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31. 发明授权

US07711268B2 Passive optical network system and ranging system thereof 失效
公开(公告)号：US07711268B2
公开(公告)日：2010-05-04
申请号：US12254590
申请日：2008-10-20
申请人： Tohru Kazawa , Masaki Ohira , Yusuke Yajima , Norihiro Sakamoto
发明人： Tohru Kazawa , Masaki Ohira , Yusuke Yajima , Norihiro Sakamoto
IPC分类号： H04J14/00
CPC分类号： H04J3/1694 , H04J3/0682
摘要： A station-side communication device connected to subscriber-side communication devices via an optical combining device; sending, to the subscriber-side communication devices, a distance measurement request signal; computing transmission delay times of optical signals from the individual subscriber-side communication devices by receiving distance measurement signals, and including: a threshold control part identifying the level of distance measurement signals; a signal detection part detecting breaks in the distance measurement signals from the threshold control part; a transmission granting part determining the timing at which transmission of optical signals is granted, and a reset timing generation part that, there is notification of detection of a break in the distance measurement signal from the signal detection part while it is being notified that distance measurement is carried out to and from the subscriber-side communication devices from the transmission granting part, sends a reset signal indicating that the voltage level is reset to the threshold control part.

32. 发明申请

US20090052897A1 PASSIVE OPTICAL NETWORK SYSTEM AND RANGING SYSTEM THEREOF 失效
公开(公告)号：US20090052897A1
公开(公告)日：2009-02-26
申请号：US12254590
申请日：2008-10-20
申请人： Tohru KAZAWA , Masaki Ohira , Yusuke Yajima , Norihiro Sakamoto
发明人： Tohru KAZAWA , Masaki Ohira , Yusuke Yajima , Norihiro Sakamoto
IPC分类号： H04J14/00
CPC分类号： H04J3/1694 , H04J3/0682
摘要： A station-side communication device connected to subscriber-side communication devices via an optical combining device; sending, to the subscriber-side communication devices, a distance measurement request signal; computing transmission delay times of optical signals from the individual subscriber-side communication devices by receiving distance measurement signals, and including: a threshold control part identifying the level of distance measurement signals; a signal detection part detecting breaks in the distance measurement signals from the threshold control part; a transmission granting part determining the timing at which transmission of optical signals is granted, and a reset timing generation part that, there is notification of detection of a break in the distance measurement signal from the signal detection part while it is being notified that distance measurement is carried out to and from the subscriber-side communication devices from the transmission granting part, sends a reset signal indicating that the voltage level is reset to the threshold control part.

33. 发明申请

US20080089685A1 Apparatus of adjusting optical signal transmission timing 失效
标题翻译：调整光信号传输定时的装置
公开(公告)号：US20080089685A1
公开(公告)日：2008-04-17
申请号：US11730010
申请日：2007-03-29
申请人： Tohru Kazawa , Masaki Ohira , Yusuke Yajima , Akihiko Tsuchiya , Yoshinobu Morita
发明人： Tohru Kazawa , Masaki Ohira , Yusuke Yajima , Akihiko Tsuchiya , Yoshinobu Morita
IPC分类号： H04J14/00
CPC分类号： H04B10/272 , H04J3/0682 , H04J3/1694
摘要： In a light reception element such as an APD (Avalanche Photo Diode) used for receiving a high-speed and weak optical signal, it is possible to prevent the phenomenon of distortion of a signal inputted after a large-level light is received. A PON (Passive Optical Network) system includes an OLT (Optical Line Terminal) which can impartially and effectively transmit light reception data to each ONU (Optical Network Unit). According to a light reception amplitude received by each ONU, an inter-frame gap of an appropriate length is assigned for each ONU. The OLT includes a unit for measuring and accumulating the reception light amplitude and data on the inter-frame gap of an appropriate length decided in advance according to the characteristic of the light reception device and generates a grant value for assuring an inter-frame gap of an appropriate length by using the both information.
摘要翻译：在用于接收高速和弱光信号的APD（雪崩光电二极管）等光接收元件中，可以防止在接收到大电平光之后输入的信号的失真现象。 PON（Passive Optical Network，无源光网络）系统包括能够向每个ONU（Optical Network Unit，光网络单元）公正地有效地发送光接收数据的OLT（Optical Line Terminal）。根据每个ONU接收到的光接收幅度，为每个ONU分配适当长度的帧间间隔。 OLT包括用于根据光接收装置的特性预先确定的适当长度的帧间隙上的接收光幅度和数据的测量和累加单元，并生成用于确保帧间间隔的帧间间隔的准许值通过使用这两个信息适当的长度。

