Patents by Inventor Tatsuhiko IWAKUNI

Tatsuhiko IWAKUNI 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: 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