Patents by Inventor Shota NAKAYAMA
Shota NAKAYAMA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11955959Abstract: A parallel driving device that drives parallel-connected semiconductor elements includes a control unit and a gate driving circuit. The control unit detects a temperature difference between the semiconductor elements on the basis of detected values by temperature sensors that detect temperatures of the individual semiconductor elements. The control unit generates a control signal for changing the timing at which to turn on a first semiconductor element specified from the semiconductor elements on the basis of the temperature difference. The gate driving circuit generates a first driving signal for driving the semiconductor elements, and generates a second driving signal that is the first driving signal delayed on the basis of the control signal, and applies the second driving signal to the first semiconductor element.Type: GrantFiled: May 29, 2019Date of Patent: April 9, 2024Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yasushi Nakayama, Yoshiko Tamada, Takayoshi Miki, Shota Morisaki, Yukio Nakashima, Kenta Uchida, Keisuke Kimura, Tomonobu Mihara
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Publication number: 20240080677Abstract: A communication system including a control server device and a movable base station device includes: generating, by the control server device, one or more terminal clusters obtained by clustering terminal devices on the basis of information about a location and a material of each shielding object in an area and a location of each terminal device; calculating, by the control server device, a location of a movable base station device for each of the terminal clusters; and moving, by the control server device, the movable base station device to the calculated location in each of the terminal cluster.Type: ApplicationFiled: February 9, 2021Publication date: March 7, 2024Inventors: Shota NAKAYAMA, Daisuke MURAYAMA
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Patent number: 11917682Abstract: Provided is a wireless LAN system in which an interference control signal transmitter that is provided in the surroundings of the wireless LAN base station and the wireless LAN terminal, and is configured to collect wireless environment information regarding the interfering AP/STA, and transmit, to the interfering AP/STA, an interference control signal that is to be used to set a transmission waiting period; and an interference control signal management device configured to collect the wireless environment information from the interference control signal transmitter, determine the interference control signal transmitter whose communication area includes the interfering AP/STA based on the wireless environment information, and control the determined interference control signal transmitter to transmit the interference control signal to be used to set the transmission waiting period that corresponds to a length of time of the communication between the wireless LAN base station and the wireless LAN terminal, wherType: GrantFiled: November 8, 2019Date of Patent: February 27, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kenichi Kawamura, Yasushi Takatori, Tomoyuki Yamada, Hiroshi Nakamoto, Keisuke Wakao, Shota Nakayama
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Patent number: 11895693Abstract: In a random access radio communication system configured to perform downlink communication from a radio base station to radio terminals by random access, the radio terminals include one or more low latency terminals requiring low latency and one or more non-low latency terminals not requiring low latency, and the low latency terminals and the non-low latency terminals are configured to be distinguished by service set identifiers (SSIDs). The random access radio communication system includes terminal assignment destination control unit of distinguishing the low latency terminals and the non-low latency terminals in accordance with the SSIDs and evenly distributing the terminals into a plurality of communication channels, and random access control unit of performing priority control on the low latency terminals and the non-low latency terminals for each communication channel so that the downlink communication in the low latency terminal satisfies a predetermined delay time.Type: GrantFiled: January 6, 2020Date of Patent: February 6, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Tomoyuki Yamada, Keisuke Wakao, Kenichi Kawamura, Akira Kishida, Shota Nakayama, Yasushi Takatori, Takatsune Moriyama
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Publication number: 20240040458Abstract: The present disclosure provides a wireless communication system cooperation method appropriate for cooperation between a mobile communication system and a wireless LAN system involving priority control. In a communication area of 5G, a 5QI representing communication quality is allocated to a service data flow, and the communication of the service data flow is performed via a base station so that the communication quality is realized. A priority condition corresponding to 5QI is set for a communication time condition of the wireless LAN (step 100). When the wireless terminal UE to be protected is handed over to the wireless LAN (step 102), a priority condition set based on 5QI is instructed to the access point (step 106). Thereafter, the access point performs communication of the service data flow according to the priority condition.Type: ApplicationFiled: August 25, 2020Publication date: February 1, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shota NAKAYAMA, Daisuke MURAYAMA, Kenichi KAWAMURA, Takatsune MORIYAMA
