Patent ID: 9191143
Filing Date: 2015-11-17
Classification: H04B,H04J

Abstract:
1. An optical transmission device comprising: a detecting unit that detects a value of optical power of each of multiple wavelengths in wavelength multiplexed light that is targeted for transmission; a notifying unit that notifies an optical transmission device at an upstream side that has sent signal light of each of the wavelengths of a control frame that includes the value of the optical power of each of the wavelengths detected by the detecting unit and that includes information that indicates an execution state of optical power control that controls an adjustment level set in an optical device that adjusts the optical power of each of the wavelengths; and a control unit that calculates the adjustment level on the basis of the value of the optical power of each of the wavelengths detected by the detecting unit, that calculates, when the information included in a control frame sent from an optical transmission device at a downstream side indicates that the optical power control is being stopped, the adjustment level of the optical power of each of the wavelengths included in the control frame, and that sets the calculated adjustment level to the optical device so that the control unit executes the optical power control, wherein the control frame sent from the optical transmission device at the downstream side to the optical transmission device further includes device-by-wavelength identification information that is identification information on the optical transmission device at the upstream side that has sent the signal light of each of the wavelengths by associating the device-by-wavelength identification information with the value of the optical power of each of the wavelengths, when the information included in the control frame sent from the optical transmission device at the downstream side to the optical transmission device indicates that the optical power control is being stopped, the control unit determines whether the device-by-wavelength identification information included in the control frame sent from the optical transmission device at the downstream side to the optical transmission device corresponds to the identification information on the optical transmission device, when the device-by-wavelength identification information corresponds to the identification information on the optical transmission device, the control unit acquires, from the control frame sent from the optical transmission device at the downstream side to the optical transmission device, the value of the optical power of each of the wavelengths associated with the device-by-wavelength identification information and calculates the adjustment level on the basis of the acquired value of the optical power of each of the wavelengths, and when the device-by-wavelength identification information does not correspond to the identification information on the optical transmission device, the control unit calculates the adjustment level on the basis of the value of the optical power of each of the wavelengths detected by the detecting unit.