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61. 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。

62. 发明授权

US08861954B2 Burst-mode receiver equipped with optical amplifier, method for controlling optical amplifier, and system 有权
标题翻译：配有光放大器的突发模式接收机，光放大器控制方法及系统
公开(公告)号：US08861954B2
公开(公告)日：2014-10-14
申请号：US13336710
申请日：2011-12-23
申请人： Jun Sugawa , Hiroki Ikeda , Tohru Kazawa
发明人： Jun Sugawa , Hiroki Ikeda , Tohru Kazawa
IPC分类号： H04B17/00 , H04J14/06 , H04J4/00 , H04J14/00 , H04B10/272
CPC分类号： H04B10/272
摘要： To, even when a transmission wavelength varies in each ONU and an optical amplifier gain depends on the wavelength in an OLT equipped with an optical amplifier, prevent the optical amplifier gain from varying in every ONU and thus prevent deterioration of a dynamic range. The OLT estimates a transmission wavelength of each ONU at the time of ONU registration, and retains a correspondence between an ONU identifier and the transmission wavelength. Moreover, for every burst, an injection current to the optical amplifier is adjusted based on a wavelength and optical amplifier characteristic database.
摘要翻译：即使当每个ONU中的传输波长变化并且光放大器增益取决于配备有光放大器的OLT中的波长时，防止光放大器增益在每个ONU中变化，从而防止动态范围的恶化。 OLT估计在ONU注册时每个ONU的传输波长，并保持ONU标识符与传输波长之间的对应关系。此外，对于每个脉冲串，基于波长和光放大器特性数据库调整到光放大器的注入电流。

63. 发明授权

US08712244B2 Communication system and time synchronization method 有权
标题翻译：通信系统和时间同步方法
公开(公告)号：US08712244B2
公开(公告)日：2014-04-29
申请号：US13210165
申请日：2011-08-15
申请人： Makoto Hasegawa , Kazuyori Umematsu , Tohru Kazawa , Atsushi Otani
发明人： Makoto Hasegawa , Kazuyori Umematsu , Tohru Kazawa , Atsushi Otani
IPC分类号： H04J14/08 , H04B10/00
CPC分类号： H04J3/0655 , H04J3/0644 , H04J3/0673 , H04J3/0682
摘要： In a communication system using a PON, time synchronization of a slave device such as a base station is realized with respect to a master device such as an L2SW or the base station. Time information acquired by a GPS satellite is corrected by ranging information of a discovery function of an OLT so as to be reflected on time information of each ONU. A propagation delay from the L2SW to the OLT is obtained with the use of a delay estimation mechanism, a propagation delay from the OLT to the ONU which is obtained by ranging is added to obtain a propagation delay from the L2SW to the ONU. The obtained propagation delay from the L2SW to the ONU is added to the transmitted time stamp value whereby a time stamp value received at a base station or femtocell side becomes a time into which the propagation delay to the ONU is incorporated, and absolute values of clock timers can be synchronized with each other. The addition process can be realized by rewriting the time stamp value of the packet within the OLT or the ONU.
摘要翻译：在使用PON的通信系统中，相对于诸如L2SW或基站的主设备实现诸如基站的从设备的时间同步。由GPS卫星获取的时间信息由OLT的发现功能的测距信息进行校正，以反映在每个ONU的时间信息上。通过使用延迟估计机制获得从L2SW到OLT的传播延迟，通过添加通过测距获得的从OLT到ONU的传播延迟，以获得从L2SW到ONU的传播延迟。所获得的从L2SW到ONU的传播延迟被添加到发送的时间标记值，由此在基站或毫微微小区侧接收的时间标记值变为并入到ONU的传播延迟的时间，并且时钟的绝对值定时器可以彼此同步。可以通过重写OLT或ONU内的分组的时间戳值来实现相加处理。

64. 发明授权

US08654766B2 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：US08654766B2
公开(公告)日：2014-02-18
申请号：US13465356
申请日：2012-05-07
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： H04L12/56 , H04J3/04
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。

