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：US20230275664A1

公开(公告)日：2023-08-31

申请号：US18017663

申请日：2020-07-27

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Keita NISHIMOTO ,  Kota ASAKA ,  Junichi KANI

IPC: H04B10/2581 ,  H04B10/50 ,  H04L12/44

CPC classification number: H04B10/2581 ,  H04B10/501 ,  H04L12/44

Abstract: An optical communication system allowing for transmission and reception of, between a dynamic bandwidth allocation functional unit that dynamically allocates a bandwidth for uplink communication and a subscriber-side communication device, transmission volume information indicating the amount of information waiting to be transmitted that is stored in the subscriber-side communication device and transmission instruction information for a provider-side communication device to instruct the subscriber-side communication device on a transmission timing for transmitting the transmission volume information, the optical communication system including: a transmission instruction information encoder that acquires multi-level transmission instruction information from the dynamic bandwidth allocation functional unit, converts the multi-level transmission instruction information into binary transmission instruction information, and transmits the encoded binary transmission instruction information to a transmission instruction information decoder; a transmission instruction information decoder that converts the decoded binary transmission instruction information into multi-level transmission instruction information, and outputs the multi-level transmission instruction information to the subscriber-side communication device; a transmission volume information encoder that acquires multi-level transmission volume information from the subscriber-side communication device, converts the multi-level transmission volume information into binary transmission volume information, and transmits the encoded binary transmission volume information to a transmission volume information decoder; and a transmission volume information decoder that converts the decoded binary transmission volume information into multi-level transmission volume information, and outputs the multi-level transmission volume information to the dynamic bandwidth allocation functional unit.

公开(公告)号：US20230261778A1

公开(公告)日：2023-08-17

申请号：US18015849

申请日：2020-07-17

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Keita NISHIMOTO ,  Kota ASAKA ,  Junichi KANI

IPC: H04J14/02

CPC classification number: H04J14/021

Abstract: A transmitter management device includes: a reception unit that receives a virtual switch configuration request from an upper management system; a determination unit that determines a plurality of paths including transfer processing by different optical transmitters on the basis of the configuration request received by the reception unit; and a setting unit that performs a setting for a plurality of the optical transmitters in such a way that a virtual switch that executes transfer processing on the basis of the paths determined by the determination unit is configured for each one of a plurality of the paths.

公开(公告)号：US20200177280A1

公开(公告)日：2020-06-04

申请号：US16631513

申请日：2018-07-19

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hirotaka UJIKAWA ,  Noriyuki OOTA ,  Kota ASAKA

IPC: H04B10/27 ,  H04L12/911

Abstract: A virtual subscriber line terminal station device includes a software component including software to be added in accordance with a service requirement; and hardware having general-purpose functions; wherein the hardware includes a communication unit that receives a bandwidth allocation request transmitted by a subscriber line termination device; and the software component includes a bandwidth allocation component. The bandwidth allocation component has an individual unit that, based on an algorithm for allocating bands, computes a bandwidth to be allocated to the subscriber line termination device that transmitted the bandwidth allocation request; a common unit that, in accordance with the bandwidth allocated by the individual unit, allocates the bandwidth to the subscriber line termination device; and an interface between the individual unit and the common unit. The common unit converts the bandwidth allocation request received by the communication unit to a format that can be used by the individual unit. The individual unit computes the bandwidth to be allocated to the subscriber line termination device that transmitted the bandwidth allocation request that is converted, by the common unit, to a format that can be used by the individual unit.

公开(公告)号：US20190312661A1

公开(公告)日：2019-10-10

申请号：US16309016

申请日：2017-06-19

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Katsuhisa TAGUCHI ,  Kota ASAKA

IPC: H04J14/02 ,  H04B10/40

Abstract: An optical transceiver includes a wavelength-tunable transmission unit configured to transmit an optical transmission signal, a wavelength-tunable reception unit configured to receive an optical reception signal, a wavelength table configured to store a plurality of combinations of a transmission wavelength and a reception wavelength, an input terminal configured to input a wavelength selection signal, and a control unit configured to select one combination of the transmission wavelength and the reception wavelength from the wavelength table based on the wavelength selection signal, and perform transmission wavelength control for setting the selected transmission wavelength in the wavelength-tunable transmission unit as a wavelength of the optical transmission signal and reception wavelength control for setting the selected reception wavelength in the wavelength-tunable reception unit as a wavelength of the optical reception signal.

