Patents by Inventor Daisei Uchida

Daisei Uchida 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).

  • Patent number: 11997507
    Abstract: A line-of-sight determination method includes: a point cloud data acquisition step of acquiring point cloud data including a first position indicating a position of a first wireless station and a plurality of second positions indicating positions on a structure serving as a candidate in which a second wireless station opposing the first wireless station is to be installed; and a line-of-sight determination step of determining whether or not there is a line of sight between the first position and at least one of the second positions, and determining whether or not there is a line of sight between the first wireless station and the structure based on the determination result.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: May 28, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shuki Wai, Tatsuhiko Iwakuni, Hideyuki Tsuboi, Daisei Uchida, Hideki Toshinaga, Kazuto Goto, Naoki Kita
  • 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: 20240088960
    Abstract: A wireless communication apparatus includes a terminal selection unit that selects one or more user terminals, a prediction unit that derives a prediction value of an interference amount of a stream group transmitted from a plurality of antennas for the selected one or more user terminals, a collection unit that, when the prediction value of the interference amount is less than a threshold value, collects reception power values of streams included in the stream group from the selected one or more user terminals, an antenna selection unit that selects the plurality of streams in descending order of reception power values and selecting the plurality of antennas associated with the plurality of selected streams, and a transmission unit that transmits the plurality of selected streams by beam forming using the plurality of selected antennas.
    Type: Application
    Filed: February 2, 2021
    Publication date: March 14, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takuto ARAI, Daisei UCHIDA, Tatsuhiko IWAKUNI, Shuki WAI
  • Publication number: 20240072872
    Abstract: A wireless communication system includes: a communication control device; and a plurality of wireless base station devices capable of forming a plurality of beams and transmitting signals, the communication control device including: an estimation unit configured to estimate whether or not a range of a first beam emitted by a first wireless base station device among the plurality of wireless base station devices is correlated with a range of a second beam emitted by a second wireless base station device different from the first wireless base station device; and a use prohibition unit configured to prohibit the first wireless base station device from using the first beam or prohibit the second wireless base station device from using the second beam in a case where the estimation unit estimates that the range of the first beam is correlated with the range of the second beam.
    Type: Application
    Filed: January 12, 2021
    Publication date: February 29, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tatsuhiko IWAKUNI, Daisei UCHIDA, Shuki WAI, Naoki KITA
  • Publication number: 20240063907
    Abstract: A radio communication method performed by a radio communication device includes an inverse fast Fourier transform step of performing inverse fast Fourier transform on a digital electric signal associated with a downlink radio signal, a digital-to-analogue conversion step of converting the digital electric signal subjected to the inverse fast Fourier transform into a first analogue electric signal, an electro-optic conversion step of converting the first analogue electric signal into an optical signal, a step of transmitting the optical signal, a photoelectric conversion step of converting the transmitted optical signal into a second analogue electric signal, and a step of transmitting the downlink radio signal corresponding to the second analogue electric signal.
    Type: Application
    Filed: January 22, 2021
    Publication date: February 22, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kota ITO, Mizuki SUGA, Takuto ARAI, Yushi SHIRATO, Daisei UCHIDA, Naoki KITA, Takeshi ONIZAWA
  • Patent number: 11895641
    Abstract: A control device of the present invention is for provision in a gateway device that includes multiple communication units that perform wireless communication with terminal devices using different communication methods. Based on communication unit individual information that is acquired from the communication units and includes information indicating at least characteristics of the communication methods of the communication units, operations of the communication units are scheduled so as to prevent the overlapping of periods in which the communication units perform signal transmission/reception with the terminal devices.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: February 6, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Kento Yoshizawa, Ryo Miyatake, Yusuke Asai, Daisei Uchida
  • Publication number: 20230327746
    Abstract: A wireless communication method includes a reception step of receiving a signal transmitted from a first wireless station, a transmission step of transmitting the signal received in the reception step to a second wireless station, a control signal transmission/reception step of transmitting/receiving a control signal related to switching of a reception beam used in the reception step or a transmission beam used in the transmission step, and a beam control step of controlling switching of the reception beam or the transmission beam on the basis of the control signal.
