UPF Header Handling Control for Dynamic Wireless Traffic
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional user traffic control methods in wireless communication systems are inadequate for handling complex application service requirements due to limited traffic processing capabilities, difficulty in interworking between application service providers and network operators, and static policy-based control, which hinders dynamic service adaptation.
Innovation Solution
The apparatus and method provide header handling control information from Application Function (AF) to Network Exposure Function (NEF) for flexible traffic control, enabling the Session Management Function (SMF) to generate rules for User Plane Function (UPF) to perform operations like detection, removal, and insertion of headers, with efficient reporting mechanisms to monitor events and reduce signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional packet routing and QoS management methods are used, then basic traffic control is achieved, but complex application service requirements cannot be met
Solution Approach 1:
The patent segments traffic control into multiple functional components: Application Function (AF) for service logic, Network Exposure Function (NEF) for interface management, Session Management Function (SMF) for session control, and User Plane Function (UPF) for actual traffic handling. This segmentation allows each component to specialize in specific tasks, enabling complex application service requirements to be met through coordinated action of simpler individual functions.
Solution Approach 2:
The patent introduces intermediary functions between application service providers and network operators. The NEF acts as an intermediary that exposes network capabilities to AFs, while the SMF serves as an intermediary that translates policy requirements into executable N4 rules for UPFs. These intermediaries enable complex traffic control without requiring direct complex interactions between all system components.
2Adaptability or versatility
If static policy-based traffic control is used, then network stability is maintained, but dynamic service adaptation is hindered
Solution Approach 1:
The patent implements dynamic traffic control through the AF-NEF-SMF-UPF service-based architecture, where policies can be dynamically adjusted based on real-time service requirements. The SMF can modify N4 rules between sessions, and the UPF can adapt header handling operations dynamically. This dynamic capability allows the system to respond to changing service demands while maintaining overall stability through structured policy management.
Solution Approach 2:
The patent enables dynamic adaptation by allowing parameter changes in traffic handling rules. The SMF can modify N4 session parameters, and the UPF can change header handling parameters (detection, removal, replacement, insertion) based on service requirements. This parameter flexibility enables dynamic service adaptation without requiring complete policy rewriting, maintaining stability while achieving adaptability.
3Productivity
If basic header information forwarding rules are used, then simple routing is achieved, but detailed traffic processing capabilities are limited
Solution Approach 1:
The patent makes the UPF universally capable of performing multiple header handling operations (detection, removal, replacement, insertion) on various protocol headers (IPv4, IPv6, TCP, UDP, etc.). This multi-functional capability allows a single UPF to handle diverse traffic processing requirements without requiring separate specialized components for each operation type, thereby increasing productivity while managing complexity through consolidation.
Solution Approach 2:
The patent implements preliminary action by pre-configuring header handling rules in the UPF through N4 rules established by the SMF. The UPF stores these rules and can execute them automatically without requiring real-time complex decision-making. This preliminary rule setup enables detailed traffic processing capabilities while reducing operational complexity during actual traffic handling.
4Adaptability or versatility
If existing SFC approaches are used, then traffic forwarding to function nodes is achieved, but interworking between application service providers and network operators is limited
Solution Approach 1:
The patent introduces the NEF as an intermediary layer that standardizes the interface between application service providers (AFs) and the core network. The NEF translates diverse AF service requirements into standardized network policies that the SMF and UPF can execute. This intermediary layer enables robust interworking between different service providers and network operators while managing complexity through standardization.
Solution Approach 2:
The patent creates a universal service-based architecture where the AF-NEF-SMF-UPF chain can handle various types of traffic and service requirements through a common framework. The same architectural elements can support different application services, making the system universally adaptable to various interworking scenarios without requiring provider-specific complex configurations.
Data Source
AI summary
A wireless communication system provides header handling control for user traffic based on Application Function (AF) requests. A Network Exposure Function (NEF) receives traffic header handling control information from an AF and transmits it to a Session Management Function (SMF) via a Policy Control Function (PCF). The SMF generates header handling control rules based on the received information and sends them to a User Plane Function (UPF) through an N4 interface. The UPF processes user traffic header handling according to the rules, performing operations including header detection, removal, replacement, and insertion. Processing results are transmitted directly to the SMF, NEF, and/or AF through a Nupf_EventExposure service interface. The system enables flexible user traffic header control and efficient event reporting with reduced signaling overhead.