Patent ID: 9660756
Date: 2017-05-23
CPC Classifications: H04J,H04Q

Claim:
1. A method, in an Optical Network Element, ONE, node, for establishing multiple spectral routing in an optical transport network, the method comprising: receiving, from a Path Computation Engine, PCE, a Split-Spectrum Label, SSL, said SSL comprising a plurality of entries and a plurality of definitions for spectral slots, wherein each entry defines a spectrum slot comprising an absolute starting and an absolute ending frequency allocation and wherein a first field of the SSL is labelled as grid; and establishing a plurality of optical routes corresponding to a single wavelength connection in the optical transport network, wherein each optical route corresponds to one spectrum slot defined by a respective entry, of the plurality of entries, of the received SSL, wherein at least a sub-set of non-contiguous spectrum slots, described by a corresponding sub-set of the plurality of entries, comprise different spectral widths, and wherein at least a sub-set of the non-contiguous spectrum slots that comprise different spectral widths are spatially non-adjacent, wherein the absolute starting and absolute ending frequency allocation of each respective spectrum slot is associated with a ΔF that is less than 3.125 GHz.