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    OPTICAL COMMUNICATION APPARATUS, OPTICAL COMMUNICATION SYSTEM AND TRANSMISSION METHOD
    1.
    发明申请
    OPTICAL COMMUNICATION APPARATUS, OPTICAL COMMUNICATION SYSTEM AND TRANSMISSION METHOD 有权

    公开(公告)号：US20240422457A1

    公开(公告)日：2024-12-19

    申请号：US18699955

    申请日：2021-10-12

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Naotaka SHIBATA ,  Shin KANEKO

    IPC: H04Q11/00 ,  H04B10/27

    Abstract: An optical communication device includes: a first optical switch that is connected to a plurality of optical transmission lines and outputs an optical signal input from any of the optical transmission lines to another optical transmission line; a second optical switch that is connected to a plurality of optical transmission lines and outputs an optical signal input from any of the optical transmission lines to another optical transmission line; and a transfer unit configured to transfer an optical signal transmitted from a first device connected to the first optical switch to a specific second device connected to the second optical switch.

    SWITCH, NETWORK CONTROLLER, COMMUNICATION CONTROL METHOD, AND COMMUNICATION CONTROL PROGRAM
    2.
    发明公开
    SWITCH, NETWORK CONTROLLER, COMMUNICATION CONTROL METHOD, AND COMMUNICATION CONTROL PROGRAM 审中-公开

    公开(公告)号：US20240283817A1

    公开(公告)日：2024-08-22

    申请号：US18563932

    申请日：2021-05-28

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Rintaro HARADA ,  Naotaka SHIBATA ,  Shin KANEKO

    IPC: H04L9/40

    CPC classification number: H04L63/1458

    Abstract: A switch in a communication network comprises a controller for controlling a communication flow in the communication network. A suspected flow is a communication flow suspected of being related to a DDoS (Distributed Denial of Service) attack. A normal flow is a communication flow other than the suspected flow. The controller is configured to execute provisional handling when receiving a provisional handling instruction indicating identification information of the suspected flow from a network controller. The provisional handling includes processing of setting a priority of the suspected flow to a designated priority, and processing of setting a priority of the normal flow higher than the designated priority.

    OPTICAL COMMUNICATION SYSTEM, OPTICAL TRANSMITTING AND RECEIVING APPARATUS, AND OPTICAL COMMUNICATION METHOD
    3.
    发明公开
    OPTICAL COMMUNICATION SYSTEM, OPTICAL TRANSMITTING AND RECEIVING APPARATUS, AND OPTICAL COMMUNICATION METHOD 审中-公开

    公开(公告)号：US20240187099A1

    公开(公告)日：2024-06-06

    申请号：US18285926

    申请日：2021-04-14

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Shin KANEKO ,  Junichi KANI ,  Kazutaka HARA ,  Takuya KANAI

    IPC: H04B10/27 ,  H04B10/58

    CPC classification number: H04B10/27 ,  H04B10/58

    Abstract: An optical switch receives an input of an optical signal which has been transmitted by a first optical communication device from a first port, and outputs the optical signal from a second port connected to a first optical transmission line included in an optical route in which an optical path between the first optical communication device and a second optical communication device is set. An optical branching unit branches a part of the optical signal which has been transmitted through the first optical transmission line, and outputs the branched optical signal to a second optical transmission line. An optical transmitting and receiving apparatus includes a reception unit, a transmission unit, and a light cutoff unit. The reception unit receives an input of the optical signal which has been branched by the optical branching unit from the second optical transmission line, and acquires a signal addressed to a destination different from the second optical communication device from the input optical signal. The transmission unit generates an optical signal using light emitted by a light source. The light cutoff unit prevents the light from the light source from being input to the second optical transmission line.

    OPTICAL COMMUNICATION DEVICE, CONTROL METHOD AND OPTICAL COMMUNICATION SYSTEM
    4.
    发明公开
    OPTICAL COMMUNICATION DEVICE, CONTROL METHOD AND OPTICAL COMMUNICATION SYSTEM 审中-公开

    公开(公告)号：US20240056189A1

    公开(公告)日：2024-02-15

    申请号：US18267991

    申请日：2020-12-22

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Yasunari TANAKA ,  Shin KANEKO ,  Yumiko SENOO ,  Kazuaki HONDA

    IPC: H04B10/27

    CPC classification number: H04B10/27

    Abstract: According to an aspect of the present invention, an optical communication device includes: a detection unit that is connected to a user device and detects light which is output from the connected user device; a connection unit that connects the user device and a control transceiver in a case where light is detected by the detection unit; an acquisition unit that acquires, via the control transceiver, communication destination information indicating a communication destination to which the user device requests connection; an assignment unit that assigns a wavelength to the user device according to the communication destination information acquired by the acquisition unit; and a notification unit that notifies the user device of wavelength information indicating the wavelength assigned by the assignment unit via the control transceiver.