34. 发明授权

US08724995B2 Passive optical network system and operating method thereof 失效
标题翻译：无源光网络系统及其操作方法
公开(公告)号：US08724995B2
公开(公告)日：2014-05-13
申请号：US13201804
申请日：2009-11-09
申请人： Tohru Kazawa , Akihiko Tsuchiya , Norihiro Sakamoto , Yusuke Yajima , Masatoshi Takihiro
发明人： Tohru Kazawa , Akihiko Tsuchiya , Norihiro Sakamoto , Yusuke Yajima , Masatoshi Takihiro
IPC分类号： H04B10/00
CPC分类号： H04L12/44 , H04Q11/0067 , H04Q2011/0079
摘要： Provided is a passive optical network system for operating a mixture of PONs with differing transmission speeds and is capable of reducing power consumption on the basis of the amount of signals being transmitted. The master station of the passive optical network system, which determines the amount and timing of signals sent thereto by each of a plurality of slave stations on the basis of the requests of the plurality of slave stations and receives signals from the plurality of slave stations via an optical fiber network, is equipped with a control unit that determines in each set cycle the amount, transmission timing, and transmission speed of the signals that each slave station is permitted to transmit to said master station on the basis of the amount of signals that each of the plurality of slave stations has requested to transmit, and that notifies such to each slave station. Additionally, each of the plurality of slave stations is equipped with a control unit that transmits signals to the master station at a first transmission speed or a second transmission speed that is faster than the first transmission speed, and is configured to transmit signals with either the first transmission speed or the second transmission speed on the basis of notifications from the master station.
摘要翻译：提供了一种用于操作具有不同传输速度的PON的混合的无源光网络系统，并且能够基于正在传输的信号量来减少功耗。无源光网络系统的主站，其根据多个从站的请求确定发送给多个从站的信号的数量和定时，并且经由光纤网络配备有控制单元，该控制单元在每个设定的周期中根据所述主站的信号量确定每个从站被允许向所述主站发送的信号的量，发送定时和传输速度，多个从站中的每一个已经请求发送，并且通知每个从站。此外，多个从站中的每一个配备有控制单元，该控制单元以比第一传输速度快的第一传输速度或第二传输速度向主站发送信号，并且被配置为：基于来自主站的通知的第一传输速度或第二传输速度。

35. 发明授权

US08374503B2 Passive optical network system and optical line terminal 失效
标题翻译：无源光网络系统和光线路终端
公开(公告)号：US08374503B2
公开(公告)日：2013-02-12
申请号：US13208975
申请日：2011-08-12
申请人： Norihiro Sakamoto , Yusuke Yajima , Tohru Kazawa
发明人： Norihiro Sakamoto , Yusuke Yajima , Tohru Kazawa
IPC分类号： H04J14/00
CPC分类号： H04Q11/0067 , H04J3/0682 , H04L25/063 , H04Q11/0066 , H04Q2011/0064 , H04Q2011/0088 , H04Q2213/1301
摘要： In order to be able to moderate the inclination of the PON burst reception characteristics and to improve the FEC effect, a first offset is used in a ranging window field, and a second offset, which is lower than the first offset value, is used in a burst data field other than the ranging window field.
摘要翻译：为了能够缓和PON突发接收特性的倾斜度并改善FEC效应，在测距窗口场中使用第一偏移量，并且将低于第一偏移值的第二偏移量用于除了测距窗口字段之外的突发数据字段。

