公开(公告)号：US10686520B2

公开(公告)日：2020-06-16

申请号：US15777098

申请日：2016-11-22

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Takuya Oda ,  Tetsuro Inui ,  Akira Hirano ,  Wataru Imajuku ,  Shoukei Kobayashi ,  Takafumi Tanaka ,  Yutaka Miyamoto ,  Hidehiko Takara

IPC分类号： H04B10/079 ,  H04B10/2581 ,  H04J14/00 ,  H04B10/077 ,  G02B6/02 ,  H04J14/02 ,  H04B10/54

摘要： A transmission quality estimation system includes, three or more nodes and a transmission quality estimation device configured to estimate, transmission quality. A multi-core fiber having a plurality of cores, the multi-core fiber being used in at least a partial segment of a connection between the nodes. A node of the nodes includes a core connection unit configured to drop, add or relay light transmitted from, to or to each of to the plurality of cores of the multi-core fiber. The transmission quality estimation device includes an estimation unit configured to estimate transmission quality between the nodes on the basis of a transmission quality measurement light dropped by the core connection unit.

公开(公告)号：US10511381B2

公开(公告)日：2019-12-17

申请号：US15778011

申请日：2016-11-22

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Takuya Oda ,  Tetsuro Inui ,  Akira Hirano ,  Wataru Imajuku ,  Shoukei Kobayashi ,  Takafumi Tanaka ,  Yutaka Miyamoto ,  Hidehiko Takara

IPC分类号： H04B10/07 ,  H04B10/077 ,  H04L12/437 ,  H04B10/25 ,  H04J14/02 ,  G02B6/02 ,  H04B10/075 ,  H04B10/2575

摘要： A communication system includes three or more nodes, and a multi-core fiber having a plurality of cores, the multi-core fiber being used in at least a partial segment of a connection between the nodes, wherein each of nodes includes: a fault information transmitting device configured to transmit fault information indicating that a fault has occurred in a communication path between one node and another node of the nodes when it is detected that it is not possible to perform communication between the one node and the another node; and a fault location specifying device configured to specify a section between nodes in which a fault has occurred on the basis of the fault information received from the fault information transmitting device provided in each of the nodes.

公开(公告)号：US11108208B2

公开(公告)日：2021-08-31

申请号：US15778541

申请日：2016-11-22

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Takuya Oda ,  Tetsuro Inui ,  Akira Hirano ,  Wataru Imajuku ,  Shoukei Kobayashi ,  Takafumi Tanaka ,  Yutaka Miyamoto ,  Hidehiko Takara

IPC分类号： H01S3/067 ,  H04B10/291 ,  H01S3/16 ,  H04B10/2581 ,  H01S3/094 ,  G02F1/35 ,  H01S3/30

摘要： An optical amplification system includes: three or more nodes; a multi-core fiber having a plurality of cores, the multi-core fiber being used in at least a partial segment of the connection between the nodes; an amplification light input unit configured to input amplification light to a core of the plurality of cores of the multi-core fiber; an amplification unit configured to amplify communication light transmitted through at least one core of the plurality of cores of the multi-core fiber using the amplification light, the amplification unit being provided in the nodes or between the nodes; and an amplification light coupling unit configured to couple the amplification light input by the amplification light input unit to the amplification unit.

公开(公告)号：US10637568B2

公开(公告)日：2020-04-28

申请号：US15777098

申请日：2016-11-22

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Takuya Oda ,  Tetsuro Inui ,  Akira Hirano ,  Wataru Imajuku ,  Shoukei Kobayashi ,  Takafumi Tanaka ,  Yutaka Miyamoto ,  Hidehiko Takara

IPC分类号： H04B10/079 ,  H04B10/2581 ,  H04J14/00 ,  H04B10/077 ,  G02B6/02 ,  H04J14/02 ,  H04B10/54

摘要： A transmission quality estimation system includes, three or more nodes and a transmission quality estimation device configured to estimate, transmission quality. A multi-core fiber having a plurality of cores, the multi-core fiber being used in at least a partial segment of a connection between the nodes. A node of the nodes includes a core connection unit configured to drop, add or relay light transmitted from, to or to each of to the plurality of cores of the multi-core fiber. The transmission quality estimation device includes an estimation unit configured to estimate transmission quality between the nodes on the basis of a transmission quality measurement light dropped by the core connection unit.

公开(公告)号：US10527781B2

公开(公告)日：2020-01-07

申请号：US15776566

申请日：2016-11-22

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Takuya Oda ,  Tetsuro Inui ,  Akira Hirano ,  Wataru Imajuku ,  Shoukei Kobayashi ,  Takafumi Tanaka ,  Yutaka Miyamoto ,  Hidehiko Takara

IPC分类号： G02B6/02 ,  G02B6/26 ,  H04B10/27 ,  H04B10/2581 ,  H04J14/02 ,  H04J14/04

摘要： A communication system includes three or more nodes and a multi-core fiber having a plurality of cores, the multi-core fiber being used in at least a partial segment of the connection between the nodes is provided. One node of the nodes is connected to the multi-core fiber and includes a connector configured to add and drop a signal to and from an allocated core exclusively allocated from among the cores as a communication path between the one node and another node of the nodes and/or configured to relay a signal transmitted through another core of the cores allocated for communication between other nodes in the multi-core fiber connected to the one node, and a relative positional relationship between a connection position of the allocated core in which a signal is added or dropped in the connector and a connection position of another core in which a signal is relayed in the connector is the same for all of the nodes connected to the multi-core fiber.