公开(公告)号：US20230327757A1

公开(公告)日：2023-10-12

申请号：US18025374

申请日：2020-09-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Sei KOU ,  Tomoya HATANO ,  Hirotaka UJIKAWA ,  Yuka OKAMOTO

IPC: H04B10/079

CPC classification number: H04B10/079

Abstract: A plurality of optical sensors (3) are installed in an optical path control device (1) configured to control a plurality of optical paths (2) without using an electrical element. The plurality of optical sensors (3) detect optical signals each passing through at least one of the plurality of optical paths (2). A transmitter (4) simultaneously determines communication states of the plurality of optical paths (2) based on detection of the optical signals by the plurality of optical sensors (3), and transmits information on the determined communication states.

公开(公告)号：US20230247335A1

公开(公告)日：2023-08-03

申请号：US18024953

申请日：2020-09-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Sei KOU ,  Tomoya HATANO ,  Hirotaka UJIKAWA ,  Yuka OKAMOTO

IPC: H04Q11/00

CPC classification number: H04Q11/0067 ,  H04L45/28

Abstract: A plurality of optical sensors (3) are each installed in an optical path control device (1) that controls a corresponding one of the plurality of optical paths (2) without using an electrical element. Each of the plurality of optical sensors (3) detects an optical signal passing through the corresponding one of the plurality of optical paths (2). A transmitter (4) determines a communication state of the corresponding one of the plurality of optical paths (2) based on detection of the optical signal by the corresponding one of the plurality of optical sensors (3), and transmits information on the determined communication state. A power supplying optical signal generation unit (11) generates a power supplying optical signal. An optical signal synthesizing device (12) synthesizes the power supplying optical signal with the optical signal and transmits a signal obtained by the synthesis to the optical path control device (1). A storage battery (13) supplies electric power to the transmitter (1). A photoelectric conversion unit (14) converts the power supplying optical signal branched from the optical signal in the optical path control device (1) into an electrical output and supplies the electrical output to the storage battery (13).

公开(公告)号：US20240089712A1

公开(公告)日：2024-03-14

申请号：US18271373

申请日：2021-01-08

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Shinya TAMAKI ,  Ryota SHIINA ,  Tetsuya SUZUKI ,  Yasutaka KIMURA ,  Tomohiro TANIGUCHI ,  Sei KOU ,  Tomoya HATANO ,  Takashi YAMADA

IPC: H04W4/38

CPC classification number: H04W4/38

Abstract: An object is to provide a data collection device and the like capable of reducing a load on an IoT terminal in metadata transmission and power consumption associated with the metadata transmission.
In the present invention, a controller is provided on a data collection side that collects metadata, the metadata transmitted from an IoT terminal is grasped, and the IoT terminal is instructed to reduce the transmission frequency of metadata that does not need high real-time property according to a sensor, the type of the IoT terminal, or the like. The IoT terminal transmits the metadata only at a window time (transmission timing, data size, metadata type, or the like) permitted by the metadata controller. As a result, the IoT terminal transmits the metadata only at a limited timing, and thus can reduce a transmission load and power consumption.

公开(公告)号：US20240014897A1

公开(公告)日：2024-01-11

申请号：US18025370

申请日：2020-09-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Sei KOU ,  Tomoya HATANO ,  Hirotaka UJIKAWA ,  Yuka OKAMOTO

IPC: H04B10/077

CPC classification number: H04B10/0771

Abstract: An optical sensor (3) is installed in an optical path control device (1) that controls an optical path (2) without using an electrical element. The optical sensor (3) detects an optical signal passing through the optical path (2). A communication state determination unit (5) determines a communication state of the optical path (2) based on detection of the optical signal by the optical sensor (3). A position information reception management unit (10) receives and stores position information of the optical path control device (1). An information arrangement unit (6) collectively converts a determination result of the communication state determination unit (5) and the position information into information. A transmission unit (7) transmits the information.

公开(公告)号：US20230362520A1

公开(公告)日：2023-11-09

申请号：US18024857

申请日：2020-09-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hirotaka UJIKAWA ,  Tomoya HATANO ,  Yuka OKAMOTO ,  Sei KOU

IPC: H04B10/032 ,  H04Q11/00

CPC classification number: H04Q11/0067 ,  H04B10/032 ,  H04Q11/0005 ,  H04L41/0677 ,  H04Q2011/0092

Abstract: An optical communication system includes a looped path in which an active trunk fiber and a standby trunk fiber are connected in a loop. A plurality of optical combining/splitting units is provided on an active trunk fiber in series, and a plurality of slave devices is connected the plurality of optical combining/splitting units, respectively. A master device performs optical communication with each slave device. Each optical combining/splitting unit includes an optical sensor configured to detect an optical signal passing through an optical fiber and a transmitter. The transmitter determines whether or not there is an abnormality in optical communication on the basis of a detection state of the optical signal and transmits an abnormality notification including identification information of the optical combining/splitting unit to a monitoring apparatus in a case where there is an abnormality. The monitoring apparatus holds connection relationship information indicating a connection relationship between the plurality of optical combining/splitting units along the active trunk fiber. In a case where the monitoring apparatus receives the abnormality notification from at least one of the plurality of optical combining/splitting units, the monitoring apparatus specifies a failure position on a communication path on the basis of identification information of each optical combining/splitting unit that has transmitted the abnormality notification and the connection relationship information.

