Patent ID: 7912373
Filing Date: 2011-03-22
Classification: H04J,H04Q

Abstract:
1. An optical transmission apparatus which receives first wavelength multiplexed optical signals from a first optical transmission path, and transmits at least a portion of the optical signals having respectively different wavelengths, included in the first wavelength multiplexed optical signals, to a second optical transmission path, the optical transmission apparatus comprising: a wavelength demultiplexing unit which demultiplexes the first wavelength multiplexed optical signals into a plurality of optical signals with respectively different wavelengths; a dropping unit which drops at least a portion of optical signals included in the plurality of optical signals that have passed through the wavelength demultiplexing unit; a wavelength converting unit which converts wavelength of at least a portion of optical signals included in a plurality of optical signals that have passed through the dropping unit without being dropped; a wavelength adding unit which adds other optical signals imputed from outside the apparatus, to a plurality of optical signals that have passed through the wavelength converting unit; and a wavelength multiplexing unit which multiplexes wavelengths of a plurality of optical signals that have passed through the wavelength adding unit wherein, an operation system, which controls usage situation of wavelength in the optical transmission apparatus, gives notification of a wavelength that is not used in the second optical transmission path, the wavelength converting unit converts, among a plurality of optical signals that have passed through the dropping unit, the wavelength of an optical signal whose wavelength is the same as the wavelength of an optical signal added by the wavelength adding unit, to said wavelength that is available to be used in the second optical transmission path.