公开(公告)号：US08204168B2

公开(公告)日：2012-06-19

申请号：US12349914

申请日：2009-01-07

申请人： Yusuke Yajima ,  Tohru Kazawa ,  Yoshihiro Ashi

发明人： Yusuke Yajima ,  Tohru Kazawa ,  Yoshihiro Ashi

IPC分类号： H04L7/00 ,  H03D3/24

CPC分类号： H04L7/0337 ,  H03L7/0814 ,  H03L7/087 ,  H03L7/091 ,  H04L7/0004 ,  H04L7/046

摘要： A bit synchronization circuit comprising an initial phase determining unit for rapidly determining, during a period of receiving a preamble of burst data, a clock with a phase synchronized with received burst data from among multi-phase clocks having the same frequency as an internal reference clock and a phase tracking unit for modifying the synchronized phase clock responsive to phase variation of received data during a period of receiving a payload of burst data by taking the synchronized phase clock determined by the initial phase determining unit as an initial phase. The bit synchronization circuit retimes burst data with a data retiming clock having a predetermined phase relation with the synchronized phase clock and outputs the burst data in synchronization with the internal reference clock.

摘要翻译： 一种位同步电路，包括初始相位确定单元，用于在从脉冲串数据的前导码接收周期内快速确定具有与内部参考时钟相同频率的多相位时钟中的接收脉冲串数据同步的时钟 以及相位跟踪单元，用于通过将由初始相位确定单元确定的同步相位时钟作为初始相位，在接收到突发数据的有效载荷的周期期间响应于接收数据的相位变化来修正同步相位时钟。 位同步电路使用具有与同步相位时钟具有预定相位关系的数据重新定时时钟重新匹配突发数据，并且与内部参考时钟同步输出脉冲串数据。

公开(公告)号：US07483506B2

公开(公告)日：2009-01-27

申请号：US11299819

申请日：2005-12-13

申请人： Yusuke Yajima ,  Tohru Kazawa ,  Yoshihiro Ashi

发明人： Yusuke Yajima ,  Tohru Kazawa ,  Yoshihiro Ashi

IPC分类号： H04L7/00 ,  H04J3/06

CPC分类号： H04L7/0337 ,  H03L7/0814 ,  H03L7/087 ,  H03L7/091 ,  H04L7/0004 ,  H04L7/046

摘要： A bit synchronization circuit comprising an initial phase determining unit for rapidly determining, during a period of receiving a preamble of burst data, a clock with a phase synchronized with received burst data from among multi-phase clocks having the same frequency as an internal reference clock and a phase tracking unit for modifying the synchronized phase clock responsive to phase variation of received data during a period of receiving a payload of burst data by taking the synchronized phase clock determined by the initial phase determining unit as an initial phase. The bit synchronization circuit retimes burst data with a data retiming clock having a predetermined phase relation with the synchronized phase clock and outputs the burst data in synchronization with the internal reference clock.

摘要翻译： 一种位同步电路，包括初始相位确定单元，用于在从脉冲串数据的前导码接收周期内快速确定具有与内部参考时钟相同频率的多相位时钟中的接收脉冲串数据同步的时钟 以及相位跟踪单元，用于通过将由初始相位确定单元确定的同步相位时钟作为初始相位，在接收到突发数据的有效载荷的周期期间响应于接收数据的相位变化来修正同步相位时钟。 位同步电路使用具有与同步相位时钟具有预定相位关系的数据重新定时时钟重新匹配突发数据，并且与内部参考时钟同步输出脉冲串数据。

公开(公告)号：US5500756A

公开(公告)日：1996-03-19

申请号：US23546

申请日：1993-02-26

申请人： Hideaki Tsushima ,  Shinya Sasaki ,  Yukio Nakano ,  Hiroyuki Nakano ,  Ryoji Tateyari ,  Hironari Matsuda ,  Kenji Tomooka ,  Naohiro Sakakida ,  Shin Nishimura ,  Yoshihiro Yano ,  Youichi Igarashi ,  Satoshi Aoki ,  Masahiro Takatori ,  Tohru Kazawa ,  Yoshihiro Ashi

发明人： Hideaki Tsushima ,  Shinya Sasaki ,  Yukio Nakano ,  Hiroyuki Nakano ,  Ryoji Tateyari ,  Hironari Matsuda ,  Kenji Tomooka ,  Naohiro Sakakida ,  Shin Nishimura ,  Yoshihiro Yano ,  Youichi Igarashi ,  Satoshi Aoki ,  Masahiro Takatori ,  Tohru Kazawa ,  Yoshihiro Ashi

