专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

51. 发明授权

US08184975B2 Passive optical network system and optical line terminator 有权
标题翻译：无源光网络系统和光线路终端器
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。

52. 发明申请

US20110211837A1 Method of Recovery From Sleep State of an Onu in a Pon System Capable of Power Saving 失效
标题翻译：从能够节能的Pon系统中的Onu睡眠状态恢复的方法
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。

53. 发明授权

US07936992B2 Apparatus of adjusting optical signal transmission timing 有权
标题翻译：调整光信号传输定时的装置
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。

54. 发明申请

US20100202612A1 OPTICAL NETWORK SYSTEM AND METHOD OF CHANGING ENCRYPTION KEYS 有权
标题翻译：光网络系统和更改加密密钥的方法
公开(公告)号：US20100202612A1
公开(公告)日：2010-08-12
申请号：US12634905
申请日：2009-12-10
申请人： Taiki Nema , Tohru Kazawa , Ryosuke Kurata
发明人： Taiki Nema , Tohru Kazawa , Ryosuke Kurata
IPC分类号： H04L9/00 , H04B10/20
CPC分类号： H04L63/068
摘要： An optical network system including an OLT and ONUs is provided that can prevent the loss of a multicast signal. When receiving an encryption key generation request from the OLT, the ONU generates an encryption key, and transmits the generated encryption key to the OLT. When receiving a notice of timing from the OLT, the ONU updates the encryption key of a belonging group. When receiving a report message from a STB through the ONU, the OLT analyzes the report message, stores a group that the STB belongs to as well as the ONU in a second table, and transmits the encryption key generation request to the ONU. When receiving the encryption key from the ONU, the OLT further stores the encryption key in the second table, and transmits to the ONU a notice of the timing in which the encryption key is valid.
摘要翻译：提供了包括OLT和ONU的光网络系统，其可以防止多播信号的丢失。当从OLT接收到加密密钥生成请求时，ONU生成加密密钥，并将生成的加密密钥发送给OLT。当从OLT接收到定时通知时，ONU更新所属组的加密密钥。当通过ONU从STB接收到报告消息时，OLT分析报告消息，将STB所属的组以及ONU存储在第二表中，并将加密密钥生成请求发送到ONU。当从ONU接收到加密密钥时，OLT还将加密密钥存储在第二表中，并且向ONU发送加密密钥有效的定时的通知。

55. 发明申请

US20090169209A1 Network system, optical line terminating apparatus, and optical network apparatus 有权
标题翻译：网络系统，光线路终端装置和光网络装置
公开(公告)号：US20090169209A1
公开(公告)日：2009-07-02
申请号：US12073949
申请日：2008-03-12
申请人： Toshiki Sugawara , Hiroki Ikeda , Yusuke Yajima , Tohru Kazawa
发明人： Toshiki Sugawara , Hiroki Ikeda , Yusuke Yajima , Tohru Kazawa
IPC分类号： H04J14/00
CPC分类号： H04B10/27 , H04B10/272 , H04J3/0682
摘要： A general object of the present invention is to provide an optical communication system in which an optical transmission power of an optical communication apparatus is controlled to be a required minimum power that apparatuses of all subscribers in the optical communication system meet a prescribed error rate. An optical line terminating apparatus (OLT) transmits data to multiple optical network apparatuses (ONUs) at an optical intensity calculated based on information acquired from the multiple ONUs, which is related to optical intensities of signals that the multiple ONUs receive from the OLT, the optical intensity being calculated so that a minimum optical intensity of the optical intensities of the signals is greater than a predetermined value.
摘要翻译：本发明的一般目的是提供一种光通信系统，其中光通信装置的光传输功率被控制为光通信系统中所有用户的设备满足规定的错误率所需的最小功率。光线路终端装置（OLT）以基于从多个ONU获取的信息计算出的光强度向多个光网络装置（ONU）发送数据，其与多个ONU从OLT接收的信号的光强度相关，计算光强度，使得信号的光强度的最小光强度大于预定值。

56. 发明授权

US07489869B2 Passive optical network system and ranging system thereof 失效
公开(公告)号：US07489869B2
公开(公告)日：2009-02-10
申请号：US11729974
申请日：2007-03-30
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.

57. 发明申请

US20080089686A1 Passive optical network system and ranging system thereof 失效
标题翻译：无源光网络系统及其测距系统
公开(公告)号：US20080089686A1
公开(公告)日：2008-04-17
申请号：US11729974
申请日：2007-03-30
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.
摘要翻译：经由光合成装置与用户侧通信装置连接的站侧通信装置; 向所述用户侧通信设备发送距离测量请求信号; 通过接收距离测量信号来计算来自各个用户侧通信设备的光信号的传输延迟时间，并且包括：阈值控制部分，识别距离测量信号的电平; 信号检测部检测来自阈值控制部的距离测量信号的中断; 确定光信号的发送的定时的发送准许部分，以及在通知距离测量的情况下，存在来自信号检测部的距离测量信号中断的检测通知的复位定时生成部向来自发送授权部分的用户侧通信设备执行，将表示电压电平复位的复位信号发送到阈值控制部分。

