Reception device and method of detecting supervisory control signal

Patent metadata

Field	Value
Publication number	US-2018248643-A1
Application number	US-201815900128-A
Country	US
Kind code	A1
Filing date	Feb 20, 2018
Priority date	Feb 24, 2017
Publication date	Aug 30, 2018
Grant date	—

Abstract

There is provided a reception device including a receiver configured to receive a wavelength-multiplexed optical signal so as to generate a wavelength-multiplexed signal, a filter configured to pass through the wavelength-multiplexed signal having a specific wavelength and an adjacent wavelength to the specific wavelength from the wavelength-multiplexed signal, and a processor configured to detect a specific signal having the specific wavelength from the wavelength-multiplexed signal having the passed through wavelengths by the filter, and detect a first supervisory control signal having the specific wavelength and a second supervisory control signal having the adjacent wavelength from the wavelength-multiplexed signal having the passed through wavelengths by the filter.

First claim

What is claimed is:

1 . A reception device, comprising:
a receiver configured to receive a wavelength-multiplexed optical signal so as to generate a wavelength-multiplexed signal; a filter configured to pass through the wavelength-multiplexed signal having a specific wavelength and an adjacent wavelength to the specific wavelength from the wavelength-multiplexed signal; and a processor configured to: detect a specific signal having the specific wavelength from the wavelength-multiplexed signal having the passed through wavelengths by the filter, and detect a first supervisory control signal having the specific wavelength and a second supervisory control signal having the adjacent wavelength from the wavelength-multiplexed signal having the passed through wavelengths by the filter.

2 . The reception device according to claim 1 ,
wherein a frequency shift keying-supervisory (FSK-SV) scheme is used as a modulation scheme in which the first supervisory control signal and the second supervisory control signal are superimposed on the specific wavelength and the adjacent wavelength, respectively.

3 . The reception device according to claim 1 ,
wherein the processor is further configured to: detect the first supervisory control signal from the wavelength-multiplexed signal having the passed through wavelengths by the filter; pass through the wavelength-multiplexed signal having the adjacent wavelength from the wavelength-multiplexed signal having the passed through wavelengths by the filter; and detect the second supervisory control signal from the passed through wavelength-multiplexed signal having the adjacent wavelength.

4 . The reception device according to claim 3 ,
wherein the processor is further configured to: offset a frequency on the passed through wavelength-multiplexed signal having the adjacent wavelength; perform a down-sampling on the passed through wavelength-multiplexed signal having the offset frequency; and detect the second supervisory control signal from the wavelength-multiplexed signal on which the down-sampling is performed.

5 . The reception device according to claim 4 ,
wherein the processor is further configured to: detect each of the first supervisory control signal and the second supervisory control signal by monitoring the offset frequency or a signal intensity of the passed through wavelength-multiplexed signal having the adjacent wavelength.

6 . The reception device according to claim 1 ,
wherein the processor is further configured to: detect the first supervisory control signal from the wavelength-multiplexed signal having the passed through wavelengths by the filter according to a first control signal; pass through the wavelength-multiplexed signal having the adjacent wavelength from the wavelength-multiplexed signal having the passed through wavelengths by the filter according to a second control signal; and detect the second supervisory control signal from the passed through wavelength-multiplexed signal having the adjacent wavelength according to the second control signal, wherein the first control signal and the second control signal are mutually shifted in time series.

7 . The reception device according to claim 6 , further comprising:
a light source configured to emit local light, wherein the receiver is configured to receive the wavelength-multiplexed optical signal according to the local emission, and control the light source so that a signal intensity of the wavelength-multiplexed signal having the adjacent wavelength is increased.

8 . The reception device according to claim 1 ,
wherein an identification number of a super channel is superimposed on the first supervisory control signal and the second supervisory control signal, and wherein the processor is further configured to recognize a position within the super channel of the specific wavelength based on the identification number.

9 . The reception device according to claim 1 ,
wherein a wavelength setting command is superimposed on the first supervisory control signal and the second supervisory control signal, and wherein the processor is further configured to set the specific wavelength, based on the wavelength setting command transmitted by a command relay scheme.

10 . A method of detecting a supervisory control signal, the method comprising:
receiving a wavelength-multiplexed optical signal so as to generate a wavelength-multiplexed signal, by a receiver; passing through the wavelength-multiplexed signal having a specific wavelength and an adjacent wavelength to the specific wavelength from the wavelength-multiplexed signal, by a filter; and detecting a specific signal having the specific wavelength, a first supervisory control signal having the specific wavelength, and a second supervisory control signal having the adjacent wavelength from the wavelength-multiplexed signal having the passed through wavelengths, by a processor.

Assignees

• Fujitsu Ltd

Inventors

• Ge Yi
• Hoshida Takeshi
• Nakashima Hisao
• Oyama Tomofumi
• Akiyama Yuichi

Classifications

• H04B10/556

  Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK] · CPC title

• H04B10/612

  for optical signals modulated with a format different from binary or higher-order PSK [X-PSK], e.g. QAM, DPSK, FSK, MSK, ASK · CPC title

• H04J14/0227 Primary

  Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation · CPC title

• H04B10/548

  Phase or frequency modulation · CPC title

• H04B10/66

  Non-coherent receivers, e.g. using direct detection · CPC title