IPC分类号： H04B10/02 ,  H04B10/08 ,  H04B10/17 ,  H04B10/18 ,  H04J14/02 ,  H04Q11/00 ,  H04Q11/04

CPC分类号： H04B10/291 ,  H04B10/0777 ,  H04B10/2537 ,  H04B10/2912 ,  H04B10/2914 ,  H04B10/299 ,  H04J14/02 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0279 ,  H04Q11/0062 ,  H04Q11/0478 ,  H04B2210/003 ,  H04B2210/071 ,  H04B2210/078 ,  H04J14/0226 ,  H04J14/0227 ,  H04J2203/0051 ,  H04Q2011/0069 ,  H04Q2011/0081 ,  H04Q2011/0083

摘要： An optical repeater for realizing transmission of supervisory information of an optical fiber transmission system without the output power of an optical fiber amplifier being reduced, wherein a supervisory optical transmitter and optical receiver with a wavelength which is similar to the wavelength of the pumping light source of the optical fiber amplifier are mounted, and on the input side of the optical repeater, pumping light is multiplexed in the forward direction and a supervisory optical signal, which is multiplexed in wavelength and transmitted, is demultiplexed simultaneously by the first wavelength multi- and demultiplexer and they are received by the supervisory optical receiver, and on the output side of the optical repeater, pumping light is muitiplexed in the reverse direction and a supervisory optical signal outputted from the supervisory optical transmitter is multiplexed by the second wavelength multi- and demultiplexer.

摘要翻译： 用于实现光纤传输系统的监控信息的传输而不减少光纤放大器的输出功率的光中继器，其中，具有与波长相似的波长的监控光发射机和光接收机， 安装光纤放大器，并且在光中继器的输入侧，泵浦光在正向复用，并且以波长和发送的多路复用的监控光信号由第一波长多路复用器和解复用器同时解复用 并且由监控光接收器接收，在光中继器的输出侧，泵浦光在相反方向多路复用，从监控光发送器输出的监控光信号由第二波长多路复用器多路复用。

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。

公开(公告)号：US20090202242A1

公开(公告)日：2009-08-13

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： H04J14/00

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。

公开(公告)号：US08145055B2

公开(公告)日：2012-03-27

申请号：US12389675

申请日：2009-02-20

申请人： Masao Niibe ,  Masahiko Mizutani ,  Tohru Kazawa

发明人： Masao Niibe ,  Masahiko Mizutani ,  Tohru Kazawa

IPC分类号： H04B10/08 ,  H04B17/00

CPC分类号： H04Q11/0067 ,  H04J3/0682 ,  H04J14/0226 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04Q2011/0064 ,  H04Q2011/0079

摘要： In a PON, at the time of ranging, an OLT (a master station) measures an optical level of a signal from at least an ONU (a slave station) capable of communicating at plural transmission speeds. The OLT determines the transmission speed applied to the ONU according to the measured level. Incidentally, the ONU may measure an optical level of a ranging request signal and determine the transmission speed. At a normal operation, when the OLT sends information of plural different transmission speeds to the ONU, a timing when a next frame reaches and transmission speed information are notified to the ONU. Based on the timing, the ONU receives only data of the transmission speed that can be handled. Besides, the OLT switches the transmission speed to receive data based on a grant designation transmitted from the plural ONUs to the OLT.

摘要翻译： 在PON中，在测距时，OLT（主站）测量来自至少能够以多个传输速度进行通信的ONU（从站）的信号的光级。 OLT根据测量级别确定应用于ONU的传输速度。 顺便提及，ONU可以测量测距请求信号的光级，并确定传输速度。 在正常操作中，当OLT向ONU发送多个不同传输速度的信息时，下一帧到达的定时和传输速度信息被通知给ONU。 基于定时，ONU仅接收可以处理的传输速度的数据。 此外，OLT根据从多个ONU发送到OLT的授权指定，切换传输速度以接收数据。

公开(公告)号：US08705965B2

公开(公告)日：2014-04-22

申请号：US12987753

申请日：2011-01-10

申请人： Jun Sugawa ,  Hiroki Ikeda ,  Tohru Kazawa

发明人： Jun Sugawa ,  Hiroki Ikeda ,  Tohru Kazawa

IPC分类号： H04J14/00

CPC分类号： H04Q11/0067 ,  H04Q2011/0064 ,  H04Q2011/0079

摘要： There is a need to recover an ONU from a sleep state for communication with the PON before a specified sleep cancel time in a short period of time without degrading the band use efficiency. An OLT manages an electric state of each ONU connected to a PON. When at least one ONU is in sleep mode, the OLT transmits a grant to allocate a band for a sleep cancel report to the ONU. When the sleep-mode ONU requires communication, the ONU transmits the sleep cancel report to the OLT using the band for the sleep cancel report. When receiving the sleep cancel report, the OLT changes the managed ONU to a normal state and resumes the communication with the PON.