36. 发明授权

US08249455B2 Passive optical network system and ranging method 有权
标题翻译：被动光网络系统及测距方法
公开(公告)号：US08249455B2
公开(公告)日：2012-08-21
申请号：US13095004
申请日：2011-04-27
申请人： Tohru Kazawa , Yusuke Yajima , Masaki Oohira
发明人： Tohru Kazawa , Yusuke Yajima , Masaki Oohira
IPC分类号： H04B10/00
CPC分类号： H04J14/0282 , H04J3/0682
摘要： In a WDM-PON system wherein a plurality of ONUs transfer signals by sharing wavelengths, one wavelength dedicated to a ranging procedure is set, and the ranging is performed with only the dedicated wavelength, so as to measure reciprocating delay times. At the other wavelengths, transmission signals from a plurality of ONUs are transferred in time division multiplexing based on the obtained reciprocating delay times. An OLT includes a burst receiver circuit for only the wavelength dedicated to the ranging, and subsequently to the ranging, the OLT adjusts transmission amplitudes and transmission phases for the ONUs, so as to equalize received amplitudes and received phases in the OLT. For this purpose, the OLT includes means for measuring the amplitudes and phases of received signals, as the burst receiver circuit, and it includes a table for managing the received amplitudes and received phases of the respective ONUs.
摘要翻译：在其中多个ONU通过共享波长传送信号的WDM-PON系统中，设置专用于测距过程的一个波长，并且仅用专用波长执行测距，以便测量往复延迟时间。在其他波长处，基于所获得的往复延迟时间，来自多个ONU的传输信号以时分多路传输。 OLT包括仅专用于测距的波长的突发接收器电路，随后在测距中，OLT调整ONU的发射幅度和发射相位，以便均衡OLT中的接收幅度和接收相位。为此，OLT包括用于测量接收信号的幅度和相位的装置作为脉冲串接收器电路，并且其包括用于管理各个ONU的接收幅度和接收相位的表格。

37. 发明授权

US08139950B2 Passive optical network system, optical line terminator and, communication method of passive optical network system 有权
标题翻译：无源光网络系统，光线路终端器，无源光网络系统通信方式
公开(公告)号：US08139950B2
公开(公告)日：2012-03-20
申请号：US12121229
申请日：2008-05-15
申请人： Masao Niibe , Tohru Kazawa , Yusuke Yajima , Takeshi Kiyose , Masahiko Mizutani
发明人： Masao Niibe , Tohru Kazawa , Yusuke Yajima , Takeshi Kiyose , Masahiko Mizutani
IPC分类号： H04B10/00 , H04J14/00 , H04J4/00 , H04J14/08
CPC分类号： H04Q11/0067 , H04Q2011/0064 , H04Q2011/0084
摘要： A passive optical network system (PON) has a plurality of OLTs and ONUs with different transmission rates. OLTs with different transmission rates share information of priority frames and destinations, and determine timing for frame transmission to ONUs so that the signal from each of the OLTs does not collide when multiplied in a splitter. OLTs transmit the data to the ONU as a burst signal to prevent the signals with different rates from colliding. ONU acquires the information of the following burst frames. ONU receives only the signal addressed to the own ONU or with the transmission rate of own ONU, therefore errors in ONUs can be avoided. OLT receives only the signal with the transmission rate of own OLT from ONUs based on the transmission timing from the ONUs shared by the line terminators, errors in OLTs can be avoided.
摘要翻译：无源光网络系统（PON）具有多个具有不同传输速率的OLT和ONU。具有不同传输速率的OLT共享优先级帧和目的地的信息，并确定向ONU发送帧的定时，使得来自每个OLT的信号在分离器中相乘时不会发生冲突。 OLT将数据作为突发信号发送到ONU，以防止具有不同速率的信号相互冲突。 ONU获取以下突发帧的信息。 ONU仅接收寻址到自己的ONU的信号或以自己的ONU的传输速率，因此可以避免ONU中的错误。基于来自线路终端机共享的ONU的传输定时，OLT仅从ONU接收到自身OLT的传输速率的信号，可以避免OLT中的错误。

