Home PCRN Roaming Session Termination
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Solution Overview
Problem
Current telecommunications networks face challenges in efficiently managing and terminating roaming sessions across different networks due to complex roaming agreements and dual core architectures, leading to difficulties in session management and charging when changes occur in roaming relationships.
Innovation Solution
A method involving a home policy and charging rules node (PCRN) and a visited PCRN that coordinates with each other to identify and terminate sessions on both home and visited networks by receiving change in roaming partner messages, marking sessions for termination, and sending appropriate messages to enforce policy and charging control rules across IP-CAN and S9 sessions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If roaming sessions are maintained across multiple networks with complex roaming agreements, then network coverage and service availability are improved, but session management complexity and charging accuracy deteriorate when roaming relationships change
Solution Approach 1:
The system performs preliminary actions by proactively identifying and terminating roaming sessions at the home PCRN when a roaming partner is deleted or roaming agreement is removed, before the user experiences service disruption. This prevents the complexity of managing stale sessions across multiple networks by clearing them in advance at the source.
Solution Approach 2:
The system implements feedback mechanisms where the home PCRN receives notifications about roaming partner changes and automatically responds by identifying and terminating affected sessions. This closed-loop feedback ensures session management remains synchronized with current roaming agreements, reducing manual intervention complexity.
2Adaptability or versatility
If dual core architecture is used to support both circuit-switched and packet-switched services, then service functionality is improved, but network complexity and session termination difficulty worsen
Solution Approach 1:
The system segments session management functions by network type, with the home PCRN specifically handling IP-CAN session identification and termination for packet-switched roaming services. This segmentation allows the dual core architecture to operate independently in each domain while maintaining overall system manageability through specialized handling of each session type.
3Duration of action of stationary object
If roaming sessions are not actively terminated when agreements change, then service continuity is maintained, but charging accuracy and network quality deteriorate
Solution Approach 1:
The system performs preliminary termination of roaming sessions at the home PCRN when roaming agreements are removed, preventing inaccurate charging for services that are no longer permitted. This proactive approach ensures charging records reflect only authorized services, maintaining precision while managing the transition gracefully.
Data Source
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AI summary
Various exemplary embodiments relate to a method performed by a policy and charging rules node (PCRN) for processing a change in a status of a roaming partner, the method including: receiving, at the PCRN, a message indicating a change in a status of the roaming partner; identifying roaming subscriber sessions associated with the roaming partner; determining home based roaming subscriber sessions among the identified subscriber sessions; marking the determined home based roaming subscriber sessions for termination; and sending a termination message to a policy and charging enforcement node for the determined home based roaming subscriber sessions.