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US 7,079,767 B2Granted
Wavelength and/or subband assignment algorithm in all optical networks for minimal blocking
AssigneePTS Corporation
InventorsThuthuy Bach, Ashish Duggal
Life of this patent
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Abstract
A system and method for minimizing blocking in optical networks utilizes algorithms developed to reduce non-revenue generating OEO conversions as a result of blocking based on routing and wavelength and/or subband assignment. Demands are prioritized on a basis of optical reach, and regenerators required for overcoming optical reach limitations are strategically placed to overcome blocking.
Claims26
A resource allocation system for use with an optical communications system, comprising:
- an input module receptive of demands for system resources;
- a routing module operable to route the demands through an ordered set of optical switching nodes of the optical communications system;
- a prioritization module operable to perform a prioritization of the demands based on a comparison of an optical reach of the optical communications system and lengths of demand routes;
- and
- an assignment module operable to assign the system resources based on the prioritization.
2 more elements
A resource allocation method for use with an optical communications system, comprising:
- receiving information relating to demands for optical communications system resources, including receiving requirements for bandwidth that have a predetermined route through an ordered set of optical switching nodes of the optical communications system;
- prioritizing the demands based on a comparison of an optical reach of the optical communications system with a lengths of demand routes;
- and
- assigning the system resources based on said prioritizing.
1 more element
An optical communications system, comprising:
- first bandwidth assigned to first demands having a length not greater than an optical reach of the system;
- and
- second bandwidth assigned to second demands having a length greater than the optical reach, wherein the second bandwidth is assigned based on assignment of the first bandwidth;
- and
- regenerators assigned to links of the system based on said second assigned bandwidth, thereby simultaneously overcoming optical reach and blocking restrictions for the second demands,
- wherein network bandwidth is allocated in view of routes of demands through one or more ordered sets of optical switching nodes of the optical communications system.
3 more elements
Dependencies are inferred from the claim text.