Patents Assigned to Nippon Telegraph and Telephone Corporation
  • Publication number: 20220159512
    Abstract: An event regarding control of a terminal that significantly affects communication quality with which communication between between the terminal and an external communication device is performed is predicted by acquiring surrounding information of the terminal using a surrounding environment information collection unit, and a packet loss caused in communication, communication disconnection, and communication quality that does not meet required performance are prevented using communication control to change setting related to communication, such as selection/addition/deletion of a communication counterpart, selection/change of a communication scheme, a change in modulation scheme, coding rate, and number of spatial multiplexings of communication, and a change in setting of an automatic gain controller of a receiver for communication.
    Type: Application
    Filed: April 26, 2019
    Publication date: May 19, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Riichi KUDO, Takeru INOUE, Atsushi TANIGUCHI, Kohei MIZUNO
  • Publication number: 20220156552
    Abstract: Accurate conversion to data of a conversion target domain is allowed. A training unit 32 trains a forward generator, an inverse generator, a conversion target discriminator, and a conversion source discriminator to optimize an objective function.
    Type: Application
    Filed: February 26, 2020
    Publication date: May 19, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takuhiro KANEKO, Hirokazu KAMEOKA, Ko TANAKA, Nobukatsu HOJO
  • Publication number: 20220159644
    Abstract: In a wireless communication system in which a plurality of wireless stations perform transmission on a shared frequency band, the wireless stations each include means for notifying a wireless station control apparatus of capability and environment information that includes information about capability of a local wireless station and information about a surrounding environment, and the wireless station control apparatus includes control means for selecting, based on capability and environment information. collected from the wireless station, a frequency band to be used for the wireless station capable of using a plurality of frequency bands in accordance with a predetermined control index and setting the selected frequency band. Based on an area coverage rate of the wireless station as the control index, a frequency band with which. an area coverage rate of the wireless station having an area coverage rate of less than or equal to a predetermined threshold is improved is selected.
    Type: Application
    Filed: February 25, 2020
    Publication date: May 19, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hirantha ABEYSEKERA, Toshiro NAKAHIRA, Shoko SHINOHARA, Koichi ISHIHARA, Takafumi HAYASHI, Yasushi TAKATORI
  • Publication number: 20220152453
    Abstract: A technique that enables, even if a video image corresponding to one period is not obtained, estimating a rotational state of an object is provided. The rotational state estimation device includes: an object image generation unit 1 that generates object images, each of the object images being an image of an object, from an input video image; and a rotational state estimation unit 3 that estimates a rotational state of the object by selecting, from among a plurality of hypotheses of the rotational state, a hypothesis of the rotational state, a likelihood of an image of the object resulting from the object in the object image at a certain time being rotated for tc unit time based on the hypothesis of the rotational state being high, using the object image at a time t and the object image at a time t+tc where tc is a predetermined integer of no less than 1.
    Type: Application
    Filed: March 4, 2020
    Publication date: May 19, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Dan MIKAMI, Mariko ISOGAWA, Kosuke TAKAHASHI, Yoshinori KUSACHI
  • Publication number: 20220158731
    Abstract: A wavelength dispersion amount estimation apparatus includes a correlation signal generation unit configured to generate, from a receive signal, a first signal including a main signal of the receive signal and a second signal, which includes an image signal corresponding to the main signal, with a shift by a baud rate of the receive signal relative to the first signal in a frequency domain, a correlation calculation unit configured to calculate a cross correlation of the first signal and the second signal, and a dispersion amount calculation unit configured to calculate a wavelength dispersion amount, based on a position of a peak of the cross correlation.
