公开(公告)号：US10256903B2

公开(公告)日：2019-04-09

申请号：US15821018

申请日：2017-11-22

申请人： FUJITSU LIMITED

发明人： Shoichiro Oda ,  Yasuhiko Aoki ,  Takeshi Hoshida ,  Hisao Nakashima ,  Hiroki Oi

IPC分类号： H04B10/079 ,  H04L27/00 ,  H04J14/06 ,  H04B10/564 ,  H04J14/02

摘要： A network controller includes: a first acquisition unit configured to acquire, based on a signal quality amount of each of wavelength paths set in a network of an optical wavelength-multiplexed transmission system, a signal quality amount of each of spans in each of the wavelength paths; an arithmetic unit configured to calculate a signal quality amount of each of spans in a wavelength path of an estimation target, based on the signal quality amount acquired by the first acquisition unit; and an estimation unit configured to estimate a signal quality amount of the wavelength path of the estimation target, based on the signal quality amount calculated by the arithmetic unit.

公开(公告)号：US20190081701A1

公开(公告)日：2019-03-14

申请号：US16110451

申请日：2018-08-23

申请人： FUJITSU LIMITED

发明人： Shoichiro Oda ,  Takeshi Hoshida ,  Hisao Nakashima ,  Yi Ge

IPC分类号： H04B10/079 ,  H04L1/20

CPC分类号： H04B10/07953 ,  H04L1/20 ,  H04L1/205

摘要： A transmission device includes: a receiving unit that receives an optical signal; an acquiring unit that acquires spectrum information from the optical signal, the spectrum information relating to a spectrum of the optical signal; and a narrowing calculating unit that calculates an index value for narrowing of a band of the optical signal by calculating a sampling timing error in accordance with the spectrum information, the sampling timing error being an error when a clock signal is extracted from the optical signal.

公开(公告)号：US09917639B2

公开(公告)日：2018-03-13

申请号：US14971225

申请日：2015-12-16

申请人： FUJITSU LIMITED

发明人： Shoichiro Oda ,  Yasuhiko Aoki

IPC分类号： H04B10/079

CPC分类号： H04B10/07953

摘要： An optical signal quality monitoring apparatus includes: a holding unit configured to hold a relational expression representing a relationship among an optical signal intensity, a noise intensity, and an optical signal-to-noise ratio and a plurality of calibration coefficients used in the relational expression; a measurement unit configured to measure an optical power of input light and a noise power in the input light; an arithmetic unit configured to calculate a plurality of optical signal-to-noise ratios, based on the optical power and the noise power measured by the measurement unit, by using the relational expression and the plurality of calibration coefficients; and a determination unit configured to select one optical signal-to-noise ratio from the plurality of optical signal-to-noise ratios, based on a magnitude relationship of the plurality of optical signal-to-noise ratios calculated by the arithmetic unit.

公开(公告)号：US20170310391A1

公开(公告)日：2017-10-26

申请号：US15489836

申请日：2017-04-18

申请人： FUJITSU LIMITED

发明人： Shoichiro Oda ,  MASATAKE MIYABE ,  Setsuo Yoshida ,  Yasuhiko Aoki ,  Toru Katagiri ,  GOJI NAKAGAWA ,  Shigeru ISHll ,  Yutaka Takita

IPC分类号： H04B10/079 ,  H04B10/27

CPC分类号： H04B10/0795 ,  H04J14/0201

摘要： There is provided an apparatus configured to estimate optical transmission performance in a transmission path of an optical signal, the apparatus including a memory, and a processor coupled to the memory and the processor configured to acquire a first index related to a first transmission performance of an optical signal transmitted through a span group between a first node and an n-th node and a second index related to a second transmission performance of an optical signal transmitted through a span or a span group between the first node and an m-th node, wherein n is an integer of 3 or more, and m is the integer satisfying m

公开(公告)号：US09780905B2

公开(公告)日：2017-10-03

申请号：US14805988

申请日：2015-07-22

申请人： FUJITSU LIMITED

发明人： Tomohiro Yamauchi ,  Shoichiro Oda

IPC分类号： H04J14/02 ,  H04B10/2507

CPC分类号： H04J14/0221 ,  H04B10/2507

摘要： A transmission system includes: an acquisition section configured to acquire a free band between a target channel including a plurality of wavelength signals contiguous to one another and a channel adjacent to the target channel; and an adjustment section configured to adjust signal power of at least one of the plurality of wavelength signals in the target channel, based on a power adjustment amount for the wavelength signal, the power adjustment amount being provided for the free band acquired by the acquisition section.

公开(公告)号：US20170214461A1

公开(公告)日：2017-07-27

申请号：US15410237

申请日：2017-01-19

申请人： FUJITSU LIMITED

发明人： Tomohiro YAMAUCHI ,  Shoichiro Oda

IPC分类号： H04B10/079 ,  H04J14/02

CPC分类号： H04B10/07957 ,  H04B10/0793 ,  H04B10/07955 ,  H04B10/0797 ,  H04B10/293 ,  H04B10/506 ,  H04B10/564 ,  H04J14/0221 ,  H04J14/0227 ,  H04J14/0256 ,  H04J14/0257

摘要： An optical transmission apparatus includes a variable attenuator configured to adjust output intensity of each wavelength signal included in a multiplexed optical signal having been input; a monitor configured to measure an output spectrum of the variable attenuator; a calculation unit configured to calculate an amount of spectral narrowing and an amount of spectral surplus, based on a measured value by the monitor, and a target value set in advance; and a control unit configured to control an amount of attenuation of the variable attenuator, based on the amount of spectral narrowing and the amount of spectral surplus.

