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公开(公告)号：US20220123838A1
公开(公告)日：2022-04-21
申请号：US17431668
申请日：2020-02-14
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Rintaro HARADA , Hiroyuki UZAWA , Hirotaka NAKAMURA , Jun TERADA
IPC: H04B10/27
Abstract: A transfer device installed between a host device and a plurality of OLTs in a communication system to which a network with a PON configuration including the plurality of OLTs between the host device and a subordinate device is applied, the transfer device including a frame information acquisition unit configured to monitor downstream frames input from the host device and calculate a statistical value of the downstream frames per a predetermined fixed cycle, a frame storage unit including a plurality of queues each configured to store downstream frames to be transferred to the plurality of OLTs, the frame storage unit configured to store the downstream frames input from the host device, a frame sorting unit configured to input the downstream frames to the plurality of queues in the frame storage unit, and a distribution control determination unit configured to determine the number of frames to be sequentially input by the frame sort unit to the plurality of queues based on the statistical value.
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公开(公告)号：US20220030500A1
公开(公告)日：2022-01-27
申请号：US17298294
申请日：2019-11-28
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Naotaka SHIBATA , Hiroyuki UZAWA , Yoichi FUKADA , Jun TERADA
IPC: H04W40/02 , H04L12/707 , H04L12/751
Abstract: A path control method of controlling a communication path in a network including a plurality of wireless devices communicating with a terminal in a wireless manner and a plurality of wireless control devices communicating with any one of the plurality of wireless devices through a plurality of signal transfer devices includes searching for available communication paths and listing the available communication paths for individual combinations of a wireless device of the plurality of wireless devices and a wireless control device of the plurality of wireless control devices, and selecting a combination of communication paths in which a maximum value of the number of communications passing through the same output port of a signal transfer device of the plurality of signal transfer devices is minimized from among the listed available communication paths.
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公开(公告)号：US20210306362A1
公开(公告)日：2021-09-30
申请号：US17265928
申请日：2019-08-15
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Takahiro KUBO , Hiroyuki UZAWA , Yu NAKAYAMA , Daisuke HISANO , Yoichi FUKADA
IPC: H04L29/06 , H04L12/851 , H04L12/721
Abstract: In a communication control system having a plurality of layer 2 switches and a network controller, the network controller includes a determination unit and an instruction unit, the determination unit being configured to determine whether or not a transfer communication flow feature indicating a feature of a communication flow transferred by a layer 2 switch of the plurality of layer 2 switches is similar to an abnormal communication flow feature indicating a feature of a communication flow when an abnormality occurs; and the instruction unit being configured to: output to the layer 2 switch, when the determination unit determines that the transfer communication flow feature is similar to the abnormal communication flow feature, a first instruction to lower priority of transfer processing for the communication flow and a second instruction to duplicate the communication flow to the layer 2 switch; or output the first instruction to the layer 2 switch, and output, to a server detecting a malicious attack, identification information identifying the communication flow having the transfer communication flow feature.
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公开(公告)号：US20210112016A1
公开(公告)日：2021-04-15
申请号：US17057034
申请日：2019-05-08
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Rintaro HARADA , Hiroyuki UZAWA , Hirotaka NAKAMURA , Daisuke HISANO , Hirotaka UJIKAWA , Jun TERADA
IPC: H04L12/865
Abstract: A transfer apparatus include a distribution unit, a storage unit, and a transfer unit, in which the distribution unit is configured to identify a plurality of networks to which frames belong, distribute the frames for each of the networks based on an identification result, and store the distributed frames in the storage unit, the storage unit is configured to store information of a time at which a frame of the frames is stored in the storage unit and the frame in association with each other, and the transfer unit is configured to detect a period of time for which the frame stays in the storage unit, detect a remaining period to send which is a remaining time of a time for which the frame is permitted to stay in the storage unit, for each of the frames, based on a difference between the time for which the frame stays in the storage unit and the delay upper limit value, and output the frame to a predetermined apparatus based on the remaining period to send.
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公开(公告)号：US20190213334A1
公开(公告)日：2019-07-11
申请号：US16332777
申请日：2017-09-13
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Takeshi SAKAMOTO , Kenji KAWAI , Junichi KATO , Kazuhiko TERADA , Hiroyuki UZAWA , Nobuyuki TANAKA , Tomoaki KAWAMURA
CPC classification number: G06F21/602 , H04B10/11 , H04B10/27 , H04L12/44
Abstract: An OLT (10) is provided with a priority control bypass circuit (16) and an encryption/decryption bypass circuit (17), or an ONU (20) is provided with a priority control bypass circuit (26) and an encryption/decryption bypass circuit (27), and one or both of encryption/decryption processing and priority control processing are bypassed in accordance with a priority control bypass instruction (BP) and an encryption/decryption bypass instruction (BE), which are set in advance. This reduces a processing delay that occurs in the OLT or the ONU.
