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1. 发明申请

US20140211814A1 COMMUNICATION SYSTEM, TRANSMITTER APPARATUS AND RECEIVER APPARATUS 有权
标题翻译：通信系统，发射机设备和接收机设备
公开(公告)号：US20140211814A1
公开(公告)日：2014-07-31
申请号：US14236557
申请日：2012-09-25
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Junichi Abe , Kiyoshi Kobayashi
IPC分类号： H04J4/00
CPC分类号： H04J4/00 , H04B1/69 , H04L27/2626 , H04L27/2636 , H04L27/2647
摘要： A transmitter of a communication system includes a spectrum dividing section which divides a transmission signal into a plurality of sub-spectra at a first sampling speed F1 and combines one or more low-speed intermediate composite signals from the divided sub-spectra, and a multiplexing section which multiplexes the intermediate composite signals at a second sampling speed F2 faster than the first sampling speed F1 (F2>F1) and distributes to a broadband. A receiver includes a demultiplexing section which extracts one or more low-speed intermediate composite signals from a reception signal at the second sampling speed F2, and a spectrum combining section which combines the intermediate composite signals at the first sampling speed F1 and extracts the sub-spectra to re-combines the transmission signal.
摘要翻译：通信系统的发射机包括频谱分割部分，其以第一采样速度F1将传输信号分成多个子频谱，并且组合来自分割子频谱的一个或多个低速中间复合信号，以及复用该部分以比第一采样速度F1（F2> F1）更快的第二采样速度F2复用中间复合信号并分配到宽带。接收机包括从第二采样速度F2的接收信号中提取一个或多个低速中间复合信号的解复用部分，以及以第一采样速度F1组合中间复合信号的频谱组合部分，光谱重新组合传输信号。

2. 发明公开

US20230412272A1 MIGRATION ASSIST DEVICE, MIGRATION METHOD AND OPTICAL ACCESS SYSTEM 审中-公开
公开(公告)号：US20230412272A1
公开(公告)日：2023-12-21
申请号：US18035223
申请日：2020-11-10
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Satoshi SHIMAZU , Tomoaki YOSHIDA , Takayoshi TASHIRO , Kenta ITO
IPC分类号： H04B10/27
CPC分类号： H04B10/27
摘要： A transition assistance device that assists device replacement in an optical access system including a transition source subscriber line terminal station device and a transition destination subscriber line terminal station device, the transition assistance device including: a first member, and a second member that is movable, in which the first member includes a first port for connecting to the transition source subscriber line terminal station device, and a second port for connecting to the transition destination subscriber line terminal station device, the second member includes a third port for connecting to one or more subscriber line terminal devices connected to the transition source subscriber line terminal station device, and at a start of the device replacement, the first port and the third port are connected to each other via a connection line; a cutting unit that cuts the connection line connecting the first port and the third port to each other after the transition assistance device is connected to the transition destination subscriber line terminal station device via the second port; a movement control unit that moves the second member after the connection line is cut; and a connection unit that connects the second port and the third port to each other with connection lines after movement of the second member.

3. 发明申请

US20170272167A1 Station-Side Apparatus in Optical Transmission System, Optical Transmission System, and Optical Transmission Method 有权
公开(公告)号：US20170272167A1
公开(公告)日：2017-09-21
申请号：US15505559
申请日：2015-08-19
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Kenji KAWAI , Yuki ARIKAWA , Tomoaki KAWAMURA , Nobuyuki TANAKA , Satoshi SHIGEMATSU , Naoki MIURA
IPC分类号： H04B10/27 , H04B10/40
CPC分类号： H04B10/27 , H04B10/40 , H04L12/44
摘要： An OLT (1) is formed by N optical transceivers (11), one PON control circuit (12), and one selection and distribution circuit (13). An optical transceiver selection control signal (SC) is transferred from the PON control circuit (12) to the selection and distribution circuit (13). The optical transceiver selection control signal (SC) indicates the timing of a discovery window, the timing of a grant, and a logical link identification number of a registered ONU assigned to the grant (a logical link identification number for a logical link with the registered ONU). The selection and distribution circuit (13) selects one optical transceiver (11-s (s is an integer falling within a range of 0 to N−1)) from the optical transceivers (11-0 to 11-N−1) based on the optical transceiver selection control signal (SC) from the PON control circuit (12).

