Patent ID: 9054829
Filing Date: 2015-06-09
Classification: H04J

Abstract:
1. A method for spectrum-aware rate selection comprising the steps of: i) finding by a signal processor a set of channels based on spectrum availability information such that the total required spectrum for a requested data rate of a traffic demand is minimized in a wavelength division multiplexing optical network having a physical network topology with a set of Reconfigurable Optical Add Drop Multiplexer (ROADM) nodes and a set of fiber links connecting a pair of nodes, which includes ii) finding routes and spectral islands along optical network routes connecting source and destination nodes while observing spectral continuity and wavelength continuity responsive to an auxiliary graph based approach; iii) finding available spectral islands in the optical network along links in a single scan of spectrum availability profiles; and iv) finding a route which maximizes a minimum width of a spectral island along the route responsive to a Max-Min Weight procedure.