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1. 发明专利

JP2005086466A Burst optical receiving device by gain switch system 有权
标题翻译：通过增益开关系统的BURST光接收装置
公开(公告)号：JP2005086466A
公开(公告)日：2005-03-31
申请号：JP2003316185
申请日：2003-09-09
申请人： Hitachi Communication Technologies Ltd , Hitachi Ltd , 株式会社日立コミュニケーションテクノロジー , 株式会社日立製作所
发明人： TOSAKA KENJI , TAJIMI NOBURO , MORITA YOSHINOBU , ABE YOSHITAKA
IPC分类号： H04B10/07 , H04B10/272 , H04B10/293 , H04B10/40 , H04B10/50 , H04B10/524 , H04B10/564 , H04B10/572 , H04B10/58 , H04B10/60 , H04B10/69 , H04L25/03 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26 , H04B10/28
摘要： PROBLEM TO BE SOLVED: To provide a receiving device where a wide reception dynamic range and miniaturization are attained in high speed optical burst signal reception.
SOLUTION: In the receiving device of a base station, an outer reset signal is inputted to a preamplifier, and the preamplifier switches a gain in accordance with optical burst signal intensity from each slave station. When the gain is switched, a reset signal is transmitted to ATC in a post-stage and a received signal level discrimination threshold of ATC is set again. Since the signal determination threshold of ATC in the post-stage is set again in accordance with the gain switching of the preamplifier, ATC can set an appropriate signal determination threshold corresponding to an output of the preamplifier.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种在高速光脉冲串信号接收中获得宽的接收动态范围和小型化的接收装置。解决方案：在基站的接收设备中，外部复位信号被输入到前置放大器，并且前置放大器根据来自每个从站的光突发信号强度切换增益。当增益被切换时，在后级将复位信号发送到ATC，再次设置ATC的接收信号电平鉴别阈值。由于根据前置放大器的增益切换再次设置后级中的ATC的信号判定阈值，所以ATC可以设置与前置放大器的输出对应的适当的信号判定阈值。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2008099298A Method of adjusting light signal transmission timing 有权
标题翻译：调整光信号传输时序的方法
公开(公告)号：JP2008099298A
公开(公告)日：2008-04-24
申请号：JP2007269645
申请日：2007-10-17
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： KAZAWA TORU , OHIRA MASATERU , YAJIMA YUSUKE , TSUCHIYA AKIHIKO , MORITA YOSHINOBU
IPC分类号： H04L12/44 , H04B10/07 , H04B10/27 , H04B10/272 , H04J14/08
摘要： PROBLEM TO BE SOLVED: To provide a PON (Passive Optical Network) system that prevents a phenomenon, where light having a large level is received by a light receiving element, such as an APD (Avalanche Photo Diode) used for receiving a high-speed and feeble light signal and then a successively input signal is distorted, and allows an OLT (Optical Line Terminal) to transmit received data to each ONU (Optical Network Unit) fairly and efficiently as much as possible.
SOLUTION: Based on light reception amplitude received for each ONU, the gap between frames having appropriate length is assigned for each ONU. The OLT has a means for measuring and storing the light reception amplitude, and has data of the gap between the frames having appropriate length decided according to the characteristics of a light reception device in advance. The information of the two is used to generate a ground value for ensuring the gap between the frames having the appropriate length.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种PON（Passive Optical Network，无源光网络）系统，其防止由光接收元件接收具有大电平的光的现象，例如用于接收信号的APD（雪崩光电二极管）高速和微弱的光信号，然后连续输入信号失真，并允许OLT（光线路终端）尽可能公平有效地将接收的数据发送到每个ONU（光网络单元）。解决方案：根据每个ONU接收到的光接收幅度，为每个ONU分配适当长度的帧之间的间隙。 OLT具有用于测量和存储光接收振幅的装置，并且具有预先根据光接收装置的特性确定的具有适当长度的帧之间的间隙的数据。两者的信息用于产生用于确保具有适当长度的帧之间的间隙的接地值。版权所有（C）2008，JPO＆INPIT