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Publication number: 20240032086Abstract: A relay method is executed by a relay device that relays communication between each of terminals accommodated by wireless communication and an external device. The relay method includes setting, for each terminal of the terminals, a time period from storing a packet in a queue until transmitting the packet to the terminal as a first time period; and setting, for each terminal of the terminals, a time interval in which the terminal is allowed to transmit a packet by the wireless communication as a second time period corresponding to the first time period.Type: ApplicationFiled: August 27, 2020Publication date: January 25, 2024Inventors: Shota NAKAYAMA, Kenichi KAWAMURA, Daisuke MURAYAMA, Takatsune MORIYAMA
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Patent number: 11882479Abstract: A wireless LAN communication device generates an MPDU by attaching a MAC header to transmission data, generates an A-MPDU subframe by attaching an MPDU delimiter to the MPDU, generates an A-MPDU by aggregating a plurality of A-MPDU subframes, and transmits the A-MPDU. The wireless LAN communication device includes: an MPDU duplicating means for determining whether or not transmission data is a redundancy target according to a required quality of the transmission data, determining that an MPDU generated from the transmission data determined to be a redundancy target is a redundant MPDU, and generating a duplicate MPDU by duplicating the redundant MPDU; and an A-MPDU generating means for generating an A-MPDU that includes the redundant MPDU and the duplicate MPDU.Type: GrantFiled: November 8, 2019Date of Patent: January 23, 2024Assignee: Nippon Telegraph and Telephone CorporationInventors: Kenichi Kawamura, Yasushi Takatori, Hiroshi Nakamoto, Tomoyuki Yamada, Keisuke Wakao, Shota Nakayama
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Publication number: 20230399054Abstract: A side sill that is disposed in a lower part and on an outer side in a vehicle width direction of a vehicle and has a side sill inner and a side sill outer which collaborate with each other to form a closed cross section extending in a front-rear direction of the vehicle; a wheel that is located ahead of the side sill outer; an outer-side reinforcement member that has a shape extending along a front face part and a side face part in a front end part of the side sill outer and is joined to the front end part from inside the closed cross section; and an inner-side reinforcement member that diagonally couples a front face part and a side face part in a front end part of the side sill inner to each other.Type: ApplicationFiled: March 23, 2023Publication date: December 14, 2023Applicant: Mazda Motor CorporationInventors: Ippei KURODA, Masaya NISHIMOTO, Shota NAKAYAMA
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Publication number: 20230328595Abstract: The present disclosure provides a wireless communication system cooperation method appropriate for cooperation between a mobile communication system and a wireless LAN system involving priority control. In a communication area of 5G, a 5QI representing communication quality is allocated to a service data flow, and the communication of the service data flow is performed via a base station so that the communication quality is realized. A priority condition corresponding to 5QI is set for a frequency resource of the wireless LAN (step 100). When the wireless terminal UE to be protected is handed over to the wireless LAN (step 102), a priority condition set based on 5QI is instructed to the access point (step 106). Thereafter, the access point performs communication of the service data flow according to the priority condition.Type: ApplicationFiled: August 25, 2020Publication date: October 12, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shota NAKAYAMA, Daisuke MURAYAMA, Kenichi KAWAMURA, Takatsune MORIYAMA
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Publication number: 20230308893Abstract: A control system includes a base station and a control apparatus for controlling the base station. The control apparatus includes a processor, and a memory that includes instructions, which when executed, cause the processor to identify an area having a line-of-sight relationship in a communication area of the base station for each parameter for determining a transmission point and a transmission direction of a radio wave transmitted from the base station, and calculate an index value regarding the identified area; and control a transmission point and a transmission direction of a radio wave transmitted from the base station by using a parameter in which the index value becomes maximum.Type: ApplicationFiled: August 21, 2020Publication date: September 28, 2023Inventors: Daisuke MURAYAMA, Shota NAKAYAMA, Kenichi KAWAMURA
