公开(公告)号：US20210013963A1

公开(公告)日：2021-01-14

申请号：US16968741

申请日：2019-02-13

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Seiki KUWABARA ,  Wataru KAWAKAMI ,  Hideki NISHIZAWA ,  Seiji OKAMOTO ,  Akira HIRANO ,  Shokei KOBAYASHI ,  Tetsuro INUI ,  Takuya ODA ,  Fumikazu INUZUKA ,  Takafumi TANAKA

IPC: H04B10/079

Abstract: A state estimating device includes a pre-processing unit and an estimating unit. The pre-processing unit acquires data representing at one or more of a phase of a signal transmitted from a transmission unit of a transmission device and received at a reception unit of another transmission device via a transmission path, a reception strength, a reception quality, a voltage after conversion into an electric signal, and a signal processing parameter used in reception processing, and processes the acquired data into feature data to be used for state estimation. The estimating unit estimates a state of the transmission path, an abnormal state of the transmission unit, or an abnormal state of the reception unit, on the basis of the feature data.

公开(公告)号：US20210126707A1

公开(公告)日：2021-04-29

申请号：US17252833

申请日：2019-06-05

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takafumi TANAKA ,  Shokei KOBAYASHI ,  Seiki KUWABARA ,  Yoshiaki YAMADA

IPC: H04B10/079 ,  H04B10/29 ,  H04J3/16

Abstract: A communication system transmits relay data through a communication path including a plurality of sections in which different communication schemes are used. A relay communication device is provided between a first section and a second section which are adjacent sections. The relay communication device includes a receiving unit receiving the relay data from the first section through a frame of a first communication scheme, and a relaying unit configuring, in a frame of a second communication scheme used to transmit the relay data to a relay destination, signal quality information representing signal quality calculated for a physical link in each of the sections through which the relay data is transmitted before arriving at the relay communication device, and outputting the frame of the second communication scheme to the second section.

公开(公告)号：US20230076671A1

公开(公告)日：2023-03-09

申请号：US17797743

申请日：2020-02-17

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takafumi TANAKA ,  Hideki NISHIZAWA ,  Tetsuro INUI ,  Seiki KUWABARA ,  Shuto YAMAMOTO ,  Seiji OKAMOTO

IPC: H04B10/27 ,  H04B10/07

Abstract: A virtual environment optical communication network is generated by setting configuration parameters of physical packages of a real environment optical communication network in package emulators that a computer program has virtually constructed to implement the physical packages, the real environment optical communication network being constructed by a plurality of node devices in which the physical packages are mounted, pieces of configuration data are generated based on pieces of resource data indicating resources required for optical paths detected based on acquired configuration parameters and a requested transmission mode, optical paths are set in the virtual environment optical communication network based on the generated pieces of configuration data, and optical paths are set in the real environment optical communication network based on the pieces of configuration data that have been used to set the optical paths.

公开(公告)号：US20210028857A1

公开(公告)日：2021-01-28

申请号：US16979662

申请日：2019-03-01

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Fumikazu INUZUKA ,  Shokei KOBAYASHI ,  Akira HIRANO ,  Wataru KAWAKAMI ,  Tetsuro INUI ,  Seiki KUWABARA ,  Kei KITAMURA ,  Takafumi TANAKA ,  Takuya ODA ,  Hideki NISHIZAWA ,  Seiji OKAMOTO

IPC: H04B10/079 ,  H04B10/077 ,  H04B10/272 ,  H04B10/25 ,  H04B10/516

Abstract: There is provided an optical transmission system in which a plurality of optical transmission and reception apparatuses perform 1-to-N transmission and reception of optical signals (N is an integer equal to or greater than 1), the optical transmission system being configured to select a communication condition that includes at least a modulation scheme or a baud rate and is a communication condition when each of the optical transmission and reception apparatuses performs transmission and reception in accordance with a transmission line condition that is between any one first optical transmission and reception apparatus and each of second optical transmission and reception apparatuses, which are N grounds, other than the first optical transmission and reception apparatus.