Patents by Inventor Yusuke Asai

Yusuke Asai 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).

  • Publication number: 20250016576
    Abstract: A frequency state observation system according to an embodiment includes a spectrum observation device that observes a spectrum of a frequency range that can be used by a plurality of wireless communication systems, a control device that controls the spectrum observation device to perform a plurality of single sweeps over the frequency range, and a wireless communication device that transmits, by a radio signal, information indicating a frequency of occurrence of a signal having a predetermined threshold or more included in a spectrum observed by the spectrum observation device performing a plurality of single sweeps, with respect to a predetermined time.
    Type: Application
    Filed: November 19, 2021
    Publication date: January 9, 2025
    Inventors: Shoko SHINOHARA, Yusuke Asai, Yasushi TAKATORI, Junichi Iwatani, Yoshitaka SHIMIZU, Tomoyuki Yamada
  • Publication number: 20250008556
    Abstract: The wireless communication system includes a wireless terminal and a control unit. The wireless terminal includes a plurality of wireless modules that respectively perform wireless communication with a plurality of base stations on different channels. The wireless terminal uses one of the plurality of wireless modules as a use module, and stops data transmission from wireless modules other than the use module. The control unit performs switching of the use module in the wireless terminal such that a transmission time rate of each of the plurality of wireless modules does not exceed a predetermined upper limit.
    Type: Application
    Filed: November 30, 2021
    Publication date: January 2, 2025
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Junichi IWATANI, Shoko SHINOHARA, Yusuke ASAI, Yasushi TAKATORI, Tomoyuki YAMADA, Yoshitaka SHIMIZU
  • Publication number: 20240430750
    Abstract: A wireless apparatus according to an aspect of the present invention includes a threshold determination unit that determines a threshold used for determining a usage state of a frequency channel, the threshold determination unit setting the threshold to a first value when a first priority that is a priority of a frame to be transmitted is a first priority level and setting the threshold to a second value higher than the first value when the first priority is a second priority level higher than the first priority level, and a carrier sense control unit that determines the usage state of the frequency channel based on a comparison between reception power of a frame detected on the frequency channel by carrier sense and the threshold.
    Type: Application
    Filed: August 18, 2021
    Publication date: December 26, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hanae OTANI, Kengo NAGATA, Akira KISHIDA, Shoko SHINOHARA, Yusuke ASAI, Yasushi TAKATORI
  • Publication number: 20240413887
    Abstract: A network includes: a first link between a first STA as a repeater and a first AP as a parent device; and a second link between a second STA as a child device and the first STA. A first transmission time is set during which transmission is permitted to the first link based on a first amount of transmission. A second transmission time is set during which transmission is permitted to the second link based on a second amount of transmission. An entire transmission cycle is determined based on the first transmission time and the second transmission time. A first transmission period and a second transmission period do not overlap in the entire transmission cycle. Wireless communication performed on the first link is limited within the first transmission period. Wireless communication performed on the second link is limited within the second transmission period.
    Type: Application
    Filed: November 9, 2021
    Publication date: December 12, 2024
    Inventors: Shoko SHINOHARA, Yusuke ASAI, Yoshitaka SHIMIZU, Junichi IWATANI, Tomoyuki YAMADA, Yasushi TAKATORI
  • Patent number: 12160797
    Abstract: A base station (10) according to an embodiment includes a data processing unit (101) and a wireless signal processing unit (103). The data processing unit (101) generates a MAC frame. The MAC frame includes input data and an identification bit (CB). The identification bit (CB) indicates that data is extended broadcast data. The wireless signal processing unit (103) converts the MAC frame into a wireless signal to distribute the wireless signal.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: December 3, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yasuhiko Inoue, Shoko Shinohara, Akira Kishida, Kengo Nagata, Yusuke Asai, Yasushi Takatori
  • Publication number: 20240389147
    Abstract: In a wireless communication method between a base station and a plurality of wireless terminals, the base station includes a plurality of first wireless modules that perform wireless communication using different channels that do not overlap each other, and each of the plurality of wireless terminals includes a second wireless module that performs wireless communication using any one communication channel. The wireless communication method includes executing a channel switching process of switching use states of the plurality of first wireless modules according to a predetermined schedule so as to enable any one of the plurality of first wireless modules to carry out transmission and to prohibit the other thereof from carrying out transmission. Further, there is a sleeping of an operation of the second wireless module while the first wireless module that performs wireless communication using the communication channel is prohibited from carrying out transmission.
