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US 6,549,312 B2Granted
Method for designing optical filter cards
AssigneeSycamore Networks, Inc.
InventorsPaolo Narvaez, Naimish Patel, Farzana I. Khatri, Murat Azizoglu, Kayi Lee
Life of this patent
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Abstract
A method is provided for optical filter card design that facilitates a relatively efficient filter assignment algorithm solution resulting in a filter design that reduces a probability of unnecessary wavelength regenerations.
Claims23
A method for designing optical filter cards to arrive at an optical filter card arrangement, comprising the steps of:
- providing a plurality of optical wavelength filters for filtering predetermined optical wavelengths disposed on a plurality of filter cards;
- determining which of said optical wavelengths are filtered by each of said optical wavelength filters;
- designating correlations between optical wavelengths filtered by each of said optical wavelength filters, wherein for a given wavelength, the correlation between all wavelengths that share an optical filter card with the given wavelength is minimized to arrive at said optical filter card arrangement.
An optical filter node, comprising:
- a plurality of optical filters arranged into a plurality of filter cards, wherein each of said plurality of optical filter cards is optimized to contain predetermined groupings of optical filters, wherein the number of groupings is predetermined in a manner that a distance in a filter chain graph separating each of the optical filters from each other is minimized.
A method for designing optical filter cards, comprising the steps of:
- representing a plurality of wavelength filters in a filter chain graph;
- establishing correlations between proximal wavelengths by indicating such correlation on said filter chain graph;
- and
- adding additional correlations between distal wavelengths, wherein a distance in the filter chain graph separating each of the wavelength filters from each other is maximized to design the optical filter cards.
1 more element
A method for designing optical filter cards, comprising the steps of:
- representing a plurality of wavelength filters in a filter chain graph;
- establishing correlations between proximal wavelengths by indicating such correlation on said filter chain graph;
- and
- adding additional correlations between distal wavelengths, wherein a predetermined number of rings are drawn around different combinations of filters on said filter chain graph to indicate correlations between the wavelength filters and wherein each ring creates an optical filter card.
1 more element
Dependencies are inferred from the claim text.