公开(公告)号：US20240413907A1

公开(公告)日：2024-12-12

申请号：US18699923

申请日：2022-08-01

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Naotaka SHIBATA ,  Shin KANEKO ,  Masahisa KAWASHIMA

IPC: H04B10/27 ,  H04B10/294

Abstract: An optical communication device includes: a plurality of first distribution units that is connected to a plurality of optical transmission lines and outputs an optical signal input from any of first devices to any of the optical transmission lines; a plurality of second distribution units that is connected to a plurality of optical transmission lines and outputs an optical signal input from any of the optical transmission lines to any of second devices; and a multicast transfer unit configured to perform multicast transfer of the optical signal transmitted from the first device connected to any of the plurality of first distribution units to any of the plurality of second distribution units connected to the one or more second devices.

公开(公告)号：US20230291492A1

公开(公告)日：2023-09-14

申请号：US18011580

申请日：2020-06-29

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Naotaka SHIBATA ,  Hiroko Nomura ,  Keita Takahashi ,  Tomoya HATANO

IPC: H04J14/02 ,  H04L45/00 ,  H04L49/25

CPC classification number: H04J14/0267 ,  H04L45/62 ,  H04L49/25

Abstract: Provided is a multiplex transmission system capable of preventing occurrence of a mistake on connection of a client device to a multiplex transmission device. The multiplex transmission system includes: an extraction means configured to extract identification information from a signal inputted to a client port of each of a first multiplex transmission device 100 and a second multiplex transmission device 200; and a switch control unit 340 configured to control a switch unit 330 to connect the client port of the first multiplex transmission device 100 with the client port of the second multiplex transmission device 200 on the basis of a result of collation between identification information extracted from a signal inputted to the client port of the first multiplex transmission device 100 and identification information extracted from a signal inputted to the client port of the second multiplex transmission device 200.

公开(公告)号：US20230084976A1

公开(公告)日：2023-03-16

申请号：US17802126

申请日：2020-03-06

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tomoya HATANO ,  Keita TAKAHASHI ,  Naotaka SHIBATA ,  Hiroko NOMURA

IPC: H04B10/275 ,  H04B10/03

Abstract: A communication system of a passive optical communication network includes an optical line terminal (OLT) system including a first OLT, a second OLT, and an OLT control device that controls the first OLT and the second OLT, a plurality of splitters that connects between the first OLT and the second OLT with an optical communication path, and an optical network unit (ONU) that is connected to each of the plurality of splitters with an optical communication path.

公开(公告)号：US20220201536A1

公开(公告)日：2022-06-23

申请号：US17603464

申请日：2020-04-02

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tatsuya FUKUI ,  Naotaka SHIBATA ,  Keita TAKAHASHI ,  Hideaki KIMURA ,  Noriyuki OTA ,  Hirofumi YAMAMOTO ,  Jun TERADA

IPC: H04W28/02

Abstract: An object is to provide a communication system, a communication apparatus, and a terminal apparatus capable of integrating communication paths of both of mobile access and fixed access while addition of a new function to a mobile network is reduced.
In a communication system 100 according to the present invention, a communication path of one mobile bearer between a base station master station apparatus 300 and a user gateway 600 includes a split bearer configuration including a mobile access communication path being connected from the base station master station apparatus 300 to the user gateway 600 via a mobile access slave station apparatus 400 and a non-mobile access communication path being connected from the base station master station apparatus 300 to the user gateway 600 via a non-mobile access slave station apparatus 500.

公开(公告)号：US20220116825A1

公开(公告)日：2022-04-14

申请号：US17298336

申请日：2019-11-28

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Naotaka SHIBATA ,  Hiroyuki UZAWA ,  Yoichi FUKADA ,  Jun TERADA

IPC: H04W28/08 ,  H04W40/02 ,  H04W72/12

Abstract: Provided is a path control method of controlling a path of communication in a network including a high priority device dealing with high priority traffic, a high priority control device communicating with the high priority device through a plurality of signal transfer devices transferring signals by periodically repeating a high priority signal transmissible period in which high priority traffic is transmissible and a low priority signal transmissible period in which low priority traffic is transmissible, a low priority device dealing with the low priority traffic, and a low priority control device communicating with the low priority device through the plurality of signal transfer devices, the path control method including calculating a low priority signal transmissible period in each of paths between the low priority device and the low priority control device, and performing setting for switching the path between the low priority device and the low priority control device so that the low priority traffic is transmitted in any one of the calculated low priority signal transmissible periods.

