AMF Node Selecting SMF Based on AF Request for 5G MEC
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Solution Overview
Problem
Current 4G LTE networks are inadequate for supporting ultra-reliable and low-latency communications required for services like autonomous driving and virtual reality, due to insufficient data transmission speed and latency, necessitating a redesign of core networks for 5G mobile communications.
Innovation Solution
The proposed solution involves an Access and Mobility Management Function (AMF) node that selects a Session Management Function (SMF) node based on Application Function (AF) request information, triggering changes in the User Plane (UP) path, including deactivation and re-establishment of Protocol Data Unit (PDU) sessions, to enhance Quality of Experience (QoE) and enable Mobile Edge Computing (MEC) services in various network topologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If 4G LTE networks are used, then network coverage and basic connectivity are provided, but data transmission speed and latency are insufficient for advanced services
Solution Approach 1:
The patent changes the network architecture parameters by introducing a redesigned 5G core network with new network nodes (AMF, SMF, UPF) and modified signaling procedures. This enables higher data transmission speeds and lower latency through optimized packet routing and session management, while maintaining reliability through enhanced security and quality of service mechanisms.
Solution Approach 2:
The patent segments the core network into functionally independent nodes: Access and Mobility Management Function (AMF) for control plane, Session Management Function (SMF) for session control, and User Plane Function (UPF) for data forwarding. This segmentation allows each component to be optimized independently for speed and reliability requirements of specific services.
2Speed
If core networks are redesigned for 5G, then data transmission speed and latency are improved, but network complexity increases
Solution Approach 1:
The patent designs the 5G core network functions to be multi-functional and adaptable. The AMF, SMF, and UPF can serve multiple services and deployment scenarios through configurable parameters and protocols, reducing the need for entirely separate infrastructure for different 5G services and thereby managing complexity while achieving high performance.
Solution Approach 2:
The patent implements dynamic network resource allocation and flexible session management where the SMF can dynamically select UPF locations and adjust routing paths based on real-time service requirements. This dynamic approach allows the network to optimize performance for each service instance without requiring complex static infrastructure design.
3Adaptability or versatility
If dedicated SMF and UPF selection is enabled, then flexibility and quality of MEC services are improved, but selection process complexity increases
Solution Approach 1:
The patent incorporates feedback mechanisms where the AMF receives AF request information about desired service characteristics and uses this feedback to make informed SMF and UPF selection decisions. The system continuously monitors service quality and can trigger reselection if performance degrades, enabling flexible service adaptation through automated feedback-driven optimization rather than complex manual configuration.
Solution Approach 2:
The patent implements self-service capabilities where the SMF autonomously selects appropriate UPFs and configures user plane paths based on service requirements and network conditions. The system automatically manages service flexibility and adaptation without requiring complex external control, reducing operational complexity while maintaining high service quality and adaptability.
Data Source
AI summary
A disclosure of the present specification provides a method for operating an access and mobility management function (AMF) node for selecting a session management function (SMF) node. The method may comprise the steps of receiving a first message including application function (AF) request information from an AF node; selecting or reselecting an SMF on the basis of the AF request information; and transmitting a second message including the AF request information to the selected or reselected SMF.