vBNG User Plane Switchover for Uninterrupted Broadband Access
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Solution Overview
Problem
In broadband access networks, user traffic restoration after a user plane failure is slow, causing interruptions and affecting user experience.
Innovation Solution
A method and apparatus for seamless user plane migration by a vBNG-control plane, SDN controller, and user plane selection function to quickly switch user traffic to a backup user plane, minimizing downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user plane fault recovery requires user re-dialing, then system reliability is improved through reconnection, but user access time increases significantly
Solution Approach 1:
The system pre-establishes backup user plane resources and pre-configures traffic switching paths. When a user plane fault occurs, the control plane can immediately redirect traffic to the pre-prepared backup resources without requiring user re-dialing, thus resolving the contradiction between reliability and access time
Solution Approach 2:
The control plane acts as an intermediary that monitors user plane health status and automatically manages traffic switching between primary and backup user planes. This intermediary function enables seamless fault recovery while maintaining continuous user access, eliminating the need for time-consuming re-dialing procedures
2Productivity
If control plane manages multiple forwarding planes for flexible scheduling, then device utilization improves, but system complexity increases
Solution Approach 1:
The system segments control functions into a centralized control plane and distributes forwarding functions across multiple user planes. This segmentation allows the control plane to manage multiple forwarding planes independently, improving device utilization while maintaining manageable complexity through clear functional separation
Solution Approach 2:
The control plane is designed with multi-functional capabilities to handle traffic scheduling, fault detection, backup management, and resource allocation across multiple user planes. This universal control mechanism improves overall system productivity while avoiding the need for separate specialized controllers for each function, thereby controlling complexity
Data Source
AI summary
A broadband connection method includes a virtual broadband network gateway (vBNG)-control plane (CP) that receives first indication information from a user plane selection function (USF), where the first indication information indicates a second vBNG-user plane (UP) that replaces a first vBNG-UP when the first vBNG-UP is faulty. The vBNG-CP sends a user entry to the second vBNG-UP based on the first indication information, where the user entry is used by the second vBNG-UP to enable a user to access a network based on the user entry when the first vBNG-UP is faulty such that when a user plane is faulty, broadband access of a user is not interrupted, and the user can continue to access a network.