5G Non-3PP Terminal Registration Management via AMF

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Solution Overview

Problem

The challenge in managing the registration state for a terminal in a 5G network via non-3GPP access, particularly in maintaining connected mode without idle mode and handling scenarios with or without PDU sessions, differs from 3GPP access, requiring a distinct management approach.

Innovation Solution

A method involving message exchanges between the AMF and base station to request and transmit location information, including a time stamp, and handling RRC inactive states, allows for efficient registration management and mobility procedures without establishing a session.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a terminal accesses 5G network via non-3GPP access, then connectivity and service availability are improved, but registration state management complexity increases due to differences from 3GPP access procedures

Engineering Contradiction:

Improvenetwork access capabilityVSAvoidregistration state management

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the registration management process into distinct states (REGISTERED, NOT-REGISTERED, PDU SESSION RELEASED) and handles each state separately with specific message exchange procedures. This segmentation allows the system to manage non-3GPP access registration complexity by breaking it down into manageable state transitions rather than treating it as a monolithic complex process.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent inverts the traditional approach by allowing the terminal to remain in CONNECTED mode without transitioning to IDLE mode in non-3GPP access, which is opposite to 3GPP access behavior. This inversion simplifies the management for specific scenarios by maintaining connection state rather than managing state transitions, thereby reducing complexity for those specific cases.

Inventive Principle:

Principle #13The other way round (Inversion)

2Productivity

If the terminal maintains connected mode without idle mode in non-3GPP access, then mobility management efficiency is improved, but network resource consumption increases

Engineering Contradiction:

Improvemobility management efficiencyVSAvoidnetwork resource consumption

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent implements dynamic resource management by allowing the terminal to transition between CONNECTED mode without IDLE mode based on service requirements and network conditions. The system dynamically releases PDU sessions when not in use while maintaining the registered state, enabling flexible resource allocation that optimizes both mobility management efficiency and network resource consumption.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the operational parameters of the terminal by introducing a new operational mode where the terminal remains in CONNECTED state without transitioning to IDLE. This parameter change (maintaining connection state) improves mobility management efficiency by avoiding repeated connection establishment, while the system compensates by releasing PDU sessions to control resource consumption.

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If location information management is implemented with time stamp for inactive states, then mobility management precision is improved, but signaling overhead increases

Engineering Contradiction:

Improvelocation information accuracyVSAvoidsignaling overhead

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent applies preliminary action by having the base station store location information with time stamps while the terminal is in RRC inactive state, before the terminal actually moves or the network needs to reach it. This preliminary storage of location data with temporal information allows the network to efficiently determine whether to page the terminal or use stored location info, improving precision while controlling signaling overhead by avoiding unnecessary updates.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses partial action by implementing location information management with time stamps only for terminals in RRC inactive state, not for all terminals in all states. This selective application of location tracking with temporal information provides sufficient precision for mobility management of inactive terminals while minimizing the signaling overhead that would result from universal implementation.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentEP3860240B1Registration management method for terminal accessing 5g network on non-3GPP access

Publication Date: 2024.10.09 SAMSUNG ELECTRONICS CO LTD

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AI summary

The disclosure relates to a communication technique of fusing a fifth generation (5G) communication for supporting higher data transmission rate beyond a fourth generation (4G) system with an Internet of things (IoT) technology and a system thereof. The disclosure may be applied to an intelligent service (smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security and safety related service, or the like) based on the 5G communication technology and the IoT related technology. The disclosure relates to a method for effectively managing a registration state for a terminal in a 5G core network such as an access and mobility management function (AMF) in a situation of accessing a 5G network via a non-3rd generation partnership project (3GPP) access.