5G Initial Attach Prioritization for Congested Network Access
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Solution Overview
Problem
Existing 5G wireless networks lack a method for prioritizing priority subscribers during initial attach procedures, leading to equal difficulties for priority users in connecting to the network during network congestion or overload.
Innovation Solution
Implement an initial attach prioritization system that utilizes the authentication server function (AUSF) to obtain subscriber priority from the unified data repository (UDR) and share it with network components, ensuring priority users receive high-quality service during initial attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing 5G implementations are used without initial attach prioritization, then network operations are simple and uniform, but priority subscribers cannot connect during network congestion or overload
Solution Approach 1:
The system performs preliminary actions by obtaining subscriber priority information from the UDR during the initial attach procedure before network congestion occurs. The AUSF retrieves and stores priority data in advance, enabling prioritized handling when congestion happens without requiring complex real-time decisions during the attach process
Solution Approach 2:
The AUSF acts as an intermediary between the UDR (which stores priority information) and the AMF (which handles attach requests). It mediates the information flow by obtaining priority data from the UDR and sharing it with the AMF, enabling coordinated prioritization without direct complex interactions between other network functions
2Productivity
If priority subscribers are treated equally with regular users during initial attach, then network procedures remain uniform and simple, but priority users experience connection failures during congestion
Solution Approach 1:
The system applies local quality by treating priority subscribers differently from regular users based on their subscription characteristics. The AUSF obtains and applies priority information specific to each subscriber, allowing differentiated handling (faster processing, higher success rate) for priority users while maintaining uniform procedures for regular users
Solution Approach 2:
The system changes the parameter of subscriber priority by obtaining priority information from the UDR and using it to modify the initial attach procedure. This parameter change enables the network to adjust processing priorities, resource allocation, and acceptance thresholds based on subscriber priority levels
3Reliability
If the AUSF obtains and shares subscriber priority information during initial attach, then priority subscribers receive guaranteed service, but additional network signaling and processing are required
Solution Approach 1:
The AUSF performs preliminary actions by obtaining subscriber priority information from the UDR during the initial attach procedure before congestion occurs. Priority data is retrieved and stored in advance, enabling rapid prioritized handling when needed without adding significant delay during critical moments
Solution Approach 2:
The priority information obtained by the AUSF is shared with the AMF and maintained throughout the attach procedure and subsequent network operations. This continuous availability of priority information ensures guaranteed service for priority subscribers across multiple stages without requiring repeated information retrieval
Data Source
AI summary
Systems, methods and devices are provided for subscriber prioritization upon initial attachment. Methods include receiving notification of an initial attach request from a wireless device at a core network component, obtaining a subscriber priority during the initial attach procedure, and sharing the subscriber priority with the network component responding to the initial attach request.