    Type: Application
    Filed: August 25, 2020
    Publication date: October 12, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shuki WAI, Tatsuhiko IWAKUNI, Daisei UCHIDA, Naoki KITA
  • Publication number: 20230308144
    Abstract: A method of estimating inter-user orthogonality in a distributed antenna system in which a base station includes a plurality of distributed antennas installed at a plurality of locations and which performs simultaneous radio transmissions with a plurality of user stations, the method of estimating inter-user orthogonality including the steps of: estimating a position of each of the user stations on the basis of installation positions of the plurality of distributed antennas, beam directions of the plurality of distributed antennas to each user station being a radio transmission partner, and an antenna height of each of the user stations; estimating an interference radio wave direction on the basis of the position of each of the user stations estimated in the step of estimating a position and installation positions of the plurality of distributed antennas; and calculating an angle difference between the beam direction and the interference radio wave direction to estimate orthogonality between the user stations
    Type: Application
    Filed: August 31, 2020
    Publication date: September 28, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Daisei UCHIDA, Tatsuhiko IWAKUNI, Chunhsiang HUANG, Shuki WAI, Naoki KITA, Takeshi ONIZAWA
  • Publication number: 20230284302
    Abstract: A radio communication method performed by a terminal station device includes: a first radio communication step of establishing connection to a first base station device among a plurality of surrounding base station devices; a control step of recording information regarding the first base station device on a storage unit as first connection destination information; and a second radio communication step of establishing connection to a second base station device different from the first base station device with regard to the first connection destination information among the plurality of base station devices.
    Type: Application
    Filed: July 29, 2020
    Publication date: September 7, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tatsuhiko IWAKUNI, Daisei UCHIDA, Chunhsiang HUANG, Shuki WAI, Naoki KITA
  • Publication number: 20230171609
    Abstract: A method includes generating, based on data indicating the travel trajectory of a mobile object, which acquires point group data indicating the position of an object present in a three-dimensional space within a predetermined measurable distance, the measurable distance, candidate base station position data indicating a candidate position for installing a base station apparatus, and candidate terminal station position data indicating a candidate position for installing a terminal station apparatus, data indicating the positional relationship between the travel trajectory and a candidate base station position, and data indicating the positional relationship between the travel trajectory and a candidate terminal station position; generating data indicating a measurable range based on the travel trajectory data and the measurable distance; generating data indicating a connecting line segment connecting the candidate base station position and the candidate terminal station position based on the candidate base sta
    Type: Application
    Filed: March 31, 2020
    Publication date: June 1, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hideyuki TSUBOI, Kazuto GOTO, Hideki TOSHINAGA, Tatsuhiko IWAKUNI, Shuki WAI, Daisei UCHIDA, Yushi SHIRATO, Naoki KITA, Takeshi ONIZAWA
  • Publication number: 20230156483
    Abstract: A station deployment support method includes a positional relationship identification step of, based on travel trajectory data of a mobile object that measures an object present in a three-dimensional space within a predetermined measurable distance and acquires point group data on the measured object, the measurable distance, candidate base station position data, and candidate terminal station position data, generating base station positional relationship identification data and terminal station positional relationship identification data; a measurable range identification step of generating measurable range data based on the travel trajectory data and the measurable distance; and a travel trajectory selection step of selecting at least one piece of travel trajectory data so that the proportion of the measurable range in a predetermined evaluation area satisfies a predetermined value.
    Type: Application
    Filed: March 30, 2020
    Publication date: May 18, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hideyuki TSUBOI, Hideki TOSHINAGA, Kazuto GOTO, Tatsuhiko IWAKUNI, Shuki WAI, Daisei UCHIDA, Yushi SHIRATO, Naoki KITA, Takeshi ONIZAWA
  • Publication number: 20230097466
    Abstract: A plurality of ground station devices perform wireless communication processing for a side of a terminal station; and a single or a plurality of mobile station devices perform wireless communication processing for a side of a base station, so as to make a wireless connection in parallel with a plurality of the ground station devices having a line of sight.
    Type: Application
    Filed: February 26, 2020
    Publication date: March 30, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Daisei UCHIDA, Tatsuhiko IWAKUNI, Chunhsiang HUANG, Shuki WAI, Naoki KITA
  • Publication number: 20230022178
    Abstract: The present invention performs: generating base station positional relationship specification data indicating a positional relationship between travel trajectory and a base station candidate position, and terminal station positional relationship specification data indicating a positional relationship between the travel trajectory and a terminal station candidate position, based on travel trajectory data indicating the travel trajectory of a moving body for measuring an object present in a three-dimensional space within a measurable distance predetermined and acquiring point cloud data indicating a position of the object measured in the three-dimensional space, the measurable distance, base station candidate position data indicating a candidate position for installing a base station apparatus, and terminal station candidate position data indicating a candidate position for installing a terminal station apparatus; and specifying a reliability coefficient indicating a degree of reliability of a processing result
    Type: Application
    Filed: December 25, 2019
    Publication date: January 26, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hideyuki TSUBOI, Kazuto GOTO, Hideki TOSHINAGA, Shuki WAI, Tatsuhiko IWAKUNI, Daisei UCHIDA, Naoki KITA
  • Publication number: 20230020465
    Abstract: A line-of-sight determination method includes: a point cloud data acquisition step of acquiring point cloud data including a first position indicating a position of a first wireless station and a plurality of second positions indicating positions on a structure serving as a candidate in which a second wireless station opposing the first wireless station is to be installed; and a line-of-sight determination step of determining whether or not there is a line of sight between the first position and at least one of the second positions, and determining whether or not there is a line of sight between the first wireless station and the structure based on the determination result.