3. 发明专利

JP2010056911A Optical signal generation circuit 审中-公开
标题翻译：光信号发生电路
公开(公告)号：JP2010056911A
公开(公告)日：2010-03-11
申请号：JP2008219950
申请日：2008-08-28
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： TAKAGI SHOTA , MORITA YOSHINOBU , SUZUKI MUNETOSHI , MATSUOKA MAKOTO , OKADA SUMIMASA
IPC分类号： H04B10/2507 , H04B10/07 , H04B10/27 , H04B10/272 , H04B10/40 , H04B10/50 , H04B10/524 , H04B10/54 , H04B10/564 , H04B10/60 , H04J14/00 , H04J14/02 , H04J14/08
摘要： PROBLEM TO BE SOLVED: To provide an optical signal generation circuit 30 in which variation in intensity and extinction ratio of light generated by an LD 310 for communication according to transmission data is suppressed.
SOLUTION: For instance, an optical signal generation circuit 30 is used for a PON system 10 and generates an optical signal corresponding to data to be transmitted. The optical signal generation circuit includes the LD 310 for communication for generating the optical signal, a dummy LD 311 provided in the vicinity of the LD 310 for communication, and a driver circuit 32 which makes the LD 310 for communication emit light according to the data to be transmitted and makes the dummy LD 311 emit light to cause the dummy LD 311 to generate heat when the LD 310 for communication does not emit the light.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：解决的问题：提供一种光信号发生电路30，其中抑制了根据传输数据的用于通信的LD 310产生的光的强度和消光比的变化。解决方案：例如，光信号生成电路30用于PON系统10，并且生成与要发送的数据相对应的光信号。光信号产生电路包括用于产生光信号的通信的LD 310，设置在LD 310附近用于通信的虚拟LD 311以及使通信用LD 310根据数据发光的驱动电路32 被发送，并且当用于通信的LD 310不发光时，虚拟LD 311发光，使得虚拟LD 311发热。版权所有（C）2010，JPO＆INPIT

4. 发明专利

JP2008099050A Optical signal transmission timing control method 有权
标题翻译：光信号传输时序控制方法
公开(公告)号：JP2008099050A
公开(公告)日：2008-04-24
申请号：JP2006279443
申请日：2006-10-13
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： KAZAWA TORU , OHIRA MASATERU , YAJIMA YUSUKE , TSUCHIYA AKIHIKO , MORITA YOSHINOBU
IPC分类号： H04B10/07 , H04B10/25 , H04B10/2507 , H04B10/27 , H04B10/272 , H04B10/40 , H04B10/50 , H04B10/58 , H04B10/60 , H04B10/67 , H04B10/69 , H04J14/08 , H04L12/44
CPC分类号： H04B10/272 , H04J3/0682 , H04J3/1694
摘要： PROBLEM TO BE SOLVED: To provide a PON system in which an OLT is capable of transmitting photo-detected data to each of ONUs as fairly and efficiently as much as possible while preventing a phenomenon that a continuously inputted signal is distorted, after high-level light is received in a photo-detector such as an APD used for receiving a fast and weak optical signal.
SOLUTION: On the basis of a light receiving amplitude received at each ONU, an inter-frame gap of a suitable length is assigned at each ONU. An OLT comprises a means for measuring and accumulating the received light amplitude and comprises data about the inter-frame gap of a suitable length predetermined in accordance with characteristics of a light receiving device, and a ground value for securing the inter-frame gap of the suitable length is generated using both the information.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种PON系统，其中OLT能够尽可能公平和有效地向每个ONU发送光检测数据，同时防止连续输入的信号失真的现象，之后在诸如用于接收快速和弱光信号的APD的光检测器中接收高电平光。解决方案：基于在每个ONU处接收的光接收幅度，在每个ONU处分配适当长度的帧间间隔。 OLT包括用于测量和累积接收到的光振幅的装置，并且包括关于根据光接收装置的特性预定的合适长度的帧间间隙的数据，以及用于确保所述帧间间隔的接地值使用这两个信息生成合适的长度。版权所有（C）2008，JPO＆INPIT

5. 发明专利

JP2014216684A 光加入者終端装置审中-公开
标题翻译：光电订书机
公开(公告)号：JP2014216684A
公开(公告)日：2014-11-17
申请号：JP2013089911
申请日：2013-04-23
申请人：株式会社日立製作所 , Hitachi Ltd
发明人： MATSUNAGA YU , TOSAKA KENJI , MORITA YOSHINOBU
IPC分类号： H04B10/54 , H04B10/272
摘要：【課題】複数の宅内光回線終端装置(ONU)が収容されるPONシステムにおけるONUからOLTへ信号を送信する場合の経年劣化等の影響による消光比悪化を抑制し、光送信パワーと消光比を設定する。【解決手段】宅内光回線終端装置(ONU)はバースト送信時のプリアンブル部及びデータ部において平均パワーを検出し、レーザオフタイムにおいて“0”レベルを検出する。検出した平均パワーを用いてモジュレーション電流を設定し、検出した“0”レベルを用いてバイアス電流を設定することによって光送信パワーと消光比を設定する。【選択図】図10
摘要翻译：要解决的问题：为了设置光传输功率和消光比，通过抑制在将来自多个光网络单元（ONU）的信号发送到OLT的PON系统中，由于老化引起的消光比的劣化， ONU.SOLUTION：光网络单元（ONU）在突发传输期间检测前导码部分和数据部分的平均功率，并且即使在激光关闭时间也检测“0”电平。通过使用这样检测的平均功率来设置调制电流，然后使用“0”电平设置偏置电流，从而设置光传输功率和消光比。