公开(公告)号：US20250021373A1

公开(公告)日：2025-01-16

申请号：US18712021

申请日：2021-11-25

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Sei KOU ,  Takashi YAMADA ,  Tomoya HATANO

IPC: G06F9/455

Abstract: A control device includes an activation unit configured to cause another virtual machine or another container to activate an application that is activated in a virtual machine or a container constructed in a server and periodically transmits control information to a control target device, a communication setting unit configured to perform, in a case where the application has been activated, setting for enabling communication between the activated application and the control target device, and a deriving unit configured to derive, as a timing at which the activation unit activates the application, a timing at which the setting is not performed between transmission of the control information from the application and reception of the control information by the control target device, wherein the activation unit causes the another virtual machine or the another container to activate the application at the derived timing.

公开(公告)号：US20240323704A1

公开(公告)日：2024-09-26

申请号：US18269370

申请日：2020-12-28

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Ryota SHIINA ,  Shinya TAMAKI ,  Tetsuya SUZUKI ,  Yasutaka KIMURA ,  Tomohiro TANIGUCHI ,  Sei KOU ,  Tomoya HATANO ,  Takashi YAMADA

IPC: H04W16/28 ,  H04W28/06 ,  H04W64/00

CPC classification number: H04W16/28 ,  H04W28/06 ,  H04W64/00

Abstract: An object of the present disclosure is to reduce traffic required for transmission of beacon information from a sensor apparatus to an access point and reduce power consumption without affecting position estimation processing in a high-order cloud or server.
In order to achieve the above object, an Internet of Things (IoT) communication system according to the present disclosure is the IoT communication system including one or a plurality of sensor apparatuses and an access point that performs wireless communication with the sensor apparatuses, in which the access point emits a plurality of beams to an arbitrary point, the sensor apparatus converts the beacon information acquired from the detected beams into compressed beacon information based on a beacon information correspondence table and transmits the compressed beacon information to the access point, and the access point restores the beacon information from the compressed beacon information received from the sensor apparatus based on the beacon information correspondence table.

公开(公告)号：US20230318704A1

公开(公告)日：2023-10-05

申请号：US18024906

申请日：2020-09-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hirotaka UJIKAWA ,  Tomoya HATANO ,  Yuka OKAMOTO ,  Sei KOU

IPC: H04B10/079 ,  H04B10/278

CPC classification number: H04B10/0791 ,  H04B10/278

Abstract: An optical communication system includes a plurality of optical combining/splitting units provided on a trunk fiber in series, a plurality of slave devices connected to the plurality of optical combining/splitting units, respectively, a master device connected to the trunk fiber and configured to perform optical communication with each slave device, and a monitoring apparatus. Each optical combining/splitting unit includes an optical sensor configured to detect an optical signal passing through an optical fiber and a transmitter. The transmitter determines whether or not there is an abnormality in optical communication on the basis of a detection state of the optical signal and transmits an abnormality notification including identification information of the optical combining/splitting unit to the monitoring apparatus in a case where there is an abnormality in optical communication. The monitoring apparatus holds connection relationship information indicating a connection relationship between the plurality of optical combining/splitting units along the trunk fiber. In a case where the monitoring apparatus receives the abnormality notification from at least one of the plurality of optical combining/splitting units, the monitoring apparatus specifies a failure position on the trunk fiber on the basis of identification information of each optical combining/splitting unit that has transmitted the abnormality notification and the connection relationship information.

公开(公告)号：US20240053430A1

公开(公告)日：2024-02-15

申请号：US18271520

申请日：2021-01-22

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Shinya TAMAKI ,  Ryota SHIINA ,  Tetsuya SUZUKI ,  Yasutaka KIMURA ,  Tomohiro TANIGUCHI ,  Sei KOU ,  Tomoya HATANO ,  Takashi YAMADA

IPC: G01S5/02 ,  H04W64/00 ,  G01S5/00

CPC classification number: G01S5/0289 ,  H04W64/00 ,  G01S5/0036

Abstract: An object of the present invention is to provide a position estimation system capable of grasping position information of a plurality of wireless devices without using an external device such as a fixed beacon or a GPS, a position estimation method, a wireless device, and an analysis device. A position estimation system according to the present invention includes a plurality of wireless devices 11 and an analysis device 12, wherein the wireless devices 11 are each configured to: send beacon signals; transfer the beacon signals between the wireless devices 11 in a range that the beacon signals reach; update flags indicating transfer histories of the beacon signals at the time of transfer; and discard beacon signals sent by own wireless devices upon reception thereof. Any one of the wireless devices 11 is configured to collect the beacon signals, and the analysis device 12 analyzes the flags of the respective beacon signals collected by the wireless device 11-0, to estimate positions of the plurality of wireless devices 11.

公开(公告)号：US20230327756A1

公开(公告)日：2023-10-12

申请号：US18024926

申请日：2020-09-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tomoya HATANO ,  Hirotaka UJIKAWA ,  Sei KOU ,  Yuka OKAMOTO

IPC: H04B10/079

CPC classification number: H04B10/079

Abstract: Provided is a communication monitoring device and a communication monitoring system capable of monitoring a state of a connection device that forms an optical path by using an optical passive component. A communication management device (8) of a communication monitoring system (1) includes a plurality of photodetectors (11), a plurality of recognition units (14), a processing unit (15), and a transmission unit (16). The photodetectors (11) are provided in a connection device (6). The connection device (6) connects a plurality of optical communication lines (3) by using an optical passive component to form a plurality of optical paths through which optical signals pass. Each photodetector (11) detects an optical signal passing through the corresponding optical path. Each recognition unit (14) recognizes a state of detection of the optical signal by the corresponding photodetector (11). The processing unit (15) generates information regarding a communication state of the connection device (6) on the basis of information regarding the state of detection recognized by each recognition unit (14). The transmission unit (16) transmits the information regarding the communication state of the connection device (6) generated by the processing unit (15) to a receiving unit (9) outside a communication monitoring device (7).