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Publication number: 20230300707Abstract: There is provided a communication system including: a terminal that communicates with a base station wirelessly; and a control device, in which the terminal includes a transmission unit that transmits information on a location of the terminal, and the control device includes an information collection unit that acquires the information on the location of the terminal, an entry prediction calculation unit that predicts a future location of the terminal based on the information on the location of the terminal and that determines whether the terminal is to enter a dead zone by comparing the future position with the dead zone, and a connection destination control unit that executes control for switching a connection destination of the terminal when the entry prediction calculation unit determines that the terminal is to enter the dead zone.Type: ApplicationFiled: July 27, 2020Publication date: September 21, 2023Inventors: Shota Nakayama, Daisuke MURAYAMA, Kenichi Kawamura, Takatsune Moriyama
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Publication number: 20230276335Abstract: A communication system includes a terminal configured to wirelessly communicate with a base station and a control device. The terminal includes a transmission unit that transmits location information of the terminal. The control device includes a preliminary dead area setting unit that sets an area around a dead zone as a preliminary dead area, an information collection unit that acquires location information of the terminal, and a connection destination control unit that determines whether the terminal is in the preliminary dead area by comparing the location information of the terminal with the preliminary dead area and performs control for switching a connection destination of the terminal when the connection destination control unit determines that the terminal is in the preliminary dead area.Type: ApplicationFiled: July 27, 2020Publication date: August 31, 2023Inventors: Shota Nakayama, Daisuke MURAYAMA, Kenichi Kawamura, Takatsune Moriyama
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Publication number: 20230269637Abstract: A communication system including a terminal configured to wirelessly communicate with a base station, a plurality of IoT terminals, and a control device, in which the control device includes an IoT terminal command unit configured to select an IoT terminal around a dead zone and transmit a command of signal transmission to the selected IoT terminal, the selected IoT terminal includes a command reception unit configured to receive the command, and a signal transmission unit configured to transmit a signal according to the command, and the terminal receiving the signal transmitted from the selected IoT terminal performs a connection operation for avoiding the dead zone.Type: ApplicationFiled: July 27, 2020Publication date: August 24, 2023Inventors: Shota Nakayama, Daisuke MURAYAMA, Kenichi Kawamura, Takatsune Moriyama
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Publication number: 20230254714Abstract: The present disclosure is a local wireless communication system for forming a wireless communication environment on a predetermined band. This system includes a base station that emits a radio wave to form the wireless communication environment in a predetermined area, a plurality of sensors disposed in the area, and a controller that controls a transmission state of the radio wave from the base station. Each of the plurality sensors measures a reception quality of the measurement signal transmitted from the base station and feeds back the reception quality to the controller via the base station. The controller evaluates the reception quality fed back and determines a parameter to be given to the base station in accordance with an evaluation result. The base station transmits the measurement signal in accordance with a parameter given from the controller.Type: ApplicationFiled: June 16, 2020Publication date: August 10, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Daisuke MURAYAMA, Shota NAKAYAMA, Kenichi KAWAMURA
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Publication number: 20230166970Abstract: There is provided a thermoelectric conversion material containing Cu and Se as main components, an element M including one or two or more elements selected from Group 10 elements and Group 11 elements excluding Cu, and optional element of Te. The thermoelectric conversion material is represented by the following chemical formula. Chemical Formula: CuxSe(1?y)TeyMz, 1.95?x<2.05,0?y?0.1,0.002?z?0.03.Type: ApplicationFiled: March 22, 2021Publication date: June 1, 2023Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Koya Arai, Chompunoot Wiraseranee, Shota Nakayama
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Patent number: 11654698Abstract: A drying apparatus which dries a medium on which an image is formed with ink while conveying the medium includes a conveyance part, a heating part, a measurement part and a controller. The conveyance part conveys the medium in a predetermined conveyance direction. The heating part supplies energy to the image on the sheet conveyed in the conveyance part and dries the image. The measurement part measures a value accompanied with moisture contained in the medium. The controller estimates an amount of moisture contained in the medium based on the value measured by the measurement part, and controls at least one of the conveyance part and the heating part so as to change an amount of the energy supplied to the image based on the estimated amount of moisture.Type: GrantFiled: February 24, 2022Date of Patent: May 23, 2023Assignee: KYOCERA Document Solutions Inc.Inventors: Haruki Sayama, Masaki Murashima, Shota Nakayama, Hitoshi Hayamizu, Keisuke Yamashita, Tomoya Hotani