    Type: Application
    Filed: January 15, 2020
    Publication date: May 19, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kengo HORIKOSHI, Masanori NAKAMURA, Yoshiaki KISAKA, Seiji OKAMOTO, Fukutaro HAMAOKA
  • Publication number: 20220159358
    Abstract: A wiring information creation system includes a switching device that switches a transmission path of an optical signal between an upper network and a lower network in units of combinations of physical ports, a switching control device that outputs, to the switching device, an instruction for switching the transmission path such that the transmission path passes through a selected physical port, a connection control device that determines whether a communication port of an intermediate communication device that relays communication between the upper network and the lower network and the selected physical port have been connected to each other and acquires, from the intermediate communication device, a number of the communication port connected to the selected physical port, and an information creation device that creates connection information indicating the communication port connected to the selected physical port and updates wiring information indicating connection information for each physical port of the
    Type: Application
    Filed: April 23, 2019
    Publication date: May 19, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takumi HARADA, Tomoya HATANO, Hiroo SUZUKI
  • Publication number: 20220155139
    Abstract: It is intended to provide a phase measurement method and a signal processing device that are capable of reducing influence of noise of a measuring device without increasing the peak intensity of an incident light pulse when measuring the phase of scattered light in DAS-P.
    Type: Application
    Filed: March 19, 2020
    Publication date: May 19, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yoshifumi WAKISAKA, Daisuke IIDA, Kunihiro TOGE, Hiroyuki OSHIDA
  • Publication number: 20220156963
    Abstract: A technology for obtaining a coordinate system conversion parameter more easily than in the related art is provided.
    Type: Application
    Filed: February 25, 2020
    Publication date: May 19, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kosuke TAKAHASHI, Dan MIKAMI, Mariko ISOGAWA, Yoshinori KUSACHI
  • Publication number: 20220156672
    Abstract: An information processing apparatus according to an embodiment includes: a registration processing unit configured to register, in a storage device, a work node made up of basic blocks, corresponding to respective processes, connected to each other by a link, the work node including a first node indicating a device/tool used by a worker for performing their work, a second node indicating the worker, a third node indicating a process that is a unit of the work activity, and a fourth node indicating a work target object of the worker in the process; and an analysis processing unit configured to execute analysis processing of analyzing at least one of a history of a work activity performed by a predetermined worker, a history of a work activity performed on a predetermined work target object, and a history indicating a worker and a work target object related to a predetermined work, based on the work node registered in the storage device by the registration processing unit.
    Type: Application
    Filed: February 21, 2020
    Publication date: May 19, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yoshiaki SHOJI, Masateru INOUE, Tomoko SHIBATA, Hiroshi YOSHIDA
  • Patent number: 11336520
    Abstract: With a network design apparatus, a network design method, and a network design processing program, a network configuration is designed for a network in which a transfer apparatus is disposed at each of a plurality of communication hubs and the communication hubs are connected via a link by a link portion apparatus in the transfer apparatus. In design of a network configuration, an optimal combination candidate of a link portion apparatus for each link for minimizing a total cost value in an overall network is calculated on the basis of a combination candidate set of link portion apparatuses. The combination candidate set of the link portion apparatuses is configured using only combination candidates with a cost-effectiveness indicating a ratio of a total capacity to a total cost value of the link portion apparatus higher than a predetermined reference.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: May 17, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Erina Takeshita, Hideo Kawata, Shinichi Yoshihara
  • Patent number: 11336491
    Abstract: An amplifier output from an amplifier to an SR latch is used as a feedback signal through a buffer. An adder having a combination of an addition unit and an xh block is provided within the amplifier and transmits a feedback signal (analog signal) generated from the feedback signal FBD (digital signal) by the xh block to the addition unit and adds it to an output from a latch block. In the amplifier, the operation for adding the output from the latch block and the feedback signal occurs during a latch operation in the latch block.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: May 17, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Il-Min Yi, Naoki Miura, Hiroyuki Fukuyama, Hideyuki Nosaka
  • Patent number: 11335661
    Abstract: A first signal electrode and a second signal electrode are connected by a first wire, a first ground electrode and a fourth ground electrode are connected by a second wire, and a second ground electrode and a third ground electrode are connected by a third wire. The second wire and the third wire cross at only one position above the first wire.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: May 17, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Miwa Muto, Hideaki Matsuzaki
  • Patent number: 11335986
