公开(公告)号：US06987903B2

公开(公告)日：2006-01-17

申请号：US11101518

申请日：2005-04-08

申请人： Ichiro Nakajima ,  Hiroaki Tomofuji ,  Takeshi Sakamoto ,  Yuji Shimada

发明人： Ichiro Nakajima ,  Hiroaki Tomofuji ,  Takeshi Sakamoto ,  Yuji Shimada

IPC分类号： G02B6/28

CPC分类号： H04B10/25253

摘要： An optical transmission network includes a first dispersion compensator arranged in a maximum dispersion span having a maximum dispersion value and searched out from within a maximum dispersion route having a maximum dispersion value from among routes of non-regeneration intervals within which a dispersion value before dispersion compensation does not satisfy an upper limit of a dispersion tolerance, and a second dispersion compensator arranged in a maximum dispersion span having a maximum dispersion value searched out from within a maximum dispersion route having a maximum dispersion value from among the routes when a dispersion compensator is successively arranged until a route of a non-regeneration interval within which a dispersion value of a certain channel does not satisfy the dispersion tolerance does not remain any more based on the dispersion value after the dispersion compensation with respect to the searched out maximum dispersion span. The dispersion compensation amounts of the first and second dispersion compensators are such that, when the dispersion compensation amount of the maximum dispersion span in which the first and second dispersion compensators are arranged is successively increased, the span has a residual dispersion value equal to or higher than a fixed range and the maximum dispersion route which relates to the spans has a residual dispersion value which satisfies the dispersion tolerance or the span has a residual dispersion value which is within the fixed range.

摘要翻译： 光传输网络包括布置在具有最大色散值的最大色散跨度中的第一色散补偿器，并且从在非再生间隔的路径内具有最大色散值的最大色散路径内搜索出的第一色散补偿器，其中色散补偿之前的色散值 不满足色散公差的上限，并且在色散补偿器连续地从路径中具有最大色散值的最大色散路径中搜索出的具有最大色散值的最大色散范围内的第二色散补偿器 排列直到某个通道的色散值不满足色散容限的非再生间隔的路径基于相对于搜索出的最大色散跨度的色散补偿之后的色散值不再存在。 第一和第二色散补偿器的色散补偿量使得当排列第一和第二色散补偿器的最大色散跨度的色散补偿量依次增加时，跨度具有等于或等于更高的残余色散值 与固定范围相关联的最大色散路径与跨度相关的最大色散路径具有满足色散公差或跨度的残留色散值具有在固定范围内的残留色散值。

公开(公告)号：US07286758B2

公开(公告)日：2007-10-23

申请号：US11332860

申请日：2006-01-13

申请人： Yuji Shimada ,  Hiroaki Tomofuji ,  Takuji Maeda ,  Takeshi Sakamoto ,  Ichiro Nakajima

发明人： Yuji Shimada ,  Hiroaki Tomofuji ,  Takuji Maeda ,  Takeshi Sakamoto ,  Ichiro Nakajima

IPC分类号： H04B10/08 ,  H04B10/02

CPC分类号： H04B10/07955 ,  H04B1/745 ,  H04B10/032 ,  H04B10/077

摘要： A method for switching a transmission route in an optical network. A regenerator station extracts a main signal, and detects the input level of the main signal. When the input level falls below a threshold, the regenerator station determines that a failure occurs, and stops output of a main signal from the regenerator station, and transmits a control signal indicating occurrence of the failure to a receiver station, which separates the control signal from a main signal transmitted thereto, detects the input level of the main signal at the receiver station, analyzes the separated control signal, and determines whether or not a failure occurs. When the input level of the main signal at the receiver station falls below a threshold, or when the separated control signal indicates occurrence of a failure, the receiver station detects the occurrence of the failure, and switches the transmission route.

