Master/Slave Optical Switching for Fiber Cut Recovery
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Solution Overview
Problem
Conventional optical fiber route diversity systems require manual intervention to switch between primary and diverse fiber paths, leading to prolonged service outages due to fiber cuts, which is detrimental to cable companies as it affects the reliability of high-speed internet, television, and communication services.
Innovation Solution
An optical switching system with a master module and slave modules that automatically switch between primary and diverse optical paths using optical couplers and switches, detecting signal levels to seamlessly reroute traffic in case of fiber damage, minimizing downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual switching is used to transfer signals from damaged fiber route to undamaged fiber route, then route diversity protection is implemented, but service downtime increases and reliability decreases
Solution Approach 1:
The optical switching system automatically detects fiber route failures and switches signals between primary and diverse paths without requiring manual operator intervention. The system monitors optical signal levels and autonomously activates the switching mechanism when a failure is detected, enabling self-service protection that eliminates downtime associated with manual switching.
Solution Approach 2:
The system continuously monitors optical signal levels on both primary and diverse fiber paths through optical couplers and feedback circuits. When a failure is detected on the primary path, the feedback mechanism triggers the controller to activate the optical switch and redirect signals to the diverse path, ensuring rapid automatic protection.
2Loss of time
If automatic optical switching is implemented, then service downtime is reduced, but device complexity increases
Solution Approach 1:
The optical switching system is divided into modular components including master and slave modules, each with dedicated functions for monitoring, control, and switching. This segmentation allows the complex functionality to be distributed across multiple simpler units that can operate independently and scale as needed.
Solution Approach 2:
Optical couplers serve as intermediary components that bridge the optical domains, enabling automatic detection and switching. These couplers facilitate the transfer of optical signals between different paths while maintaining signal integrity, simplifying the overall system architecture by providing a standardized interface for failure detection and signal routing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system ensures near-instantaneous switching between primary and diverse paths, reducing service interruptions and maintaining network availability by automatically rerouting optical signals, thus enhancing the reliability of fiber optic networks.
Implementation Method 1
an optical coupler for detecting an optical signal level provided to the master module receiver portion first port and providing a first electrical signal to a first input of the master module controller
Data Source
AI summary
A system and method is provided for controlling switching between multiple primary and diverse optical paths in an optical switching system. The system has a primary upstream optical path, a diverse upstream optical path, one or more primary downstream optical paths, and one or more diverse downstream optical paths. The method comprises the steps of monitoring a signal level of the primary upstream optical path, determining if the signal level of the primary upstream optical path is above a set threshold, and automatically switching both upstream and downstream paths from the primary optical paths to the diverse optical paths if the signal level of the primary upstream optical path is below the predetermined threshold.