Patents Assigned to Nippon Telegraph and Telephone Corporation
  • Patent number: 11991545
    Abstract: An arrival rate estimation device includes an average received power calculation unit that calculates an average received power for each mesh that constitutes an area, with respect to each of a plurality of base stations and each of a plurality of antennas included in each of the base stations and an arrival rate estimation unit that calculates a communication arrival rate by substituting the average received power into a cumulative distribution function of an instantaneous received power value, and based on the calculated communication arrival rate, calculates a communication arrival rate while giving consideration to a site diversity effect and an antenna diversity effect, the cumulative distribution function being obtained from a probability density function of an amplitude that instantaneously changes due to Rayleigh fading.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: May 21, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kazumitsu Sakamoto, Kenji Suzuki, Yohei Katayama, Yosuke Fujino, Hiroyuki Fukumoto
  • Patent number: 11991063
    Abstract: An abnormality detection device according to the present invention is a video transmission state abnormality detection device connected via a network to a plurality of video transmission devices, an IP packet transfer device on the transmission side, an IP packet transfer device on the reception side, and a plurality of video reception devices. The video transmission state abnormality detection device prepares a transmission/reception IP flow table by aggregating IP flow information for the devices, detects an abnormality in transmission on the basis of the transmission/reception IP flow table, and specifies the location of the abnormality. The abnormality detection device according to the present invention can automatically detect the amount of traffic and specify which part of a transmission path an abnormality is caused on, without the need for advance setting. Therefore, video or sound traffic can be monitored efficiently.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: May 21, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yasuhiro Mochida, Takahiro Yamaguchi
  • Patent number: 11989929
    Abstract: An object is to make it possible to train an image recognizer by efficiently using training data that does not include label information. A determination unit 180 causes repeated execution of the followings.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: May 21, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kazuhiko Murasaki, Shingo Ando, Atsushi Sagata
  • Patent number: 11991546
    Abstract: A radio base station device includes a plurality of radio units that perform communication with a radio terminal device, a packet data collection unit that collects packet data communicated by the plurality of radio units on the basis of a packet collection policy, a collected packet data analysis unit that performs analysis on packet data on the basis of a packet analysis policy, and transmits analysis result information to the control station device, and an information processing unit that transmits base station performance information and analysis result information to the control station device, and receives a packet collection policy and a packet analysis policy.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: May 21, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Toshiro Nakahira, Tomoki Murakami, Hirantha Abeysekera, Koichi Ishihara, Takafumi Hayashi, Yasushi Takatori
  • Patent number: 11991519
    Abstract: A communication method performed by a communication system including an authentication device and a subscriber line system includes: determining by the authentication device, in response to a request for communicative connection from a user terminal that establishes a communicative connection via the subscriber line system, whether the user terminal is allowed to establish the communicative connection; and controlling, by the subscriber line system, the communicative connection established by the user terminal, by dynamically allocating a bandwidth in accordance with a request from the user terminal based on a result of the determining.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: May 21, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takahito Kirihara, Satoshi Narikawa, Satoshi Ikeda
  • Patent number: 11990136
    Abstract: It is intended to acquire a highly accurate speech recognition result for a subject of a conversation, while inhibiting an increase in the amount of calculation. A speech recognition device (10) according to the present invention includes a first speech recognition unit (11) that performs speech recognition processing using a first method on speech data of a conversation made by a plurality of speakers and outputs a speech recognition result for each of respective uttered speech segments of the plurality of speakers, a determination unit (13) that determines a subject segment based on a result of the speech recognition processing by the first speech recognition unit 11, and a second speech recognition unit (14) that performs speech recognition processing using a second method higher in accuracy than the first method on the speech data in the segment determined to be the subject segment and outputs a speech recognition result as a subject text.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: May 21, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tetsuo Amakasu, Kaname Kasahara, Takafumi Hikichi, Masayuki Sugizaki
  • Patent number: 11988873
    Abstract: An end portion structure of a transmission line of the present invention is a structure in which a protective film with a thickness of 0.5 ?m to 3.0 ?m is formed on the end surface of the transmission line in place of an end cap formed in an end portion of a transmission line in the related art, and no adhesive is used in a portion through which light passes. The protective film on the end surface works to suppress a bulge of the core. The thickness of the protective film is significantly thinner than the end cap, and thus waveguides facing each other can be brought close to each other. It is possible to reduce the connection loss between two fibers or waveguides facing each other to be 0.5 dB or less. Since no adhesive is used, there is no loss increase caused by adhesive deterioration.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: May 21, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Katsuhiko Hirabayashi, Satomi Katayose, Yuji Fujiwara, Ryoichi Kasahara
  • Patent number: 11986957
    Abstract: Provided is a control technique that enables a time required for platoon control operations to be shortened. A mobile robot includes, for example, a position distance calculation instruction transmission unit 1, a position distance calculation instruction transfer unit 2, a reply position distance calculation instruction transmission unit 3, a direction storage unit 4, a reply position distance calculation instruction transfer unit 5, an operation clock time announcement instruction transmission unit 6, an operation clock time announcement instruction transfer unit 7, a first moving unit 8, a movement start instruction transmission unit 9, a movement start instruction transfer unit 10, a second moving unit 11, a third moving unit 12, a determination unit 13, a fourth moving unit 14, a fifth moving unit 15, a waiting instruction transmission unit 16, and a waiting instruction transfer unit 17.
