Sequential UE Registration in Identical PLMN

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Solution Overview

Problem

Current wireless communication systems face challenges in managing registration procedures for 3GPP and non-3GPP accesses within the same Public Land Mobile Network (PLMN), leading to inefficiencies in authentication, mobility management, and session management.

Innovation Solution

A method where a user equipment (UE) performs registration through a first network access and then a second network access, with the second access initiated only after the first is completed, utilizing information from the first access for AMF selection, ensuring an identical network function is allocated for comprehensive management across both accesses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If a UE performs simultaneous registration through multiple network accesses (3GPP and non-3GPP) in the same PLMN, then registration speed and service availability are improved, but network function allocation becomes complex and management efficiency deteriorates

Engineering Contradiction:

Improveregistration speedVSAvoidnetwork function allocation complexity

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by having the UE store AMF selection information obtained during the first registration procedure. This pre-stored information is then reused in the second registration procedure, eliminating the need for real-time AMF selection and avoiding the complexity of allocating multiple network functions simultaneously.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If a UE performs sequential registration through first and second network accesses, then network function allocation becomes simple and management efficiency is improved, but registration time increases

Engineering Contradiction:

Improvemanagement efficiencyVSAvoidregistration time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If different AMFs are allocated for different network accesses, then access-specific optimization is improved, but authentication and mobility management consistency deteriorates

Engineering Contradiction:

Improveaccess-specific optimizationVSAvoidauthentication consistency

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent applies universality by allocating the same AMF to handle multiple network accesses (both 3GPP and non-3GPP). This single AMF performs multiple functions including authentication, mobility management, and session management across different access types, ensuring consistent UE state management and eliminating the need for separate AMF allocations for each access.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP3541125B1Registration method through network access belonging to identical PLMN in wireless communication system, and device therefor

Publication Date: 2021.08.18 LG ELECTRONICS INC

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AI summary

An embodiment of the present invention relates to a method for performing a registration through a first network access and a second network access by user equipment (UE) in a wireless communication system, the method comprising the steps of: performing a registration through a first network access by UE; and performing a registration through a second network access by the UE, wherein when the first network access and the second network access belong to an identical public land mobile network (PLMN), the UE starts a registration through the second network access only after a registration procedure thereof through the first network access has been completed.