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1. 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。

2. 发明专利

JP2011249898A Passive optical network system, transmission light control method, optical multiplex terminator, and optical network terminator 有权
标题翻译：被动光网络系统，传输光控制方法，光纤多路复用终端机和光网络终端机
公开(公告)号：JP2011249898A
公开(公告)日：2011-12-08
申请号：JP2010118034
申请日：2010-05-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TANAKA TAKUHIRO , TOSAKA KENJI , KAZAWA TORU
IPC分类号： H04B10/27 , H04B10/07 , H04B10/272 , H04B10/293 , H04B10/564 , H04B10/572 , H04J14/08 , H04L12/44
摘要： PROBLEM TO BE SOLVED: To provide a passive optical network system capable of eliminating wasteful use of power consumption as much as possible by reducing a transmission power at an OLT per ONU.SOLUTION: An OLT 300 calculates a transmission path loss from a difference between a reception level of an ONU 200 and a transmission optical output power of the OLT itself. The ONU 200 lowers the transmission optical output power based on a calculated value to such a level that reception errors do not occur. In case of the occurrence of a period below or equal to the level that no error occurs (PON link interruption) in the ONU 200 side according to the transmission path loss performed in each ONU 200, a PON link establishment is held by determining the PON link establishment and link interruption based on an existence of a grant signal reception sent by the OLT 300 for a PON link judgement.
摘要翻译：要解决的问题：提供一种无功光网络系统，通过降低每个ONU处的OLT的发送功率，能够尽可能地消除浪费的功率消耗。解决方案：OLT300根据ONU200的接收电平与OLT本身的发送光输出功率之间的差异来计算传输路径损耗。 ONU200将基于计算值的传输光输出功率降低到不发生接收错误的程度。在根据在每个ONU200中执行的传输路径损耗的ONU200侧发生低于或等于无错误发生（PON链路中断）的时间段的情况下，通过确定PON来保持PON链路建立基于由OLT 300发送的用于PON链路判断的授权信号接收的存在的链路建立和链路中断。版权所有（C）2012，JPO＆INPIT

3. 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

4. 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

5. 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

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