公开(公告)号：US20180375579A1

公开(公告)日：2018-12-27

申请号：US15775658

申请日：2016-11-22

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takuya ODA ,  Tetsuro INUI ,  Akira HIRANO ,  Wataru IMAJUKU ,  Shoukei KOBAYASHI ,  Takafumi TANAKA ,  Yutaka MIYAMOTO ,  Hidehiko TAKARA

IPC: H04B10/2581 ,  H04J14/02 ,  H04B10/29

Abstract: A communication system includes three or more nodes and a multi-core fiber having a plurality of cores and being used in at least a partial segment of the connection between the nodes. 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 for communication between the one node and another node of the nodes and/or configured to relay a signal transmitted through another core allocated to communication between the other nodes in multi-core fibers connected to the one node.

公开(公告)号：US20180359024A1

公开(公告)日：2018-12-13

申请号：US15778910

申请日：2016-11-22

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takuya ODA ,  Tetsuro INUI ,  Akira HIRANO ,  Wataru IMAJUKU ,  Shoukei KOBAYASHI ,  Takafumi TANAKA ,  Yutaka MIYAMOTO ,  Hidehiko TAKARA

IPC: H04B10/077 ,  H04B10/2581 ,  H04J14/02

CPC classification number: H04B10/0771 ,  H04B10/077 ,  H04B10/2581 ,  H04J14/00 ,  H04J14/02 ,  H04L12/437

Abstract: A communication system which 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 a connection between the nodes; a detection signal output unit configured to output a fault detection signal transmitted by the core provided in the multi-core fiber configured to connect together the nodes; and a fault detection unit configured to determine whether a fault has occurred between the nodes on the basis of a detection result of the fault detection signal.

公开(公告)号：US20180341060A1

公开(公告)日：2018-11-29

申请号：US15776566

申请日：2016-11-22

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takuya ODA ,  Tetsuro INUI ,  Akira HIRANO ,  Wataru IMAJUKU ,  Shoukei KOBAYASHI ,  Takafumi TANAKA ,  Yutaka MIYAMOTO ,  Hidehiko TAKARA

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

Abstract: 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.

公开(公告)号：US20180337726A1

公开(公告)日：2018-11-22

申请号：US15777098

申请日：2016-11-22

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takuya ODA ,  Tetsuro INUI ,  Akira HIRANO ,  Wataru IMAJUKU ,  Shoukei KOBAYASHI ,  Takafumi TANAKA ,  Yutaka MIYAMOTO ,  Hidehiko TAKARA

IPC: H04B10/079 ,  H04B10/2581 ,  H04B10/54

Abstract: 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：US20180358773A1

公开(公告)日：2018-12-13

申请号：US15778541

申请日：2016-11-22

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takuya ODA ,  Tetsuro INUI ,  Akira HIRANO ,  Wataru IMAJUKU ,  Shoukei KOBAYASHI ,  Takafumi TANAKA ,  Yutaka MIYAMOTO ,  Hidehiko TAKARA

IPC: H01S3/067 ,  H01S3/30 ,  H01S3/16 ,  H04B10/2581

CPC classification number: H01S3/06737 ,  G02F1/35 ,  H01S3/067 ,  H01S3/10 ,  H01S3/1608 ,  H01S3/30 ,  H01S3/302 ,  H04B10/2581 ,  H04B10/291

Abstract: 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：US20180351639A1

公开(公告)日：2018-12-06

申请号：US15778011

申请日：2016-11-22

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takuya ODA ,  Tetsuro INUI ,  Akira HIRANO ,  Wataru IMAJUKU ,  Shoukei KOBAYASHI ,  Takafumi TANAKA ,  Yutaka MIYAMOTO ,  Hidehiko TAKARA

IPC: H04B10/077 ,  H04B10/25

Abstract: 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：US20180343067A1

公开(公告)日：2018-11-29

申请号：US15778972

申请日：2016-11-22

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takuya ODA ,  Tetsuro INUI ,  Akira HIRANO ,  Wataru IMAJUKU ,  Shoukei KOBAYASHI ,  Takafumi TANAKA ,  Yutaka MIYAMOTO ,  Hidehiko TAKARA

IPC: H04B10/80 ,  H04B10/2581

Abstract: A node included in an optical power supply system which includes three or more nodes and a multi-core fiber having a plurality of cores, the plurality of cores being used in at least a partial segment of the connection between the nodes includes: a power supply light dropping unit configured to drop a portion or all of a power supply light from one core of the plurality of cores of the multi-core fiber; a photoelectric conversion unit configured to convert the portion or all of the power supply light dropped by the power supply light dropping unit to an electrical signal; and a power supply target facility configured to operate with the electrical signal converted by the photoelectric conversion unit.