UE NBIFOM Conflict Detection and Suspension

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Solution Overview

Problem

In mobile communication systems, the existing technologies face challenges in efficiently managing network-based IP flow mobility (NBIFOM) due to conflicts between WLAN offloadability indications and policies, leading to resource wastage and reduced network resource utilization.

Innovation Solution

A method where user equipment (UE) receives indications from the Mobility Management Entity (MME) about WLAN offloadability and NBIFOM capabilities, determines conflicts, and decides to suspend or resume NBIFOM based on these, transmitting messages to the PDN Gateway (P-GW) to manage NBIFOM capability activation or deactivation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If NBIFOM is activated to enable flexible traffic routing between 3GPP and non-3GPP networks, then traffic routing efficiency is improved, but policy conflicts between WLAN offloadability indications and NBIFOM capabilities occur leading to resource wastage

Engineering Contradiction:

Improvetraffic routing efficiencyVSAvoidnetwork resource wastage

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The UE performs preliminary conflict detection between WLAN offloadability indications and NBIFOM capabilities before activating NBIFOM. By checking for conflicts in advance and suspending NBIFOM when conflicts are detected, the system prevents unnecessary network resource wastage while maintaining traffic routing efficiency when conditions are favorable.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts NBIFOM activation status based on real-time conflict detection between WLAN offloadability indications and NBIFOM capabilities. The UE can suspend or resume NBIFOM depending on whether conflicts are present, allowing flexible adaptation to changing network conditions and policy requirements.

Inventive Principle:

Principle #15Dynamics

2Loss of energy

If NBIFOM is suspended to avoid policy conflicts, then network resource utilization is improved, but traffic routing flexibility is reduced

Engineering Contradiction:

Improvenetwork resource utilizationVSAvoidtraffic routing flexibility

Core Design Contradiction:

Loss of energyVSAdaptability or versatility

Solution Approach 1:

The system dynamically switches between suspending and activating NBIFOM based on the presence of policy conflicts. When no conflicts are detected, NBIFOM is activated to provide full traffic routing flexibility. When conflicts arise, NBIFOM is suspended to optimize network resource utilization, achieving adaptive balance between the two objectives.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the operational state parameter of NBIFOM (activated/suspended) based on conflict detection results. This parameter change allows the system to optimize network resource utilization by suspending NBIFOM during conflicts while maintaining routing flexibility through activation during non-conflict periods.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If conflict detection and resolution mechanisms are implemented, then policy conflicts are prevented, but signaling overhead increases

Engineering Contradiction:

Improvepolicy conflict preventionVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The conflict detection and resolution functionality is extracted and implemented specifically at the UE side, where the UE autonomously detects conflicts between WLAN offloadability indications and NBIFOM capabilities. This localized implementation prevents policy conflicts without requiring extensive network-side signaling, as the UE can determine conflict presence based on locally received information.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The UE performs self-service conflict detection and NBIFOM suspension/resumption decisions based on received WLAN offloadability indications and NBIFOM capabilities. By enabling the UE to autonomously manage conflict resolution, the system achieves reliable policy conflict prevention with minimal additional signaling overhead, as the UE uses its own received information to make decisions.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS10455471B2Method and user equipment for performing network selection and traffic routing

Publication Date: 2019.10.22 LG ELECTRONICS INC

AI summary

The present description discloses a method for performing network selection and traffic routing by a user equipment (UE). The method can comprise the steps of: a non-access stratum (NAS) of the UE receiving from a mobility management entity (MME) an indication, for wireless local area network (WLAN) offloadability for a first public data network (PDN) connection, and information about a network-based IP flow mobility (NBIFOM); the NAS of the UE determining whether or not a collision exists between the indication and information; the NAS of the UE deciding for a suspension of the NBIFOM on the basis of the existence of collision; and the NAS of the UE transmitting to a PDN gateway (P-GW) a message or information, notifying the suspension of the NBIFOM, on the basis of the decision for the suspension of the NBIFOM.