公开(公告)号：US20250081270A1

公开(公告)日：2025-03-06

申请号：US18697561

申请日：2021-10-04

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yuka OKAMOTO ,  Tatsuya SHIMADA ,  Yoshihito SAKAI ,  Hirotaka UJIKAWA ,  Kenji MIYAMOTO ,  Hiroko NOMURA

IPC: H04W76/20 ,  H04W28/02 ,  H04W28/08 ,  H04W72/52

Abstract: A switching control apparatus calculates a traffic amount in a predetermined period of each first transmission apparatus that is a transmission apparatus of a predetermined layer on the basis of allocation of radio resources to a terminal that wirelessly transmits a signal to a lowermost transmission apparatus among a plurality of transfer apparatuses that constitute a communication network hierarchized into a plurality of layers and transfer a received signal to a layer next above. The switching control apparatus calculates a processing capability predicted to be required for each second transmission apparatus which is a transmission apparatus of a layer next above the first transmission apparatus on the basis of the traffic amount of the first transmission apparatus. The switching control apparatus instructs a transfer apparatus for transferring a signal transmitted from the first transmission apparatus to the second transmission apparatus to switch a connection destination of the first transmission apparatus under the control of the second transmission apparatus in which congestion is determined to occur on the basis of the processing capability.

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：US20240323575A1

公开(公告)日：2024-09-26

申请号：US18694813

申请日：2021-10-04

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Karin UMEDA ,  Kota ASAKA ,  Hiroko NOMURA ,  Hiroshi O ,  Yoshihito SAKAI ,  Hirotaka UJIKAWA ,  Kenji MIYAMOTO ,  Yuka OKAMOTO ,  Tatsuya SHIMADA

IPC: H04Q11/00 ,  H04B10/27

CPC classification number: H04Q11/0062 ,  H04B10/27 ,  H04Q2011/0086

Abstract: A control device including a collection unit that acquires, at a predetermined cycle, cooperation information, which is information indicating a communication state between a communication system that includes a wireless station including an antenna and an allocation device that allocates a wavelength, and a terminal to be communicated, an analysis unit that analyzes the communication state in the communication system on the basis of the cooperation information, and an allocation control unit that controls execution of wavelength allocation by the allocation device on the basis of an analysis result of the analysis unit.

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：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).

公开(公告)号：US20230327755A1

公开(公告)日：2023-10-12

申请号：US18024939

申请日：2020-09-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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

IPC: H04B10/07

CPC classification number: H04B10/07

Abstract: Provided is 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 monitoring system (1) includes a plurality of photodetectors (9) provided in a connection device (6), a plurality of recognition units (13), a processing unit (14), a light emitting unit (15), a mixing unit (12), a separation unit (16), a collection unit (17), and a management unit (18). The photodetector (9) detects an optical signal passing through a corresponding optical path. The recognition unit (13) recognizes a state of detection by the corresponding photodetector (9). The processing unit (14) generates information regarding a communication state of the connection device (6) on the basis of the recognition by each recognition unit (13). The light emitting unit (15) converts the generated information into a monitoring signal that is an optical signal and transmits the monitoring signal. The monitoring signal is passed through an optical communication line (3) as a mixed signal by the mixing unit (12) and is separated from the mixed signal by the separation unit (16). The collection unit (18) outputs the separated monitoring signal to the management unit (18) that manages a state of a PON (2).

公开(公告)号：US20240414646A1

公开(公告)日：2024-12-12

申请号：US18699762

申请日：2021-10-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hirotaka UJIKAWA ,  Tatsuya SHIMADA ,  Yoshihito SAKAI ,  Kenji MIYAMOTO ,  Yuka OKAMOTO

IPC: H04W52/02

Abstract: A first transmission apparatus receives a data signal transmitted by a communication apparatus from a lower transmission apparatus sets the received data signal in a data unit, and transmits the data unit. A second transmission apparatus receives the data unit transmitted by the first transmission apparatus. An electric power controller calculates an arrival start timing that is a timing at which the data unit including a data signal transmitted from a communication apparatus starts to arrive at the second transmission apparatus on a basis of a code rate and a size of a data transmission block used when the communication apparatus transmits the data signal, and performs control such that a sleep state of a signal processor that performs processing on the data unit in the second transmission apparatus is ended before the arrival start timing.

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).