Visited PCF Mediation for Timely Roaming EAS Updates
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Solution Overview
Problem
Inefficient edge computing when a UE roams between roaming and home networks due to inefficiencies in the communication process between the visited and home public land mobile networks.
Innovation Solution
The visited PCF requests notification of edge application server (EAS) information updates to the visited unified data repository on behalf of the home PCF, ensuring efficient delivery of updated EAS information to UEs roaming in the visited network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the home PCF directly manages EAS information for roaming UEs, then information accuracy is maintained, but communication complexity and processing time increase between visited and home networks
Solution Approach 1:
The visited PCF acts as an intermediary between the visited UDR and home PCF. It subscribes to EAS information updates on behalf of the home PCF, receives notifications from the visited UDR, and forwards them to the home PCF. This mediator role eliminates the need for direct complex communication between home PCF and visited UDR, reducing network complexity while maintaining information accuracy.
Solution Approach 2:
The visited PCF performs preliminary action by proactively subscribing to EAS information updates in the visited UDR before any actual update occurs. This advance subscription ensures that when EAS information changes, the visited PCF is already positioned to receive and forward the updates immediately, improving information update efficiency without adding communication complexity at the moment of update.
2Speed
If the visited PCF subscribes to EAS information updates in the visited UDR, then information delivery speed improves, but the subscription management complexity increases
Solution Approach 1:
The visited PCF performs self-service by autonomously managing its own subscription to EAS information updates in the visited UDR. It independently subscribes, receives notifications, and forwards them without requiring complex external coordination. This self-service approach simplifies subscription management while enabling fast information delivery.
3Productivity
If EAS information is updated in real-time for roaming UEs, then edge computing efficiency improves, but network signaling overhead increases
Solution Approach 1:
The solution merges the subscription management function into the visited PCF, combining multiple operations (subscription, notification reception, and forwarding) into a single centralized entity. This consolidation enables real-time EAS information updates to roaming UEs, improving edge computing efficiency while reducing overall network signaling overhead by eliminating redundant communication paths.
Data Source
AI summary
A disclosure of the present specification provides a method for performing, by a visited public land mobile network-policy control function (V-PCF), communication using edge computing. The method comprises the steps of: establishing UE policy association with a home public land mobile network-policy control function (H-PCF); receiving a first subscription message from the H-PCF; and transmitting a second subscription message to a visited public land mobile network-unified data repository (V-UDR). The first subscription message is a message that requests a notification, according to edge application server (EAS) information being updated or modified, the second subscription message is a message that requests a notification, according to the EAS information being updated or modified, the second subscription message is based on the first subscription message, and the EAS information may be information that is generated by an application function (AF) and transmitted to the V-UDR.