摘要翻译： 一种在光网络中切换传输路由的方法。 再生器站提取主信号，并检测主信号的输入电平。 当输入电平低于阈值时，再生器站确定发生故障，并且停止来自再生站的主信号的输出，并将指示故障发生的控制信号发送到接收站，该接收机将控制信号 从发送到其的主信号，检测接收站处的主信号的输入电平，分析分离的控制信号，并确定是否发生故障。 当接收站的主信号的输入电平低于阈值时，或当分离的控制信号表示发生故障时，接收站检测到故障的发生，并切换传输路由。

公开(公告)号：US20050175279A1

公开(公告)日：2005-08-11

申请号：US11101518

申请日：2005-04-08

申请人： Ichiro Nakajima ,  Hiroaki Tomofuji ,  Takeshi Sakamoto ,  Yuji Shimada

发明人： Ichiro Nakajima ,  Hiroaki Tomofuji ,  Takeshi Sakamoto ,  Yuji Shimada

IPC分类号： H04B10/2507 ,  H04B10/07 ,  H04B10/2525 ,  H04B10/27 ,  H04B10/275 ,  H04B10/29 ,  H04J14/00 ,  H04J14/02 ,  G02B6/28

CPC分类号： H04B10/25253

摘要： An optical transmission network includes a first dispersion compensator arranged in a maximum dispersion span having a maximum dispersion value and searched out from within a maximum dispersion route having a maximum dispersion value from among routes of non-regeneration intervals within which a dispersion value before dispersion compensation does not satisfy an upper limit of a dispersion tolerance, and a second dispersion compensator arranged in a maximum dispersion span having a maximum dispersion value searched out from within a maximum dispersion route having a maximum dispersion value from among the routes when a dispersion compensator is successively arranged until a route of a non-regeneration interval within which a dispersion value of a certain channel does not satisfy the dispersion tolerance does not remain any more based on the dispersion value after the dispersion compensation with respect to the searched out maximum dispersion span. The dispersion compensation amounts of the first and second dispersion compensators are such that, when the dispersion compensation amount of the maximum dispersion span in which the first and second dispersion compensators are arranged is successively increased, the span has a residual dispersion value equal to or higher than a fixed range and the maximum dispersion route which relates to the spans has a residual dispersion value which satisfies the dispersion tolerance or the span has a residual dispersion value which is within the fixed range.

摘要翻译： 光传输网络包括布置在具有最大色散值的最大色散跨度中的第一色散补偿器，并且从在非再生间隔的路径内具有最大色散值的最大色散路径内搜索出的第一色散补偿器，其中色散补偿之前的色散值 不满足色散公差的上限，并且在色散补偿器连续地从线路中具有最大色散值的最大色散路径中搜索出的具有最大色散值的最大色散范围内的第二色散补偿器 排列直到某个通道的色散值不满足色散容限的非再生间隔的路径基于相对于搜索出的最大色散跨度的色散补偿之后的色散值不再存在。 第一和第二色散补偿器的色散补偿量使得当排列第一和第二色散补偿器的最大色散跨度的色散补偿量依次增加时，跨度具有等于或等于更高的残余色散值 与固定范围相关联的最大色散路径与跨度相关的最大色散路径具有满足色散公差或跨度的残留色散值具有在固定范围内的残留色散值。

公开(公告)号：US20060188253A1

公开(公告)日：2006-08-24

申请号：US11332860

申请日：2006-01-13

申请人： Yuji Shimada ,  Hiroaki Tomofuji ,  Takuji Maeda ,  Takeshi Sakamoto ,  Ichiro Nakajima

发明人： Yuji Shimada ,  Hiroaki Tomofuji ,  Takuji Maeda ,  Takeshi Sakamoto ,  Ichiro Nakajima

IPC分类号： H04B10/08

CPC分类号： H04B10/07955 ,  H04B1/745 ,  H04B10/032 ,  H04B10/077

摘要： A method for switching a transmission route in an optical network. A regenerator station extracts a main signal, and detects the input level of the main signal. When the input level falls below a threshold, the regenerator station determines that a failure occurs, and stops output of a main signal from the regenerator station, and transmits a control signal indicating occurrence of the failure to a receiver station, which separates the control signal from a main signal transmitted thereto, detects the input level of the main signal at the receiver station, analyzes the separated control signal, and determines whether or not a failure occurs. When the input level of the main signal at the receiver station falls below a threshold, or when the separated control signal indicates occurrence of a failure, the receiver station detects the occurrence of the failure, and switches the transmission route.