    Type: Grant
    Filed: August 8, 2019
    Date of Patent: May 21, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventor: Hiroshi Kawano
  • Patent number: 11989292
    Abstract: An analysis function imparting device according to the present invention includes processing circuitry configured to execute a script engine while monitoring the script engine to acquire an execution trace including an application programming interface (API) trace and a branch trace, analyze the execution trace, and detect a hook point that is a location to which a hook is applied and a code for analysis is inserted, detect, based on monitoring at the hook point, a tap point that is a memory monitoring location at which the code for analysis outputs a log, and apply a hook to the script engine to impart an analysis function to the script engine based on the hook point and the tap point.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: May 21, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Toshinori Usui, Yuto Otsuki, Makoto Iwamura, Yuhei Kawakoya, Jun Miyoshi
  • Patent number: 11989976
    Abstract: A nonverbal information generation apparatus includes a nonverbal information generation unit that generates time-information-stamped nonverbal information that corresponds to time-information-stamped text feature quantities on the basis of the time-information-stamped text feature quantities and a learned nonverbal information generation model. The time-information-stamped text feature quantities are configured to include feature quantities that have been extracted from text and time information representing times assigned to predetermined units of the text. The nonverbal information is information for controlling an expression unit that expresses behavior that corresponds to the text.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: May 21, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryo Ishii, Ryuichiro Higashinaka, Taichi Katayama, Junji Tomita, Nozomi Kobayashi, Kyosuke Nishida
  • Patent number: 11991038
    Abstract: In a failure location identification apparatus according to one embodiment, a facility information management unit records therein facility information including positional information of a physical resource, an external factor information management unit records therein external factor information concerning an external factor that possibly becomes a factor that causes a failure in the physical resource, the external factor information including positional information of the external factor, and a facility influence definition management unit records therein information concerning a possible influence of the external factor on the physical resource.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: May 21, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Fumika Asai, Shunsuke Kanai, Satoshi Suzuki, Haruhisa Nozue, Kazuaki Akashi, Naomi Murata
  • Publication number: 20240162991
    Abstract: An optical transmission device includes: a first optical phase modulator that outputs a first optical signal by phase-modulating the laser beam having a first oscillation frequency according to the first electric signal in a case where the first electric signal is output to the first transmission path, a second optical phase modulator that outputs a laser beam having a second oscillation frequency as the second optical signal in a case where the first electric signal is output to the first transmission path; an optical multiplexer/distributor that outputs a third optical signal and a fourth optical signal by multiplexing the first optical signal and the second optical signal and distributing a result of the multiplexing; a first detection unit that converts the third optical signal into a first heterodyne detection signal; a second detection unit that converts the fourth optical signal into a second heterodyne detection signal; and a first optical intensity modulator that intensity-modulates a laser beam havi
    Type: Application
    Filed: April 1, 2021
    Publication date: May 16, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryo MIYATAKE, Yoichi FUKADA, Toshiaki SHITABA, Akihiro TANABE, Tomoaki YOSHIDA
  • Publication number: 20240163245
    Abstract: In order to solve the above problem, an object of the present invention is to provide a network system, a control method, a database, a controller, and a program capable of path construction in a device IF direct access network without disclosing connection information. A network system according to the present invention (1) specifies and records a location on a network of a user and a device used by the user by using exchange of authentication data using a media signal of the device, and (2) when the user makes a connection request to content by using a user name, a controller solves location information on the network by using the user name, controls the network, and realizes connection between the content and the device.
    Type: Application
    Filed: April 8, 2021
    Publication date: May 16, 2024
    Applicants: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tatsuya FUKUI, Toshihito FUJIWARA, Ryota SHIINA, Tomohiko IKEDA, Hiroya ONO
  • Publication number: 20240157003
    Abstract: An object of the present invention is to provide an ultraviolet light irradiation system and an ultraviolet light irradiation method which can perceive a state of a region where ultraviolet light is irradiated to output/block the ultraviolet light. An ultraviolet light irradiation system 301 according to the present invention includes an ultraviolet light source unit 11 that produces ultraviolet light, an N (N is a natural number) irradiation unit 13 that irradiates an irradiation target region Ar with the ultraviolet light, a sensor unit 31 that detects whether or not an object that should avoid exposure is present in the irradiation target region Ar, and a blocking unit 30 that stops, in a case where the object that should avoid exposure is present in the irradiation target region Ar, irradiation of the ultraviolet light from the irradiation unit 13 to the irradiation target region Ar.
