Patent ID: 9137590
Filing Date: 2015-09-15
Classification: H04J,H04L,H04Q

Abstract:
1. A method comprising the steps of: generating, by circuitry of a transmit node, a link state advertising message conforming to a Generalized Multiprotocol Label Switching (GMPLS) routing protocol, the link state advertising message being associated with a TE Link between a transmit node and a receive node in a network, the transmit node supplying a plurality of optical signals, each of which having a plurality of frequencies, the frequencies being allocated among a plurality of spectral portions such that the plurality of spectral portions are grouped into a plurality of frequency slots, the link state advertising message including information indicative of a number of spectral portions, which correspond to frequencies of selected ones of the plurality of optical signals, said selected ones of the plurality of optical signals being available to carry data from the transmit node to the receive node; and transmitting the link state advertising message from the transmit node to the receive node; and establishing a label switched path in accordance with the number of the plurality of spectral portions, wherein the link state advertising message further comprises Minimum and Maximum Slot Width fields including information indicative of a range of minimum and maximum number of spectral portions.