DWDM Flex Grid Frequency Shifting to Fill Optical Spectrum Gaps
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Solution Overview
Problem
Optical transport systems face inefficiencies in utilizing the entire available optical spectrum due to varying bandwidth requirements and gaps in the spectrum, which conventional optimization methods require shutting down the system, disrupting services.
Innovation Solution
A method and system for optimizing optical frequency spectrum in DWDM flex grid systems by shifting the center frequency of media channels to fill gaps and optimize spacings using computing systems and optical signal devices, employing processes like drift, bridge-and-roll-by-media-channel, and bridge-and-roll-by-optical-spectrum, without disrupting services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional optimization methods are used to optimize optical spectrum utilization, then spectrum efficiency is improved, but system service continuity deteriorates due to required shutdowns
Solution Approach 1:
The system performs preliminary actions by establishing backup media channels and pre-configuring frequency assignments before optimization is needed. The computing system calculates optimal frequency assignments in advance and prepares the system for seamless transitions, allowing optimization to occur without service disruption through planned frequency shifts of media channels.
2Productivity
If media channels are shifted to fill spectrum gaps and optimize spacings, then spectrum utilization is improved to nearly 100%, but system complexity increases due to frequency reassignment processes
Solution Approach 1:
The computing system acts as an intermediary that automatically calculates and determines optimal frequency assignments for media channels. It receives spectrum gap information, performs optimization calculations, and generates frequency reassignment plans that are then executed by the optical signal devices, reducing the complexity burden on the overall system by centralizing the intelligence in a dedicated control system.
Solution Approach 2:
The system creates copies of frequency assignment plans and channel configurations during the optimization process. Backup media channels are established with copied configurations before frequency shifts are implemented, allowing the system to replicate successful frequency assignments and maintain service continuity while optimizing spectrum utilization.
Data Source
AI summary
Novel tools and techniques are provided for implementing optical frequency spectral optimization in dense wavelength division multiplexing (“DWDM”) flex grid systems. In various embodiments, based on a determination that one or more gaps of optical spectrum exist in a range of optical spectrum that contains one or more media channels that support transmission of corresponding one or more first signals, a computing system may determine a network wavelength service frequency assignment for shifting frequency of at least one media channel among the one or more media channels to optimize one or more spacings among the one or more media channels in the range of optical spectrum for supporting transmission of one or more second signals; and may cause one or more optical signal devices to shift a center frequency of each of the at least one media channel, based on the determined network wavelength service frequency assignment.