K-alternate Channel Selection for the Routing, Wavelength Assignment and Spectrum Allocation in Flexible Optical WDM Networks
AssigneeNEC Laboratories America, Inc.
InventorsAnkitkumar Patel, Philip Nan Ji
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Abstract
A method implemented in an optical flexible wavelength division multiplexing FWDM network includes finding a first channel out of available channels with sufficient spectrum on a given route out of available channels in an optical FWDM network; finding a second channel at a lower wavelength out of the available channels for minimizing total spectrum on the given route; selecting a channel out of the available channels on K-distinct shortest routes; and finding line rates of channels using a predetermined channel selection.
Claims7
A method implemented in a communications system including an optical flexible wavelength division multiplexing FWDM network, and method comprising the steps of:
- finding an optimal set of line rates for a requested data rate of each connection in said FWDM using a channel selection for a total spectrum requirement for said set of line rates that is minimal;
- determining available channels with sufficient spectrum for each said connection in a given set of said each connection in a specific order;
- ascertaining K-distinct shortest routes for each said connection;
- acquiring spectrum availability information for each said K-distinct routes using said spectrum availability information of all links along a respective route of said K-distinct routes;
- and
- selecting, among said K-distinct routes, a route having an available channel at a lowest wavelength so that all said connections are confined to lowest available wavelengths, thereby minimizing amount of spectrum needed for communication in said FWDM network.
A method implemented in an optical flexible wavelength division multiplexing FWDM network, said method comprising the steps of:
- finding a first channel out of available channels with sufficient spectrum on a given route out of available channels in an optical FWDM network;
- finding a second channel at a lower wavelength out of said available channels for minimizing total spectrum on said given route;
- selecting a channel out of said available channels on K-distinct shortest routes;
- and
- finding line rates of channels using a predetermined channel selection.
Dependencies are inferred from the claim text.