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Publication number: 20230128921Abstract: A wireless communication method according to an embodiment is a method executed by a wireless terminal apparatus and a quality prediction engine that predicts a quality related to communication performed by the wireless terminal apparatus, and the method includes: by the wireless terminal apparatus, notifying the quality prediction engine of information about a plurality of wireless base stations connectable to the wireless terminal apparatus, model information of the wireless terminal apparatus, information about wireless communication environment around the wireless terminal apparatus, and information detected by a sensor mounted on the wireless terminal apparatus; by the quality prediction engine, calculating, based on the notified information, a predicted value of a communication quality when the wireless terminal apparatus is connected to the plurality of connectable wireless base stations in accordance with a prediction function, and notifying the wireless terminal apparatus of the calculated predictedType: ApplicationFiled: March 2, 2020Publication date: April 27, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Keisuke WAKAO, Kenichi KAWAMURA, Takatsune MORIYAMA, Shota NAKAYAMA
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Publication number: 20230127234Abstract: A method of manufacturing a secondary battery according to the disclosure includes an attaching step of attaching a sealing plate to an open end of a case main body including a closed bottom, and a welding step of laser-welding the case main body and the sealing plate together by scanning a laser beam along a peripheral edge portion of the sealing plate. In the welding step, the laser beam applied to the peripheral edge portion of the sealing plate and to an edge of the open end of the case main body may be a pulsed laser beam including a rectangular wave and having a pulse width of from 400 ?m to 800 ?m and a frequency of from 1.2 kHz to 1.4 kHz, and the laser beam is scanned such that adjacent laser pulses of the pulsed laser beam have an overlap rate of 84.4% to 86.6%.Type: ApplicationFiled: October 21, 2022Publication date: April 27, 2023Inventor: Shota NAKAYAMA
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Publication number: 20220408453Abstract: A wireless LAN system where an interfering communication device is present around a base station device and a terminal device includes an interference control signal transmitter that transmits an interference control signal that causes the interfering communication device to wait for transmission, and an interference control signal management device that collects wireless environment information, sets wireless LAN communication between the base station device and the terminal device, which are protection targets, as protected communication, and causes the interference control signal transmitter to transmit an interference control signal that causes the interfering communication device to wait for transmission, and the interference control signal management device instructs the interference control signal transmitter to start transmitting the interference control signal when detecting a start of the protected communication and instructs the interference control signal transmitter to stop transmitting the interType: ApplicationFiled: November 26, 2019Publication date: December 22, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shota NAKAYAMA, Kenichi KAWAMURA, Takatsune MORIYAMA, Keisuke WAKAO, Yasushi TAKATORI
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Publication number: 20220386374Abstract: In a wireless LAN system that performs multi-user transmission, an access point device includes: a selection unit configured to select, as terminals to be caused to transmit CTS in response to an MU-RTS frame, terminals that satisfy predetermined conditions and include at least a terminal that is to be protected and has to satisfy predetermined low latency and low jitter, regardless of whether or not the terminals are terminals to which a resource for transmitting data should be allocated; an allocation unit configured to allocate the resource for transmitting data to the terminals; a frame generation unit configured to generate the MU-RTS frame such that the terminals selected by the selection unit transmit the CTS, and generates a frame that contains a signal indicating the resource allocated by the allocation unit; and a communication unit configured to transmit the frames generated by the frame generation unit to the plurality of terminals.Type: ApplicationFiled: November 13, 2019Publication date: December 1, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kenichi KAWAMURA, Yasushi TAKATORI, Takatsune MORIYAMA, Shota NAKAYAMA, Keisuke WAKAO