Control Plane Steering Bypass for Network Access Fault Recovery
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Solution Overview
Problem
In broadband networks with decoupled forwarding and control functions, faults in steering and user steering function network elements prevent terminal devices from accessing the network successfully.
Innovation Solution
A control plane network element directly controls terminal devices to send data packets through a first user plane network element when a fault occurs in the steering decision-making network element, bypassing the decision-making unit to ensure continuous network access, and implements user migration and rollback procedures to manage load balancing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the steering decision-making network element is used to steer traffic, then network traffic can be dynamically optimized, but network access fails when a fault occurs on the steering decision-making network element
Solution Approach 1:
The patent introduces a backup steering mechanism as an intermediary solution. When the primary steering decision-making network element fails, the backup mechanism takes over to maintain network access. This resolves the contradiction by providing a mediating path that preserves both traffic optimization capabilities and access reliability.
Solution Approach 2:
The patent implements fault detection and backup mechanism activation in advance before actual network access failures occur. By monitoring the health of the steering decision-making network element and pre-configuring backup paths, the system cushions against potential failures, ensuring continuous network access even when faults occur.
2Reliability
If the control plane network element directly controls data packet transmission bypassing the steering decision-making unit, then network access continuity is maintained during faults, but the steering function is compromised
Solution Approach 1:
The patent implements dynamic switching between normal steering mode and direct control mode. The control plane network element can adaptively change its operational state based on the health status of the steering decision-making network element. This dynamic approach allows the system to maintain reliability during faults while preserving steering functionality when conditions permit.
Solution Approach 2:
The patent changes the operational parameters of the control plane network element based on system conditions. When the steering decision-making network element is healthy, the system operates in normal steering mode with full adaptability. When faults are detected, parameters change to direct control mode, prioritizing access continuity. This parameter-based adaptation resolves the contradiction between reliability and adaptability.
Data Source
AI summary
In a process in which a terminal device accesses a network, if a control plane network element determines that a fault occurs on a steering decision-making network element, to ensure that the terminal device can continue to access the network, the control plane network element may directly control, without decision of the steering decision-making unit, the terminal device to send a data packet through a first user plane network element for a dial-up request.