Terminal Registration Switching Between Private Core Networks

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Solution Overview

Problem

Existing technologies face challenges in enabling a terminal apparatus to seamlessly move between multiple private networks, as roaming mechanisms are complex and costly, and do not effectively handle the registration and deregistration processes in small private networks.

Innovation Solution

A terminal apparatus with a communication section and control section that allows it to cancel registration from one private network and register with another based on its position, facilitating smooth transitions between different private networks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If roaming mechanism is applied to enable terminal apparatus to move between private networks, then mobility between networks is improved, but device complexity and cost increase significantly

Engineering Contradiction:

Improvemobility between private networksVSAvoidroaming mechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent extracts the core registration/deregistration functionality from the complex roaming mechanism. Instead of implementing full roaming protocols, the terminal apparatus independently performs registration with the new private network's core network and deregistration from the old network, removing unnecessary roaming complexity while retaining mobility capability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The terminal apparatus autonomously manages its own registration status across different private networks. The control section automatically detects position changes, determines when to switch networks, and executes registration/deregistration procedures without requiring complex roaming agreements or intermediary systems

Inventive Principle:

Principle #25Self-service

2Adaptability or versatility

If traditional roaming is implemented for private networks, then network mobility is enabled, but operational cost and procedure complexity increase

Engineering Contradiction:

Improvenetwork switching capabilityVSAvoidregistration procedure simplicity

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

Instead of following the traditional roaming approach where the network manages terminal movement, the patent inverts the control to the terminal apparatus. The terminal's control section actively manages registration status based on position information, simplifying the operational procedure while achieving the same mobility outcome

Inventive Principle:

Principle #13The other way round (Inversion)

3Area of stationary object

If the terminal apparatus maintains registration with multiple core networks simultaneously, then network coverage is improved, but information management complexity increases

Engineering Contradiction:

Improvenetwork coverage areaVSAvoidregistration status tracking

Core Design Contradiction:

Area of stationary objectVSLoss of information

Solution Approach 1:

The terminal apparatus periodically updates its position information and re-evaluates which private network it should be registered with. This periodic checking mechanism ensures the terminal maintains registration with the appropriate network based on current position, managing registration status efficiently without continuous complex tracking

Inventive Principle:

Principle #19Periodic action

Data Source

PatentEP4694361A1Terminal device, communication device, communication system, and communication method

Publication Date: 2026.02.11 SONY GROUP CORP

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AI summary

A terminal apparatus of the present disclosure includes a communication section and a control section. The communication section communicates with a first private network including a first core network in a first area. Alternatively, the communication section communicates with a second private network including a second core network different from the first core network in a second area. The control section cancels registration of the first core network and performs registration to the second core network according to the position of the own apparatus.