摘要翻译： 一种在光网络中切换传输路由的方法。 再生器站提取主信号，并检测主信号的输入电平。 当输入电平低于阈值时，再生器站确定发生故障，并且停止来自再生站的主信号的输出，并将指示故障发生的控制信号发送到接收站，该接收机将控制信号 从发送到其的主信号，检测接收站处的主信号的输入电平，分析分离的控制信号，并确定是否发生故障。 当接收站的主信号的输入电平低于阈值时，或当分离的控制信号表示发生故障时，接收站检测到故障的发生，并切换传输路由。

公开(公告)号：US07394951B2

公开(公告)日：2008-07-01

申请号：US10436076

申请日：2003-05-13

申请人： Takuji Maeda ,  Hiroaki Tomofuji ,  Yuji Shimada

发明人： Takuji Maeda ,  Hiroaki Tomofuji ,  Yuji Shimada

IPC分类号： G02B6/12

CPC分类号： H04B10/2931 ,  H04J14/0201 ,  H04J14/0212 ,  H04J14/0221

摘要： In an optical signal level control apparatus used in a WDM system, the amount of circuitry per wavelength is reduced. Optical power level is detected on the output side of a variable optical attenuator, and the amount of attenuation in the variable optical attenuator is adjusted so that the output level becomes equal to a constant value L1. At this time, if the detected level is lower than a threshold value Th0 or Th-d, it is determined that a signal off condition has occurred, and the amount of attenuation is set to a constant value A1. The amount of attenuation, A1, is chosen to be sufficiently larger than the amount of attenuation used in the output level constant control but small enough to be able to detect the restoration of the signal. When the amount of attenuation is being held at the constant value A1, if the output level is restored to a level higher than the threshold value Th0 or Th1 (Th1

摘要翻译： 在WDM系统中使用的光信号电平控制装置中，每波长的电路量减少。 在可变光衰减器的输出侧检测到光功率电平，并且调节可变光衰减器中的衰减量，使得输出电平变为等于常数值L1。 此时，如果检测到的电平低于阈值Th0或Th-d，则确定已经发生信号关闭状态，并将衰减量设定为常数值A1。 衰减量A1被选择为足够大于在输出电平常数控制中使用的衰减量，但足够小以能够检测信号的恢复。 当衰减量保持在恒定值A1时，如果输出电平恢复到高于阈值Th0或Th1（Th1

公开(公告)号：US20090226167A1

公开(公告)日：2009-09-10

申请号：US12399275

申请日：2009-03-06

申请人： Miki Onaka ,  Yasushi Sugaya ,  Takahumi Terahara ,  Satoru Okano ,  Takehiro Fujita ,  Hiroaki Tomofuji ,  Ichiro Nakajima

发明人： Miki Onaka ,  Yasushi Sugaya ,  Takahumi Terahara ,  Satoru Okano ,  Takehiro Fujita ,  Hiroaki Tomofuji ,  Ichiro Nakajima

IPC分类号： H04J14/00

CPC分类号： H04J14/0221 ,  H04J14/0204 ,  H04J14/0212 ,  H04J14/0219

摘要： An optical node apparatus according to the present invention amplifies a WDM signal light input to an input port, and thereafter, branches the amplified WDM signal light by an optical branching coupler to send the branched lights to first and second optical paths, and selects the light propagated through the first optical path by an optical switch to amplify the selected light by a post-amplifier, thereby outputting the amplified light from an output port, when the optical node apparatus is operated as an optical amplification repeating node. When the operational state is upgraded to an optical add/drop multiplexing node, an OADM section is connected between a set of connecting ports on the second optical path, and the adjustment of the OADM section is performed utilizing the WDM signal light branched by the optical branching coupler, and thereafter, the switching of the optical switch is performed to select the light on the second optical path side. As a result, since the switching the operational state from the optical amplification repeating node to the OADM node can be performed in a short time, it becomes possible to provide the continued communication service at the low initial installation cost.

摘要翻译： 根据本发明的光节点装置放大输入到输入端口的WDM信号光，然后通过光分路耦合器对放大的WDM信号光进行分支，以将分支光发送到第一和第二光路，并选择光 通过光开关通过第一光路传播，以通过后置放大器放大所选择的光，从而当光节点装置作为光放大重复节点工作时，从输出端口输出放大的光。 当操作状态升级为光分插复用节点时，OADM部分连接在第二光路上的一组连接端口之间，并且利用由光学分支的WDM信号光进行OADM部分的调整 分支耦合器，然后进行光开关的切换以选择第二光路侧的光。 结果，由于可以在短时间内将操作状态从光放大重复节点切换到OADM节点，所以可以以低的初始安装成本提供持续的通信服务。

