Optical Protection Module Over-Modulation for Management Channel Elimination
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Solution Overview
Problem
Existing optical network protection mechanisms require separate ancillary channels for management, testing, and maintenance, which consume valuable resources and bandwidth.
Innovation Solution
Optical protection modules use over-modulation of WDM signals at lower frequencies to communicate management, testing, and maintenance information across optical fiber sections, eliminating the need for dedicated ancillary channels by integrating these functions into the optical protection modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate ancillary channels are used for management, testing, and maintenance of protection functions, then communication reliability is improved, but resource consumption and device complexity increase
Solution Approach 1:
The patent combines management, testing, and maintenance communication functions with the existing WDM signal transmission by using over-modulation techniques. The control messages are embedded in the optical signals already present in the fiber, eliminating the need for separate ancillary channels and reducing device complexity while maintaining communication reliability.
Solution Approach 2:
The WDM optical signals serve dual purposes: carrying data traffic and conveying management/control information for protection functions. By making the optical signals universal carriers for both data and control purposes, the system eliminates dedicated ancillary channels and reduces overall system complexity.
2Adaptability or versatility
If separate ancillary channels are used for management, testing, and maintenance, then communication capability is improved, but resource consumption increases
Solution Approach 1:
The patent merges control communication functionality into the existing WDM optical signals using over-modulation. This allows management, testing, and maintenance messages to be transmitted alongside data traffic in the same fiber resources, eliminating the need for additional ancillary channels and reducing resource consumption.
3Quantity of substance
If over-modulation is used to communicate management information, then resource consumption is reduced, but signal interference risk increases
Solution Approach 1:
The patent applies partial modulation by over-modulating only specific portions of the optical signal at lower frequencies to embed control information, rather than fully modulating the entire signal. This selective approach allows control messages to be transmitted while minimizing interference with the primary data signal.
Solution Approach 2:
The over-modulation technique uses periodic variations at lower frequencies to encode control information within the optical signal. This periodic modulation approach allows control messages to be transmitted in a structured manner that minimizes interference with the higher-frequency data transmission.
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
This approach reduces resource consumption and allows efficient communication for protection operations without interfering with normal signal channels, enhancing fault detection and management efficiency while minimizing additional equipment requirements.
Implementation Method 1
over-modulating optical signals from the optical protection module at frequencies much lower than those of the data to communicate a state of management, testing and maintenance to the remote optical protection module
Data Source
AI summary
An interface between a network component and an optical fiber section communicates with a remote interface and a remote network component at an opposite end of the optical fiber section through over-modulation of optical signals sent between the interfaces and network components. The over-modulation is at frequencies much lower than the ordinary modulation of the optical signals. The over-modulation allows communication between the interfaces for performing management, testing and maintenance operations and permits superior detection of faults in the optical fiber section.