Patents Assigned to Nippon Telegraph and Telephone
  • Patent number: 11983543
    Abstract: An information processing device includes processing circuitry configured to determine whether or not there is integrity in predetermined data regarding a boot sequence of an Operating System (OS) during execution of shutdown of the OS, arid suspend shutdown of the OS when it is determined that there is no integrity in the predetermined data.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kenichiro Muto, Kimihiro Yamakoshi, Takeshi Nakatsuru
  • Patent number: 11980791
    Abstract: A living body guidance device includes: a measurement unit 1 that measures biometric information of a user; a stimulus unit 2 that is installed in contact with the user's body and presents a tactile stimulus to the user; a database unit 3 that has a relationship between the tactile stimulus presented by the stimulus unit and the biometric information according to the tactile stimulus recorded; an input unit 4 that sets target biometric information which is target biometric information that is desired of the user to realize; and a control unit 7 that, when there is a difference between current biometric information which is current biometric information of the user estimated based on the measurement result by the measurement unit and the target biometric information, controls the tactile stimulus presented by the stimulus unit so that the difference is reduced, so as to guide the user so that the current biometric information approaches the target biometric information, based on the relationship recorded in th
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Mana Sasagawa, Arinobu Niijima, Kana Eguchi, Ryosuke Aoki, Takashi Isezaki, Tomoki Watanabe, Toshitaka Kimura
  • Patent number: 11984903
    Abstract: To provide a variable reference voltage source for which a measuring instrument is unnecessary for calibration on the outside. A variable reference voltage source that generates a variable reference voltage corresponding to setting data set from outside includes a control unit including a calibration control unit that controls operation for calibrating an offset and a predetermined unit voltage inside the variable reference voltage source and an output control unit that controls operation for outputting the variable reference voltage, a reference voltage unit that outputs a reference voltage Vref, and an integrated-voltage generating unit that repeats, when the calibration control unit controls the operation, an integrating operation until an integrated voltage obtained by integrating the predetermined unit voltage becomes equal to the reference voltage Vref and outputs, when the output control unit controls the operation, the variable reference voltage corresponding to the setting data.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tadashi Minotani, Kenichi Matsunaga
  • Patent number: 11983249
    Abstract: An error determination device includes a class estimation process observation unit configured to acquire data in a process of being estimated, from a class estimation unit that estimates a class of data to be classified and generate an estimation process feature vector based on the acquired data; and an error determination unit configured to accept input of the estimation process feature vector generated by the class estimation process observation unit and a classification result output from the class estimation unit and determine whether the classification result is correct or incorrect based on the estimation process feature vector and the classification result, wherein the error determination unit is a functional part generated by machine learning based on an estimation process feature vector list created by adding a pseudo feature vector to an estimation process feature vector list generated by the class estimation process observation unit and on a learning error-correction list indicating that a class co
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventor: Hidetoshi Kawaguchi
  • Patent number: 11985059
    Abstract: There is provided route control with excellent flexibility even in a large-scale multicast transfer system. A multicast transfer system transfers a multicast packet arriving at a plurality of destinations between multicast communication devices 1, and a packet transfer processing unit 15 of the multicast communication device 1 transfers, when an interface of a multicast communication device 1 adjacent to itself is specified as a transfer destination of a received multicast packet, the multicast packet to the specified interface, and transfers, when the interface of the multicast communication device 1 adjacent to itself is not specified as the transfer destination of the received multicast packet, the multicast packet to an interface to a multicast communication device 1 specified as the destination.