    Type: Application
    Filed: October 1, 2021
    Publication date: November 21, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shoko SHINOHARA, Yusuke ASAI, Yasushi TAKATORI, Junichi IWATANI, Yoshitaka SHIMIZU, Tomoyuki YAMADA
  • Publication number: 20240373213
    Abstract: A transmitting station includes a fragmentation unit, a packet number allocation unit, an encryption unit, a wireless signal processing unit, and a retransmission control unit. The fragmentation unit divides data into fragments. The packet number allocation unit allocates a first packet number to the fragments. The encryption unit encrypts the fragments on the basis of the first packet number. The wireless signal processing unit transmits the fragments encrypted as a wireless signal to a receiving station. When retransmitting the data, the retransmission control unit instructs the packet number allocation unit to reset the first packet number to an initial value, requests the receiving station to reset a second packet number managed by the receiving station to an initial value for decryption of the fragments encrypted, and instructs the fragmentation unit to reconfigure an unsuccessfully transmitted fragment.
    Type: Application
    Filed: August 30, 2021
    Publication date: November 7, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Akira KISHIDA, Kengo NAGATA, Shoko SHINOHARA, Hanae OTANI, Yusuke ASAI, Yasushi TAKATORI
  • Publication number: 20240340685
    Abstract: An access point of an embodiment includes first and second wireless signal processing units and a link management unit. The link management unit establishes a multi-link with a first wireless terminal apparatus using the first and second wireless signal processing units. The link management unit is capable of setting at least the multi-link to a first operation mode and sets the first and second wireless signal processing units to an intermittent operation mode in the first operation mode. When the multi-link is set to the first operation mode and first data addressed to the first wireless terminal apparatus is input, the link management unit causes at least one wireless signal processing unit associated with a traffic identifier attached to the first data to transmit a beacon signal including information indicating that the first data has been buffered.
    Type: Application
    Filed: August 18, 2021
    Publication date: October 10, 2024
    Inventors: Akira KISHIDA, Kengo NAGATA, Shoko SHINOHARA, Hanae OTANI, Yusuke Asai, Yasushi TAKATORI
  • Publication number: 20240340829
    Abstract: A transmitting station which is a station that transmits a wireless signal includes a first wireless signal processing unit, a second wireless signal processing unit, and a transmission timing adjustment unit. The first wireless signal processing unit transmits and receives a wireless signal using a first channel. The second wireless signal processing unit transmits and receives a wireless signal using a second channel different from the first channel. The transmission timing adjustment unit adjusts transmission timings of first data and second data on the basis of a first status associated with the first wireless signal processing unit and a second status associated with the second wireless signal processing unit.
    Type: Application
    Filed: August 18, 2021
    Publication date: October 10, 2024
    Inventors: Akira KISHIDA, Kengo NAGATA, Shoko SHINOHARA, Hanae OTANI, Yusuke ASAI, Yasushi TAKATORI
  • Publication number: 20240334468
    Abstract: A wireless communication system includes a plurality of wireless communication apparatuses forming a wireless communication network. The system also includes one or a plurality of control apparatuses that controls the plurality of wireless communication apparatuses. Each of the plurality of wireless communication apparatuses includes a plurality of network interface controllers (NICs) that performs wireless communication through different channels that do not overlap each other. The control apparatus executes channel switching processing of switching a use state of the plurality of NICs in each wireless communication apparatus. The control apparatus controls the plurality of wireless communication apparatuses to use NICs of the same channel in the same period. The control apparatus controls to share connection information regarding each of the plurality of NICs in advance before the channel switching processing.