6. 发明专利

JP2013009060A Passive optical network system, power control method, and onu 审中-公开
标题翻译：被动光网络系统，功率控制方法和ONU
公开(公告)号：JP2013009060A
公开(公告)日：2013-01-10
申请号：JP2011139028
申请日：2011-06-23
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： IWADATE HIROKI , TOSAKA KENJI , MORITA YOSHINOBU
IPC分类号： H04L12/44 , H04B10/27 , H04B10/293 , H04B10/564 , H04B10/572
摘要： PROBLEM TO BE SOLVED: To provide a passive optical network system capable of reducing power consumption.SOLUTION: An ONU transmits predetermined data to an OLT while varying transmission power of an optical signal. The OLT returns the data to the ONU. The ONU calculates an error rate of the returned data. A passive optical network system determines minimum power which can realize a predetermined error rate on the basis of the calculated error rate and the transmission power of the data which is an original of the returned data.
摘要翻译：要解决的问题：提供能够降低功耗的无源光网络系统。解决方案：ONU在改变光信号的发射功率的同时向OLT发送预定的数据。 OLT将数据返回给ONU。 ONU计算返回数据的错误率。无源光网络系统确定可以基于所计算的误差率和作为返回数据的原始数据的发送功率来实现预定错误率的最小功率。版权所有（C）2013，JPO＆INPIT

7. 发明专利

JP2011120035A Video signal receiving apparatus, and video transmission system 有权
标题翻译：视频信号接收设备和视频传输系统
公开(公告)号：JP2011120035A
公开(公告)日：2011-06-16
申请号：JP2009276082
申请日：2009-12-04
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TOSAKA KENJI , MORITA YOSHINOBU , KAZAWA TORU
IPC分类号： H04B10/00 , H04B10/2507 , H04B10/2543 , H04B10/27 , H04B10/272 , H04B10/548 , H04B10/58 , H04B10/69
摘要： PROBLEM TO BE SOLVED: To reduce deterioration in video quality caused by signal width distortion due to nonlinear effects in a video transmission system using an FM batch conversion system.
SOLUTION: After an FM batch conversion signal received in a V-ONU is subjected to optical/electrical conversions 31, 32, a differential amplifier 33 which has a gain depending upon the amplitude of the input signal is installed, the FM batch conversion signal is input to one terminal of the differential amplifier 33, and a comparison threshold voltage is given to the other input terminal. In accordance with the output of the differential amplifier 33, a threshold voltage is generated through a signal width distortion detecting section 35 and a correction threshold generating section 36 on the basis of an FM batch carrier level output from an FM batch demodulation circuit 34. By increasing/decreasing the threshold voltage in accordance with the signal width distortion, a signal in which the signal width distortion has been decreased is obtained.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了减少由于使用FM批量转换系统的视频传输系统中的非线性效应引起的信号宽度失真导致的视频质量的恶化。解决方案：在V-ONU中接收的FM批量转换信号经受光/电转换31,32之后，安装了具有取决于输入信号幅度的增益的差分放大器33，FM批转换信号被输入到差分放大器33的一个端子，并且给另一个输入端子提供比较阈值电压。根据差分放大器33的输出，通过信号宽度失真检测部分35和校正阈值产生部分36基于从FM批量解调电路34输出的FM批量载波电平产生阈值电压。通过根据信号宽度失真增加/减少阈值电压，获得信号宽度失真已经减小的信号。版权所有（C）2011，JPO＆INPIT