4. 发明公开

US20240250768A1 OPTICAL AMPLIFICATION SYSTEM, OPTICAL AMPLIFICATION APPARATUS AND OPTICAL AMPLIFICATION METHOD 审中-公开
公开(公告)号：US20240250768A1
公开(公告)日：2024-07-25
申请号：US18289380
申请日：2021-05-21
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Shimpei SHIMIZU , Takushi KAZAMA , Takayuki KOBAYASHI , Yutaka MIYAMOTO , Takeshi UMEKI
IPC分类号： H04J14/02
CPC分类号： H04J14/0209 , H04J14/02216
摘要： The present invention provides an optical amplification system (1) having a plurality of cascade-connected optical amplification units (11), wherein the optical amplification units (11) comprise: a band division unit (111) that divides an optical signal into optical signals of two different bands; a polarized wave division unit (112) that divides the divided optical signals into two polarized wave components orthogonal to each other, an excitation light multiplexing unit (113) that multiplexes excitation light and the optical signals divided by the polarized wave division unit (112); an amplification medium (115) that generates an optical parametric amplification and amplifies the optical signals; an excitation light division unit (117) that divides the excitation light and the optical signals amplified by the amplification medium (115); a polarized wave synthesis unit (118) that synthesizes the two divided polarized wave components; and a band multiplexing unit (119) that multiplexes the two divided bands.

5. 发明公开

US20240056179A1 TRANSMISSION APPARATUS AND TRANSMISSION METHOD 审中-公开
公开(公告)号：US20240056179A1
公开(公告)日：2024-02-15
申请号：US17766451
申请日：2019-10-30
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Kei KITAMURA , Fumikazu INUZUKA , Kengo SHINTAKU , Takafumi TANAKA , Takuya ODA
IPC分类号： H04B10/032 , H04Q11/00
CPC分类号： H04B10/032 , H04Q11/0062 , H04Q2213/08 , H04Q2011/0081
摘要： A transmission apparatus includes a first communication unit, a second communication unit, a detection unit, a control unit, and a selection unit. The first communication unit uses a first path for communication, when electric power is supplied. The second communication unit uses a second path for communication, when electric power is supplied. The detection unit detects a fault predictive sign. The control unit supplies no electric power to the second communication unit when the detection unit does not detect the fault predictive sign. The control unit starts supplying electric power to the second communication unit and performs normality confirmation of the second path when the detection unit detects the fault predictive sign, before switching from the first path to the second path. The selection unit selects and outputs, when the first communication unit and the second communication unit have received signals, either the signal received by the first communication unit or the signal received by the second communication unit.

6. 发明申请

US20190238372A1 Radio Communication System And Radio Communication Method 审中-公开
公开(公告)号：US20190238372A1
公开(公告)日：2019-08-01
申请号：US16343994
申请日：2017-11-06
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Kenji MIYAMOTO , Jun TERADA , Tatsuya SHIMIZU
IPC分类号： H04L25/03 , H04L25/02 , H04L25/06
CPC分类号： H04L25/03318 , H04B7/022 , H04L25/0204 , H04L25/0224 , H04L25/067 , H04L27/00 , H04W88/08 , H04W92/12
摘要： A radio communication system includes a radio apparatus and a signal processing apparatus that function as a base station, and the radio apparatus includes a channel estimation unit that, on the basis of a radio signal transmitted from a terminal apparatus, estimates channel information relating to a radio transmission path between the radio apparatus and the terminal apparatus; a demodulation unit that performs soft-decision demodulation of the radio signal on the basis of the channel information estimated by the channel estimation unit; a signal switching unit that, depending on the terminal apparatus that transmitted the radio signal, switches an output destination of a log likelihood ratio obtained by the soft-decision modulation between either a first path passing through a decoding unit that decodes the log likelihood ratio or a second path not passing through the decoding unit; and a transmission unit that transmits a signal output from the first path or the second path to the signal processing apparatus.

