Patent ID: 11968033
Assignee: FUJITSU LIMITED
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. An optical transmission device that transmits a WDM (wavelength division multiplexed) signal to a reception node via an optical fiber transmission line, the optical transmission device comprising:
an optical channel monitor that detects transmission power of each wavelength channel of the WDM signal; and
a processor that
acquires information indicating a linear SNR (signal-to-noise ratio) of each wavelength channel of the WDM signal, the linear SNR being calculated based on received optical power of each wavelength channel of the WDM signal detected at the reception node,
calculates a non-linear SNR of each wavelength channel of the WDM signal based on optical power of each wavelength channel detected by the optical channel monitor,
calculates a GSNR (generalized SNR) of each wavelength channel of the WDM signal using the linear SNR and the non-linear SNR, and
controls the transmission power of each wavelength channel of the WDM signal based on the GSNR of each wavelength channel.