38. 发明授权

US08107824B2 Passive optical network system and communication method therefor 有权
标题翻译：被动光网络系统及其通信方法
公开(公告)号：US08107824B2
公开(公告)日：2012-01-31
申请号：US12109431
申请日：2008-04-25
申请人： Akihiko Tsuchiya , Yusuke Yajima , Tohru Kazawa
发明人： Akihiko Tsuchiya , Yusuke Yajima , Tohru Kazawa
IPC分类号： H04B10/00
CPC分类号： H04J3/1694 , H04J3/0602 , H04Q11/0067 , H04Q11/0071
摘要： In a passive optical network system in which communication signals from a master station to a plurality of subsidiary stations are multiplexed by time division and transmitted, after converting (modulating) data with a high transmission speed to a low transmission speed, a base speed, in the master station, a header including an identifier destined for each subsidiary station is attached to the data with a low transmission speed and the converted data, respectively, the data and the header being multiplexed by time division inside a frame and transmitted to the subsidiary stations at the base speed. In the subsidiary station having received the concerned frame, only the data destined for the station itself is read, on the basis of the identifier included in the header, and by means of demodulation, the converted data are reconverted to the original high speed data and supplied to a user terminal.
摘要翻译：在从主站到多个子站的通信信号通过时分复用并被发送的无源光网络系统中，在以高传输速度转换（调制）数据到低传输速度之后，将基本速度主站，包含目的地为每个辅助站的标识符的标题以低传输速度附加到数据，并且转换后的数据分别通过帧内的时分复用并发送到辅助站在基本速度。在已经接收到相关帧的子站中，仅基于标题中包含的标识符来读取目的地为站本身的数据，并且通过解调，将转换的数据重新转换为原始高速数据，提供给用户终端。

39. 发明申请

US20100296811A1 OPTICAL ACCESS SYSTEM 失效
标题翻译：光学访问系统
公开(公告)号：US20100296811A1
公开(公告)日：2010-11-25
申请号：US12785693
申请日：2010-05-24
申请人： Masaki Ohira , Tohru Kazawa , Yusuke Yajima , Akihiko Tsuchiya
发明人： Masaki Ohira , Tohru Kazawa , Yusuke Yajima , Akihiko Tsuchiya
IPC分类号： H04B17/00 , H04J14/02
CPC分类号： H04Q11/0067 , H04L1/0009 , H04L1/0025 , H04L1/0057 , H04L1/0075 , H04Q11/0071 , H04Q2011/0079
摘要： There are provided multiple candidates for FEC codes selectable for each of the ONTs. An OLT is provided with: means for storing redundancy and a code length of each FEC code in a table; means for selecting an FEC code; means for encoding or decoding data using the selected FEC code; means for calculating a bandwidth in consideration for the FEC redundancy and the code length with reference to the table during band assignment calculation; and means for notifying the destination ONT of the selected FEC code.
摘要翻译：为每个ONT提供可选择的FEC码的多个候选者。 OLT设置有：用于在表中存储冗余和每个FEC码的码长度的装置; 用于选择FEC码的装置; 用于使用所选择的FEC码对数据进行编码或解码的装置; 用于在频带分配计算期间参照该表计算考虑到FEC冗余和码长的带宽的装置; 以及用于向所述目的地ONT通知所选择的FEC码的装置。

40. 发明申请

US20100080558A1 Passive Optical Network System and Operating Method Thereof 有权
标题翻译：被动光网络系统及其操作方法
公开(公告)号：US20100080558A1
公开(公告)日：2010-04-01
申请号：US12388104
申请日：2009-02-18
申请人： Tohru Kazawa , Yusuke Yajima , Taishi Shinagawa
发明人： Tohru Kazawa , Yusuke Yajima , Taishi Shinagawa
IPC分类号： H04J14/00
CPC分类号： H04J3/0682 , H04J3/1694 , H04Q11/0067 , H04Q2011/0064 , H04Q2213/1301
摘要： The passive optical network includes a master station and slave stations connected via an optical fiber network including an optical splitter and a plurality of optical fibers. The master station includes a bandwidth control unit which decides a volume of a transmission signal to be granted to each slave station in every first period and in accordance with a request from the slave station, and a transmission timing control unit which decides, in one of a plurality of second periods and in accordance with the decided volume of the signal, transmission timing in which the slave station should transmit a signal. When the signal is to be transmitted by division over the plurality of second periods, the bandwidth control unit or the transmission timing control unit is controlled based on a volume of a signal to be attached by division processing, so that the granted signal can be transmitted in the first period.
摘要翻译：无源光网络包括通过包括光分路器和多个光纤的光纤网络连接的主站和从站。主站包括：带宽控制单元，其根据来自所述从站的请求，决定在每个第一周期中向每个从站授予的发送信号的音量;以及发送定时控制单元，其中，多个第二周期，并且根据确定的信号音量，从站应发送信号的发送定时。当通过多个第二周期的分割来发送信号时，基于要通过分割处理附加的信号的音量来控制带宽控制单元或发送定时控制单元，从而可以发送所允许的信号在第一时期。

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