    Type: Application
    Filed: July 20, 2021
    Publication date: October 3, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shoko SHINOHARA, Yusuke ASAI, Yasushi TAKATORI, Junichi IWATANI, Tomoyuki YAMADA, Yoshitaka SHIMIZU
  • Publication number: 20240334417
    Abstract: A wireless communication system includes a plurality of wireless communication apparatuses that constitutes a wireless communication network and one or a plurality of control apparatuses that controls the plurality of wireless communication apparatuses. The plurality of wireless communication apparatuses includes a base station, a first wireless terminal, and a second wireless terminal. Each of the base station and the first wireless terminal includes N (N is an integer of two or more) network interface controllers (NICs), and the second wireless terminal includes M (M<N) NICs. The control apparatus executes channel switching processing of switching a use state of the N NICs in the base station and the first wireless terminal. The control apparatus controls the base station and the first wireless terminal to use NICs of the same channel in the same period.
    Type: Application
    Filed: July 20, 2021
    Publication date: October 3, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shoko SHINOHARA, Yusuke ASAI, Yasushi TAKATORI, Junichi IWATANI, Tomoyuki YAMADA, Yoshitaka SHIMIZU
  • Publication number: 20240314827
    Abstract: A wireless communication management apparatus includes a determination unit, an evaluation unit, and a selection unit. The determination unit determines an interference relationship of a combination of bandwidth and channel on the basis of wireless environment information collected from one or more terminals capable of wireless communication with a base station. The evaluation unit calculates an evaluation value for each combination of bandwidth and channel on the basis of the interference relationship. The selection unit selects one combination from the combinations of bandwidth and channel on the basis of the evaluation value.
    Type: Application
    Filed: December 25, 2020
    Publication date: September 19, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shoko SHINOHARA, Yasuhiko INOUE, Yusuke ASAI, Yasushi TAKATORI
  • Publication number: 20240305555
    Abstract: A wireless communication management apparatus (100) according to one aspect of the present invention includes a path calculation unit (152) that, on the basis of wireless environment information collected from one or more relay base stations (210) and a plurality of terminals (300) configured to wirelessly communicate with a root base station (200), calculates one or more path candidates which are connectable paths that can be taken as a network configuration by multi-hop communication and in which a traffic amount of each relay base station (210) included in the connectable paths is less than a threshold, and a determination unit (153) that determines one of the one or more path candidates as an optimal path.
    Type: Application
    Filed: December 25, 2020
    Publication date: September 12, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shoko SHINOHARA, Yasuhiko INOUE, Yusuke ASAI, Yasushi TAKATORI
  • Publication number: 20240275565
    Abstract: In a wireless communication system in which an AP 1 and a plurality of STAs 2 perform wireless communication, the AP 1 notifies each of the STAs 2 of a schedule of channel transition including a transition destination channel and a timing of channel transition different for each of the STAs 2 (or each group thereof), and then executes a channel switching process, and when the STA 2 receives the schedule of channel transition, the STA 2 stops transmission, and thereafter executes a connection process with the AP 1 at the timing according to the schedule. It is possible to shorten the time until the communication with the AP is resumed by avoiding collision of wireless frames between the terminals (STAs) when the channel is changed.
    Type: Application
    Filed: June 10, 2021
    Publication date: August 15, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shoko SHINOHARA, Tomoyuki YAMADA, Yusuke ASAI, Yasushi TAKATORI
  • Publication number: 20240276393
    Abstract: The interference control system provides a control device disposed in a public network with a resource application based on a message issued regarding use of a wireless resource by an interfering device disposed in a carrier network. A response based on a message issued by the control device in response to the resource application is provided to the interfering device that has issued the resource application. A repeater estimates, on the basis of interfered-with device information, an increase amount in the total amount of interference caused in each of used frequency channels of the interfered-with device in a case where the interfering device performs transmission in each of frequency channels with a prescribed transmission power. An estimation result of the increase amount is reflected in at least one of the resource application from the interfering device and the response to the interfering device.
