-
公开(公告)号：US11916685B2
公开(公告)日：2024-02-27
申请号：US17293743
申请日：2019-11-18
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Kei Kitamura , Fumikazu Inuzuka , Akira Hirano , Masahito Tomizawa , Takuya Ohara
IPC: H04L29/08 , H04L1/22 , H04L1/00 , H04L1/1607
CPC classification number: H04L1/22 , H04L1/0041 , H04L1/0045 , H04L1/1607
Abstract: A transmission apparatus includes redundant first communication devices configured to communicate with a communication apparatus provided in a first network, and redundant second communication devices configured to communicate with a communication apparatus provided in a second network. The second communication devices include respective first ends that are ends of redundant communication paths of the first communication devices, and the first communication devices include respective second ends that are ends of redundant communication paths of the second communication devices.
-
公开(公告)号：US10193566B2
公开(公告)日：2019-01-29
申请号：US14428084
申请日：2013-09-06
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Yoshiaki Yamada , Mitsuhiro Teshima , Kei Kitamura , Kenji Hisadome
Abstract: An object is to enable erasure correction even at the time of a degeneration operation and reduce the number of necessary parallel media through dynamic setting of degree of redundancy. A parallel data encoding/decoding system performs parallel data transmissions using a plurality of lanes from an encoder to a decoder. The encoder encodes products of elements of an encoding vector M of symbols of each lane and a state vector U indicating validity of the symbols, and transmits the state vector U along with a transmission vector Y obtained through the encoding. The decoder decodes a subset Msub constituted of valid elements of the encoding vector M using a received reception vector Y′, the received state vector U, and an erasure vector E indicating whether each element of the transmission vector has been erased in a transmission/reception section.
-
公开(公告)号：US11923862B2
公开(公告)日：2024-03-05
申请号：US17311646
申请日：2019-12-04
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Fumikazu Inuzuka , Kei Kitamura , Akira Hirano , Masahito Tomizawa , Takuya Ohara
Abstract: A first reception processing unit performs a process of receiving a first signal transmitted on a first transmission line, a second reception processing unit performs a process of receiving a second signal transmitted on a second transmission line, and an output speed control unit controls output speeds of the first signal and the second signal subjected to the reception process. A system switching unit selects and outputs the first signal or the second signal subjected to a reception process, and an output processing unit performs a process for output to another apparatus on the output from the system switching unit. A reception side clock output unit outputs a clock signal giving a processing timing of each process, and a clock frequency control unit adjusts a frequency of the clock signal giving the processing timing to the output processing unit. A frequency adjustment range calculation unit calculates an adjustment range of the frequency based on frequency deviation accuracy of the reception side clock output unit, frequency deviation accuracy of a transmission side clock output unit that outputs a clock signal giving a processing timing to a transmission process at a transmission apparatus on the transmission side, and a prescribed value of a frequency deviation.
-
公开(公告)号：US10200116B2
公开(公告)日：2019-02-05
申请号：US15157189
申请日：2016-05-17
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kei Kitamura , Kenji Hisadome , Mitsuhiro Teshima , Yoshiaki Yamada , Osamu Ishida
IPC: H04B10/00 , H04J14/00 , H04B10/032 , H04J3/16 , H04L12/741 , H04L12/801 , H04L12/927 , H04L12/939 , H04Q11/00 , H04L12/911 , H04L12/709 , H04L12/703 , H04L12/851
Abstract: A multilane transmission device that transmits data frames by using a plurality of lanes, comprising: a data frame allocating unit that allocates data frames based on a transmission destination; a flow group information sequence information adding unit that adds flow group information indicating a flow group corresponding to a transmission source and transmission destinations and sequence information indicating a sequence of the data frames to the data frames allocated based on each transmission destination by the data frame allocating unit; and a lane selecting/outputting unit that transmits the data frames having the respective flow group information and the respective sequence information added thereto by the flow group information sequence information adding unit to the transmission destinations by using one or more lanes corresponding to the respective flow group information.
