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1.发明公开公开(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.
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2.发明公开公开(公告)号：US20230291471A1
公开(公告)日：2023-09-14
申请号：US18011573
申请日：2020-06-23
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Yohei KATAYAMA , Kazumitsu SAKAMOTO , Kento YOSHIZAWA , Hiroyuki FUKUMOTO , Takuya OHARA , Takeshi KINOSHITA , Etsushi YAMAZAKI , Takayuki MIZUNO
IPC: H04B10/112 , H04B10/2557
CPC classification number: H04B10/112 , H04B10/2557
Abstract: A phase difference distribution estimation method includes: receiving an optical signal via a space and detecting a phase of the optical signal; calculating characteristic values related to characteristics of the atmosphere through which the optical signal propagates from the optical signal received in the receiving; estimating a phase difference distribution of an optical signal received after a certain period of time, on the basis of the characteristic values calculated in the calculating; and controlling a phase of an optical signal in the receiving on the basis of the phase difference distribution estimated in the estimating.
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公开(公告)号：US20170324472A1
公开(公告)日：2017-11-09
申请号：US15526835
申请日：2015-11-27
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kei KITAMURA , Takafumi HAMANO , Takashi KOTANIGAWA , Kaoru ARAI , Masahiro YOKOTA , Hideki MAEDA , Yoshiaki YAMADA , Takuya OHARA , Kengo SHINTAKU
IPC: H04B10/032 , H04J3/16
Abstract: A framer in a transmission device allocates plural optical channel time slots to a plurality of logical prioritized paths. It allocates received client signals to the allocated time slots, and transmits the client signals by a plurality of optical subcarriers that use a plurality of optical wavelengths corresponding to the plurality of time slots. The framer includes: a time slot allocation unit that, in a case where an optical wavelength corresponding to a time slot allocated to a logical path having a high transmission priority is not used, allocates at least one of the plurality of time slots to the logical path having the high transmission priority while the time slot corresponding to the unused optical wavelength is avoided, to change the time slot allocated to the logical path having the high transmission priority.
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公开(公告)号：US20150333838A1
公开(公告)日：2015-11-19
申请号：US14758941
申请日：2014-01-24
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kengo HORIKOSHI , Kohki SHIBAHARA , Etsushi YAMAZAKI , Mitsuteru YOSHIDA , Koichi ISHIHARA , Takayuki KOBAYASHI , Yoshiaki KISAKA , Takuya OHARA , Masahito TOMIZAWA , Tomoyoshi KATAOKA
CPC classification number: H04B10/6165 , H04L7/0041 , H04L7/0075 , H04L27/066 , H04L27/389
Abstract: An optical receiving device receives an optical signal that has been modulated by means of phase modulation or quadrature amplitude modulation, converts the received optical signal into an electrical signal using coherent detection, and performs phase compensation on the converted received signal, and includes: a carrier phase estimation unit that estimates carrier phase errors in a received symbol string obtained from the received signal; a gain adjustment unit that performs gain adjustment on symbols input into the carrier phase adjustment unit; a phase cycle slip reduction unit that, by performing statistical processing on an output from the carrier phase estimation unit, detects general noise that causes a phase cycle slip, and reduces the phase cycle slip; and a phase compensation circuit that compensates carrier phase errors contained in the received signal using an output from the carrier phase estimation unit.
Abstract translation: 光接收装置接收通过相位调制或正交幅度调制进行了调制的光信号，使用相干检测将接收的光信号转换为电信号，并对转换的接收信号进行相位补偿，并包括：载波 估计从接收信号获得的接收符号串中的载波相位误差的相位估计单元; 增益调整单元，对输入到所述载波相位调整单元的符号进行增益调整; 通过对来自载波相位估计单元的输出进行统计处理，检测导致相位滑动的一般噪声并减少相位滑动的相位滑移减小单元; 以及相位补偿电路，其使用来自载波相位估计单元的输出来补偿接收信号中包含的载波相位误差。
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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.
