Roaming DNN Replacement via Home Network Message Mediation

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Solution Overview

Problem

Existing communication networks face challenges in managing data network name (DNN) compatibility for roaming subscribers, as visited networks may assign DNNs that are not recognized by the home network, leading to inefficient and unstandardized DNN replacement logic.

Innovation Solution

Implementing a home network system with a security edge protection proxy (SEPP) to intercept and modify messages from visited networks, replacing or adding compatible DNN values to ensure seamless communication and compatibility with the home network's DNN standards.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the visited network supplies a DNN for the roaming UE, then the UE can access the visited network, but the DNN may not be recognized or compatible with the home network

Engineering Contradiction:

Improvenetwork compatibilityVSAvoidDNN recognition

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The home network acts as an intermediary between the visited network and the UE. The home network receives the DNN from the visited network, validates it against home network policies, and modifies or replaces it with a compatible DNN before forwarding it to the UE. This intermediary function ensures compatibility without requiring the visited network to know home network specifics.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The home network performs preliminary validation and modification of the DNN before it reaches the UE. By checking compatibility and preparing the correct DNN in advance, the system avoids connection failures and ensures smooth roaming operations.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the home network modifies the DNN in roaming scenarios, then DNN compatibility is improved, but the complexity of network management increases

Engineering Contradiction:

ImproveDNN compatibilityVSAvoidnetwork management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The home network autonomously manages DNN replacement without requiring manual intervention or complex configuration at the visited network. The system automatically validates, modifies, and replaces DNNs based on predefined policies, simplifying management despite the added functionality.

Inventive Principle:

Principle #25Self-service

3Adaptability or versatility

If different roaming partners use different DNN replacement logic, then each network can optimize for its own requirements, but standardization and interoperability deteriorate

Engineering Contradiction:

Improvenetwork optimizationVSAvoidstandardization

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The home network implements a universal DNN replacement mechanism that works across all roaming partners. The same validation and modification logic applies regardless of which visited network is involved, providing consistent behavior while allowing each network to optimize its own DNN selection policies.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20260032415A1Data network name replacement for roaming subscribers

Publication Date: 2026.01.29 ORACLE INT CORP

AI summary

Various embodiments of the present technology generally relate to systems and methods for controlling data network name (DNN) or access point name (APN) replacement for roaming mobile subscribers at the home network. A home network system may modify a message, from a visited network regarding a roaming user equipment (UE) associated with the home network system, to include a local data network identifier value compatible with the home network system, and process the message based on the local data network identifier value.