公开(公告)号：US20240031045A1

公开(公告)日：2024-01-25

申请号：US18028389

申请日：2020-09-29

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takuya OHARA ,  Takuya ODA ,  Fumikazu INUZUKA ,  Takafumi TANAKA ,  Masayuki SHIMODA

IPC: H04B17/364 ,  H04B17/10

CPC classification number: H04B17/364 ,  H04B17/104

Abstract: One aspect of the present invention is an information processing system including a computing machine installed in a computing machine base, a first transmission/reception device connected to the computing machine, a second transmission/reception device installed in a user base used by a user, a device connected to the second transmission/reception device, and a delay control device configured to measure a delay amount generated between the first transmission/reception device and the second transmission/reception device and control the measured delay amount.

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：US20240155035A1

公开(公告)日：2024-05-09

申请号：US18413370

申请日：2024-01-16

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Takuya OHARA ,  Takuya ODA ,  Fumikazu INUZUKA ,  Takafumi TANAKA ,  Masayuki SHIMODA

IPC: H04L67/141 ,  H04L41/084

CPC classification number: H04L67/141 ,  H04L41/0846

Abstract: One aspect of the present invention is an information processing system that includes a computing machine installed in a computing machine base, and a first transmitting/receiving apparatus connected to the computing machine, a second transmitting/receiving apparatus installed in a user base that is used by a user, and a device connected to the second transmitting/receiving apparatus, and a control apparatus configured to control connection between the first transmitting/receiving apparatus and the second transmitting/receiving apparatus. In the information processing system, the control apparatus is configured to change the connection between the first transmitting/receiving apparatus and the second transmitting/receiving apparatus, and copy the state of the pre-change computing machine from the pre-change computing machine into the post-change computing machine.

公开(公告)号：US20220345398A1

公开(公告)日：2022-10-27

申请号：US17763693

申请日：2019-09-30

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Kengo SHINTAKU ,  Shokei KOBAYASHI ,  Fumikazu INUZUKA ,  Kei KITAMURA ,  Takuya ODA ,  Takafumi TANAKA

IPC: H04L45/28 ,  H04L45/12

Abstract: A transfer device includes a detection unit configured to detect a sign of a failure in a link between transfer devices, and a management unit configured to update a routing table to lower a priority of a path via the link when the sign of the failure is detected by the detection unit.

公开(公告)号：US20250016089A1

公开(公告)日：2025-01-09

申请号：US18034288

申请日：2020-11-16

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takafumi TANAKA ,  Takuya OHARA ,  Fumikazu INUZUKA ,  Takuya ODA ,  Masayuki SHIMODA

IPC: H04L45/24

Abstract: An aspect of the present invention is a communication path search device that constructs a multicast path of a plurality of nodes connected to a network, the communication path search device including a network device information management unit configured to manage a device specification including constraint information on the number of branches of each of the nodes on the network, a network topology management unit configured to manage link information between the nodes on the network, and a multicast tree calculation unit configured to construct a Steiner tree of a path connecting a start node and an end node based on a new request, an existing request, the constraint information on the number of branches of each of the nodes, constraint information on a maximum number of branches of each of the nodes, and the link information, the new request and the existing request each including start node and end node information.

公开(公告)号：US20230412299A1

公开(公告)日：2023-12-21

申请号：US18029726

申请日：2020-10-22

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Takafumi Tanaka ,  Takuya OHARA ,  Fumikazu INUZUKA ,  Takuya ODA ,  Masayuki SHIMODA

IPC: H04J14/02 ,  H04B10/27

CPC classification number: H04J14/0267 ,  H04B10/27

Abstract: An optical path design device includes a scheduling unit configured to generate, according to demand information, including information on a frequency bandwidth required for communication between a first node device at a start point of an optical path and a second node device at an end point of an optical path, and including information on a future time zone in which the communication will be executed, allocation content including information on a route connecting the first node device and the second node device and information on a center frequency of the frequency allocated to the communication corresponding to the demand information and determine the start time and the end time of the allocation of the allocation content, and a queue for adjusting a timing of allocation of the allocation content in the future time zone based on the start time and the end time of the allocation in a case where the allocation content cannot be allocated to the communication corresponding to the demand information with the current time as the start time of the allocation.

公开(公告)号：US20230403220A1

公开(公告)日：2023-12-14

申请号：US18027597

申请日：2020-09-29

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takuya ODA ,  Takuya OHARA ,  Fumikazu INUZUKA ,  Takafumi TANAKA ,  Masayuki SHIMODA

IPC: H04L43/0852

CPC classification number: H04L43/0852

Abstract: One aspect of the present invention provides an information processing system in which at least one of a connection between an input/output device and a computing machine or a connection between the computing machine and a central computing machine is made via a network, and a plurality of users uses the same content by using the input/output device via the network, the information processing system including a delay measurement device configured to measure an amount of transmission delay generated between the input/output device and the central computing machine for each of the users, and a delay adjustment device configured to adjust a difference in the amount of transmission delay between the users to be kept within a predetermined value on the basis of the measured amount of transmission delay.

公开(公告)号：US20220006722A1

公开(公告)日：2022-01-06

申请号：US17292577

申请日：2019-11-07

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Kei KITAMURA ,  Fumikazu INUZUKA ,  Akira HIRANO ,  Masahito TOMIZAWA ,  Takuya OHARA

IPC: H04L12/727 ,  H04L12/707 ,  H04L12/703 ,  H04L12/835

Abstract: A transmission apparatus performs communication with a transmission side transmission apparatus via a transmission path of an active system and a transmission path of a standby system. The transmission apparatus includes: a memory configured to have a capacity that is as large as delay caused due to a maximum path difference between the transmission path of the active system and the transmission path of the standby system is allowable; and a memory connection control unit configured to switch connection of the memory and cause a signal of the transmission path of the active system or the transmission path of the standby system to be accumulated in the memory.

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.

公开(公告)号：US20240275671A1

公开(公告)日：2024-08-15

申请号：US18565892

申请日：2021-06-28

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takuya ODA ,  Takuya OHARA ,  Fumikazu INUZUKA ,  Katsuaki HIGASHIMORI ,  Kengo SHINTAKU

IPC: H04L41/0816 ,  H04B10/27 ,  H04L41/40

CPC classification number: H04L41/0816 ,  H04B10/27 ,  H04L41/40

Abstract: A communication system is a communication system that includes: a plurality of transmission devices; a setting server that receives an instruction to change data related to setting of a data network; and a control server that performs a control process related to the plurality of transmission devices and the data network on a basis of the data. In the communication system, a setting processing unit is provided to perform a process for constructing a customer control network between a first transmission device and the setting server by using a second transmission device as a relay device, when the first transmission device and the second transmission device are connected by an optical transmission line. The first transmission device includes: a connection processing unit that performs a process for constructing a control network between the first transmission device and the control server by using the second transmission device as a relay device, when the first transmission device and the second transmission device are connected by the optical transmission line; and a device control unit that performs a process for constructing the data network for the first transmission device by using the second transmission device as a relay device, when the first transmission device and the second transmission device are connected by the optical transmission line.