公开(公告)号：US20150373640A1

公开(公告)日：2015-12-24

申请号：US14654783

申请日：2013-12-17

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Noriko IIYAMA ,  Jun-ichi KANI ,  Naotaka SHIBATA

IPC: H04W52/02 ,  H04B10/2575 ,  H04W72/12 ,  H04Q11/00

CPC classification number: H04W52/0203 ,  H04B10/25753 ,  H04B10/272 ,  H04Q11/0067 ,  H04Q2011/0064 ,  H04Q2011/0086 ,  H04W72/1289 ,  H04W88/085 ,  Y02D70/1262 ,  Y02D70/146 ,  Y02D70/24 ,  Y02D70/46

Abstract: A method of operating an optical-wireless access system, wherein an ONU obtains information on dynamic scheduling control of the optical-wireless access system, information on discontinuous reception control of the optical-wireless access system, or both of them, and such information is used in the ONU or transferred to an OLT and used as parameters of scheduling in the PON and sleep control.

Abstract translation: 一种操作光无线接入系统的方法，其中ONU获取关于光无线接入系统的动态调度控制的信息，关于光无线接入系统的不连续接收控制的信息，或者它们两者，这些信息是 在ONU中使用或传输到OLT并用作PON中的调度参数和睡眠控制。

公开(公告)号：US20240230832A1

公开(公告)日：2024-07-11

申请号：US18562439

申请日：2021-05-20

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Naotaka SHIBATA ,  Takeshi Imai ,  Ryo IGARASHI ,  Kazutaka HARA

IPC: G01S5/16 ,  H04W4/021 ,  H04W64/00

CPC classification number: G01S5/16 ,  H04W4/021 ,  H04W64/003

Abstract: One aspect of the present invention is a decision device including: a position information acquisition unit that acquires position information indicating a position where the lighting device is installable and an irradiation target region that is irradiated with light in a case where the lighting device is installed at the position; an adjacency information acquisition unit that acquires adjacency information indicating an adjacency relationship of the irradiation target region on the basis of the position information acquired by the position information acquisition unit; and a decision unit that decides the installation position of the lighting device on the basis of the adjacency information acquired by the adjacency information acquisition unit such that non-irradiation target regions are not adjacent to each other, the non-irradiation target regions being not irradiated with light whose output mode changes due to non-installation of the lighting devices.

公开(公告)号：US20240200950A1

公开(公告)日：2024-06-20

申请号：US18287979

申请日：2021-05-20

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Kazutaka HARA ,  Ryo IGARASHI ,  Junichi KANI ,  Naotaka SHIBATA ,  Takeshi IMAI

IPC: G01C21/20 ,  H04B10/116

CPC classification number: G01C21/206 ,  H04B10/116

Abstract: An aspect of the present invention is a moving body that moves along a rail, the moving body including: a light emission unit; a movement control unit that controls the moving body so as to move on the rail at a predetermined speed; a measurement unit that measures a movement time of moving from a predetermined position on the rail; and a transmission unit that transmits a signal indicating position information corresponding to the movement time measured by the measurement unit by using the light emission unit.

公开(公告)号：US20240187094A1

公开(公告)日：2024-06-06

申请号：US18285496

申请日：2021-04-05

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Naotaka SHIBATA ,  Takeshi IMAI ,  Rintaro HARADA ,  Shin KANEKO

IPC: H04B10/112 ,  H04B10/516 ,  H04L1/00

CPC classification number: H04B10/112 ,  H04B10/5161 ,  H04L1/0061

Abstract: A beam transmission device transmits a directional beam toward a beam reception device in a wireless communication system. The main signal generation unit generates a main signal. A control signal generation unit periodically generates a control signal related to maintaining communication with the beam reception device. A signal multiplexing unit multiplexes the main signal and the control signal. A divergence angle adjustment unit sets a target divergence angle to a first divergence angle in a period in which the control signal is not included in the multiplexed signal, and sets the target divergence angle to a second divergence angle larger than the first divergence angle in a period in which the control signal is included in the multiplexed signal. A beam control unit changes a divergence angle of the beam modulated by the multiplexed signal to the target divergence angle.

公开(公告)号：US20230308179A1

公开(公告)日：2023-09-28

申请号：US18022196

申请日：2020-08-25

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Naotaka SHIBATA ,  Rintaro HARADA ,  Shin KANEKO

IPC: H04B10/11 ,  H04B10/294

CPC classification number: H04B10/11 ,  H04B10/294

Abstract: A spatial optical communication system in which a plurality of transmitters and a plurality of receivers opposite to each of the plurality of transmitters perform an optical communication in parallel, in which the plurality of transmitters transmit optical signals of same or adjacent wavelengths to the receivers of each opposite location, and has an interference blocking unit which is disposed between the transmitter and the receiver and spatially blocks an optical signal that interferes with the receiver of a non-opposite location among optical signals transmitted from the transmitter to the receiver of an opposite location. As a result, it is possible to avoid interference with other optical communications with a reduced space and at low cost, without need to supply power.