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Patent Agency Ranking
公开(公告)号：US20240187763A1
公开(公告)日：2024-06-06
申请号：US18286415
申请日：2021-04-21
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kengo SHINTAKU , Takuya OHARA , Fumikazu INUZUKA , Takuya ODA , Katsuaki HIGASHIMORI
CPC classification number: H04Q11/0062 , H04B10/27 , H04Q2011/0064 , H04Q2011/0086
Abstract: A transmission device, which is provided between user devices and transmits a client signal transmitted by the user devices through an optical transmission network, the transmission device comprising: a setting unit of setting a path having a band for accommodating the client signal obtained from a monitoring result of a control signal transmitted and received at a time of negotiation between the user devices; and a transfer unit of transferring the client signal using the path set by the setting unit.
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公开(公告)号：US20230344753A1
公开(公告)日：2023-10-26
申请号：US18028042
申请日：2020-09-25
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Takuya ODA , Takuya OHARA , Fumikazu INUZUKA , Takafumi TANAKA , Masayuki SHIMODA
Abstract: Distribution devices are each connected to a single or a plurality of line switching networks and a single or a plurality of packet switching networks, selects either the line switching network or the packet switching network as the distribution destination on the basis of distribution policy information in a case where data to which the service providing device or the calculation device is set as a transmission destination, and transmits the received data to the selected switching network is received, and the distribution device captures the received data on the basis of the aggregation policy information and transmit the data to the service providing device or the calculation device corresponding to the transmission destination of the captured data in a case where data transmitted by the other distribution device is received from the line switching network or the packet switching network.
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公开(公告)号：US20230232307A1
公开(公告)日：2023-07-20
申请号：US18029722
申请日：2020-10-22
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Takafumi Tanaka , Takuya OHARA , Fumikazu INUZUKA , Takuya ODA , Masayuki SHIMODA
IPC: H04W40/04 , H04B10/114 , H04W72/0446
CPC classification number: H04W40/04 , H04B10/114 , H04W72/0446
Abstract: An optical path design device includes: a search unit configured to search for one or more route possibilities from a start point to an end point in an optical network including one or more transmission paths as links and a plurality of node devices as nodes on the basis of topology information of the optical network, information on the start point, and information on the end point; a time derivation unit configured to derive available time which is time at which a frequency band including one or more frequency slots becomes available for communication for each of the transmission paths or the node devices included in the route; and a design unit configured to select the route from the one or more route possibilities that have been searched for on the basis of the available time derived for each of the transmission paths or the node devices and select a frequency band of an optical signal to be transmitted through an optical path in the selected route.
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公开(公告)号：US20220006577A1
公开(公告)日：2022-01-06
申请号：US17293743
申请日：2019-11-18
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Kei Kitamura , Fumikazu INUZUKA , Akira Hirano , Masahito TOMIZAWA , Takuya OHARA
Abstract: A transmission apparatus includes redundant first communication devices configured to communicate with a communication apparatus provided in a first network, and redundant second communication devices configured to communicate with a communication apparatus provided in a second network. The second communication devices include respective first ends that are ends of redundant communication paths of the first communication devices, and the first communication devices include respective second ends that are ends of redundant communication paths of the second communication devices.
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公开(公告)号：US20170111116A1
公开(公告)日：2017-04-20
申请号：US15126557
申请日：2014-11-19
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Takuya OHARA , Kei KITAMURA , Yoshiaki KISAKA , Shigeki AISAWA , Masahiro SUZUKI , Etsushi YAMAZAKI , Tomoyoshi KATAOKA , Masahito TOMIZAWA , Yoshiaki YAMADA , Mitsuhiro TESHIMA , Akira HIRANO
IPC: H04B10/40 , H04B10/60 , H04B10/27 , H04B10/516
CPC classification number: H04B10/40 , H04B10/27 , H04B10/5161 , H04B10/60 , H04J3/00 , H04J3/1652 , H04J14/00
Abstract: A transport apparatus includes: a client signal transceiving unit which transceives a client signal; a line signal transceiving unit which performs electric-optic conversion on a line signal to be transmitted, transmits an optical line signal, performs optic-electric conversion on a received line signal, and outputs an electrical line signal; and a plurality of signal processing units which perform signal processing on the client signal to generate the line signal to be transmitted and perform signal processing on the electrical line signal to generate the client signal. Each of the plurality of signal processing units includes a signal transceiving unit which performs transfer of a branched signal obtained by branching a signal to be transmitted and a merged signal obtained by merging received signals with another signal processing unit, and the signal transceiving unit of each of the plurality of signal processing units and the signal transceiving unit of the other signal processing unit are coupled via an inter-chip wiring.
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