    Abstract: A high frequency connection structure includes: a waveguide; a ridge coupler constituted by a conductor formed inside one end of the waveguide; a transmission line adjacent to the one end of the waveguide; an inductance adjustment structure which is provided between the ridge coupler and the transmission line and which adjusts ground inductance that is created due to a connection between the ridge coupler and the waveguide; and a wire which connects one end of the ridge coupler on a side of the transmission line and one end of the transmission line with each other.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: May 17, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hiroshi Hamada, Teruo Jo, Hideyuki Nosaka
  • Patent number: 11335118
    Abstract: A signal output unit outputs an acquired signal. A signal accumulation unit accumulates signals. A signal attribute value display unit displays a value of an attribute related to an element constituting a target represented by the acquired signal or a signal generation source in a state in which an instruction for changing the value of the attribute is able to be received. A changed attribute value acquisition unit acquires a changed value of the attribute when the instruction for changing the value of the attribute is received. A signal retrieval unit retrieves, from the signals accumulated in the signal accumulation unit, a signal similar to a changed signal when the value of the attribute has been changed on the basis of the changed value of the attribute acquired by the changed attribute value acquisition unit.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: May 17, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takuhiro Kaneko, Kaoru Hiramatsu, Kunio Kashino
  • Patent number: 11334744
    Abstract: A large-scale point cloud having no limitation on the range or the number of points is set as an object, and labels are attached to the points constituting the object regardless of the type of object.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: May 17, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yasuhiro Yao, Hitoshi Niigaki, Ken Tsutsuguchi, Tetsuya Kinebuchi
  • Patent number: 11336436
    Abstract: A key distribution system includes a representative user terminal 2p, a server apparatus 3, and an (n+1)-th user terminal 2n+1. The representative user terminal 2p uses a public key for the (n+1)-th user terminal 2n+1 and information for identifying the (n+1)-th user terminal 2n+1 to encrypt key information with a predetermined encryption function in Certificate-less Encryption to obtain ciphertext. The server apparatus 3 sends the ciphertext to the (n+1)-th user terminal 2n+1 when the (n+1)-th user terminal 2n+1 is added. The (n+1)-th user terminal 2n+1 uses a complete secret key for the (n+1)-th user terminal 2n+1 and the information for identifying the (n+1)-th user terminal 2n+1 to decrypt the ciphertext with a predetermined decryption function to obtain the key information.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: May 17, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Reo Yoshida, Tetsutaro Kobayashi, Yuto Kawahara, Hitoshi Fuji, Kazuki Yoneyama
  • Patent number: 11336441
    Abstract: A communication terminal which is capable of reducing load of a server apparatus by reutilizing a message key to be used for encrypting a message is provided.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: May 17, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yuki Okano, Reo Yoshida, Ryo Nishimaki, Tetsutaro Kobayashi
  • Publication number: 20220149709
    Abstract: An operation on a vibration device presenting a force sense based on vibration to a human body is simplified. The vibration device includes: a base mechanism; an actuator configured to perform a physical motion based on a supplied control signal; a slide mechanism configured to perform a periodic reciprocating slide motion in a predetermined direction and an opposite direction to the predetermined direction with respect to the base mechanism based on the physical motion of the actuator and to give a force based on the reciprocating slide motion to a part of a human body with which the slide mechanism comes into direct or indirect contact; and a detection unit located in the predetermined direction with respect to the slide mechanism and configured to detect displacement of a specific portion included in the slide mechanism.
    Type: Application
    Filed: February 25, 2020
    Publication date: May 12, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventor: Hiroaki GOMI
  • Publication number: 20220150182
    Abstract: An object of the present disclosure is to enable reduction of network congestion and concentration of communication on a server side that locally occur at the time of a disaster, an event, or the like and to enable important communication.
    Type: Application
    Filed: February 7, 2020
    Publication date: May 12, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tetsuya SUZUKI, Takayuki KUSAKABE
  • Publication number: 20220147620
    Abstract: An evaluation device receives input of latent variables of a variational autoencoder, clusters the input latent variables, and assigns, for each cluster, a label indicating the cluster to latent variables belonging to the cluster. After that, the evaluation device performs learning of a classifier so as to accurately classify the latent variables based on the assigned label, performs an adversarial attack resistance evaluation for the classifier after learning, and outputs a result of the resistance evaluation. Thus, the evaluation device can perform an adversarial attack resistance evaluation even for a variational autoencoder that uses unlabeled data as input data.
    Type: Application
    Filed: March 11, 2020
    Publication date: May 12, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tomokatsu TAKAHASHI, Masanori YAMADA