DualSteer MA-PDU Session for Mobile Network QoS
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Solution Overview
Problem
Current wireless communication systems lack the flexibility to efficiently split, steer, and duplicate Service Data Flows (SDFs) over multiple 3GPP access links, particularly across different Mobile Networks, limiting the ability to optimize Quality of Service (QoS) and network resource utilization.
Innovation Solution
The implementation of DualSteer functionality, which enables a Wireless Transmit-Receive Unit (WTRU) to selectively register with both a Primary Mobile Network (PMN) and a Secondary Mobile Network (SMN), establishing Multi-Access Protocol Data Unit (MA-PDU) sessions with dual connectivity, allowing for dynamic steering of traffic across two 3GPP access legs based on QoS requirements and network conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a WTRU establishes a MA-PDU session with dual connectivity across two Mobile Networks, then QoS and network resource utilization are optimized, but the device complexity and registration procedures increase
Solution Approach 1:
The patent segments the MA-PDU session establishment process into distinct phases: first establishing connectivity with the Primary Mobile Network (PMN), then selectively adding the Secondary Mobile Network (SMN) based on QoS requirements. This segmentation allows the WTRU to maintain basic functionality with simple single-network connectivity while enabling enhanced dual-network functionality only when needed, thereby optimizing QoS without permanently increasing device complexity.
Solution Approach 2:
The patent implements dynamic network selection where the WTRU can flexibly switch between single-network and dual-network modes based on real-time QoS requirements and network conditions. The dual connectivity configuration is not static but dynamically activated when service demands require enhanced reliability or throughput, allowing the system to adapt its complexity level to match operational needs.
2Adaptability or versatility
If a WTRU selectively registers with both PMN and SMN for dual connectivity, then traffic steering flexibility improves, but the registration and session establishment procedures become more complex
Solution Approach 1:
The patent applies preliminary action by having the WTRU first establish registration and connectivity with the Primary Mobile Network before considering secondary network addition. This sequential approach simplifies the overall procedure by breaking down the complex dual-registration process into manageable steps, where each step builds upon the previous successful registration, reducing the cognitive and procedural complexity for the device.
Solution Approach 2:
The patent implements local quality by applying different registration and connection strategies to different network contexts. The WTRU uses standard single-network registration procedures for basic operation, and only invokes the more complex dual-registration procedure when specific QoS requirements or network conditions warrant it. This localized application of complexity reduces overall procedure burden while maintaining traffic steering flexibility where needed.
3Productivity
If dualSteer functionality is implemented across two different Mobile Networks, then network resource utilization improves, but the architecture and procedures become more complex
Solution Approach 1:
The patent implements universality by designing the MA-PDU session architecture to handle both single-network and dual-network scenarios through a unified framework. The same core session management procedures can operate with one or two networks attached, allowing the system to provide dual-network resource utilization benefits without requiring entirely separate architecture for each mode. This multi-functional design optimizes network resource usage while controlling architecture complexity through code reuse and unified logic.
Data Source
AI summary
An embodiment of a method for implementing by a Wireless Transmit-Receive Unit (WTRU) includes receiving, from a Primary Mobile Network (PMN), information related to a Secondary Mobile Network (SMN), selecting the PMN in response to the information related to the SMN, registering to the selected PMN, and, in response to a trigger, and based on a factor related to Quality of Service (QoS) and on the information related to the SMN, requesting establishment of a Multi-Access Protocol Data Unit (MA-PDU) session having DualSteer functionality and with an access leg over the registered PMN and with another access leg.