User Equipment Policy Mapping Between 5G and 4G Systems

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Solution Overview

Problem

In 4G mobile communication systems, the lack of deployed Access Network Discovery and Selection Function (ANDSF) network elements hinders user equipment (UE) from determining necessary policies, such as UE route selection policies, when transitioning between different mobile communication systems.

Innovation Solution

A method and device for UE to map policies from one mobile communication system to another, specifically from a 5G system to a 4G system, by copying and adapting policies like UE route selection policies, ensuring seamless policy usage across systems without relying on ANDSF elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If UE relies on ANDSF network elements to obtain policies in 4G system, then policy management is standardized, but deployment complexity increases and many service providers have not deployed ANDSF

Engineering Contradiction:

Improvepolicy compatibilityVSAvoidnetwork deployment complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies the copying principle by replicating 5G URSP policy rules into 4G ANDSP format. The UE internally copies and transforms policy data structures from the 5G system to the 4G system, allowing policy information to be reused across different mobile communication systems without requiring actual ANDSF network elements to be deployed.

Inventive Principle:

Principle #26Copying

2Adaptability or versatility

If UE moves from 5G to 4G system, then network flexibility is improved, but policy continuity is lost without ANDSF

Engineering Contradiction:

Improvenetwork mobilityVSAvoidpolicy continuity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-mapping 5G URSP rules to 4G ANDSP format before the UE actually moves between systems. The policy transformation is performed in advance, storing the mapped policies in the UE so that when system transition occurs, policy continuity is automatically maintained without requiring real-time ANDSF intervention.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If ANDSF is deployed for policy management, then policy enforcement is reliable, but service provider deployment cost increases

Engineering Contradiction:

Improvepolicy enforcementVSAvoiddeployment ease

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies self-service by enabling the UE to autonomously perform policy mapping and transformation without requiring external ANDSF network elements. The UE's processor independently maps 5G URSP rules to 4G ANDSP format, transforming policy data structures and maintaining policy enforcement capability entirely through device-side processing, eliminating the need for service provider deployment of ANDSF infrastructure.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS11637780B2Policy mapping method and device, and user equipment

Publication Date: 2023.04.25 TOYOTA JIDOSHA KK

AI summary

The embodiments of the disclosure provide a policy mapping method and device and user equipment (UE). The method includes that: UE maps all policies or part of policies used in a first mobile communication system to a policy used in a second mobile communication system, the policies used in the first system including at least one of an access network discovery and selection policy (ANDSP) and a UE route selection policy (URSP).