8. 发明专利

JP2014158211A Receiving device and optical video-distribution system 审中-公开
标题翻译：接收设备和光学视频分配系统
公开(公告)号：JP2014158211A
公开(公告)日：2014-08-28
申请号：JP2013028959
申请日：2013-02-18
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YOSHIOKA HIROYUKI , TAJIMI NOBURO , MORITA YOSHINOBU
IPC分类号： H04B10/2513 , H04B10/2537 , H04B10/27 , H04J14/00 , H04J14/02 , H04L27/14
摘要： PROBLEM TO BE SOLVED: To perform dynamic wavelength dispersion compensation according to an optical transmission line.SOLUTION: A receiving device reproducing a multi-channel video signal comprises: an optical-current conversion circuit converting an FM modulation optical signal outputted from a transmitting device into an FM modulation current signal; a first current-voltage conversion circuit converting the FM modulation current signal outputted from the optical-current conversion circuit into an FM modulation voltage signal; an FM demodulation circuit reproducing the multi-channel video signal from the FM modulation voltage signal outputted from the first current-voltage conversion circuit; an induced Brillouin scattering suppression signal extraction circuit extracting an induced Brillouin scattering suppression signal from a bias-voltage supply line of the optical-current conversion circuit; and a phase-shifting circuit adjusting a phase of a voltage signal outputted from the induced Brillouin scattering suppression signal extraction circuit. The phase-shifting circuit outputs a voltage signal having a reverse phase to an amplitude modulation signal component of the voltage signal outputted from the FM demodulation circuit, and the receiving device outputs a signal obtained by multiplying the voltage signal outputted from the FM demodulation circuit by the voltage signal outputted from the phase-shifting circuit.
摘要翻译：要解决的问题：根据光传输线执行动态波长色散补偿。解决方案：再现多通道视频信号的接收装置包括：光电流转换电路，将从发送装置输出的FM调制光信号转换为 FM调制电流信号; 第一电流电压转换电路，将从所述光电流转换电路输出的FM调制电流信号转换为FM调制电压信号; FM解调电路，从第一电流 - 电压转换电路输出的FM调制电压信号再现多声道视频信号; 感应布里渊散射抑制信号提取电路，从所述光电流转换电路的偏置电压提供线提取感应的布里渊散射抑制信号; 以及调整从感应的布里渊散射抑制信号提取电路输出的电压信号的相位的移相电路。移相电路将与FM解调电路输出的电压信号的振幅调制信号成分相反的电压信号输出，接收装置输出通过将从FM解调电路输出的电压信号相乘得到的信号从移相电路输出的电压信号。

9. 发明专利

JP2014110581A Passive optical network 审中-公开
标题翻译：被动光网络
公开(公告)号：JP2014110581A
公开(公告)日：2014-06-12
申请号：JP2012264977
申请日：2012-12-04
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MATSUDA SHOGO , NOGUCHI MASAZUMI , MORITA YOSHINOBU
IPC分类号： H04L12/44
摘要： PROBLEM TO BE SOLVED: To implement efficient power reduction effect by individually setting ONU low power consumption mode duration and an ONU function stop range for certain time zone and for each user, depending on a difference in lifestyle or a network utilization state in each user.SOLUTION: An OLT or ONU comprises: a traffic aggregation table database for aggregating user network access traffic for each user; a per-user traffic statistic database for storing a traffic statistic for certain time zone and for each user; a database for storing an ONU low power consumption mode duration setting schedule generated on the basis of the per-user traffic statistic database; and a database for storing an ONU function stop range setting schedule.
摘要翻译：要解决的问题：根据每个用户的生活习惯差异或网络利用状况，通过单独设置ONU低功耗模式持续时间和特定时区的ONU功能停止范围以及每个用户来实现高效的功率降低效果。解决方案：OLT或ONU包括：业务聚合表数据库，用于为每个用户聚合用户网络接入流量; 每用户流量统计数据库，用于存储针对特定时区和每个用户的流量统计; 数据库，用于存储基于每个用户流量统计数据库生成的ONU低功耗模式持续时间设置调度; 以及用于存储ONU功能停止范围设置时间表的数据库。

10. 发明专利

JP2013255086A MULTIRATE PON SYSTEM AND STATION SIDE AND HOME OPTICAL LINE TERMINATING DEVICE THEREOF 审中-公开
公开(公告)号：JP2013255086A
公开(公告)日：2013-12-19
申请号：JP2012129434
申请日：2012-06-07
申请人： HITACHI LTD
发明人： MATSUNAGA YU , KAZAWA TORU , MORITA YOSHINOBU
IPC分类号： H04L12/44 , H04B10/272
摘要： PROBLEM TO BE SOLVED: To restrain adverse effects of ASE noise in a multi-rate Passive Optical Network (PON) system where home optical line terminating devices (ONUs) having a plurality of transmission rates are accommodated existing alongside each other, thereby increasing the maximum number of branches and the maximum transmission distance per fiber optic line.SOLUTION: A station side optical line terminating device (OLT) 100 comprises an optical amplifier 350 whose gain of optical signal amplification is variable and a wavelength filter 340 whose pass wavelength band is variable. According to the transmission rates and transmission wavelengths of each ONU 110, instructions to change the gain of the optical amplifier 350 and the pass wavelength band of the wavelength filter 340 are given. At this time, a grant generation unit 260 of the OLT 100 assigns a time slot for time division multiplex control to each ONU 110 collectively for each transmission rate and further for each transmission wavelength band, so that the number of times such changes are needed will be reduced.

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