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.