    Type: Grant
    Filed: December 24, 2019
    Date of Patent: May 14, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Ryuma Senoo, Shigemasa Kumagawa, Ken Takahashi
  • Patent number: 11985008
    Abstract: [Problem] To reduce a setting burden on a media path in a media gateway. [Solution] A MG (1) includes a first interface for connecting to a first network among a plurality of communication networks, a second interface for connecting to a second network among a plurality of communication networks, and a test command issuing unit (13) configured to establish, when a mapping between the first interface and the second interface is set by first setting data for associating a media path ID in the first interface with a termination ID in the first interface and second setting data for associating a media path ID in the second interface with a termination ID in the second interface, a test call for a media path passing through the first interface and the second interface based on the mapping and test, by assigning a resource to the media path that is established, whether data transmission and reception are possible on the media path that is established.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: May 14, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Kosuke Watanabe, Shintaro Tanaka
  • Patent number: 11985151
    Abstract: A generation device includes a memory, and processing circuitry coupled to the memory and configured to sense anomaly of a network based on information having a plurality of items related to communication in the network, identify a cause of anomaly corresponding to each piece of the information when anomaly is sensed, and generate, based on values of the items in the information and the cause of anomaly identified, a cause-of-anomaly pattern for each predetermined set of pieces of the information.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takeshi Nakatsuru, Tomoyasu Sato, Takuya Minami, Naoto Fujiki, Masami Izumi
  • Patent number: 11983891
    Abstract: A moving target tracking device includes a position information creation unit that creates camera position information indicating adjacency relationships of a plurality of reference cameras and a plurality of pivoting cameras, a tracking target analysis unit that detects traveling information indicating a speed and a traveling direction of a moving target, a tracking score calculation unit that calculates a tracking score indicating a proportion at which the moving target has been able to be captured in the entire tracking section, a machine learning unit that creates, as record information, a control result obtained by a learning device that has learned a control value of each pivoting device corresponding to the traveling information such that the tracking score becomes higher, and a control information creation unit that creates control information by using the control value acquired with reference to the record information.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: May 14, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Hikotoshi Nakazato, Kenji Abe
  • Patent number: 11983487
    Abstract: A document creation assistance apparatus includes a tree structure generation unit configured to analyze a learning document for system development and generate a tree structure representing separate sections of the learning document, a frequency calculation unit configured to calculate, per leaf node of the tree structure, a frequency vector of a word that appears, a question extraction unit configured to extract, according to the frequency vector, a word about which a user is to be questioned, a question presentation unit configured to present a question about the extracted word to the user and receive an answer, and a document generation unit configured to generate a document with the extracted word and the answer set in a section of the separate sections of the leaf node according to the separate sections of the tree structure.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: May 14, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Takaaki Moriya, Manabu Nishio, Taizo Yamamoto, Takashi Utahara
  • Patent number: 11985650
    Abstract: A wireless LAN system in which a BSS composed of one wireless LAN base station and a plurality of wireless LAN terminals belonging to the wireless LAN base station, is set as a unit, and a plurality of the BSSs using an identical channel respectively perform uplink multi-user transmission, includes a radio control apparatus that is connected to the wireless LAN base station of each of the plurality of the BSSs and a wireless LAN terminal of the plurality of wireless LAN terminals of each of the plurality of the BSSs, and configured to collect radio information indicating interference states of respective radio waves, group sets of BSSs of the plurality of the BSSs, which are outside of radio wave reachable ranges of each other, as one of a plurality of groups among the plurality of the BSSs using the identical channel according to the radio information, and perform control to shift a timing of channel access for performing uplink multi-user transmission between the plurality of groups.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shota Nakayama, Kenichi Kawamura, Yasushi Takatori, Keisuke Wakao
  • Patent number: 11984930
    Abstract: A communication device in a communication system in which functions that are converted to software are configured as a plurality of components, and the functions are realized as a result of the components being respectively executed by a plurality of communication devices that are connected to a network, the communication device including a platform for each component that realizes a function corresponding to a plurality of the networks, wherein the platform includes a common processing unit configured to execute processing that is not dependent on the network and a dependent processing unit for each network, the dependent processing unit being configured to execute processing that is dependent on the network.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tomoya Hatano, Manabu Yoshino
  • Patent number: 11984925
    Abstract: 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.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kei Kitamura, Fumikazu Inuzuka, Kengo Shintaku, Takafumi Tanaka, Takuya Oda
  • Patent number: 11985533
    Abstract: There are provided a plurality of radio devices detecting an interference source signal transmitted by an interference source and generating pieces of air time information showing whether the interference source signal exists or not for each predetermined time unit; and an aggregation device estimating air time of the interference source by acquiring the pieces of air time information from the plurality of radio devices and aggregating/integrating the acquired pieces of air time information for each predetermined unit time, matching timings.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: May 14, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Junichi Iwatani, Hiroyuki Nakamura, Tomoaki Ogawa, Makoto Umeuchi, Shinya Otsuki, Hiroshi Sakamoto, Masayoshi Nabeshima
  • Patent number: 11983855
    Abstract: An image processing apparatus includes a change detection unit configured to detect phase changes in multiple predetermined directions from among phase changes in a luminance image in units of mutually different resolutions, and a reliability estimation unit configured to estimate reliability of the detected phase change based on temporal amplitude change information in the multiple directions determined in the luminance image. The reliability estimation unit may estimate the reliability using an amplitude change of multiple resolutions and using a value of an amplitude change equal to or greater than a predetermined threshold value among images having multiple resolutions. The reliability may become a greater value as the amplitude change becomes larger.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shoichiro Takeda, Kazuki Okami, Megumi Isogai, Hideaki Kimata
  • Patent number: 11985250
    Abstract: A key exchange technique of performing a key exchange among N (?2) parties, which can conceal metadata on communication, is provided. A key exchange method includes: a first key generation step in which a communication device Ui generates a first key; a first anonymous broadcast step in which the communication device Ui anonymously broadcasts the first key with a set R?{Ui} being designated for i?{1, . . . , n} and the communication device Ui anonymously broadcasts the first key with ? being designated for i?{n+1, . . . , N}; a second key generation step in which the communication device Ui generates a second key; a second anonymous broadcast step in which the communication device Ui anonymously broadcasts the second key with the set R?{Ui} being designated for i?{1, . . . , n} and the communication device Ui anonymously broadcasts the second key with ? being designated for i?{n+1, . . . , N}; and a session key generation step in which the communication device Ui generates a session key SK for i?{1, . . .