公开(公告)号：US20190123845A1

公开(公告)日：2019-04-25

申请号：US16309018

申请日：2017-06-19

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Katsuhisa TAGUCHI ,  Kota ASAKA

IPC: H04J14/02 ,  H04B10/40 ,  H04B10/27 ,  H04B10/572

Abstract: An optical transceiver includes: a wavelength-tunable transmitter transmitting an optical transmission signal; a wavelength-tunable receiver receiving an optical reception signal; a wavelength table storing a plurality of wavelengths; an input terminal inputs a wavelength selection signal; and a control unit that identifies one of the optical transmission signal and the optical reception signal as a target based on the wavelength selection signal, selects the wavelength from the wavelength table based on the wavelength selection signal, performs transmission wavelength control in which the selected wavelength is set in the wavelength-tunable transmitter as a wavelength of the optical transmission signal in the case that the optical transmission signal is identified as the target, and performs reception wavelength control in which the selected wavelength is set in the wavelength-tunable receiver as a wavelength of the optical reception signal in the case that the optical reception signal is identified as the target.

公开(公告)号：US20220368417A1

公开(公告)日：2022-11-17

申请号：US17623967

申请日：2019-07-01

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Takeshi IMAI ,  Kota ASAKA ,  Takuya KANAI

IPC: H04B10/114

Abstract: A station-side telescope included in a station-side optical antenna unit is configured to transmit and receive an optical signal, a guide light source is configured to emit guide light in a direction of orientation of the station-side telescope, a node-side telescope is configured to transmit and receive an optical signal, a node-side control unit included in a node-side optical antenna unit is configured to generate and output a control signal for moving a node-side base based on a position of the guide light included in an image obtained by a camera capturing the guide light emitted by the guide light source so that a direction of orientation of the node-side telescope faces the direction of orientation of the station-side telescope, an antenna drive unit is configured to receive the control signal and generate and output a drive signal based on the control signal, and the node-side base included in the node-side optical antenna unit is configured to support the node-side telescope and receive the drive signal to change a direction of orientation of the node-side telescope.

公开(公告)号：US20210051382A1

公开(公告)日：2021-02-18

申请号：US16976357

申请日：2019-02-21

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takamitsu TOCHINO ,  Takashi MITSUI ,  Kota ASAKA ,  Tomoya HATANO

IPC: H04Q11/00

Abstract: Transmitting devices used in an optical access system in which a plurality of the transmitting devices transmit an optical burst signal to a receiving device by time division multiple access, the transmitting devices each including an arithmetic processing unit, the arithmetic processing unit including: a data signal transmission instruction unit, the a data signal transmission instruction unit that outputs a first instruction for controlling transmission processing of a data signal on the basis of a requester's instruction; an optical signal control instruction unit that outputs a second instruction for controlling output processing of an optical signal on the basis of the requester's instruction; and an instruction output adjustment unit that adjusts a timing at which the first instruction is output and a timing at which the second instruction is output.

公开(公告)号：US20180145758A1

公开(公告)日：2018-05-24

申请号：US15573706

申请日：2016-05-19

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Katsuhisa TAGUCHI ,  Kota ASAKA

IPC: H04B10/272 ,  H04B10/69 ,  H04B1/16

CPC classification number: H04B10/272 ,  H04B1/16 ,  H04B10/69 ,  H04J14/02 ,  H04J14/0282

Abstract: A subscriber device includes a demultiplexer configured to demultiplex input wavelength-multiplexed light into a plurality of light signals for each wavelength, a plurality of light receivers configured to receive each of the plurality of light signals obtained through demultiplexing by the demultiplexer and to convert the light signals into electrical signals, a plurality of limiting amplifiers configured to amplify each of the plurality of electrical signals output from the plurality of light receivers, and a plurality of signal selection units configured to select a plurality of signals to be received from among a plurality of amplified signals output from the plurality of limiting amplifiers.

公开(公告)号：US20180131461A1

公开(公告)日：2018-05-10

申请号：US15564231

申请日：2016-04-20

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tomoaki YOSHIDA ,  Kota ASAKA ,  Shunji KIMURA

IPC: H04J14/02 ,  H04Q11/00 ,  H04L12/803

CPC classification number: H04J14/0247 ,  H04J14/02 ,  H04J14/0223 ,  H04L12/44 ,  H04L47/125 ,  H04L47/762 ,  H04Q11/0067 ,  H04Q2011/0083 ,  H04Q2011/0086

Abstract: In a case where a wavelength to be assigned to a subscriber-side device, to which a downstream wavelength has been assigned, is to be changed from the currently used (Source) downstream wavelength to a different changeover target (Target) downstream wavelength, a downstream wavelength changeover instruction message that indicates the change target wavelength is generated. In a case where a wavelength to be assigned to the subscriber-side device, to which an upstream wavelength has been assigned, is to be changed from the currently used (Source) upstream wavelength to a different changeover target (Target) upstream wavelength, an upstream wavelength changeover instruction message that indicates the change target wavelength is generated. The downstream wavelength changeover instruction message and the upstream wavelength changeover instruction message are respectively independently generated, and only the wavelength for which the wavelength changeover instruction message was generated is changed.