Optical Dispersion Compensation via Backup Channel Copying
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Solution Overview
Problem
In high-speed optical communication systems, the slow regulation of dispersion compensation values in backup channels leads to delayed protection switching due to non-linear relationships and external environmental changes, hindering quick service switching.
Innovation Solution
A method and device that receive and compensate dispersion compensation values across different wavelengths, allowing for real-time regulation of dispersion in both main and backup paths using the same service channel, ensuring optimal dispersion status during protection switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dispersion compensation value is regulated continuously according to quality of service signals, then dispersion compensation accuracy is improved, but switching time increases due to non-linear regulation process
Solution Approach 1:
The patent applies preliminary action by pre-regulating the dispersion compensation value in the backup channel before protection switching occurs. The system continuously monitors the working channel's dispersion compensation value and pre-configures the backup channel with matching parameters, so that when switching is needed, the backup channel is already optimized and ready for immediate service restoration without undergoing time-consuming regulation during the switch.
Solution Approach 2:
The patent uses copying by transferring the dispersion compensation value from the working channel to the backup channel. The system copies the regulation results from the actively monitored working channel and applies them to the standby backup channel, eliminating the need for the backup channel to independently perform time-consuming quality detection and regulation cycles.
2Adaptability or versatility
If dispersion compensation is performed separately in main and backup channels, then channel independence is maintained, but regulation time increases during protection switching
Solution Approach 1:
The patent applies merging by combining the dispersion compensation control of the main and backup channels. Instead of maintaining completely independent regulation systems, the system merges the control by having the backup channel adopt the working channel's dispersion compensation value, creating a coordinated approach that maintains operational independence while sharing regulation intelligence to reduce switching time.
3Reliability
If feedback regulation mechanism is used in each channel, then system reliability is improved, but complexity of regulation process increases
Solution Approach 1:
The patent applies universality by making the dispersion compensation value regulation mechanism serve multiple functions. The same regulation value detected in the working channel is universally applied to both the working channel itself and the backup channel, allowing a single regulation process to ensure optimal performance in either channel depending on which is active, thereby reducing overall system complexity while maintaining reliability.
Data Source
AI summary
A dispersion compensation method and a dispersion compensation device in an optical communication system are provided. The method mainly includes the following steps. A dispersion compensation value transmitted through a working path at a second wavelength is received through a non-working path at a first wavelength in an optical communication system. The non-working path at the first wavelength and the working path at the second wavelength use the same service channel. Dispersion in the non-working path at the first wavelength is compensated according to the dispersion compensation value. Therefore, no matter the working path is a main path or a backup path, the dispersion compensation value on the non-working path can be accurately regulated in time, such that the dispersion of the working path reaches an optimal status each time after the protection switching occurs to the service, thereby ensuring the fast switching of the service.