Patents Assigned to Nippon Telegraph & Telephone Corporation
  • Publication number: 20210141858
    Abstract: It is possible to accurately predict data for a prediction target time. The operation unit 10 receives high-dimensional array data representing data at each time and external information data that is a tensor or matrix representing external information at each time. The parameter estimation unit 16 decomposes the high-dimensional array data into a weighted sum of products of a plurality of factor matrices for each rank and decomposes the external information data into a weighted sum of products of a plurality of factor matrices for each rank, under a sparse constraint of weighting parameters for each rank. The prediction unit 22 predicts the data for a prediction target time based on the weighting parameters for each rank and the plurality of factor matrices for each rank, obtained for the high-dimensional array data.
    Type: Application
    Filed: March 20, 2019
    Publication date: May 13, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Maya OKAWA, Hiroyuki TODA, Takeshi KURASHIMA
  • Publication number: 20210141751
    Abstract: A packet processing apparatus includes a line adapter configured to receive packets from a communication line, a packet combining unit configured to generate a combined packet by combining a plurality of packets received from the communication line, a packet memory configured to store packets received from the communication line, and a combined packet transferring unit configured to DMA transfer the combined packet generated by the packet combining unit to the packet memory. The combined packet transferring unit determines an address of start data of each packet inside the combined packet on the packet memory, writes information on the address into the descriptor that is a predetermined data area on a memory, and DMA transfers the combined packet to the packet memory.
    Type: Application
    Filed: May 13, 2019
    Publication date: May 13, 2021
    Applicant: Nippon Telegraph and Telephone Corporation
    Inventors: Tomoaki Kawamura, Saki Hatta, Shoko Oteru, Koji Yamazaki, Takahiro Hatano
  • Publication number: 20210140670
    Abstract: Provided is a highly reliable technology for optimizing an action for controlling an environment in a target space.
    Type: Application
    Filed: July 16, 2019
    Publication date: May 13, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Nobuhiko MATSUURA, Midori KODAMA, Takahiro HATA, Motonori NAKAMURA, Ippei SHAKE
  • Patent number: 11002928
    Abstract: An optical fiber cable includes: a core comprising gathered optical fibers; an inner sheath housing the core; a wire body embedded in the inner sheath; tension members embedded in the inner sheath, wherein the core is interposed between the tension members; a reinforcing sheet that covers the inner sheath; and an outer sheath that covers the reinforcing sheet, wherein in the inner sheath, ti<Ti and to<To are satisfied, where a thickness of a radially inner portion between the core and the wire body is ti, a thickness of a radially inner portion between the core and each of the tension members is Ti, a thickness of a radially outer portion between the wire body and the reinforcing sheet is to, a thickness of a radially outer portion between each of the tension members and the reinforcing sheet is To.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: May 11, 2021
    Assignees: Fujikura Ltd., NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Mizuki Isaji, Masatoshi Ohno, Shinnosuke Sato, Kouji Tomikawa, Akira Namazue, Ken Osato, Naoki Nakagawa, Yuji Aoyagi, Shigekatsu Tetsutani
  • Patent number: 11005545
    Abstract: Included are n antenna sets; n antenna switch units; n signal change units each changing a combination of one or more of a phase, a timing, a frequency, and a power of each signal transmitted/received in n antennas being selected from the antenna sets; a notification unit outputting a notification signal, in which control information on the antenna switch units and the signal change units according to a target terminal being a destination/source of the signals transmitted/received in the n antennas, are arranged according to a switch time of each of the antenna switch units and a change time of each of the signal change units; and a control unit sequentially starting control of switching by each of the antenna switch units and control of changing by each of the signal change units in order in which the control information on the each unit in the notification signal is notified.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: May 11, 2021
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tomoki Murakami, Koichi Ishihara, Yasushi Takatori, Hirantha Abeysekera, Mamoru Akimoto, Masato Mizoguchi
  • Patent number: 11004239
    Abstract: A repetitive structure extraction device includes an image feature extraction unit which extracts an image feature for each of a plurality of images which are captured at one or a plurality of locations and which are given different capture times, a temporal feature extraction unit which extracts, for each of the plurality of images, a temporal feature according to a predetermined period from a capture time given to the image, and a repetitive structure extraction unit which learns, on the basis of the image feature extracted for each of the plurality of images by the image feature extraction unit and the temporal feature extracted for each of the plurality of images by the temporal feature extraction unit, a repetitive structure which is used to perform interconversion between the temporal feature and a component of the image feature and which is provided according to a correlation of periodic change between the component of the image feature and the temporal feature.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: May 11, 2021
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Akisato Kimura, Yoshitaka Ushiku, Kunio Kashino
  • Publication number: 20210132314
    Abstract: An intermittent tape core wire (140) of an optical fiber cable is assembled into a cable core so that in a k core wire, an l core wire, and an m core wire composed of a multi-core optical fibers continuously adjacent in the width direction of the intermittent tape core wire (140), a difference ? between a core wire twisting direction D2km of the k core wire at a bonding portion (142) connecting the k core wire and the l core wire and a core wire twisting direction D2kl of the k core wire at a bonding portion (142) connecting the k core wire and the m core wire is different from when manufactured.
