beam failure detection operations across multiple component carriers by detecting beam failure on a first CC and automatically determining beam failure on second CCs within the same group, combining multiple detection tasks into a single detection event to reduce power consumption while maintaining reliability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent makes the beam failure detection mechanism universal across multiple component carriers by establishing that a beam failure detected on one CC serves as a universal indicator for the entire group of CCs, allowing the same detection result to be applied across multiple carriers

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If comprehensive signal measurements are performed across all component carriers, then beam failure detection accuracy is improved, but processing complexity increases

Engineering Contradiction:

Improvebeam failure detection accuracyVSAvoidprocessing complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent extracts the beam failure detection measurement from individual component carriers and performs it once at the group level by detecting failure on a representative first CC and extrapolating the result to other CCs in the same group, eliminating redundant measurements and reducing processing complexity

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP4176525B1Beam failure detection and recovery with carrier aggregation

Publication Date: 2025.11.19 QUALCOMM INC

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AI summary

This disclosure provides systems, methods, and apparatuses, including computer programs encoded on computer storage media, for wireless communication. In one aspect of the disclosure, a user equipment (UE) detects a beam failure of a first beam for a first component carrier (CC) based on a link quality associated with the first beam for the first CC. The first CC and a second CC are within a same group of CCs. The UE initiates one or more beam failure recovery operations associated with any CC within the same group of CCs as the first and second CCs based on a determination of a beam failure of a second beam for the second CC. The determination is based on the detection of the beam failure for the first CC and based on the first CC and the second CC being within the same group of CCs.