58. 发明授权

US07239813B2 Bit synchronization circuit and central terminal for PON systems 有权
标题翻译：用于PON系统的位同步电路和中心终端
公开(公告)号：US07239813B2
公开(公告)日：2007-07-03
申请号：US10654613
申请日：2003-09-04
申请人： Yusuke Yajima , Toshihiro Ashi , Tohru Kazawa
发明人： Yusuke Yajima , Toshihiro Ashi , Tohru Kazawa
IPC分类号： H04B10/00
CPC分类号： H04L7/0338 , H04J3/062 , H04L7/046 , H04L25/061
摘要： A bit synchronization circuit composed of a multiphase data sampling unit for converting each received burst data sets to multiphase data trains, a phase determination unit for generating a control signal indicating an optimum phase data train, an output data selector for selectively passing optimum phase data train indicated by the control signal, and a data synchronization unit for converting the optimum phase data train to a data train in synchronization with a reference clock. The phase determination unit repeatedly detecting the optimum phase data train during the same burst data set is received. When optimum phase varies, the output data selector dynamically switches the optimum phase data train to be supplied to the data synchronization unit.
摘要翻译：一种由多相数据采样单元组成的位同步电路，用于将每个接收到的脉冲串数据组转换为多相数据串;相位确定单元，用于产生指示最佳相位数据列的控制信号;输出数据选择器，用于选择性地通过最佳相位数据列由控制信号指示的数据同步单元，用于将最佳相位数据序列与参考时钟同步地转换为数据列。接收在相同突发数据组中反复检测最佳相位数据序列的相位确定单元。当最佳相位变化时，输出数据选择器动态切换要提供给数据同步单元的最佳相位数据序列。

59. 发明授权

US06301033B1 Optical transmission equipment and optical networks 失效
标题翻译：光传输设备和光网络
公开(公告)号：US06301033B1
公开(公告)日：2001-10-09
申请号：US08872973
申请日：1997-06-11
申请人： Tohru Kazawa
发明人： Tohru Kazawa
IPC分类号： H04J1408
CPC分类号： H04J14/02
摘要： An optical transmission equipment concatenating a combination of a plurality of optical emitters and a plurality of a optical detectors wherein the optical emitters are configured to send optical signals having different wavelengths. Furthermore, the optical detectors are configured to receive optical signals with different wavelengths. The optical emitters are concatenated serially on the same optical axis such that optical emitters with shorter wavelengths are respectively located closer to the receivers and the optical detectors are concatenated serially on the same optical axis such that optical receivers with shorter wavelengths are respectively located closer to the emitters. At least one of the emitted wavelengths or the detected wavelengths can be tuned electrically.
摘要翻译：连接多个光发射器和多个光学检测器的组合的光传输设备，其中光发射器被配置为发送具有不同波长的光信号。此外，光学检测器被配置为接收具有不同波长的光信号。光发射器在相同的光轴上串联连接，使得具有较短波长的光发射器分别位于更接近接收器的位置，并且光学检测器在同一光轴上串联连接，使得具有较短波长的光接收器分别位于更接近发射器。发射波长或检测到的波长中的至少一个可以被电调谐。

60. 发明授权

US5424882A Signal processor for discriminating recording data 失效
标题翻译：用于识别记录数据的信号处理器
公开(公告)号：US5424882A
公开(公告)日：1995-06-13
申请号：US90545
申请日：1993-07-13
申请人： Tohru Kazawa
发明人： Tohru Kazawa
IPC分类号： G11B20/10 , G11B20/14 , H04L7/033 , G11B5/09 , G11B27/10
CPC分类号： G11B20/10037 , G11B20/10009 , G11B20/1403 , H04L7/033
摘要： A signal processing circuit for discriminating recording data is formed by a detector circuit for detecting zero-cross points on an equalized waveform; a PLL for generating a clock at a rate twice the baud rate of a read signal by using the zero-cross timing as an input; a divider for dividing the output of the PLL to generate two baud rate clocks having different phases from each other; and a circuit for selecting one of the two clocks using the waveform of the read signal and for connecting the selected clock to discriminator and decoder circuits. The signal processing circuit also has a table for outputting therefrom a variable branch-metric value which is adaptively controlled using the output of an A/D convertor, internal data contained in the branch-metric table, or the output of the same.
摘要翻译：用于识别记录数据的信号处理电路由用于检测均衡波形上的零交叉点的检测器电路形成; PLL，用于通过使用过零定时作为输入，以读取信号的波特率的两倍的速率产生时钟; 分频器，用于分频PLL的输出以产生彼此具有不同相位的两个波特率时钟; 以及用于使用读取信号的波形来选择两个时钟之一并且用于将所选择的时钟连接到鉴频器和解码器电路的电路。信号处理电路还具有用于从其输出使用A / D转换器的输出，包含在分支量度表中的内部数据或其输出的自适应控制的可变分支度量值的表。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式