公开(公告)号：US20080002978A1

公开(公告)日：2008-01-03

申请号：US11319376

申请日：2005-12-29

申请人： Miki Onaka ,  Yasushi Sugaya ,  Takahumi Terahara ,  Satoru Okano ,  Takehiro Fujita ,  Hiroaki Tomofuji ,  Ichiro Nakajima

发明人： Miki Onaka ,  Yasushi Sugaya ,  Takahumi Terahara ,  Satoru Okano ,  Takehiro Fujita ,  Hiroaki Tomofuji ,  Ichiro Nakajima

IPC分类号： H04B10/16

CPC分类号： H04J14/0221 ,  H04J14/0204 ,  H04J14/0212 ,  H04J14/0219

摘要： An optical node apparatus according to the present invention amplifies a WDM signal light input to an input port, and thereafter, branches the amplified WDM signal light by an optical branching coupler to send the branched lights to first and second optical paths, and selects the light propagated through the first optical path by an optical switch to amplify the selected light by a post-amplifier, thereby outputting the amplified light from an output port, when the optical node apparatus is operated as an optical amplification repeating node. When the operational state is upgraded to an optical add/drop multiplexing node, an OADM section is connected between a set of connecting ports on the second optical path, and the adjustment of the OADM section is performed utilizing the WDM signal light branched by the optical branching coupler, and thereafter, the switching of the optical switch is performed to select the light on the second optical path side. As a result, since the switching the operational state from the optical amplification repeating node to the OADM node can be performed in a short time, it becomes possible to provide the continued communication service at the low initial installation cost.

摘要翻译： 根据本发明的光节点装置放大输入到输入端口的WDM信号光，然后通过光分路耦合器对放大的WDM信号光进行分支，以将分支光发送到第一和第二光路，并选择光 通过光开关通过第一光路传播，以通过后置放大器放大所选择的光，从而当光节点装置作为光放大重复节点工作时，从输出端口输出放大的光。 当操作状态升级为光分插复用节点时，OADM部分连接在第二光路上的一组连接端口之间，并且利用由光学分支的WDM信号光进行OADM部分的调整 分支耦合器，然后进行光开关的切换以选择第二光路侧的光。 结果，由于可以在短时间内将操作状态从光放大重复节点切换到OADM节点，所以可以以低的初始安装成本提供持续的通信服务。

公开(公告)号：US07650072B2

公开(公告)日：2010-01-19

申请号：US12399275

申请日：2009-03-06

申请人： Miki Onaka ,  Yasushi Sugaya ,  Takahumi Terahara ,  Satoru Okano ,  Takehiro Fujita ,  Hiroaki Tomofuji ,  Ichiro Nakajima

发明人： Miki Onaka ,  Yasushi Sugaya ,  Takahumi Terahara ,  Satoru Okano ,  Takehiro Fujita ,  Hiroaki Tomofuji ,  Ichiro Nakajima

IPC分类号： H04B10/00 ,  H04B10/08 ,  H04B10/12 ,  H04J14/02

CPC分类号： H04J14/0221 ,  H04J14/0204 ,  H04J14/0212 ,  H04J14/0219

摘要： An optical node apparatus according to the present invention amplifies a WDM signal light input to an input port, and thereafter, branches the amplified WDM signal light by an optical branching coupler to send the branched lights to first and second optical paths, and selects the light propagated through the first optical path by an optical switch to amplify the selected light by a post-amplifier, thereby outputting the amplified light from an output port, when the optical node apparatus is operated as an optical amplification repeating node. When the operational state is upgraded to an optical add/drop multiplexing node, an OADM section is connected between a set of connecting ports on the second optical path, and the adjustment of the OADM section is performed utilizing the WDM signal light branched by the optical branching coupler, and thereafter, the switching of the optical switch is performed to select the light on the second optical path side. As a result, since the switching the operational state from the optical amplification repeating node to the OADM node can be performed in a short time, it becomes possible to provide the continued communication service at the low initial installation cost.

