Patents by Inventor Shuki WAI
Shuki WAI 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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Publication number: 20240349072Abstract: A beam setting method includes a communication method prediction step of predicting a communication method performed on the basis of whether there is a line-of-sight between a first radio station device and a second radio station device; a first beam number setting step of setting the number of beams transmitted by a beam sweep, in which signals using formable beams are sequentially transmitted in a time-division manner, to a first constant, when the communication method prediction step predicts that communication is performed by the communication method using reflected waves; and a second beam number setting step of setting the number of beams transmitted by the beam sweep to a second constant smaller than the first constant, when the communication method prediction step predicts that communication is performed by the communication method using line-of-sight waves.Type: ApplicationFiled: August 5, 2021Publication date: October 17, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Tatsuhiko IWAKUNI, Daisei UCHIDA, Takuto ARAI, Shuki WAI, Naoki KITA, Takeshi ONIZAWA
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Patent number: 12120532Abstract: On two-dimensional map data indicating buildings serving as candidates for installing terminal station devices, locations of base station installation structures serving as candidates for installing base station devices are set as base station candidate locations, and for each of the base station candidate locations, buildings that have other buildings between themselves and the base station candidate location are selected as visibility detection subject buildings. The heights of the buildings are set at an identical length, a higher position than the buildings is set as an installation altitude of the base station devices, and for each selected visibility detection subject building, a visibility range of the visibility detection subject building from the installation altitude of the base station device in the base station candidate location is detected.Type: GrantFiled: October 18, 2019Date of Patent: October 15, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hideyuki Tsuboi, Hideki Toshinaga, Kazuto Goto, Shuki Wai, Yushi Shirato, Naoki Kita, Takeshi Onizawa
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Publication number: 20240333344Abstract: A communication control method includes: a transmission step of simultaneously transmitting beam specifying signals including identical beam identifiers from a plurality of antennas to a wireless station for each of the beam identifiers by transmission beams associated with the beam identifiers; a reception step of receiving, by each of the plurality of antennas, a report signal including a selected beam identifier indicating a beam identifier selected on the basis of reception qualities of the beam specifying signals for the respective beam identifiers in the wireless station; and a selection step of selecting an antenna to be used for communication with the wireless station on the basis of reception qualities of the report signal respectively received by the plurality of antennas, and selecting a transmission beam associated with the selected beam identifier as a transmission beam to be used for communication with the wireless station.Type: ApplicationFiled: July 14, 2021Publication date: October 3, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shuki WAI, Daisel UCHIDA, Tatsuhiko IWAKUNI, Takuto ARAI, Naoki KITA
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Publication number: 20240292231Abstract: A determining method which is executed by a radio communication device includes a radio step of executing a radio communication, using two or more directional beams selected from a plurality of directional beams; and a determination step of determining which of line-of-sight waves and reflected waves is used for the executed radio communication, on the basis of an amount of variation in directions between the two or more directional beams used at different times. The determination step includes determining that the executed radio communication is radio communication using the reflected waves, when the amount of variation is equal to or greater than a threshold value.Type: ApplicationFiled: August 6, 2021Publication date: August 29, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Tatsuhiko IWAKUNI, Daisel UCHIDA, Takuto ARAI, Shuki WAI, Naoki KITA
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Publication number: 20240283517Abstract: One aspect of the present invention is a control method of a communication control device for controlling communication of a plurality of base stations in a distributed antenna system, a control method, comprising: a selection step for selecting a beam for communication with a terminal station at some of a plurality of base stations; and an allocation step of allocating a candidate beam associated in advance with the beam selected by a selection step as the candidate beam in which base stations other than some of base stations perform communication with terminal stations.Type: ApplicationFiled: January 15, 2021Publication date: August 22, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shuki WAI, Tatsuhiko IWAKUNI, Daisei UCHIDA, Naoki KITA
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Publication number: 20240259817Abstract: One aspect of the present invention is a control method in a wireless communication system including a plurality of distributed antennas that perform wireless communication with a user terminal, and a plurality of signal processing units that are connected to the plurality of distributed antennas and perform signal processing, the control method including: a setting unit that sets reference information for leveling loads of the plurality of signal processing units for each of the plurality of signal processing units; an acquisition step of acquiring load information indicating a load of a signal processing unit; and an assignment step of assigning the signal processing unit as a connection destination of the distributed antenna on the basis of the load information acquired in the acquisition step and the reference information, and leveling the loads of the plurality of signal processing units.Type: ApplicationFiled: May 17, 2021Publication date: August 1, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takuto ARAI, Daisei UCHIDA, Tatsuhiko IWAKUNI, Shuki WAI