    OPTICAL COMMUNICATION SYSTEM AND MASTER STATION
    6.
    发明公开
    OPTICAL COMMUNICATION SYSTEM AND MASTER STATION 审中-公开

    公开(公告)号：US20230198613A1

    公开(公告)日：2023-06-22

    申请号：US17916789

    申请日：2020-04-09

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Rintaro HARADA ,  Hirotaka UJIKAWA ,  Shin KANEKO ,  Jun TERADA

    IPC: H04B10/032

    CPC classification number: H04B10/032

    Abstract: The present invention enables shortening the time required for resuming communication in a protection method that uses a backup path in an optical communication system that includes a master station device and multiple slave station devices. The slave station devices are connected to a loop path in parallel. The communication paths between the master station device and the slave station devices include a normal path and a backup path. The master station device executes communication control processing with respect to the slave station devices based on the RTTs. A first slave station device is a slave station device that cannot perform communication via the normal path. If the first slave station device is detected, the master station device calculates a first backup path for the first slave station device based on a first RTT between the master station device and the loop path, a loop RTT required for one full lap on the loop path, and the first normal path RTT for the first slave station device. The master station device then resumes communication control processing for the first slave station device based on the calculated first backup path RTT.

    PROTECTION METHOD AND OPTICAL COMMUNICATION SYSTEM
    8.
    发明申请
    PROTECTION METHOD AND OPTICAL COMMUNICATION SYSTEM 有权
    保护方法和光通信系统

    公开(公告)号：US20160248539A1

    公开(公告)日：2016-08-25

    申请号：US15027398

    申请日：2014-10-22

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Shin KANEKO ,  Tomoaki YOSHIDA ,  Shunji KIMURA

    IPC: H04J14/02 ,  H04Q11/00

    CPC classification number: H04J14/0297 ,  H04J14/0282 ,  H04J14/0295 ,  H04Q11/0066 ,  H04Q2011/0016 ,  H04Q2011/0043 ,  H04Q2213/1301 ,  H04Q2213/13295

    Abstract: A protection method wherein an ONU switches a reception wavelength to a backup wavelength so as to be logically connected to a backup OSU designated in advance for each ONU when the ONU detects a failure in an OSU to which the ONU is originally assigned, while the ONU keeps on holding its own connection information with the OLT. In the OLT, a backup OSU for the ONU which is originally assigned to the failed OSU is notified of the information on the ONU when the OLT detects a failure in an OSU. In this way, the ONUs which are originally assigned to the failed OSU resumes communication in a short period.

    Abstract translation: 一种保护方法，其中当ONU检测到最初分配了ONU的OSU中的故障时，ONU将接收波长切换到备用波长，以便逻辑地连接到每个ONU预先指定的备用OSU，而ONU 继续保持与OLT的连接信息。 在OLT中，当OLT检测到OSU中的故障时，在原始分配给故障OSU的ONU的备用OSU被通知在ONU上的信息。 以这种方式，最初分配给故障OSU的ONU在短时间内恢复通信。

    OPTICAL ACCESS SYSTEM AND CONTROL SIGNAL SUPERIMPOSITION METHOD
    9.
    发明申请
    OPTICAL ACCESS SYSTEM AND CONTROL SIGNAL SUPERIMPOSITION METHOD 有权

    公开(公告)号：US20240381012A1

    公开(公告)日：2024-11-14

    申请号：US18286401

    申请日：2021-04-19

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Kazutaka HARA ,  Junichi KANI ,  Shin KANEKO ,  Takuya KANAI ,  Yumiko SENOO

    IPC: H04Q11/00

    Abstract: Provided is an optical access system that performs communication using an optical signal on which a management control signal used for management and control is superimposed, the optical access system including: a subscriber device on a transmitting side that generates an optical signal by superimposing the management control signal on a main signal and transmits the generated optical signal; a management control unit that outputs a management control signal which is superimposed on the optical signal transmitted by the subscriber device on the transmitting side and which has a frequency band different from a frequency of the management control signal superimposed on the optical signal; and a control signal superimposing unit that superimposes the management control signal output from the management control unit on the optical signal.

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