公开(公告)号：US20170155981A1

公开(公告)日：2017-06-01

申请号：US15259530

申请日：2016-09-08

申请人： FUJITSU LIMITED

发明人： GOJI NAKAGAWA ,  Yasuhiko Aoki ,  Kyosuke Sone ,  Shoichiro Oda ,  Setsuo Yoshida

IPC分类号： H04Q11/00 ,  H04J14/02

CPC分类号： H04Q11/0005 ,  H04J14/0212 ,  H04J14/0257 ,  H04J14/0276 ,  H04J14/0282 ,  H04J14/0293 ,  H04J14/0297 ,  H04Q2011/0015 ,  H04Q2011/0016 ,  H04Q2011/0018

摘要： An optical transmission device includes: a plurality of optical transceivers; a wavelength selective switch; and a controller configured to control the plurality of optical transceivers and the wavelength selective switch. Each of the optical transceivers includes a wavelength tunable light source. The controller controls a wavelength of a wavelength tunable light source of a selected optical transceiver according to a wavelength of an optical signal received by the destination remote device. The controller controls the wavelength selective switch so as to generate the WDM optical signal from a plurality of optical signals generated by the plurality of optical transceivers, and to guide the plurality of optical signals received from the plurality of remote devices to the plurality of optical transceivers according to wavelengths of the received plurality of optical signals.

公开(公告)号：US20170047993A1

公开(公告)日：2017-02-16

申请号：US15227580

申请日：2016-08-03

申请人： FUJITSU LIMITED

发明人： GUOXIU HUANG ,  Yasuhiko Aoki ,  Shoichiro Oda ,  Zhenning Tao ,  Setsuo Yoshida ,  Kyosuke Sone

IPC分类号： H04B10/079 ,  H04B10/548

CPC分类号： H04B10/07955 ,  H04B10/0775 ,  H04B10/548

摘要： A transmitter generates a frequency-modulated CW light so as to transmit it to a path. A receiver receives the CW light that has passed through passband filters included in the path. The receiver includes a processor. The processor measures an optical power of the received CW light every time a center frequency of the CW light is changed and transmitted by the transmitter. The processor calculates transmission characteristics of the CW light that has passed through the passband filters, on the basis of an average value of the optical power that corresponds to a center frequency of the CW light and on the basis of an amplitude component that indicates an amount of change in the optical power, the average value and the amplitude component being obtained as a result of the measurement.

摘要翻译： 发射机产生调频CW光，以将其发送到路径。 接收器接收已经通过路径中包括的通带滤波器的CW光。 接收机包括处理器。 每当CW光的中心频率被发射机改变并发射时，处理器测量接收的CW光的光功率。 处理器基于与CW光的中心频率对应的光功率的平均值，并且基于指示量的幅度分量来计算已经通过通带滤波器的CW光的传输特性 光功率的变化，作为测量结果获得的平均值和振幅分量。

公开(公告)号：US09444573B2

公开(公告)日：2016-09-13

申请号：US14658750

申请日：2015-03-16

申请人： FUJITSU LIMITED

发明人： Goji Nakagawa ,  Shoichiro Oda

IPC分类号： H04J14/02 ,  H04Q11/00 ,  H04B10/67

CPC分类号： H04J14/0221 ,  H04B10/675 ,  H04J14/0212 ,  H04J14/0258 ,  H04Q11/0066 ,  H04Q2011/0009 ,  H04Q2011/0016 ,  H04Q2011/0083

摘要： A transmission device that receives an optical signal on which a frequency modulated signal is superimposed includes: an optical filter configured to filter the optical signal; a filter controller configured to control a passband of the optical filter based on a change of power of the optical signal; and a signal detection unit configured to detect the frequency modulated signal based on the change of the power of the optical signal filtered by the optical filter.

摘要翻译： 接收其上叠加有调制信号的光信号的发送装置包括：滤波器，被配置为对所述光信号进行滤波; 滤波器控制器，被配置为基于所述光信号的功率的变化来控制所述滤光器的通带; 以及信号检测单元，被配置为基于由所述滤光器滤波的光信号的功率的变化来检测所述调频信号。

公开(公告)号：US09225459B2

公开(公告)日：2015-12-29

申请号：US13625987

申请日：2012-09-25

申请人： FUJITSU LIMITED

发明人： Shoichiro Oda ,  Takeshi Hoshida ,  Hisao Nakashima ,  Takahito Tanimura ,  Yasuhiko Aoki

IPC分类号： H04J14/02 ,  H04B10/50 ,  H04B10/564

CPC分类号： H04J14/0221 ,  H04B10/506 ,  H04B10/564 ,  H04J14/0212 ,  H04J14/0254 ,  H04J14/0271

摘要： An optical transmission system includes optical transmission apparatuses configured to transmit wavelength-division multiplexed light signals via lightpaths, each of a pair of optical transmission apparatuses includes a conditioning unit configured to adjust the optical intensities of channels included in the wavelength-division multiplexed light signal, and one or more first processors configured to control, based on a conditioning level notified, the conditioning unit; and a managing apparatus configured to manage the pair of the optical transmission apparatuses, the managing apparatus including one or more second processors configured to compute a conditioning level on a basis of system information for respective the pair of optical transmission apparatuses in the optical transmission system.

摘要翻译： 光传输系统包括被配置为经由光路发送波分复用光信号的光传输装置，一对光传输装置中的每一个包括调整部，其被配置为调整包括在波分复用光信号中的信道的光强度， 以及一个或多个第一处理器，被配置为基于所通知的调节级别来控制所述调节单元; 以及管理装置，被配置为管理所述一对光传输装置，所述管理装置包括一个或多个第二处理器，所述第二处理器被配置为基于所述光传输系统中的所述一对光传输装置的系统信息来计算调节级别。