Patent ID: 8611748

Claim:
A Wavelength Division Multiplexing (WDM) optical transmission system including a plurality of optical transmission devices, each of the optical transmission devices comprising: a compensator that compensates a wavelength dispersion of an optical signal which has a variable wavelength dispersion value; a detection circuit that detects a reception characteristic of the optical signal compensated by the compensator; a first memory that stores a first control program that controls a dispersion compensation amount of the compensator in a host device according to the reception characteristic; a processor to execute the first control program; a notification frame transmission circuit that generates a notification frame that includes control information indicating a setting value of the dispersion compensation amount and a detection result of the detection circuit corresponding to the setting value, and that transmits the notification frame to another optical transmission device; a second memory that stores control information included in the notification frame transmitted from the another optical transmission device; a third memory that stores a second control program that calculates a control value of the compensator in the another optical transmission device using the control information stored in the second memory; and a control frame transmission circuit that generates a control frame that includes the control value, and that transmits the control frame to the another optical transmission device, wherein the processor: executes the second control program when a problem occurs in a dispersion compensation control of the another optical transmission device, and controls the dispersion compensation amount of the compensator in the host device according to the control value included in the control frame transmitted from the another optical transmission device when a problem occurs in the dispersion compensation control of the host device.