-
公开(公告)号：US09973270B2
公开(公告)日：2018-05-15
申请号：US14377555
申请日：2013-02-21
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kei Kitamura , Kenji Hisadome , Mitsuhiro Teshima , Yoshiaki Yamada , Osamu Ishida
IPC: H04B10/00 , H04J14/00 , H04J3/14 , G06F11/00 , H04L12/26 , H04B10/032 , H04J3/16 , H04L12/911 , H04L12/801 , H04L12/927 , H04L12/939 , H04Q11/00 , H04L12/709 , H04L12/703 , H04L12/851
CPC classification number: H04B10/032 , H04J3/1652 , H04J3/1664 , H04J2203/0094 , H04L45/245 , H04L45/28 , H04L45/745 , H04L47/2433 , H04L47/34 , H04L47/745 , H04L47/805 , H04L49/552 , H04Q11/0005 , H04Q11/0062 , H04Q11/0066 , H04Q2011/0045 , H04Q2011/0081 , H04Q2011/0083 , H04Q2011/0086
Abstract: It is an object to provide a technique capable of using a single framer as a necessary framer and causing the framer to be shared among a plurality of transmission destinations and priorities when coping with a plurality of transmission destinations or priorities and a change in a bandwidth of a physical lane that is caused by a change in a modulation scheme or a change in the number of wavelengths.A multilane transmission device that allocates client signals based on a transmission destination or a priority, decides the number of virtual lanes necessary for transmission of the client signals allocated based on each transmission destination or each priority, allocates the client signals allocated based on each transmission destination or each priority to the virtual lanes whose number has been decided, and frames the client signals allocated to the virtual lanes as transport frames, multiplexes the virtual lanes into a physical lane, and transmits the framed transport frames by using the physical lane.
-
Patent Agency Ranking
公开(公告)号：US20240235690A9
公开(公告)日：2024-07-11
申请号：US18086314
申请日：2022-12-21
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Tetsuro Inui , Hideki Nishizawa , Seiji Okamoto , Akira Hirano , Shokei Kobayashi , Fumikazu Inuzuka , Seiki Kuwabara , Takafumi Tanaka , Kei Kitamura , Takuya Oda
IPC: H04B10/516 , H04B10/077 , H04J14/06
CPC classification number: H04B10/516 , H04B10/0779 , H04J14/06
Abstract: An optical transmission system including an optical transmission device and an optical reception device that receives, via an optical transmission line, a signal transmitted from the optical transmission device, the optical transmission system including a transmission-mode selection unit that selects transmission mode information in descending order of priority out of transmission mode information, which is combinations of a plurality of parameters concerning transmission performance, the transmission mode information being a plurality of kinds of the transmission mode information common to the transmission performance of the optical transmission device and the optical reception device, a signal transmission unit that transmits, to the optical reception device, a signal modulated based on the selected transmission mode information, and a signal reception unit that receives the signal and modulates the received signal based on the transmission mode information selected by the transmission-mode selection unit.
-
公开(公告)号：US20240137128A1
公开(公告)日：2024-04-25
申请号：US18086314
申请日：2022-12-21
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Tetsuro Inui , Hideki Nishizawa , Seiji Okamoto , Akira Hirano , Shokei Kobayashi , Fumikazu Inuzuka , Seiki Kuwabara , Takafumi Tanaka , Kei Kitamura , Takuya Oda
IPC: H04B10/516 , H04B10/077 , H04J14/06
CPC classification number: H04B10/516 , H04B10/0779 , H04J14/06
Abstract: An optical transmission system including an optical transmission device and an optical reception device that receives, via an optical transmission line, a signal transmitted from the optical transmission device, the optical transmission system including a transmission-mode selection unit that selects transmission mode information in descending order of priority out of transmission mode information, which is combinations of a plurality of parameters concerning transmission performance, the transmission mode information being a plurality of kinds of the transmission mode information common to the transmission performance of the optical transmission device and the optical reception device, a signal transmission unit that transmits, to the optical reception device, a signal modulated based on the selected transmission mode information, and a signal reception unit that receives the signal and modulates the received signal based on the transmission mode information selected by the transmission-mode selection unit.
