MA PDU Session PMF Binding for 5G QoS Optimization
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Solution Overview
Problem
The existing 4G LTE core networks are inadequate to support the high reliability and low latency requirements of 5G services, particularly for scenarios like autonomous driving and virtual reality, due to limitations in data transmission speed and network architecture.
Innovation Solution
A method for Multi-Access (MA) Protocol Data Unit (PDU) session management is proposed, involving Performance Measurement Function (PMF) binding requests and responses between User Equipment (UE) and User Plane Function (UPF) nodes, using Reflective Quality of Service (QoS) indications to optimize QoS flows for accurate performance measurement and traffic control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 4G LTE core networks are used, then existing network infrastructure is maintained, but high reliability and low latency requirements for 5G services cannot be met
Solution Approach 1:
The patent segments the core network into multiple functional units (AMF, SMF, UPF, PCF, UDM, NSSF) that can operate independently and be optimized for specific functions. This segmentation allows the network to simultaneously handle different service requirements with appropriate reliability and latency characteristics through specialized function handling.
Solution Approach 2:
The patent introduces a new network dimension by adding the NSSF (Network Slice Selection Function) that enables network slicing - creating virtualized network instances with different characteristics. This allows simultaneous support for high-reliability low-latency services (URLLC) and high-bandwidth services (eMBB) over the same physical infrastructure by selecting appropriate network slices.
2Adaptability or versatility
If multiple numerologies and frequency ranges are supported, then various 5G services can be accommodated, but network complexity increases
Solution Approach 1:
The patent implements universal function designs where each core network function (AMF, SMF, UPF, etc.) is designed to handle multiple service types and numerologies through standardized interfaces and procedures. The NSSF further enhances universality by providing a unified mechanism for selecting appropriate network slices across different service requirements, reducing the need for service-specific customizations.
3Measurement precision
If PMF binding requests are processed for each QoS flow, then accurate performance measurement is achieved, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by processing PMF binding requests selectively - only for QoS flows that require performance measurement, rather than for all QoS flows. The SMF determines which QoS flows need measurement based on service requirements, and only establishes PMF bindings for those specific flows, reducing unnecessary signaling overhead while maintaining measurement precision where needed.
Data Source
AI summary
Provided in one disclosure in the present specification is a multi-access (MA) protocol data unit (PDU) session method using user equipment (UE). The method can comprise a step of transmitting a first request message for a performance measurement function (PMF) binding request to a PMF layer of a user plane function (UPF) node on the basis of PMF address information about the UPF node included in measurement assistance information (MAI). The PMF binding request can be performed according to quality of service (QoS) flow. The method can comprise a step of receiving a PMF binding response message from the PMF layer of the UPF node. The PMF binding response message can include a reflective QoS indication (RQI).