Patent ID: 9485017
Filing Date: 2016-11-01
CPC Classification: H04B,H04J

Claim Text:
1. A method for monitoring optical performance in an optical data transmission network, wherein the optical data transmission network comprises a first router node, a second router node, and an optical data transmission line connecting the first router node with the second router node providing optical data transmission from the first router node to the second router node using at least two channels, each of the at least two channels using a predetermined wavelength, wherein the optical data transmission network comprises a plurality of amplifier nodes arranged in series along the optical data transmission line between the first router node and the second router node, wherein the second router node comprises a spare IP router interface, and wherein the method comprises: in a measurement step, determining, at the spare IP router interface, optical performance parameters of the at least two channels; in a transmission step subsequent to the measurement step, transmitting the determined optical performance parameters to a remote control unit; and in an analysis step subsequent to the transmission step, analyzing the transmitted optical performance parameters and determining whether to take a corrective action to improve optical performance of the at least two channels; wherein the analysis step further comprises: determining a minimum optical receive power level as well as a corresponding minimum optical receive power channel of the at least two channels, and determining a receive power range indicative of the distribution of the optical receive power levels of the at least two channels.