DAPS Handover Failure Distinction Using Measurement Gap Indicators

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Solution Overview

Problem

Existing technologies struggle to distinguish between general handover failures and Dual Active Protocol Stack (DAPS) handover failures, and manage conflicts arising from multiple gaps with the same priority in wireless communication systems.

Innovation Solution

A method and device for distinguishing between general and DAPS handover failures by managing measurement gaps with overlapping time axes and priorities, allowing for specific gap operations to be performed based on these criteria.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple measurement gaps with the same priority are configured, then measurement coverage is improved, but conflict management complexity increases

Engineering Contradiction:

Improvehandover failure distinctionVSAvoidgap management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the measurement gap management by introducing distinct gap identifiers (first measurement gap and second measurement gap) with the same priority. Each gap is independently configured and managed, allowing the system to track and distinguish between different handover failure scenarios without creating complex conflict resolution mechanisms.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an intermediary indicator (first/second indicator) that explicitly marks the type of handover failure. This intermediary element mediates between the multiple measurement gaps and the failure detection mechanism, enabling clear distinction between general handover failures and DAPS handover failures without increasing overall system complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If measurement gaps with overlapping time axes are configured, then measurement precision is improved, but time resource management becomes more difficult

Engineering Contradiction:

Improvehandover failure detection precisionVSAvoidtime resource management overhead

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent segments the time resources by configuring multiple measurement gaps with overlapping time axes but distinct identifiers. Each gap operates independently with its own timing parameters, allowing precise handover failure detection without requiring complex time resource arbitration or conflict resolution mechanisms.

Inventive Principle:

Principle #1Segmentation

3Loss of information

If DAPS handover failure information is stored in VarRLF-Report, then information completeness is improved, but information distinction capability deteriorates

Engineering Contradiction:

Improvehandover failure information completenessVSAvoidfailure type distinction precision

Core Design Contradiction:

Loss of informationVSMeasurement precision

Solution Approach 1:

The patent introduces intermediary indicators (first indicator and second indicator) that are stored in the VarRLF-Report alongside handover failure information. These indicators act as mediators that explicitly mark whether a failure is a general handover failure or a DAPS handover failure, enabling both complete information storage and precise failure type distinction without conflict.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250365802A1Method and device for managing RLF information by terminal for supporting dual activation protocol stack in next generation mobile communication system

Publication Date: 2025.11.27 SAMSUNG ELECTRONICS CO LTD

AI summary

The present disclosure relates to a 5G or 6G communication systems for supporting higher data transmission rates. Proposed in the present disclosure is a method and device for distinguishing whether handover failure information is information occurring due to a general handover failure or information occurring due to a DAPS handover failure. Another purpose of the present disclosure is to propose a method and device for managing a conflict if a plurality of gaps with the same priority exist.