Anycast PDU Session Routing With Dynamic DNAI Selection
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Solution Overview
Problem
Existing anycast service scenarios in 5G networks lack dynamic PDU session establishment methods that can optimally select service instances based on real-time network and computing metrics, leading to inefficient traffic routing and potential service quality issues.
Innovation Solution
A dynamic PDU session establishment method involving an Anycast Application Function (AF) that collects network and computing metrics, selects an optimal Data Network Access Identifier (DNAI) for PDU sessions, and dynamically updates routing paths based on current network conditions and UE location information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If static traffic influence rules are used for anycast service routing, then configuration simplicity is maintained, but traffic routing efficiency deteriorates due to inability to adapt to real-time network conditions
Solution Approach 1:
The patent transforms static traffic influence rules into dynamic rules that are automatically adjusted based on real-time network conditions. The system monitors network metrics continuously and updates routing rules dynamically, allowing the network to adapt to changing conditions while maintaining operational simplicity through automated processes.
Solution Approach 2:
The patent implements a feedback mechanism where network metrics are continuously collected, analyzed, and used to adjust traffic routing rules. The system monitors performance indicators and feeds this information back to the rule management system, which automatically optimizes routing decisions based on current network state, thereby improving routing efficiency without requiring manual reconfiguration.
2Productivity
If dynamic PDU session establishment with real-time metric monitoring is implemented, then traffic routing efficiency is improved, but system complexity increases
Solution Approach 1:
The patent creates a universal rule management system that handles multiple functions: collecting network metrics, analyzing performance data, generating routing rules, and updating configurations. This multi-functional system consolidates what would otherwise require separate components, managing complexity through integration while enabling dynamic routing optimization across the network.
Solution Approach 2:
The patent implements self-service mechanisms where the system automatically monitors its own performance, generates optimization rules, and applies configurations without external intervention. The network elements self-diagnose and self-optimize their routing behavior based on collected metrics, reducing the operational complexity burden on network operators while maintaining high routing efficiency.
3Stability of the object's composition
If static routing paths are used for anycast services, then network stability is maintained, but service quality deteriorates due to inability to adapt to network changes
Solution Approach 1:
The patent introduces dynamic rule updates that allow routing paths to adapt to changing network conditions while maintaining overall system stability. The system carefully manages transitions between routing states, ensuring that changes are made progressively and controllably, thus preserving network stability while improving service quality through adaptive routing decisions.
Solution Approach 2:
The patent implements feedback-controlled routing where network performance is continuously monitored and routing decisions are adjusted based on real-time conditions. The system receives feedback about network state and service quality, then automatically adjusts routing rules to maintain optimal performance, ensuring both stability and reliability through closed-loop control.
Data Source
AI summary
A method of establishing a dynamic PUD session for an anycast service by means of an Anycast Application Function (AF) includes: subscribing to a PDU session establishment event exposure notification for traffic targeting an anycast IP address; receiving a user plane management event exposure notification message including a UE address and optional UE location information via a Network Exposure Function (NEF) from a Session Management Function (SMF) determining that an AF notification trigger has been satisfied through the anycast IP address in accordance with a PDU session establishment request for an anycast IP address-based service of UE; selecting an optimal Data Network Access Identifier (DNAI) for the requested PDU session on the basis of currently monitored network and computer metrics and the UE location information; and transmitting the selected DNAI and routing information to the NEF through a preset message.