Patent ID: 8625995
Filing Date: 2014-01-07
Classification: H04J,H04Q

Abstract:
1. A method of signal power based routing in a Wavelength Division Multiplexed all-optical network in which optical nodes are linked together by optical fibers carrying communication channels of separate wavelengths (λ 1 , λ 2 , . . . λ k ), comprising the steps of: setting up a model for the all-optical network in which a wavelength graph contains vertices (V) and directed edges (A), a part of the edges (A calculating an objective function expressing total routing cost and total signal power of the channels, the objective function being defined to use a constant (α) for expressing a tradeoff between minimal total routing cost and minimal total signal power of the channels, and individually tuning a signal power of the channels with Variable Optical Attenuators so that the objective function is minimized.