    Type: Application
    Filed: July 2, 2019
    Publication date: May 6, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masashi KIKUCHI, Yusuke YAMADA, Hisashi IZUMITA, Junichi KAWATAKA, Kazunori KATAYAMA
  • Publication number: 20210134005
    Abstract: A control device mounted in a first mobile body that includes a camera and an antenna includes: the camera configured to operate such that a direction of an optical axis of the camera and an oriented direction of the antenna are linked to each other; an identification unit configured to identify a second mobile body through image recognition from a captured image captured by the camera operating; and an antenna control unit configured to control the oriented direction of the antenna such that a position of the identified second mobile body in the captured image is a predetermined position.
    Type: Application
    Filed: June 5, 2019
    Publication date: May 6, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kohei SUZAKI, Yusuke ASAI, Hiroyuki SHIBA
  • Publication number: 20210135849
    Abstract: A share generating device obtains N seeds s0, . . . , sN?1, obtains a function value y=g(x, e) ? Fm of plaintext x ? Fm and a function value e, and obtains information containing a member yi and N?1 seeds sd, where d ? {0, . . . , N?1} and d?i, as a share SSi of the plaintext x in secret sharing and outputs the share SSi. It is to be noted that the function value y is expressed by members y0 ? Fm(0), . . . , yN?1 ? Fm(N?1), which satisfy m=m(0)+ . . . +m(N?1).
    Type: Application
    Filed: August 16, 2018
    Publication date: May 6, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Dai IKARASHI, Ryo KIKUCHI, Koji CHIDA
  • Publication number: 20210135945
    Abstract: An object of the present disclosure is to provide a network device and a method for setting the network device that can, in developing functional modules, perform abnormality detection based on statistical information and setting verification in consideration of a dependency relationship between the functional modules and statistical information and can address a change in a policy in the setting verification and a change in a condition in the abnormality detection. In the network device according to the present disclosure, an existing setting of each module, external information, a dependency relationship, and a policy are collected at one location (setting verification unit) by using a common language. When a new setting is made to the modules, a new dependency relationship is set, or new external information is acquired, the new setting is sent to the setting verification unit and checked against the existing setting, the external information, and the dependency relationship.
    Type: Application
    Filed: June 21, 2019
    Publication date: May 6, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tomoya HIBI, Hitoshi MASUTANI, Hirokazu TAKAHASHI, Junki ICHIKAWA, Toru MANO
  • Publication number: 20210124113
    Abstract: An optical fiber cable 100 includes at least one optical fiber core 140 and a sheath containing the optical fiber core. The optical fiber core 140 includes optical fibers 130. A total length of the optical fiber core 140 is longer than that of the sheath 160. The optical fiber core 140 is contained in the sheath 160 so that bending occurs in the optical fibers 130.
    Type: Application
    Filed: June 20, 2019
    Publication date: April 29, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yusuke YAMADA, Masashi KIKUCHI, Hisashi IZUMITA, Junichi KAWATAKA, Kazunori KATAYAMA
  • Publication number: 20210124870
    Abstract: A paragraph divider (15a) divides text to which markup information representing vertices of a graph structure has been assigned into paragraphs, a vertex extractor (15b) extracts vertices for each paragraph, and an edge extractor (15c) extracts an edge between the extracted vertices for each paragraph. A storage unit (14) may store a schema (14a) for specifying edges between attributes of vertices of a graph structure, the paragraph divider (15a) may divide text to which markup information representing vertices of a graph structure and attributes of the vertices has been assigned into paragraphs, the vertex extractor (15b) may extract the vertices and the attributes of the vertices for each paragraph, and the side extractor (15c) may extract edges specified in the schema (14a) for each paragraph. A vertex combiner (15d) may combine vertices redundantly extracted between paragraphs.
    Type: Application
    Filed: July 4, 2019
    Publication date: April 29, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Mayo YAMASAKI, Hideki KAWABE
  • Publication number: 20210126724
    Abstract: The interference power estimation apparatus 1 calculates an inter-station vector from an interfering station over a sphere to an interfered station installed in the sphere based on a position of each station. In a case where a line segment connecting the position of the interfered station and the position of the interfering station does not intersect with the sphere, an angle between an antenna direction vector representing a direction of an antenna from the position of the interfered station and the inter-station vector is derived, and a sum of an antenna directivity attenuation amount obtained based on the angle and propagation losses calculated based on a distance between the interfered station and the interfering station is calculated.
    Type: Application
    Filed: March 7, 2019
    Publication date: April 29, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kota ITO, Hideyuki TSUBOI, Yutaka IMAIZUMI, Yushi SHIRATO, Naoki KITA
  • Publication number: 20210125516
    Abstract: A question that can be answered with polarity can be accurately answered with polarity. A machine comprehension unit 210 estimates the start and the end of a range serving as a basis for an answer to the question in text by using a reading comprehension model trained in advance to estimate the range based on the inputted text and question. A determination unit 220 determines the polarity of the answer to the question by using a determination model trained in advance to determine whether the polarity of the answer to the question is positive or not based on information obtained by the processing of the machine comprehension unit 210.
