Inter-User Equipment Transfer via Proxy Mobile IP

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Solution Overview

Problem

Current Inter-User Equipment Transfer (IUT) technologies are limited to IMS-capable devices and require specific IMS infrastructure, making it difficult to perform media mobility across non-IMS capable wireless transmit/receive units (WTRUs) over general IP-based networks.

Innovation Solution

A method and apparatus utilizing Proxy Mobile IP (PMIP) or General Packet Radio Service (GPRS) tunneling protocol (GTP) to enable IUT across any IP-based network, allowing registration with a Local Mobility Anchor (LMA) for dedicated bearer creation and session information transfer between WTRUs, independent of IMS infrastructure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If IMS IUT is used, then media session transfer is enabled between IMS-capable WTRUs, but the system requires IMS infrastructure and is limited to IMS-capable devices

Engineering Contradiction:

Improvecompatibility with non-IMS capable WTRUsVSAvoidrequirement for IMS infrastructure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent introduces a Proxy Mobile IP (PMIP) or GPRS tunneling protocol (GTP) as an intermediary mechanism between the WTRU and the network. This intermediary enables media session transfer functionality without requiring the full IMS infrastructure, allowing non-IMS capable WTRUs to participate in IUT operations through standardized IP-based mobility protocols.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent makes the media session transfer framework universal by implementing it over general IP-based networks using PMIP or GTP protocols, which are widely supported across different network types and devices. This multi-functional approach allows the same framework to serve both IMS-capable and non-IMS capable WTRUs, eliminating the need for device-specific IMS capabilities.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If a dedicated bearer is created for the target device, then session information transfer is enabled, but network configuration complexity increases

Engineering Contradiction:

Improvesession continuityVSAvoidbearer management overhead

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The target WTRU autonomously creates the dedicated bearer upon receiving the IUT request, without requiring complex centralized bearer management. The WTRU uses its own mobility management capabilities to establish the bearer with the network, and the source session information is automatically associated with this new bearer, enabling session continuity through self-service mechanisms.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The target WTRU performs preliminary actions by pre-configuring itself to receive the transferred media session. The dedicated bearer is created in advance before the actual media flow transfer, and the WTRU prepares its reception capabilities ahead of time, ensuring seamless session transition without interruption.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS9392495B2Method and apparatus for inter-user device transfer (IUT) in a network based mobility domain

Publication Date: 2016.07.12 INTERDIGITAL PATENT HOLDINGS INC

AI summary

A method and apparatus for performing Inter-User Equipment Transfer (IUT) across any internet protocol (IP) based network. This framework allows for preparation, execution and completion of data transfer at a target device through registration with a Local Mobility Anchor (LMA) and receipt of an IUT request. The target device receives and stores an IP address or a source device. The IP address is used to transmit session information.