摘要翻译： 需要在短时间内在指定的睡眠取消时间之前，从睡眠状态恢复ONU以与PON进行通信，而不降低频带使用效率。 OLT管理连接到PON的每个ONU的电状态。 当至少一个ONU处于睡眠模式时，OLT向ONU发送用于为睡眠取消报告分配频带的许可。 当睡眠模式ONU需要通信时，ONU使用睡眠取消报告的频带向OLT发送睡眠取消报告。 当接收到睡眠取消报告时，OLT将被管理的ONU改变为正常状态并恢复与PON的通信。

公开(公告)号：US08184975B2

公开(公告)日：2012-05-22

申请号：US12388020

申请日：2009-02-18

申请人： Masao Niibe ,  Tohru Kazawa ,  Takeshi Kiyose ,  Ryosuke Nishino

发明人： Masao Niibe ,  Tohru Kazawa ,  Takeshi Kiyose ,  Ryosuke Nishino

IPC分类号： H04J14/00 ,  H04B10/00

CPC分类号： H04Q11/0067 ,  H04B10/70 ,  H04J3/0652 ,  H04J3/0682 ,  H04Q2011/0064 ,  H04Q2011/0079

摘要： In a passive optical network system in which signals from a master station to plural slave stations are time-division multiplexed and transmitted, the slave stations different in transmission speed are mixedly contained. The master station (OLU) performs ranging for each transmission speed, and grasps all the slave stations different in transmission speed for each transmission speed, and generates a frame including signals of a suitable transmission speed corresponding to each slave station. When the frame is generated, in a downstream signal in which signals of plural transmission speeds are mixed, a dummy signal is set at a place where the transmission speed is changed, and a time necessary to follow a change in level of a received signal due to a change in optical level caused when the transmission speed is changed is secured. Thereby, each ONU avoids a reception error occurring in the time necessary to follow.

摘要翻译： 在从主站到多个从站的信号被时分复用和发送的无源光网络系统中，传输速度不同的从站被混合地包含。 主站（OLU）为每个传输速度执行测距，并且掌握每个传输速度的传输速度不同的所有从站，并且生成包括与每个从站对应的合适传输速度的信号的帧。 当生成帧时，在混合有多个传输速度的信号的下行信号中，将虚拟信号设置在传输速度改变的地方，并且跟随接收信号的电平变化所需的时间 导致当传输速度改变时引起的光学水平的变化。 因此，每个ONU避免在所需的时间内发生的接收错误。

公开(公告)号：US20110211837A1

公开(公告)日：2011-09-01

申请号：US12987753

申请日：2011-01-10

申请人： Jun Sugawa ,  Hiroki Ikeda ,  Tohru Kazawa

发明人： Jun Sugawa ,  Hiroki Ikeda ,  Tohru Kazawa

IPC分类号： H04B10/24

CPC分类号： H04Q11/0067 ,  H04Q2011/0064 ,  H04Q2011/0079

摘要： There is a need to recover an ONU from a sleep state for communication with the PON before a specified sleep cancel time in a short period of time without degrading the band use efficiency. An OLT manages an electric state of each ONU connected to a PON. When at least one ONU is in sleep mode, the OLT transmits a grant to allocate a band for a sleep cancel report to the ONU. When the sleep-mode ONU requires communication, the ONU transmits the sleep cancel report to the OLT using the band for the sleep cancel report. When receiving the sleep cancel report, the OLT changes the managed ONU to a normal state and resumes the communication with the PON.

摘要翻译： 需要在短时间内在指定的睡眠取消时间之前，从睡眠状态恢复ONU以与PON进行通信，而不降低频带使用效率。 OLT管理连接到PON的每个ONU的电状态。 当至少一个ONU处于睡眠模式时，OLT向ONU发送用于为睡眠取消报告分配频带的许可。 当睡眠模式ONU需要通信时，ONU使用睡眠取消报告的频带向OLT发送睡眠取消报告。 当接收到睡眠取消报告时，OLT将被管理的ONU改变为正常状态并恢复与PON的通信。

公开(公告)号：US07936992B2

公开(公告)日：2011-05-03

申请号：US12434959

申请日：2009-05-04

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。