5G UPF Packet Header Handling for Specialized Network Slicing
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Solution Overview
Problem
The 5G system lacks optimized packet header handling functions for specialized services, particularly for hyper-low latency and user-tailored network slicing, and there is no method to detect or add new packet headers in the uplink or downlink direction between the application function (AF) and the user plane function (UPF).
Innovation Solution
A user plane function (UPF) with a packet header handling function registers in a network repository function (NRF) through a service-based interface (SBI), and network functions (NFs) search for the UPF containing this feature, enabling packet header handling information to be provided by the UPF to session management functions (SMF) and application functions (AFs) through various interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If new packet header handling functions are added to support hyper-low latency and user-tailored network slicing, then service specialization capability is improved, but device complexity increases
Solution Approach 1:
The patent segments packet header handling into distinct operational modes (detect-only mode and detect-then-insert mode) and separates detection functions from insertion functions. This allows the UPF to handle different service requirements through modular functional blocks rather than a monolithic complex structure, thereby improving service specialization while managing complexity through functional decomposition.
Solution Approach 2:
The patent implements dynamic configuration of packet header handling behavior through configurable parameters and operational mode selection. The UPF can dynamically switch between detection-only mode and detect-then-insert mode based on service requirements, and dynamically adjust detection priorities and insertion strategies. This dynamic adaptability enables the system to specialize for different services without requiring complex static architectural changes.
2Adaptability or versatility
If packet header detection and insertion functions are implemented in the UPF, then packet header handling capability is improved, but processing time increases
Solution Approach 1:
The patent implements partial action by providing selective packet header handling based on detection priorities and operational modes. Not all packet headers are processed equally - the system can prioritize critical headers for inspection while allowing less critical headers to pass through with minimal processing. This selective processing approach enables enhanced packet header handling capability for specific services while minimizing overall processing time impact.
Solution Approach 2:
The patent maintains continuous packet forwarding while interspersing detection and insertion operations. Rather than stopping packet flow for complete header analysis, the system performs detection and insertion actions continuously as packets pass through the UPF, using efficient data structures and parallel processing where applicable. This continuous operation minimizes processing time while maintaining comprehensive packet header handling capability.
3Ease of operation
If the UPF registers packet header handling information in the NRF, then network function discoverability is improved, but system complexity increases
Solution Approach 1:
The patent uses the Network Repository Function (NRF) as an intermediary component that centralizes registration and discovery of packet header handling capabilities. Instead of requiring direct peer-to-peer knowledge of UPF capabilities across the network, the NRF serves as a mediator that stores registration information and provides discovery services. This intermediary approach improves network function discoverability while containing system complexity within a dedicated registration and discovery subsystem.
4Adaptability or versatility
If the UPF performs association setup with the SMF through the N4 interface, then session management capability is improved, but protocol complexity increases
Solution Approach 1:
The patent implements the N4 interface as a universal communication channel that handles multiple session management functions through a standardized protocol framework. The same N4 interface and associated protocols are used for packet header handling setup, QoS parameter configuration, and other session management tasks. This multi-functional approach improves session management capability while avoiding the need for separate specialized protocols for each function, thereby managing protocol complexity through universality.
Data Source
AI summary
Proposed are an apparatus and method for providing packet header handling information in wireless communication systems. The operation method for providing packet header handling information in a 5G system in a wireless communication system comprise registering, by a user plane function (UPF) having a packet header handling function, a packet header handling feature (PHHL) in a network repository function (NRF) through a service based interface (SBI), and searching, by a network function (NF), for the UPF containing the packet header handling Feature (PHHL) from the NRF through the SBI.