    Type: Application
    Filed: June 14, 2019
    Publication date: April 29, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kosuke NISHIDA, Kyosuke NISHIDA, Atsushi OTSUKA, Itsumi SAITO, Hisako ASANO, Junji TOMITA
  • Publication number: 20210126906
    Abstract: A communication device includes a signature encryption unit that encrypts input information with a secret key and transmits the information to a server device if the communication device belongs to a group, and a signature decryption unit that downloads, from the server device, encrypted n?1 pieces of the input information transmitted from other communication devices and decrypts the encrypted n?1 pieces of input information with the secret key if the communication device belongs to a group. The communication device transmits session key generation information to the server device via the signature encryption unit, generates a session key using n?1 pieces of session key generation information acquired via the signature decryption unit and session key generation information of the communication device, transmits a cipher text encrypted with the session key via the signature encryption unit to the server device, and decrypts n?1 cipher texts acquired via the signature decryption unit with the session key.
    Type: Application
    Filed: January 16, 2019
    Publication date: April 29, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tetsutaro KOBAYASHI, Yuto KAWAHARA, Hitoshi FUJI, Reo YOSHIDA, Kazuki YONEYAMA
  • Publication number: 20210125446
    Abstract: In a voting system including a vote broadcasting server and a plurality of client terminals, the vote broadcasting server generates a plurality of pieces of vote information that is data in which secret information is shared and transmits the vote information to each client terminal, each client terminal generates voting information by encrypting vote information such that the vote information can be decrypted when predetermined conditions are satisfied and transmits the voting information to the vote broadcasting server, the vote broadcasting server transmits a voting information group composed of voting information received from respective client terminals to the respective client terminals, and each client terminal ascertains a vote result according to the number of pieces of vote information decrypted from the voting information group and executes processing based on the vote result.
    Type: Application
    Filed: May 28, 2019
    Publication date: April 29, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Koha KINJO, Tetsuya OKUDA, Ryo KIKUCHI
  • Publication number: 20210124121
    Abstract: An object is to provide a highly versatile optical fiber local-light detection apparatus capable of supporting various types of coated optical fibers.
    Type: Application
    Filed: June 26, 2019
    Publication date: April 29, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takui UEMATSU, Hidenobu HIROTA, Hiroyuki IIDA, Tetsuya MANABE
  • Publication number: 20210125305
    Abstract: A video of a shadow is automatically generated to create an illusion that a region included in a real object floats above a background and an apparent height of the region with respect to a background region changes with time. A video generation device receives input of a dark region image including a dark region that is a spatial region corresponding to a target object and is darker than a background, and control information for specifying a motion to be given to the dark region, and obtains and outputs a video including a shadow region is obtained and output. The shadow region is obtained by performing mask processing on a motion region obtained by giving the motion to the dark region according to the control information. The mask processing replaces pixels of a mask region at a spatial position corresponding to the target object with pixels brighter than the motion region.
    Type: Application
    Filed: April 2, 2019
    Publication date: April 29, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventor: Takahiro KAWABE
  • Publication number: 20210126707
    Abstract: A communication system transmits relay data through a communication path including a plurality of sections in which different communication schemes are used. A relay communication device is provided between a first section and a second section which are adjacent sections. The relay communication device includes a receiving unit receiving the relay data from the first section through a frame of a first communication scheme, and a relaying unit configuring, in a frame of a second communication scheme used to transmit the relay data to a relay destination, signal quality information representing signal quality calculated for a physical link in each of the sections through which the relay data is transmitted before arriving at the relay communication device, and outputting the frame of the second communication scheme to the second section.
    Type: Application
    Filed: June 5, 2019
    Publication date: April 29, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takafumi TANAKA, Shokei KOBAYASHI, Seiki KUWABARA, Yoshiaki YAMADA
  • Patent number: 10992462
    Abstract: A concealed-decision-tree computation system includes a user apparatus and 0th to (n?1)-th server apparatuses, where n is a predetermined positive integer. The user apparatus secret-shares data D into n shares [D]j (j=0, . . . , n?1) and sends the n shares [D]j (j=0, . . . , n?1) to the 0th to (n?1)-th server apparatuses, respectively. The 0th to (n?1)-th server apparatuses use the n shares [D]j (j=0, n?1) to perform secret cooperation computation to obtain n shares [out]0, . . . , [out]n-1 of a value “out” corresponding to the data D in a predetermined decision tree and send the n shares [out]0, . . . , [out]n-1 to the user apparatus. The user apparatus uses at least k shares out of the n received shares [out]0, . . . , [out]n-1 to restore the value “out” corresponding to the data D in the predetermined decision tree, where k is a predetermined integer equal to or smaller than n.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: April 27, 2021
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryo Kikuchi, Koki Hamada