-
公开(公告)号：US20220006577A1
公开(公告)日：2022-01-06
申请号：US17293743
申请日：2019-11-18
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Kei Kitamura , Fumikazu INUZUKA , Akira Hirano , Masahito TOMIZAWA , Takuya OHARA
Abstract: A transmission apparatus includes redundant first communication devices configured to communicate with a communication apparatus provided in a first network, and redundant second communication devices configured to communicate with a communication apparatus provided in a second network. The second communication devices include respective first ends that are ends of redundant communication paths of the first communication devices, and the first communication devices include respective second ends that are ends of redundant communication paths of the second communication devices.
-
公开(公告)号：US10181921B2
公开(公告)日：2019-01-15
申请号：US15527274
申请日：2015-11-26
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Masahiro Yokota , Takafumi Hamano , Takashi Kotanigawa , Kaoru Arai , Kei Kitamura , Hideki Maeda , Yoshiaki Yamada , Takuya Ohara , Kengo Shintaku
IPC: H04J3/16 , H04J14/08 , H04L12/801 , H04L12/939 , H04B10/03 , H04J3/14 , H04J14/00 , H04J14/02
Abstract: A framer in a transmission device that allocates time slots of an optical channel to a logical path, divides client signals received via the logical path to the time slots allocated to the logical path, and transmits the client signals by a plurality of optical subcarriers using optical wavelengths correlated with the time slots includes: a time slot allocating unit configured to perform a process of reducing a transmission band of the logical path when some of the optical wavelengths are unavailable and changing the time slots allocated to the logical path depending on the reduced transmission band to avoid using the time slots corresponding to the unavailable optical wavelengths.
-
公开(公告)号：US20150229329A1
公开(公告)日：2015-08-13
申请号：US14428084
申请日：2013-09-06
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Yoshiaki Yamada , Mitsuhiro Teshima , Kei Kitamura , Kenji Hisadome
CPC classification number: H03M13/1105 , H03M7/3082 , H03M7/6023 , H03M13/1515 , H03M13/353 , H03M13/373 , H03M13/611 , H03M13/618 , H03M13/6561
Abstract: An object is to enable erasure correction even at the time of a degeneration operation and reduce the number of necessary parallel media through dynamic setting of degree of redundancy. A parallel data encoding/decoding system performs parallel data transmissions using a plurality of lanes from an encoder to a decoder. The encoder encodes products of elements of an encoding vector M of symbols of each lane and a state vector U indicating validity of the symbols, and transmits the state vector U along with a transmission vector Y obtained through the encoding. The decoder decodes a subset Msub constituted of valid elements of the encoding vector M using a received reception vector Y′, the received state vector U, and an erasure vector E indicating whether each element of the transmission vector has been erased in a transmission/reception section.
Abstract translation: 目的是即使在退化操作时也能够进行擦除校正，并且通过动态设置冗余度来减少所需的并行介质的数量。 并行数据编码/解码系统使用从编码器到解码器的多个通道来执行并行数据传输。 编码器对每个通道的符号的编码矢量M的元素的乘积和表示符号的有效性的状态向量U进行编码，并且将状态矢量U与通过编码获得的发送矢量Y一起发送。 解码器使用接收到的接收矢量Y'，接收状态向量U和指示传输矢量的每个要素是否在发送/接收中被擦除的擦除矢量E来解码由编码矢量M的有效元素构成的子集Msub 部分。
-
-
-
-
-
-
-
-
-
Search Results
22
records
(took 0.024 seconds)