    Type: Application
    Filed: June 8, 2021
    Publication date: August 15, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Junichi IWATANI, Yasuhiko INOUE, Yusuke ASAI, Yasushi TAKATORI
  • Patent number: 12034830
    Abstract: A communication method determination apparatus includes a comparison unit and an instruction unit. The comparison unit obtains a bit string of a portion of a physical header for synchronization from a wireless frame that includes the physical header for synchronization in which information for synchronization in a physical layer is set and a physical data portion in which data of a higher-level layer than the physical layer is set, and compares the obtained bit string with a bit string pattern specific to a communication method targeted for determination. The instruction unit performs communication method determination processing for determining whether or not the communication method targeted for determination is used for the wireless frame, based on a result of comparison.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: July 9, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kento Yoshizawa, Yosuke Fujino, Yusuke Asai, Daisei Uchida, Ryo Miyatake
  • Patent number: 12032425
    Abstract: A data processing apparatus (14) according to an embodiment includes a data processing unit (105) and a wireless unit (104). The wireless unit receives the data converted by the data processing unit and wirelessly transmits the input data to an access point. The data processing unit converts, when a remaining amount input from a battery (12) is in a first state, the input data with a first setting and outputs the converted data to the wireless unit. The data processing unit converts, when the remaining amount of the battery is in a second state different from the first state, the input data with a second setting and outputs the converted data to the wireless unit. A capacity per unit time of the data after conversion is different between the first setting and the second setting.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: July 9, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yasuhiko Inoue, Shoko Shinohara, Kengo Nagata, Yusuke Asai, Akira Kishida, Yasushi Takatori
  • Publication number: 20240205798
    Abstract: A base station of an embodiment includes a first wireless signal processing unit, a second wireless signal processing unit, and a beacon management unit. The first wireless signal processing unit is configured to be able to transmit and receive a wireless signal using a first channel. The second wireless signal processing unit is configured to be able to transmit and receive a wireless signal using a second channel different from the first channel. The beacon management unit manages transmission of a beacon of the first wireless signal processing unit so that the first beacon is periodically transmitted from the first radio signal processing unit, and manages transmission of a beacon of the second wireless signal processing unit so that the first beacon and a second beacon including information simplified than information included in the first beacon are periodically switched and transmitted from the second wireless signal processing unit.
    Type: Application
    Filed: April 19, 2021
    Publication date: June 20, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Akira KISHIDA, Yasuhiko INOUE, Kengo NAGATA, Yusuke ASAI, Yasushi TAKATORI
  • Patent number: 11979839
    Abstract: An interference wave arithmetic operation method performed by a wireless communication system including a plurality of antennas, the method including: determining an interferer antenna on the basis of information regarding directivity, a position, and an orientation of each of the plurality of antennas; and calculating interference wave reception intensity of a victim antenna using an interference wave from the determined interferer antenna.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: May 7, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Ryo Miyatake, Yusuke Asai, Daisei Uchida, Kazunori Akabane
  • Publication number: 20240147296
    Abstract: Provided is an interference control system for wireless communication suitable for limiting the total amount of interference to which an interfered-with wireless communicator to be protected is subjected by interfering wireless communicators. A repeater disposed between the interfering wireless communicator and a controller includes a processor and a memory storing a program executed by the processor. The processor acquires registration information including a position and a transmission power for each interfering wireless communicator, and estimates, for each interfering wireless communicator, a terminal range in which there is a likelihood that a terminal wireless communicator communicating with the interfering wireless communicator is present based on the position and the transmission power. The processor transmits a registration application including the terminal range to the control device.
    Type: Application
    Filed: June 8, 2021
    Publication date: May 2, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Junichi IWATANI, Yasuhiko INOUE, Yusuke ASAI, Yasushi TAKATORI