OPTICAL RELAY DEVICE, CONTROL METHOD, AND OPTICAL TRANSMISSION SYSTEM
First Claim
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1. An optical relay device comprising:
- a wavelength selective switcher capable of performing path switching in wavelength units and optical level adjustment for each of wavelengths and incapable of receiving new setting during a setting change of a wavelength and a band transmitted through ports, and transmittance; and
a controller to instruct, on the basis of a fluctuation amount of an optical level for each of the wavelengths of an optical signal output from the wavelength selective switch and setting information indicating, for each of the wavelengths, whether optical level adjustment for the wavelengths of the optical signal is being carried out in another optical relay device, the wavelength selective switcher to perform a setting change of an optical level adjustment amount of the optical signal, wherein the controller excludes a wavelength, the optical level adjustment for which is being carried out by another optical relay device, from a target of the optical level adjustment.
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Abstract
An optical relay device includes a WSS functioning as a wavelength selective switch capable of performing path switching in wavelength units and optical level adjustment for each of wavelengths and a control device that instructs, on the basis of a fluctuation amount of an optical level for each of the wavelengths of an optical signal output from the WSS and setting information indicating, for each of the wavelengths, whether optical level adjustment for the wavelengths of the optical signal is enabled, the WSS to perform a setting change of an optical level adjustment amount of the optical signal.
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Citations
11 Claims
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1. An optical relay device comprising:
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a wavelength selective switcher capable of performing path switching in wavelength units and optical level adjustment for each of wavelengths and incapable of receiving new setting during a setting change of a wavelength and a band transmitted through ports, and transmittance; and a controller to instruct, on the basis of a fluctuation amount of an optical level for each of the wavelengths of an optical signal output from the wavelength selective switch and setting information indicating, for each of the wavelengths, whether optical level adjustment for the wavelengths of the optical signal is being carried out in another optical relay device, the wavelength selective switcher to perform a setting change of an optical level adjustment amount of the optical signal, wherein the controller excludes a wavelength, the optical level adjustment for which is being carried out by another optical relay device, from a target of the optical level adjustment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11)
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8. A control method for a wavelength selective switcher capable of performing path switching in wavelength units and optical level adjustment for each of wavelengths and incapable of receiving new setting during a setting change of a wavelength and a band transmitted through ports, and transmittance;
- the control method comprising;
determining, for each of the wavelengths, whether optical levels of the wavelengths output from the wavelength selective switch fluctuate; determining, on the basis of setting information indicating, for each of the wavelengths, whether optical level adjustment for wavelengths of an optical signal output from the wavelength selective switcher is being carried out in another optical relay device and a determination result in the optical-level-fluctuation detecting, for each of the wavelengths, whether the optical level adjustment is necessary; determining the optical level adjustment amount of a waveform for which the optical level adjustment is determined as necessary in the adjustment-implementation determining; and notifying transmittances of the wavelengths based on the optical level adjustment amount determined in the level-adjustment-amount determining to the wavelength selective switcher and instructing a setting change of the optical level adjustment amount at a time when the wavelength selective switcher outputs the optical signal, wherein in the adjustment-implementation determining, a wavelength, the optical level adjustment for which is being carried out by another optical relay device, is excluded from a target of the optical level adjustment.
- the control method comprising;
Specification