Dual-Steer PDU Session Switching Using PMF Measurements

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Solution Overview

Problem

Existing wireless communication systems lack efficient mechanisms for dynamically switching between different wireless networks based on performance management function (PMF) measurements, leading to suboptimal network utilization and user experience.

Innovation Solution

A wireless transmit/receive unit (WTRU) is equipped to perform PMF measurements and, based on certain criteria, initiate the establishment of a second PDU session over a second wireless network, leveraging PMF measurement configurations and local radio signal measurements or explicit PMFP commands.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the WTRU continuously monitors network performance and dynamically establishes new PDU sessions, then network switching efficiency and user experience are improved, but device complexity and signaling overhead increase

Engineering Contradiction:

Improvenetwork switching efficiencyVSAvoiddevice complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The network provides PMF measurement configuration information to the WTRU in advance, including measurement parameters, thresholds, and reporting conditions. This preliminary configuration enables the WTRU to perform measurements without complex real-time decision logic, reducing device complexity while maintaining efficient network switching capability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces a standardized PMF measurement mechanism as an intermediary between the WTRU and network. This intermediary framework handles the complexity of performance monitoring and session management, allowing the WTRU to focus on executing predefined measurement and reporting tasks rather than implementing complex switching algorithms

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If the WTRU performs frequent PMF measurements and establishes new PDU sessions based on performance criteria, then network resource utilization is optimized, but signaling overhead and network load increase

Engineering Contradiction:

Improvenetwork resource utilizationVSAvoidsignaling overhead

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The WTRU performs PMF measurements selectively based on configured thresholds and triggers rather than continuously. Measurements are initiated only when performance criteria are met or degradation is detected, reducing unnecessary signaling while maintaining adequate network resource optimization

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system implements feedback-based measurement triggering where the WTRU monitors performance metrics and initiates measurements or session establishment only when predefined thresholds are crossed. This feedback mechanism reduces signaling overhead by eliminating measurements during stable network conditions while maintaining responsiveness to performance degradation

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20260046960A1Methods, architectures, apparatuses and systems for dualsteer devices

Publication Date: 2026.02.12 INTERDIGITAL PATENT HOLDINGS INC

AI summary

Wireless transmit/receive unit (WTRU) methods and systems are provided. A WTRU transmits a request to establish a first protocol data unit (PDU) session over a first wireless network and receives, from the first wireless network, information for triggering a performance management function (PMF) measurement for the first PDU session. The WTRU determines to perform the PMF measurement based on the information and performs the PMF measurement to obtain a parameter associated with the PMF measurement. The WTRU further determines whether the parameter satisfies at least one criterion and, in response to determining that the parameter satisfies the at least one criterion, transmits a request to establish a second PDU session over a second wireless network.