65. 发明授权

US08331400B2 Passive optical network (PON) system 失效
标题翻译：无源光网络（PON）系统
公开(公告)号：US08331400B2
公开(公告)日：2012-12-11
申请号：US12656713
申请日：2010-02-16
申请人： Masahiko Mizutani , Takeshi Shibata , Tohru Kazawa , Yoshihiro Ashi , Masanobu Kobayashi , Hideki Endo
发明人： Masahiko Mizutani , Takeshi Shibata , Tohru Kazawa , Yoshihiro Ashi , Masanobu Kobayashi , Hideki Endo
IPC分类号： H04J3/16 , H04J4/00 , H04J14/00 , H04B10/20
CPC分类号： H04Q11/0067 , H04Q2011/0064
摘要： A PON system capable of utilizing the bandwidth of an optical transmission channel in the PON section. In a PON system including an OLT and a plurality of ONUs, the OLT has: a downstream frame processing unit that removes at least part of the header information in a layer 2 header from a downstream frame received from a wide area network, and converts the remaining frame portion into a frame having a header specific to the PON section; and a downstream frame processing unit that extracts a downstream frame portion to be transferred to a user terminal, from a received frame from a PON, and adds the layer 2 header information deleted in the OLT.
摘要翻译：一种能够利用PON部分中的光传输信道的带宽的PON系统。在包括OLT和多个ONU的PON系统中，OLT具有：下游帧处理单元，从从广域网接收到的下行帧中去除层2报头中的头部信息的至少一部分，并将剩余帧部分变成具有对于PON部分特有的报头的帧; 以及从PON的接收帧中提取要传送到用户终端的下行帧部分的下行帧处理单元，并且将删除在OLT中的层2报头信息相加。

66. 发明申请

US20120163809A1 Burst-Mode Receiver Equipped with Optical Amplifier, Method for Controlling Optical Amplifier, and System 有权
标题翻译：配有光放大器的突发模式接收机，控制光放大器和系统的方法
公开(公告)号：US20120163809A1
公开(公告)日：2012-06-28
申请号：US13336710
申请日：2011-12-23
申请人： Jun Sugawa , Hiroki Ikeda , Tohru Kazawa
发明人： Jun Sugawa , Hiroki Ikeda , Tohru Kazawa
IPC分类号： H04J14/02 , H04B10/08 , H04J14/06
CPC分类号： H04B10/272
摘要： To, even when a transmission wavelength varies in each ONU and an optical amplifier gain depends on the wavelength in an OLT equipped with an optical amplifier, prevent the optical amplifier gain from varying in every ONU and thus prevent deterioration of a dynamic range. The OLT estimates a transmission wavelength of each ONU at the time of ONU registration, and retains a correspondence between an ONU identifier and the transmission wavelength. Moreover, for every burst, an injection current to the optical amplifier is adjusted based on a wavelength and optical amplifier characteristic database.
摘要翻译：即使当每个ONU中的传输波长变化并且光放大器增益取决于配备有光放大器的OLT中的波长时，防止光放大器增益在每个ONU中变化，从而防止动态范围的恶化。 OLT估计在ONU注册时每个ONU的传输波长，并保持ONU标识符与传输波长之间的对应关系。此外，对于每个脉冲串，基于波长和光放大器特性数据库调整到光放大器的注入电流。

67. 发明申请

US20120141119A1 OPTICAL ACCESS SYSTEM, OPTICAL NETWORK UNIT, AND OPTICAL LINE TERMINAL 有权
标题翻译：光接入系统，光网络单元和光线终端
公开(公告)号：US20120141119A1
公开(公告)日：2012-06-07
申请号：US13153012
申请日：2011-06-03
申请人： SATOSHI KONNO , Noboru Oosawa , Tohru Kazawa
发明人： SATOSHI KONNO , Noboru Oosawa , Tohru Kazawa
IPC分类号： H04B10/08
CPC分类号： H04L12/12 , H04L12/2885 , H04Q11/0067 , H04Q2011/0064 , H04Q2011/0079 , Y02D50/40
摘要： It is provided an optical access system, comprising an optical line terminal which is coupled to another network and optical network units which are coupled to the optical line terminal and to a plurality of user terminals. Each of the optical network units obtains a capacity of a buffer included in the each of the optical network unit and a link speed between the each of the optical network units and one of the plurality of user terminals that is coupled to the each of the optical network units; determines a sleep time based on the obtained capacity and the obtained link speed in a case where no communication frames are transmitted for a given period of time from any one of the plurality of user terminals and the optical line terminal; and sets in a sleep state for the determined sleep time.
摘要翻译：提供了一种光接入系统，其包括耦合到另一网络的光线路终端和耦合到光线路终端和多个用户终端的光网络单元。每个光网络单元获得包括在每个光网络单元中的缓冲器的容量和每个光网络单元之间的链路速度以及耦合到每个光网络单元中的每一个的多个用户终端中的一个网络单位; 在从所述多个用户终端和所述光线路终端中的任一个发送了一定时间的通信帧的情况下，基于所获得的容量和所获得的链路速度来确定睡眠时间; 并设置睡眠状态以确定睡眠时间。