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Reo Yoshida, Tetsutaro Kobayashi, Yuto Kawahara, Hitoshi Fuji, Kazuki Yoneyama
  • Patent number: 11982884
    Abstract: There is provided an optical signal processing device that generates a mask function in an optical domain to enable high-speed RC processing. For light emitted from a laser light source, an optical modulator modulates at a modulation period at least one of the intensity and phase values of the optical electric field. Thereby, the light emitted from the laser light source becomes an input signal. The input signal is entered into an optical FIR filter unit. For the input signal, the term corresponding to the mask function is multiplied at the optical FIR filter unit and weighted. Thereby, the input signal is converted into an input signal modulated. The modulated input signal enters via an optical coupler, an optical circulation circuit which is loaded with a variable attenuator and a nonlinear response element. The circulating optical signal is branched into two by an optical coupler. One branched light is converted into an intermediate signal at an optical receiver.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Mitsumasa Nakajima, Toshikazu Hashimoto
  • Patent number: 11985457
    Abstract: A communication device in a communication system in which functions that are converted to software are configured as a plurality of components, and the functions are realized as a result of the components being respectively executed by a plurality of communication devices that are connected to a network, the communication device including a capsulation function unit configured to encapsulate information that is to be transmitted to another communication device.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tomoya Hatano, Manabu Yoshino
  • Patent number: 11985529
    Abstract: A plurality of access points configured to communicate with a subordinate wireless LAN terminal, an information collecting device configured to collect a frame respectively transmitted and received between the plurality of access points and the wireless LAN terminal, and extract information on communication quality of an access point of the plurality of access points from a header of the frame, and an information collecting server configured to acquire the information on the communication quality of the access point from the information collecting device, analyze the information to determine whether the communication quality is good or bad for each of the plurality of access points, and execute processing of externally displaying or notifying a result that is determined are included.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: May 14, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Masayoshi Nabeshima, Hiroyuki Nakamura, Tomoaki Ogawa, Shinya Otsuki, Makoto Umeuchi, Junichi Iwatani, Hiroshi Sakamoto
  • Patent number: 11982542
    Abstract: A first calculation unit synthesizes respective measured values of acceleration of an X-axis, a Y-axis and a Z-axis measured by a measurement unit and calculates the synthesized acceleration. A second calculation unit calculates acceleration in a body axis direction (vertical direction) of a wearer wearing the measurement unit from the respective measured values of acceleration of the X-axis, the Y-axis and the Z-axis. The third calculation unit calculates amplitude of a time variation of acceleration in the body axis direction calculated by the second calculation unit. A reference setting unit sets a reference time for determining one step based on the amplitude calculated by the third calculation unit. A walking detection unit detects one-step walking motion of the wearer, a one-step time of which falls within a range of the reference time based on the synthesized acceleration.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: May 14, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventor: Yuki Hashimoto
  • Patent number: 11985034
    Abstract: A management device comprises an extracting means that extracts, from a database storing configuration information, the client terminals belonging to a specified group, network devices directly serving the client terminals, network devices between the serving network devices, and MEC devices to be treated as candidates for selection, and a selecting means that selects the MEC device to be accessed by the plurality of client terminals forming the group by using first and second amounts of latency, the first amount of latency being the amount of latency between each network device directly serving the client terminals belonging to the group and each MEC device, and the second amount of latency being the amount of latency between each network device directly serving the client terminals belonging to the group and each client terminal.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: May 14, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Takuya Sato, Tomohiro Okada, Takayuki Nakamura, Shunsuke Homma, Mitsuo Amasaka