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Patent Agency Ranking
公开(公告)号：US20240135155A1
公开(公告)日：2024-04-25
申请号：US18269528
申请日：2020-12-28
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Saki HATTA , Hiroyuki UZAWA , Shuhei YOSHIDA , Daisuke KOBAYASHI , Yuya OMORI , Ken NAKAMURA , Koyo NITTA
IPC: G06N3/063
CPC classification number: G06N3/063
Abstract: In a data processing device, a fixed-point position control unit determines, as first control. The fixed-point position control unit causes a detection calculation unit to perform calculation processing on processing target data at a processing point in time. The saturation rate control unit instructs, as second control to be repeated by the fixed-point position control unit, the fixed-point position control unit to move at least the fixed-point position as control to increase a lower limit saturation rate proportional to a magnitude of a counted lower limit counter value with respect to a result of the first control. The fixed-point position control unit performs, as the second control, a predetermined determination on the basis of the instruction from the saturation rate control unit and the metadata, determines the fixed-point position moved for each layer, and causes calculation processing to be performed.
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公开(公告)号：US20220150042A1
公开(公告)日：2022-05-12
申请号：US17435189
申请日：2020-03-02
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Takahiro SUZUKI , Noriyuki OTA , Hiroyuki UZAWA , Hirotaka UJIKAWA
Abstract: A communication system includes a first processor that performs processing for transmitting a signal to and receiving a signal from a communication destination device and a second processor that performs processing of an additional function. The second processor includes a decoding unit that decodes a transmission signal encoded by the first processor or a reception signal encoded by the communication destination device, an information acquiring unit that acquires information from the transmission signal or the reception signal decoded by the decoding unit, an additional function executing unit that performs the processing of the additional function using the information acquired by the information acquiring unit, and an encoding unit that performs processing for encoding the decoded transmission signal and outputting a resulting signal to the communication destination device or processing for encoding the decoded reception signal and outputting a resulting signal to the first processor.
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公开(公告)号：US20220116825A1
公开(公告)日：2022-04-14
申请号：US17298336
申请日：2019-11-28
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Naotaka SHIBATA , Hiroyuki UZAWA , Yoichi FUKADA , Jun TERADA
Abstract: Provided is a path control method of controlling a path of communication in a network including a high priority device dealing with high priority traffic, a high priority control device communicating with the high priority device through a plurality of signal transfer devices transferring signals by periodically repeating a high priority signal transmissible period in which high priority traffic is transmissible and a low priority signal transmissible period in which low priority traffic is transmissible, a low priority device dealing with the low priority traffic, and a low priority control device communicating with the low priority device through the plurality of signal transfer devices, the path control method including calculating a low priority signal transmissible period in each of paths between the low priority device and the low priority control device, and performing setting for switching the path between the low priority device and the low priority control device so that the low priority traffic is transmitted in any one of the calculated low priority signal transmissible periods.
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公开(公告)号：US20200028605A1
公开(公告)日：2020-01-23
申请号：US16483715
申请日：2018-02-06
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Hiroyuki UZAWA , Tatsuya SHIMADA , Daisuke HISANO , Hiroko NOMURA
Abstract: A bandwidth allocation device is included in a communication system having a terminal station device and a terminal device and relaying upstream data, which is received from a communication terminal by a lower device connected to the terminal device, to an upper device connected to the terminal station device. The bandwidth allocation device includes a transmission-permitted period start position determining unit configured to estimate a start position of an arrival period in which the upstream data arrives at the terminal device from the lower device; a transmission-permitted period length determining unit configured to estimate a length of the arrival period based on an amount of upstream data to be transmitted from the lower device to the terminal device; and a bandwidth allocation unit configured to allocate a bandwidth to the terminal device based on the estimated start position and the estimated length of the arrival period.
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公开(公告)号：US20180242337A1
公开(公告)日：2018-08-23
申请号：US15756016
申请日：2015-08-26
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Yuri ARIKAWA , Hiroyuki UZAWA , Kenji KAWAI , Satoshi SHIGEMATSU
IPC: H04W72/12
Abstract: A convergence pattern selection unit (10A) sequentially generates a plurality of different patterns based on designated initial conditions, selects, as a convergence pattern, a pattern in which evaluation value has converged to an extreme value, and repeatedly executes selection of the convergence pattern by changing the initial conditions every time the convergence pattern is selected. A transmission pattern determination unit (10B) selects, as an optimum transmission pattern, one of the convergence patterns obtained by the convergence pattern selection unit (10A), which has the highest evaluation value. This allows searches for an optimum transmission pattern having a better evaluation value.
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