    Type: Application
    Filed: December 18, 2019
    Publication date: January 19, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shuki WAI, Tatsuhiko IWAKUNI, Hideyuki TSUBOI, Daisei UCHIDA, Hideki TOSHINAGA, Kazuto GOTO, Naoki KITA
  • Publication number: 20220377576
    Abstract: A wireless communication system has a communication control device and a plurality of wireless communication devices. The communication control device transmits, to one of the wireless communication devices, information regarding a measurement target device that is another one of the wireless communication devices with which interference power is to be measured. Each of the wireless communication devices includes a wireless unit, a power measurement unit, and a communication control unit. The wireless unit forms a beam and transmits and receives a wireless signal using the formed beam. The power measurement unit measures power of a wireless signal received by the wireless unit.
    Type: Application
    Filed: November 15, 2019
    Publication date: November 24, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tatsuhiko IWAKUNI, Daisei UCHIDA, Shuki WAI, Naoki KITA
  • Publication number: 20220353054
    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: Application
    Filed: July 1, 2019
    Publication date: November 3, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kento YOSHIZAWA, Yosuke FUJINO, Yusuke ASAI, Daisei UCHIDA, Ryo MIYATAKE
  • Publication number: 20220279530
    Abstract: A control device of the present invention is for provision in a gateway device that includes multiple communication units that perform wireless communication with terminal devices using different communication methods. Based on communication unit individual information that is acquired from the communication units and includes information indicating at least characteristics of the communication methods of the communication units, operations of the communication units are scheduled so as to prevent the overlapping of periods in which the communication units perform signal transmission/reception with the terminal devices.
    Type: Application
    Filed: July 1, 2019
    Publication date: September 1, 2022
    Inventors: Kento Yoshizawa, Ryo Miyatake, Yusuke Asai, Daisei Uchida
  • Publication number: 20220248340
    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: Application
    Filed: April 6, 2020
    Publication date: August 4, 2022
    Inventors: Ryo Miyatake, Yusuke Asai, Daisei Uchida, Kazunori Akabane
  • Patent number: 8644766
    Abstract: A radio communication system includes a transmission device which transmits a plurality of radio signals, and a reception device which receives the plurality of radio signals from the transmission device and estimates, as a carrier frequency offset, a difference between a carrier frequency transmitted by the transmission device and a reference reception frequency used for reception. The system includes the transmission device which branches a first previously determined sequence of training signals, and transmits the radio signals modulated with frequencies by the carrier frequency offsets having regularity for a first sequence of a plurality of branched training signals, and the reception device which estimates the carrier frequency offset with the transmission device according to the first sequence of training signals included in the radio signals transmitted from the transmission device and phase shift amounts obtained from the first previously determined sequence of training signals.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: February 4, 2014
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yosuke Fujino, Daisei Uchida, Takafumi Fujita
  • Patent number: 8248975
    Abstract: A wireless transmitting apparatus inserts a training signal into a transmission burst at fixed symbol intervals as a pilot signal, a wireless receiving apparatus performs AD conversion of a received burst signal, performs symbol timing recovery, performs frame position detection and pilot signal extraction from the received burst signal for which symbol timing was established, performs frame synchronization, and performs a carrier frequency estimation using pilot signal. A carrier frequency estimation is also performed with respect to a received burst signal for which frame synchronization was established, and channel distortion is estimated and output based on a frequency-corrected received burst signal. Channel distortion estimation is then performed with respect to a frequency-corrected received burst signal, and a data symbol sequence of the channel-compensated received burst signal is converted to a received data bit stream.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: August 21, 2012
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Takafumi Fujita, Daisei Uchida, Yosuke Fujino, Osamu Kagami, Masahiro Umehira