Patent ID: 8401385
Filing Date: 2013-03-19
Classification: H04J,H04Q

Abstract:
1. A large optically switched communication network comprising: (A) a plurality of more than 20 area code nodes; (B) a network of optical fibers; (C) a plurality of dense wavelength division multiplexing components for providing at least 100 wavelength communication channels through each optical fiber in said network of optical fibers; (D) a plurality of processor controlled optical switches located at each of said area code nodes; (E) a plurality of electro-optical modulators to modulate user data onto said network of optical fibers at wavelengths within selected wavelength communication channels; (F) a plurality of processors, said plurality of processors being programmed with a magic square routing algorithm for controlling said optical switches to permit a plurality of single wavelength communication links through said network of optical fibers from each of said plurality of area code nodes to every other one of said area code nodes; and (G) at least one optical signal generator for generating a plurality of narrow band optical reference frequency signals and a plurality of optical sub-frequency signals, said optical sub-frequency signals defining each of said at least 100 wavelength communication channels; wherein each communication link in each of said communication channels from each area code node to every other area code node within the network is routed without a change in wavelength and without optical-electrical optical conversion; and wherein said magic square routing algorithm is an algorithm adapted to utilize a requirements matrix and an allocation matrix in order to permit assignments of wavelength communication channels on a sub-second time scale.