Optical Network Wavelength Grouping to Minimize Guard Bands
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In optical communication, providing guard bands to prevent signal quality deterioration reduces transmission capacity due to the need for a wider bandwidth.
Innovation Solution
A network management apparatus and method that control optical signals to be adjacent to each other within wavelength bands sandwiched between guard bands, reducing the guard bands between adjacent signals in an optical communication network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guard band is provided between optical signals to prevent signal quality deterioration, then signal quality is improved, but transmission capacity is reduced
Solution Approach 1:
The patent merges adjacent optical signals by removing guard bands between them, allowing multiple signals to be transmitted in closer spectral proximity. This combining approach enables signals that would traditionally require separation to instead share contiguous wavelength bands, thereby increasing transmission capacity while maintaining signal quality through coordinated control at add and drop points.
Solution Approach 2:
The patent changes the spectral parameter configuration by dynamically adjusting wavelength assignments and signal spacing. By modifying the wavelength band allocations and removing fixed guard band requirements, the system optimizes bandwidth utilization and increases transmission capacity while preserving signal integrity through adaptive parameter management.
2Reliability
If guard bands are provided between adjacent optical signals, then signal quality deterioration is prevented, but bandwidth utilization is reduced
Solution Approach 1:
The patent combines adjacent optical signals into contiguous wavelength bands by eliminating guard bands, thereby merging previously separated spectral resources. This merging increases bandwidth utilization by allowing more signals to occupy the available spectrum without overlapping, while signal quality is maintained through coordinated add/drop control mechanisms.
Solution Approach 2:
The patent optimizes bandwidth utilization by changing wavelength assignment parameters and signal spacing configurations. Through dynamic parameter adjustment, the system removes unnecessary spectral gaps and maximizes the efficient use of available bandwidth while preserving signal quality through adaptive management.
Data Source
AI summary
In an optical communication network including a plurality of communication apparatuses being connected by a transmission path transmitting WDM signal light in which a plurality of optical signals are performed wavelength division multiplexing, a network management apparatus includes an addition control unit that controls a first communication apparatus, when the first communication apparatus adds the optical signal to the WDM signal light, in such a way as to add, to be adjacent to each other, a plurality of the optical signals to be dropped by a second communication apparatus to a wavelength band being sandwiched between guard bands, and a drop control unit that controls the second communication apparatus, when the second communication apparatus drops the optical signal from the WDM signal light.