Single-Domain Registration Logic for Roaming UE

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Solution Overview

Problem

Existing mobile network technologies struggle to enforce single-domain registration of user equipment (UE) when roaming across different provider networks, leading to inconsistent data and potential interference between registrations using different International Mobile Subscriber Identities (IMSIs).

Innovation Solution

The implementation of single-domain-registration logic within the Subscriber Management Entity (SME) that cancels all previous registrations of a UE upon receiving a new registration, regardless of the IMSI used, ensuring that only one active registration exists at any given time across different network domains.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple registrations are allowed for roaming UE across different provider networks, then network coverage and service availability are improved, but data consistency deteriorates and registrations interfere with each other

Engineering Contradiction:

Improvenetwork coverageVSAvoiddata consistency

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent extracts the registration management function from the distributed network nodes and centralizes it in a single-domain registration manager. This centralization allows the system to maintain multiple registrations for roaming coverage while ensuring data consistency through centralized control, resolving the contradiction between adaptability and information integrity.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent implements a feedback mechanism where the single-domain registration manager continuously monitors registration states across different domains and automatically cancels conflicting registrations. This feedback loop ensures that data consistency is maintained while allowing flexible roaming registrations, thus resolving the contradiction between network adaptability and data integrity.

Inventive Principle:

Principle #23Feedback

2Loss of information

If single-domain registration is enforced to maintain data consistency, then data consistency is improved, but network coverage and service availability deteriorate

Engineering Contradiction:

Improvedata consistencyVSAvoidnetwork coverage

Core Design Contradiction:

Loss of informationVSAdaptability or versatility

Solution Approach 1:

The patent creates a universal registration management system that handles multiple registration types (home domain, roaming domain, visited domain) through a single centralized manager. This multi-functional approach allows the system to enforce data consistency while supporting various network scenarios and maintaining broad coverage, thus resolving the contradiction between consistency and adaptability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If automatic cancellation of previous registrations is implemented, then registration consistency is improved, but signaling overhead and network traffic increase

Engineering Contradiction:

Improveregistration consistencyVSAvoidbandwidth waste

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent implements preliminary action by having the single-domain registration manager proactively cancel previous registrations before new registrations are established. This prevents conflicting registrations from coexisting, ensuring registration consistency while minimizing the need for corrective signaling and reducing overall network traffic.

Inventive Principle:

Principle #10Preliminary action

4Reliability

If centralized registration management is implemented, then registration control is improved, but system complexity increases

Engineering Contradiction:

Improveregistration controlVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces a centralized single-domain registration manager as an intermediary between UE and multiple network domains. This intermediary simplifies the overall system architecture by providing a single point of control, reducing the complexity that would otherwise arise from distributed registration management across multiple autonomous nodes.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12289287B2Single-domain registration initiated cancellation

Publication Date: 2025.04.29 HEWLETT PACKARD ENTERPRISE DEV LP

AI summary

One aspect can provide a system and method for enforcing a single-domain registration of a user equipment (UE) roaming across different provider networks. During operation, the system can receive, at a subscriber-management entity (SME) from a first service node within a first provider's network, a location-update message associated with the UE. The system can identify a second service node within a second provider's network with which the UE has a previous registration and query a subscriber-information database to determine whether a single-domain-registration feature is enabled at the SME for the UE. In response to determining that the single-domain-registration feature is enabled, the system can send a location-cancellation message to the second service node to cause the second service node to cancel the previous registration of the UE and register the UE at the SME.