公开(公告)号：US20230362238A1

公开(公告)日：2023-11-09

申请号：US18030140

申请日：2020-10-28

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Keita NISHIMOTO ,  Yukio TOYOSHIMA

IPC: H04L67/1012

CPC classification number: H04L67/1012

Abstract: A communication system includes a branching device, a plurality of acceptance judgement apparatuses connected to the branching device, and processing devices each connected respective one of the plurality of acceptance judgement apparatuses and performing processing according to a received signal. The acceptance judgement apparatus includes a reception unit, a determination unit, and a transfer unit. The reception unit receives one of a plurality of signals which have been broadcast by the branching device. The determination unit determines whether or not to transfer a first signal that is a signal which has been received by the reception unit to one of the processing devices connected to the own apparatus on the basis of the first signal and one or more second signals that are one or more signals which have been received by the reception unit before the first signal. The transfer unit transfers the first signal to one of the processing devices connected to the own apparatus when the determination unit determines to transfer the first signal, and discards the first signal when the determination unit determines not to transfer the first signal.

公开(公告)号：US20230216591A1

公开(公告)日：2023-07-06

申请号：US18008523

申请日：2020-06-08

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Kota Asaka ,  Keita NISHIMOTO ,  Yukio TOYOSHIMA ,  Takashi YAMADA ,  Junichi KANI

IPC: H04B10/291 ,  H04B10/27

CPC classification number: H04B10/291 ,  H04B10/27

Abstract: One aspect of the present invention is a optical main signal processing node apparatus including: an input port for inputting an optical multiplexed with signals pertaining to a plurality of services from an optical transmission path; an output port for outputting an optical signal multiplexed with signals pertaining to a plurality of services to an optical transmission path; a optical main signal processer configured to perform optical main signal processing on an optical signal input from the input port; and a path switch configured to switch a path of the optical signal input from the input port to one of a first path for guiding the optical signal to the output port and a second path for guiding the optical signal to the optical main signal processer.

公开(公告)号：US20230095348A1

公开(公告)日：2023-03-30

申请号：US17908102

申请日：2020-06-10

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yukio TOYOSHIMA ,  Keita NISHIMOTO

IPC: H04Q11/00

Abstract: An optical buffer unit includes a plurality of delay line units each of which gives a delay to optical signals, and a switch that receives an optical signal output from one of the delay line units, includes a first output for outputting the optical signal to a next one of the delay line units and a second output for outputting the optical signal to another apparatus, and outputs the optical signal from the first output or the second output.

公开(公告)号：US20240305370A1

公开(公告)日：2024-09-12

申请号：US18279153

申请日：2021-03-12

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Keita NISHIMOTO ,  Kota ASAKA ,  Yukio TOYOSHIMA

IPC: H04B10/077

CPC classification number: H04B10/0775

Abstract: Provided is an optical transmission system including: an optical transmission apparatus; an optical reception apparatus; a communication device that is a delay measurement target; and a transmission device that transmits a signal between the optical reception apparatus and the communication device, in which the optical transmission apparatus includes a main signal transfer unit that transmits a main signal, the transmission device transmits, to the optical reception apparatus, a first main signal transmitted from the optical transmission apparatus and transmitted via the communication device and a second main signal transmitted from the optical transmission apparatus and not transmitted via the communication device, and the optical reception apparatus includes a reception processing unit that measures a delay occurring in the communication device by using the first main signal and the second main signal transmitted from the transmission device.

公开(公告)号：US20230319441A1

公开(公告)日：2023-10-05

申请号：US18024877

申请日：2020-09-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yukio TOYOSHIMA ,  Keita NISHIMOTO

IPC: H04Q11/00

CPC classification number: H04Q11/0005 ,  H04Q11/0067

Abstract: A signals is input to k (k being an integer 2 or greater) switching units, and is output to one of n (n being an integer of 2 or greater) output ports. The n×k splitter units each corresponding to the respective output ports of the respective switching units split the signals having been output from the corresponding output ports into nk-1 signals. A plurality of receivers are connected to the k splitter units that split signals having been output from the k respective switching units. The combinations of the splitter units to which the respective receivers are connected are different. A receiver accepts received signals when having received the signals from all of the connected k splitter units, but discards received signals when having received the signals from only a part of the connected k splitter units. A control unit controls the output ports to which the respective switching units output signals in accordance with the receiver serving as the destination of data.