68. 发明授权

US08184977B2 Optical line terminal capable of active bandwidth allocation for passive optical network system 有权
标题翻译：无线光网络系统有源带宽分配的光线路终端
公开(公告)号：US08184977B2
公开(公告)日：2012-05-22
申请号：US12979871
申请日：2010-12-28
申请人： Tohru Kazawa , Kenichi Sakamoto , Ryosuke Nishino
发明人： Tohru Kazawa , Kenichi Sakamoto , Ryosuke Nishino
IPC分类号： H04J14/00
CPC分类号： H04J3/1694 , H04J2203/0041 , H04J2203/0067 , H04J2203/0091 , H04Q11/0067 , H04Q2011/0064
摘要： In a GPON system conforming to ITU-T Recommendations G.984.3, an optical line terminal is provided which has an active bandwidth allocation function that preferentially puts small bandwidth signals in a particular segment of a frame, e.g., at a head of the frame, to prevent fragmentations that may occur particularly when allocating small bandwidths of about 100 kbits/s.
摘要翻译：在符合ITU-T建议书G.984.3的GPON系统中，提供了一种光线路终端，其具有主动带宽分配功能，其优先将小带宽信号放置在帧的特定段中，例如在帧的头部，以防止在分配大约100kbits / s的小带宽时可能发生的碎片。

69. 发明授权

US08023511B2 Communication system, optical line terminal, and congestion control method 有权
标题翻译：通信系统，光线路终端和拥塞控制方法
公开(公告)号：US08023511B2
公开(公告)日：2011-09-20
申请号：US12489611
申请日：2009-06-23
申请人： Kenta Komiya , Ryosuke Kurata , Tohru Kazawa
发明人： Kenta Komiya , Ryosuke Kurata , Tohru Kazawa
IPC分类号： H04L12/56 , H04H20/71
CPC分类号： H04L12/1881 , H04L12/1877 , H04L49/90 , H04L65/4076 , H04L65/80 , H04N21/4383 , H04Q11/0067 , H04Q2011/0079
摘要： Congestion caused by a large number of IGMP requests sent from set top boxes at channel switching is prevented in an optical line terminal (OLT). An IGMP processing section in the OLT has a delayed data generation threshold and a delayed data transmission threshold. When the number of ONTS participating in a multicast group is increased, the OLT generates a delayed multicast group for video data. The delayed multicast group having a few second delay accommodates a new user. With this, the end time of a highly popular program and a commercial start time are shifted among users to prevent, in the OLT, congestion caused by IGMP requests sent for channel switching at an identical time point.
摘要翻译：在光线路终端（OLT）中，阻止了在信道切换时从机顶盒发送的大量IGMP请求引起的拥塞。 OLT中的IGMP处理部分具有延迟的数据生成阈值和延迟的数据传输阈值。当增加参与组播组的ONTS数量时，OLT会为视频数据生成延迟组播组。具有几秒延迟的延迟多播组适应新用户。由此，高端流行节目和商业开始时间的结束时间在用户之间转移，以防止OLT在同一时间点发送用于频道切换的IGMP请求引起的拥塞。

70. 发明授权

US07962037B2 PON system and optical network unit 有权
标题翻译： PON系统和光网络单元
公开(公告)号：US07962037B2
公开(公告)日：2011-06-14
申请号：US12622118
申请日：2009-11-19
申请人： Masahiko Mizutani , Takeshi Shibata , Tohru Kazawa , Yoshihiro Ashi , Masanobu Kobayashi , Masayuki Takase
发明人： Masahiko Mizutani , Takeshi Shibata , Tohru Kazawa , Yoshihiro Ashi , Masanobu Kobayashi , Masayuki Takase
IPC分类号： H04B10/20 , H04J14/00
CPC分类号： H04J3/1694 , H04L12/185 , H04Q11/0066 , H04Q11/0067 , H04Q2011/0073 , H04Q2011/0079
摘要： Provided is an ONU that suppresses transmission of a useless multicast control message to a PON section and enables a communication bandwidth of the PON section to be effectively used. The ONU of the PON system has a multicast group management table that shows a correspondence between a multicast group identifier and an address of a user terminal participating in a multicast group. When the ONU receives a request message of participation in the multicast group from the user terminal, the ONU registers the correspondence between the multicast group identifier indicated by the received message and the user terminal address. A new received message is deleted without being sent to the OLT if another user terminal address is registered already, along with a correspondence with the same multicast group identifier, in the multicast group management table.
摘要翻译：提供了抑制对PON部分的无用组播控制消息的发送的ONU，能够有效地使用PON部的通信带宽。 PON系统的ONU具有表示组播组标识与参与组播组的用户终端的地址的对应关系的组播组管理表。当ONU从用户终端接收到参与组播组的请求消息时，ONU注册由接收到的消息指示的组播组标识符与用户终端地址之间的对应关系。如果在多播组管理表中已经注册了另一个用户终端地址以及与同一组播组标识符的对应关系，则新的接收到的消息被删除而不被发送到OLT。

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