Patent ID: 9225459
Filing Date: 2015-12-29
Classification: H04B,H04J

Abstract:
1. An optical transmission system, comprising: optical transmission apparatuses configured to transmit wavelength-division multiplexed light signals via lightpaths, each of a pair of optical transmission apparatuses includes a conditioning unit configured to adjust the optical intensities of channels included in the wavelength-division multiplexed light signal, and one or more first processors configured to control, based on a notified conditioning level, the conditioning unit; and a managing apparatus configured to manage the pair of the optical transmission apparatuses, the managing apparatus including one or more second processors configured to compute a conditioning level on a basis of system information for a respective pair of the optical transmission apparatuses in the optical transmission system, such that an optical intensity differential among a plurality of subchannels in the wavelength-division multiplexed light signal that has been adjusted and output from the conditioning unit in an optical transmission apparatus does not exceed a reference threshold in a superchannel signal output from the conditioning unit, and notify the pair of the optical transmission apparatuses of the computed conditioning level, wherein the optical transmission apparatuses adjust transmittance of the conditioning unit based on the computed conditioning level, wherein the superchannel signal comprises the plurality of subchannels that are multiplexed, wherein the one or more second processors compute the conditioning level such that the transmittance of the conditioning unit in the center band of the wavelength-division multiplexed light signal are decreased to less than the transmittance of the conditioning unit in the edge band of the wavelength-division multiplexed light signal.