DWDM Flex-Grid Channel Shifting for Spectrum Gap Utilization
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Solution Overview
Problem
Optical transport systems face inefficiencies due to varying bandwidth consumption by different optical paths and channels, leading to gaps in the optical spectrum that reduce overall utilization, requiring system shutdowns for conventional optimization.
Innovation Solution
A computing system determines a network wavelength service frequency assignment to shift the center frequency of media channels, using processes like drift, bridge-and-roll-by-media-channel, or bridge-and-roll-by-optical-spectrum, to optimize spacings and utilize gaps in the optical spectrum without disrupting services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional optimization methods are used to optimize optical spectrum, then spectrum utilization is improved, but system shutdown is required which severely impacts services
Solution Approach 1:
The patent implements dynamic spectrum optimization by allowing media channels to shift their center frequencies in real-time during system operation. The computing system dynamically determines frequency assignments and controls optical signal devices to adjust channel positions, enabling continuous spectrum optimization without requiring system shutdown, thus resolving the contradiction between improving spectrum utilization and maintaining service continuity
Solution Approach 2:
The patent changes the frequency parameter of media channels to optimize spectrum utilization. By adjusting the center frequency of media channels through drift processes or bridge-and-roll mechanisms, the system reconfigures the spectral arrangement dynamically, allowing optimization while maintaining ongoing services and avoiding complete system shutdown
2Productivity
If media channels are shifted to optimize spectrum spacing, then spectrum utilization is improved, but channel spacing optimization complexity increases
Solution Approach 1:
The patent segments the spectrum optimization process into manageable components: identifying gaps in the optical spectrum, determining optimal frequency assignments for specific media channels, and executing shifts through controlled processes. This segmentation allows complex optimization to be broken down into discrete, controllable steps, reducing overall system complexity while improving spectrum utilization
Solution Approach 2:
The computing system acts as an intermediary that coordinates between optical signal devices and the optimization algorithm. It receives spectrum gap information, calculates optimal frequency assignments, and controls the actual frequency shifting operations, simplifying the overall system architecture by centralizing the optimization control function
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.