7. 发明公开

US20240230464A1 OPTICAL MONITOR DEVICE 审中-公开
公开(公告)号：US20240230464A1
公开(公告)日：2024-07-11
申请号：US18288988
申请日：2021-05-28
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Ryo KOYAMA , Yoshiteru ABE , Kazunori KATAYAMA
IPC分类号： G01M11/00 , G01M11/02
CPC分类号： G01M11/37 , G01M11/0207
摘要： The present disclosure aims to reduce the size and cost of this optical monitoring device that detects the intensity of light propagating through an optical fiber.
The present disclosure relates to an optical monitoring device for detecting the intensity of light propagating through an optical fiber, the optical monitoring device comprising an optical component that branches part of incident light in a first direction and branches the rest in a second direction at a specific branching ratio and emits the light, wherein the optical component includes: a single-layer film having a uniform thickness; an incident-side member provided on the incident side of the single-layer film; and an outgoing-side member provided on the outgoing side of the single-layer film, a first refractive index interface between the single-layer film and the incident-side member and a second refractive index interface between the single-layer film and the outgoing-side member are provided at a specific angle with an optical axis of the incident light, the first direction is a direction in which the light transmits through the first refractive index interface and the second refractive index interface, and the second direction is a direction in which the light is reflected on the first refractive index interface and the second refractive index interface.

8. 发明公开

US20240214004A1 ENCODING/DECODING APPARATUS,ENCODING/DECODING METHOD AND PROGRAM 审中-公开
公开(公告)号：US20240214004A1
公开(公告)日：2024-06-27
申请号：US18286221
申请日：2021-05-11
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Shinobu KUDO , Ryuichi TANIDA , Hideaki KIMATA
IPC分类号： H03M7/30
CPC分类号： H03M7/3082 , H03M7/6005 , H03M7/6011
摘要： An encoding and decoding device includes: an encoding unit configured to convert input data into an encoded feature vector; a quantization accuracy derivation unit configured to derive quantization accuracy for each encoded feature which is an element of the encoded feature vector in accordance with an encoded code amount, a quantization unit configured to generate a quantized encoded feature vector with a size of a quantized code amount which targets the encoded code amount by executing quantization processing on the encoded feature vector based on the quantization accuracy; and a binarization unit configured to generate encoded data by performing binarization processing on the quantized encoded feature vector.

9. 发明公开

US20240142696A1 MODE CONVERSION DEVICE AND DESIGN METHOD 审中-公开
公开(公告)号：US20240142696A1
公开(公告)日：2024-05-02
申请号：US18277320
申请日：2021-02-17
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Yoko YAMASHITA , Takayoshi MORI , Takashi MATSUI , Kazuhide NAKAJIMA
IPC分类号： G02B6/02 , G02B27/00
CPC分类号： G02B6/02095 , G02B27/0012
摘要： An objective of the present invention is to provide a mode conversion device capable of designing any coupling efficiency and full width at half maximum, and a design method therefor.
According to the present invention, a mode conversion device includes a long period grating at a core of an optical fiber through which light is able to propagate in at least two propagation modes. The long period grating satisfies a relationship of Expression C1, where a full width at half maximum FWHM is a wavelength band in which the coupling efficiency is a half of coupling efficiency of mode conversion at a center wavelength, C is coupling efficiency, Lc is a complete coupling length, Lg is a grating length, Λ is a grating pitch, and Δβ is a propagation constant difference between the two propagation modes at the center wavelength of a mode conversion target.

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10. 发明公开

US20230358966A1 OPTICAL SIDE INPUT/OUTPUT CIRCUIT AND OPTICAL CONNECTOR 审中-公开
公开(公告)号：US20230358966A1
公开(公告)日：2023-11-09
申请号：US18026381
申请日：2020-09-18
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Yoko YAMASHITA , Takashi MATSUI , Kazuhide NAKAJIMA
IPC分类号： G02B6/34
CPC分类号： G02B6/34
摘要： The present invention aims to provide an optical side input/output circuit that has wavelength selectivity and is easily disposed at multiple points in a transmission path, and an optical connector.
The optical side input/output circuit 301 includes: a tap portion 10 in which a tap waveguide 53 that outputs light of a higher-order mode from a side surface of an optical fiber 50 is formed, the light of the higher-order mode being of light propagating in the core 51 of the optical fiber 50; and a grating portion 20 that is located in a stage before the tap portion 10 in the propagation direction of the light, and has a grating 21 that converts light of a desired wavelength from a basic mode to the higher-order mode, the grating 21 being formed in the core 51 of the optical fiber 50.

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