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Publication number: 20240250718Abstract: One aspect of the present invention is a control method in a wireless communication system including a plurality of distributed antennas that perform wireless communication with a user terminal, and a plurality of signal processing units that are connected to the plurality of distributed antennas and perform signal processing, the control method including: an initial assignment step of assigning a distributed antenna to be connected to a signal processing unit; an acquisition step of acquiring load information indicating loads of the signal processing unit; a determination step of determining whether to reassign the distributed antenna to be connected to the signal processing unit on the basis of the load information acquired in the acquisition step; and a reassignment step of performing reassignment and leveling loads of the plurality of signal processing units when it is determined to reassign in the determination step.Type: ApplicationFiled: May 17, 2021Publication date: July 25, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takuto ARAI, Daisei UCHIDA, Tatsuhiko IWAKUNI, Shuki WAI
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Patent number: 11997507Abstract: 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: GrantFiled: December 18, 2019Date of Patent: May 28, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shuki Wai, Tatsuhiko Iwakuni, Hideyuki Tsuboi, Daisei Uchida, Hideki Toshinaga, Kazuto Goto, Naoki Kita
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Publication number: 20240088960Abstract: 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: ApplicationFiled: February 2, 2021Publication date: March 14, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takuto ARAI, Daisei UCHIDA, Tatsuhiko IWAKUNI, Shuki WAI
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Publication number: 20240072872Abstract: 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: ApplicationFiled: January 12, 2021Publication date: February 29, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Tatsuhiko IWAKUNI, Daisei UCHIDA, Shuki WAI, Naoki KITA
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Publication number: 20230327746Abstract: 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: ApplicationFiled: August 25, 2020Publication date: October 12, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shuki WAI, Tatsuhiko IWAKUNI, Daisei UCHIDA, Naoki KITA
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Publication number: 20230308144Abstract: 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 stationsType: ApplicationFiled: August 31, 2020Publication date: September 28, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Daisei UCHIDA, Tatsuhiko IWAKUNI, Chunhsiang HUANG, Shuki WAI, Naoki KITA, Takeshi ONIZAWA
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Publication number: 20230284302Abstract: 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: ApplicationFiled: July 29, 2020Publication date: September 7, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Tatsuhiko IWAKUNI, Daisei UCHIDA, Chunhsiang HUANG, Shuki WAI, Naoki KITA
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Publication number: 20230171609Abstract: 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 staType: ApplicationFiled: March 31, 2020Publication date: June 1, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hideyuki TSUBOI, Kazuto GOTO, Hideki TOSHINAGA, Tatsuhiko IWAKUNI, Shuki WAI, Daisei UCHIDA, Yushi SHIRATO, Naoki KITA, Takeshi ONIZAWA
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Publication number: 20230156483Abstract: 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: ApplicationFiled: March 30, 2020Publication date: May 18, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hideyuki TSUBOI, Hideki TOSHINAGA, Kazuto GOTO, Tatsuhiko IWAKUNI, Shuki WAI, Daisei UCHIDA, Yushi SHIRATO, Naoki KITA, Takeshi ONIZAWA
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Publication number: 20230097466Abstract: 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: ApplicationFiled: February 26, 2020Publication date: March 30, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Daisei UCHIDA, Tatsuhiko IWAKUNI, Chunhsiang HUANG, Shuki WAI, Naoki KITA
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Publication number: 20230022178Abstract: 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 resultType: ApplicationFiled: December 25, 2019Publication date: January 26, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hideyuki TSUBOI, Kazuto GOTO, Hideki TOSHINAGA, Shuki WAI, Tatsuhiko IWAKUNI, Daisei UCHIDA, Naoki KITA
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Publication number: 20230020465Abstract: 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: ApplicationFiled: December 18, 2019Publication date: January 19, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shuki WAI, Tatsuhiko IWAKUNI, Hideyuki TSUBOI, Daisei UCHIDA, Hideki TOSHINAGA, Kazuto GOTO, Naoki KITA
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Publication number: 20220377576Abstract: 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: ApplicationFiled: November 15, 2019Publication date: November 24, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Tatsuhiko IWAKUNI, Daisei UCHIDA, Shuki WAI, Naoki KITA
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Publication number: 20220312223Abstract: In two-dimensional map data showing buildings to be candidates in which terminal station devices are to be installed, a position of a base station installation structure to be a candidate in which a base station device is to be installed is set as a base station candidate position, an unobstructed view for each of the buildings from the base station candidate position is determined based on the map data while excluding a region blocked by the building having an unobstructed view from the base station candidate position, and a range of a contour line having an unobstructed view of the building determined as having the unobstructed view is detected as an unobstructed view range. A candidate of, among wall surfaces of the building corresponding to the detected unobstructed view range, the wall surface on which the terminal station device can be installed is extracted.Type: ApplicationFiled: September 5, 2019Publication date: September 29, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hideyuki TSUBOI, Hideki TOSHINAGA, Kazuto GOTO, Shuki WAI, Yushi SHIRATO, Naoki KITA