    Type: Application
    Filed: April 5, 2021
    Publication date: May 16, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ayako IWAKI, Takahito KIRIHARA, Tomohiro TANIGUCHI, Satoshi NARIKAWA, Kazuhide NAKAJIMA, Takashi MATSUI, Nobutomo HANZAWA, Yuto SAGAE, Chisato FUKAI
  • Publication number: 20240161384
    Abstract: An information processing system includes: a first ray tracing unit configured to determine a two-dimensional ray trace from a transmission point at which a radio wave is transmitted, to a reception point at which the radio wave is received; a second ray tracing unit configured to determine a three-dimensional ray trace corresponding to the two-dimensional ray trace, using height information about the transmission point and the reception point; and a radio field intensity calculation unit that calculates the intensity of the radio wave at the reception point, using one or more three-dimensional ray traces determined by the second ray tracing unit.
    Type: Application
    Filed: April 5, 2021
    Publication date: May 16, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Minoru INOMATA, Wataru YAMADA, Nobuaki KUNO, Motoharu SASAKI
  • Publication number: 20240162982
    Abstract: According to an embodiment, an optical space communication device includes: an optical antenna configured to receive laser light emitted by multiplexing a main signal to be communicated and a control signal used to maintain or control the communication; an optical branching element configured to branch the laser light received by the optical antenna into first laser light and second laser light; a main signal extraction unit configured to extract the main signal based on the first laser light; a positional deviation detection unit configured to detect a positional deviation of the laser light based on the second laser light; and a control signal extraction unit configured to extract the control signal based on the second laser light.
    Type: Application
    Filed: April 2, 2021
    Publication date: May 16, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takeshi IMAI, Naotaka SHIBATA, Shin KANEKO, Rintaro HARADA
  • Patent number: 11983246
    Abstract: The present invention provides a data analysis system capable of performing analysis appropriately using a CNN model while reducing communication traffic. A data analysis system 90 includes: an instrument 10 that performs a conversion process of outputting compression data obtained as a result of processing observation data received via an input layer of a learned neural network 18A using portions ranging from the input layer to a predetermined intermediate layer; and a device 20 that performs an analysis process of inputting the compression data to a subsequent intermediate layer in a learned neural network 18B, inputting data obtained by decoding the compression data, which is an output of the subsequent intermediate layer, to an output layer configured using a CNN model, and obtaining an analysis result of the observation data as an output of the output layer.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yuki Kurauchi, Naoto Abe, Hiroshi Konishi, Hitoshi Seshimo
  • Patent number: 11982837
    Abstract: An object is to improve crosstalk between ports while keeping an interposer circuit small. In an interposer circuit that includes a first surface connected to an optical circuit, a second surface that is connected to a fiber block and is located opposite to the first surface in parallel with the first surface, and a plurality of connection waveguides connected to a plurality of input/output waveguides included in the optical circuit and a plurality of input/output fibers included in the fiber block, the connection waveguides each have a straight shape, and an angle (?) formed between the first surface and each of the connection waveguides is the same as an angle (?) formed between the second surface and each of the connection waveguides.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yuichiro Ikuma, Yusuke Nasu, Manabu Oguma, Takashi Yamada
  • Patent number: 11983495
    Abstract: An evaluation device includes a first calculation unit configured to calculate feature quantities of respective words, the feature quantities corresponding to text data in which a target of any goal of the SDGs is described and text data in which an outline of one or more first services for which a contribution to the goal that is clear is described, a generation unit configured to generate a sentence feature matrix based on the feature quantities of the respective words, a second calculation unit configured to calculate, when text data in which an outline of a second service is described is input, feature quantities of respective words, and an evaluation unit configured to evaluate a degree of a contribution of the second service to the goal based on the feature quantities of the respective words relevant to the second service and the sentence feature matrix.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: May 14, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Takashi Furutani, Machiko Shinozuka, Xiaoxi Zhang, Hiroki Oka, Katsuya Hayashi, Yuriko Tanaka
  • Patent number: 11982839
    Abstract: To provide an optical 90-degree hybrid formed of a silicon waveguide capable of suppressing an optical loss and a phase error, and facilitating electronic packaging and optical packaging. In the optical 90-degree hybrid circuit including two optical branching units facing each other and two optical coupling units facing away from each other, four arm waveguides are arranged including bent waveguides each of which guides an output light of the optical branching unit to the optical coupling unit, and is formed in a curved shape.
    Type: Grant
    Filed: April 16, 2020
    Date of Patent: May 14, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Makoto Jizodo, Manabu Oguma, Yusuke Nasu, Yuichiro Ikuma