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Time and margin constrained routing, spectrum, and restoration speed assignment in optical networks

  • US 10,686,543 B1
  • Filed: 03/05/2019
  • Issued: 06/16/2020
  • Est. Priority Date: 03/05/2019
  • Status: Active Grant
First Claim
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1. A controller for an optical network comprising:

  • a network interface configured to communicate to one or more nodes in an optical network that includes a plurality of nodes interconnected by a plurality of links;

    a processor communicatively coupled to the network interface; and

    memory storing instructions that, when executed, cause the processor toobtain information related to a plurality of services that require spectrum assignment with each service given a time-constraint T for restoration to a restoration path and each service on its home route given a margin-constraint X dB to tolerate transients caused by restoring channels,classify each of the plurality of services in terms of viable paths in the optical network, restoration speed each viable path can tolerate, and re-tunability,assign a home route and a restoration route, a restoration speed, and spectrum for each of the plurality of services based on priority, andassign the restoration route for a service to meet the time-constraint T and the margin-constraint X dB before selecting the home route.

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