UE MDT Configuration Conflict Resolution in Dual Connectivity

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Solution Overview

Problem

Existing 3GPP standards prevent a UE from receiving multiple UL PDCP packet average delay configurations for a single type of bearer, yet recent developments have led to scenarios where both the MN and SN may configure such measurements, causing conflicts.

Innovation Solution

A UE receives multiple UL PDCP packet average delay configurations for the same bearer type from different network nodes, selecting one configuration and reporting accordingly, or rejecting duplicate configurations from the same node to avoid conflicts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If both MN and SN configure UL PDCP packet average delay measurements for the same bearer type, then measurement coverage is improved, but configuration conflicts occur

Engineering Contradiction:

Improvemeasurement coverageVSAvoidconfiguration consistency

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent applies local quality by allowing different configuration rules for different bearer types. MCG bearers use one configuration approach while SCG and split bearers use another, enabling both MN and SN to configure measurements appropriately for their respective bearer types without conflict

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of preventing multiple configurations from different nodes, the patent inverts the approach by allowing it but requiring the UE to select one configuration based on bearer type. The UE prioritizes configurations from the appropriate node type (MN for MCG, SN for SCG/split) rather than blocking the configuration entirely

Inventive Principle:

Principle #13The other way round (Inversion)

2Adaptability or versatility

If a UE receives multiple MDT configurations for the same bearer type from different network nodes, then measurement capability is enhanced, but configuration management complexity increases

Engineering Contradiction:

Improvemeasurement capabilityVSAvoidconfiguration management

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent changes the parameter of configuration selection based on bearer type. The UE uses different selection criteria depending on whether the bearer is MCG, SCG, or split type, simplifying the decision logic by making it rule-based rather than requiring complex conflict resolution algorithms

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If the UE applies multiple MDT configurations simultaneously, then measurement thoroughness is improved, but processing overhead increases

Engineering Contradiction:

Improvemeasurement thoroughnessVSAvoidprocessing overhead

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent extracts and applies only the relevant MDT configuration based on bearer type, discarding the other configuration. This selective approach maintains measurement thoroughness for each bearer type while avoiding the processing overhead of managing and applying multiple conflicting configurations simultaneously

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP4442028B1Minimization of drive test configuration in user equipment

Publication Date: 2025.10.29 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

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AI summary

The disclosure provides a method in a user equipment (UE), comprising: receiving, from a first network node, a first Minimization of Drive Tests (MDT) configuration relating to measurements for a first data radio bearer (DRB) of a first DRB type; receiving, from a second network node, a second MDT configuration relating to measurements for a second DRB of the first DRB type; and reporting a plurality of measurement reports.