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1. 发明授权

US08886041B2 Optical line terminal, bandwidth control method and optical network system 有权
标题翻译：光线路终端，带宽控制方式和光网络系统
公开(公告)号：US08886041B2
公开(公告)日：2014-11-11
申请号：US13479825
申请日：2012-05-24
申请人： Takahiro Tanaka , Tohru Kazawa , Shota Takagi
发明人： Takahiro Tanaka , Tohru Kazawa , Shota Takagi
IPC分类号： H04B10/20 , H04J14/08 , H04J14/00 , H04L12/413 , H04Q11/00
CPC分类号： H04L12/413 , H04Q11/0067 , H04Q2011/0064
摘要： An example is a bandwidth control method employed in an optical line terminal including: determining a first time point at which a first optical network unit starts the processing of transitioning between the states in a case where the first optical network unit is to be transitioned between the states; transmitting a state control signal containing the first time point to the first optical network unit in order to control the first optical network unit to start the processing of transitioning between the states; and stopping allocating a bandwidth used to transmit a signal to the optical line terminal to a second optical network unit during a period from the first time point until it is determined that the first optical network unit has finished the processing of transitioning between the states.
摘要翻译：一种示例是在光线路终端中采用的带宽控制方法，包括：确定在第一光网络单元将要在第一光网络单元之间转换的情况下第一光网络单元开始在状态之间转换的处理的第一时间点状态; 向所述第一光网络单元发送包含所述第一时间点的状态控制信号，以控制所述第一光网络单元开始所述状态之间的转换处理; 以及在从所述第一时间点到所述第一光网络单元已经完成所述状态之间的转换处理的结束之后，停止将用于向所述光线路终端发送信号的带宽分配给第二光网络单元。

2. 发明授权

US08705965B2 Method of recovery from sleep state of an ONU in a PON system capable of power saving 失效
标题翻译：从能够省电的PON系统中的ONU的睡眠状态恢复的方法
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。

3. 发明授权

US08189571B2 System apparatus and method for interconnecting TDM and frame/packet communication networks 有权
标题翻译：用于互连TDM和帧/分组通信网络的系统装置和方法
公开(公告)号：US08189571B2
公开(公告)日：2012-05-29
申请号：US11339449
申请日：2006-01-26
申请人： Masahiko Mizutani , Yoshihiro Ashi , Masayuki Takase , Atsushi Iwamura , Akihiko Tanaka , Hideki Endo , Tohru Kazawa
发明人： Masahiko Mizutani , Yoshihiro Ashi , Masayuki Takase , Atsushi Iwamura , Akihiko Tanaka , Hideki Endo , Tohru Kazawa
IPC分类号： H04L12/66
CPC分类号： H04L45/04 , H04J3/1617 , H04J2203/0083
摘要： An interconnection between fully synchronous networks and next-generation frame communications networks is disclosed. A means of bidirectional frame format conversion between a synchronous multiplexing system and a logical multiplexing system is provided, along with a method of transmitting data between different networks on a path as if it were being transmitted in the same network. Further, when converting network control information in an STM network into data suitable for a packet network, even across the boundary of a synchronous multiplexing system and a logical multiplexing system, a unified communication management means is provided over the whole path.
摘要翻译：公开了完全同步网络和下一代帧通信网络之间的互连。提供了在同步多路复用系统和逻辑多路复用系统之间的双向帧格式转换的方法，以及在路径上的不同网络之间传输数据的方法，如同在同一网络中传输一样。此外，当将STM网络中的网络控制信息转换为适用于分组网络的数据时，甚至跨越同步复用系统和逻辑多路复用系统的边界，在整个路径上提供统一的通信管理装置。

4. 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。

5. 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。

6. 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。

7. 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。

8. 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。

9. 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.

10. 发明申请

US20080166127A1 Passive optical network system and wavelength assignment method 有权
标题翻译：无源光网络系统和波长分配方法
公开(公告)号：US20080166127A1
公开(公告)日：2008-07-10
申请号：US11819364
申请日：2007-06-27
申请人： Tohru Kazawa , Kenichi Sakamoto , Ryosuke Nishino
发明人： Tohru Kazawa , Kenichi Sakamoto , Ryosuke Nishino
IPC分类号： H04J14/02
CPC分类号： H04J14/0282 , H04J14/0226 , H04J14/0246 , H04J14/025
摘要： In a PON system with WDM, at the time of initial setting, each ONU negotiates with an OLT, and automatically acquires a wavelength which can be used by the ONU. One wavelength for negotiation of assigned wavelength is fixed as a default, and a newly connected ONU first uses the wavelength. The OLT 200 includes a plurality of light sources for downstream communication. The ONU 300 includes a wavelength variable filter selectively receiving one of wavelengths of downstream communication, and a wavelength variable light source selectively emitting light of one of plural wavelengths for upstream communication. The ONU 300 uses a transmission wavelength (for example, λu32) for negotiation and transmits a wavelength assignment request 1000 to the OLT 200. The OLT 200 selects a wavelength λu1 to be assigned from unused wavelengths, and transmits wavelength information to the ONU 300. The OLT 200 and the ONU 300 communicates using the notified wavelengths.
摘要翻译：在具有WDM的PON系统中，在初始设置时，每个ONU与OLT协商，并自动获取ONU可以使用的波长。用于协调分配波长的一个波长作为默认值固定，并且新连接的ONU首先使用波长。 OLT 200包括用于下游通信的多个光源。 ONU300包括选择性地接收下游通信的波长之一的波长可变滤波器和选择性地发射多个波长中的一个的光的波长可变光源，用于上行通信。 ONU300使用传输波长（例如，lambdau 32）进行协商，并向OLT200发送波长分配请求1000。 OLT200从未使用的波长中选择要分配的波长lambdau 1，并向ONU300发送波长信息。 OLT200和ONU300使用所通知的波长进行通信。

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