摘要翻译： 根据本发明的光节点装置放大输入到输入端口的WDM信号光，然后通过光分路耦合器对放大的WDM信号光进行分支，以将分支光发送到第一和第二光路，并选择光 通过光开关通过第一光路传播，以通过后置放大器放大所选择的光，从而当光节点装置作为光放大重复节点工作时，从输出端口输出放大的光。 当操作状态升级为光分插复用节点时，OADM部分连接在第二光路上的一组连接端口之间，并且利用由光学分支的WDM信号光进行OADM部分的调整 分支耦合器，然后进行光开关的切换以选择第二光路侧的光。 结果，由于可以在短时间内将操作状态从光放大重复节点切换到OADM节点，所以可以以低的初始安装成本提供持续的通信服务。

公开(公告)号：US07522839B2

公开(公告)日：2009-04-21

申请号：US11319376

申请日：2005-12-29

申请人： Miki Onaka ,  Yasushi Sugaya ,  Takahumi Terahara ,  Satoru Okano ,  Takehiro Fujita ,  Hiroaki Tomofuji ,  Ichiro Nakajima

发明人： Miki Onaka ,  Yasushi Sugaya ,  Takahumi Terahara ,  Satoru Okano ,  Takehiro Fujita ,  Hiroaki Tomofuji ,  Ichiro Nakajima

IPC分类号： H04B10/08 ,  H04J14/02

CPC分类号： H04J14/0221 ,  H04J14/0204 ,  H04J14/0212 ,  H04J14/0219

摘要： An optical node apparatus according to the present invention amplifies a WDM signal light input to an input port, and thereafter, branches the amplified WDM signal light by an optical branching coupler to send the branched lights to first and second optical paths, and selects the light propagated through the first optical path by an optical switch to amplify the selected light by a post-amplifier, thereby outputting the amplified light from an output port, when the optical node apparatus is operated as an optical amplification repeating node. When the operational state is upgraded to an optical add/drop multiplexing node, an OADM section is connected between a set of connecting ports on the second optical path, and the adjustment of the OADM section is performed utilizing the WDM signal light branched by the optical branching coupler, and thereafter, the switching of the optical switch is performed to select the light on the second optical path side. As a result, since the switching the operational state from the optical amplification repeating node to the OADM node can be performed in a short time, it becomes possible to provide the continued communication service at the low initial installation cost.

摘要翻译： 根据本发明的光节点装置放大输入到输入端口的WDM信号光，然后通过光分路耦合器对放大的WDM信号光进行分支，以将分支光发送到第一和第二光路，并选择光 通过光开关通过第一光路传播，以通过后置放大器放大所选择的光，从而当光节点装置作为光放大重复节点工作时，从输出端口输出放大的光。 当操作状态升级为光分插复用节点时，OADM部分连接在第二光路上的一组连接端口之间，并且利用由光学分支的WDM信号光进行OADM部分的调整 分支耦合器，然后进行光开关的切换以选择第二光路侧的光。 结果，由于可以在短时间内将操作状态从光放大重复节点切换到OADM节点，所以可以以低的初始安装成本提供持续的通信服务。

公开(公告)号：US07756416B2

公开(公告)日：2010-07-13

申请号：US10437224

申请日：2003-05-14

申请人： Hiroaki Tomofuji ,  Takuji Maeda ,  Yuji Shimada

发明人： Hiroaki Tomofuji ,  Takuji Maeda ,  Yuji Shimada

IPC分类号： G02F1/00 ,  H04J14/00

CPC分类号： H04J14/0297 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0252 ,  H04J14/0283 ,  H04J14/0284 ,  H04J14/0295

摘要： The present invention relates to prevention of erroneous connection in an optical network and, in particular, it provides an optical communication node having route switching function as well as an optical network system using the same in a wavelength division multiplex (WDM) network system. There is provided an optical communication node that is connected to a specific optical path in an optical network, the optical communication node having: an external network that is placed thereunder; and an interruption part for interrupting connection between the optical network and the external network, wherein the interruption part interrupts the connection until a sequence of changing a route is completed when the route setting of the optical path is changed.

摘要翻译： 本发明涉及防止光网络中的错误连接，特别是提供一种具有路由切换功能的光通信节点以及在波分多路复用（WDM）网络系统中使用该光通信节点的光网络系统。 提供了一种光通信节点，其连接到光网络中的特定光路，所述光通信节点具有：放置在其下的外部网络; 以及用于中断光网络和外部网络之间的连接的中断部分，其中，当光路的路由设置改变时，中断部分中断连接，直到改变路由的顺序完成。