Patents by Inventor Yasushi Nakahira
Yasushi Nakahira 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: 11956662Abstract: A wireless communication system in which wireless stations perform transmission, a plurality of wireless modules that are operated in a shared frequency band being installed in the wireless stations, wherein the wireless stations each include means for notifying a control device of environment information that includes capacity information regarding the wireless station and information regarding a surrounding wireless environment, and setting frequency channels in the plurality of wireless modules, the wireless stations being notified of the frequency channels by the control device, and the control device includes means for calculating a frequency channel of each wireless module of each wireless station based on the environment information collected from each wireless station, following a control guideline that is determined in advance, and notifying the wireless stations of the frequency channels.Type: GrantFiled: June 10, 2019Date of Patent: April 9, 2024Assignee: Nippon Telegraph and Telephone CorporationInventors: Toshiro Nakahira, Hirantha Abeysekera, Tomoki Murakami, Koichi Ishihara, Takafumi Hayashi, Yasushi Takatori
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Publication number: 20240114350Abstract: A base station allocation support apparatus includes a first calculation unit that calculates radio wave propagation attenuation values between a plurality of wireless terminals in a certain area based on position information of each of the plurality of wireless terminals and information indicating a layout of the area, a clustering unit that performs clustering on the plurality of wireless terminals based on the radio wave propagation attenuation values; and a determination unit that determines an arrangement position of a wireless base station with respect to the wireless terminals based on a result of the clustering.Type: ApplicationFiled: February 9, 2021Publication date: April 4, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Toshiro NAKAHIRA, Motoharu SASAKI, Takatsune MORIYAMA, Yasushi TAKATORI
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Patent number: 11950115Abstract: A measurement station collects radio base station performance information related to a radio communication performance of each radio base station, radio connection information related to a radio communication performance and a communication status of a corresponding radio terminal station, generates a measurement condition and an expected measurement result based on the radio base station performance information and the radio connection information, and notifies a measurement control signal corresponding to the measurement condition to the radio terminal station through the radio base station; the radio terminal station performs a communication setting of an own station based on the notified measurement control signal, and notifies a measurement preparation status to the measurement station; and the measurement station measures the radio communication performance by causing a flow of a measurement traffic to the radio terminal station through the radio base station, acquiring a measurement result, and determiType: GrantFiled: April 17, 2020Date of Patent: April 2, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Toshiro Nakahira, Tomoki Murakami, Hirantha Abeysekera, Koichi Ishihara, Takafumi Hayashi, Yasushi Takatori
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Patent number: 11943645Abstract: A wireless communication characteristics evaluation method for evaluating wireless communication characteristics of a wireless communication system where a plurality of wireless communication terminals perform communication by transmitting or exchanging signals, the wireless communication characteristics evaluation method including: a step 1 of acquiring power and a band of an interference signal; a step 2 of calculating an interference band rate showing a rate of the band of the interference signal that overlaps with a band of a desired signal; a step 3 of calculating an interference power rate from interference power and the interference band rate and furthermore, calculating steady noise power from the interference power and the interference power rate; a step 4 of determining a real SINR from received power of the desired signal and the steady noise power; and a step 5 of determining wireless communication characteristics of the desired signal from the real SINR.Type: GrantFiled: March 24, 2020Date of Patent: March 26, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shoko Shinohara, Toshiro Nakahira, Yasuhiko Inoue, Hirantha Abeysekera, Koichi Ishihara, Takafumi Hayashi, Yasushi Takatori
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Patent number: 11917455Abstract: The invention of the present application provides a transmission parameter control method in a radio communication system that performs, between a radio base station and a plurality of radio terminal stations, communication of a first method in which reception confirmation is enabled and communication of a second method in which reception confirmation is not possible. The radio base station selects transmission parameters including a transmission rate in the communication of the second method with the radio terminal stations, based on radio communication information in the communication of the first method with the radio terminal stations.Type: GrantFiled: March 16, 2020Date of Patent: February 27, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Toshiro Nakahira, Tomoki Murakami, Hirantha Abeysekera, Koichi Ishihara, Takafumi Hayashi, Yasushi Takatori
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Patent number: 11917454Abstract: A wireless communications method for connecting a base station with each of a plurality of terminal stations, the base station being equipped with a plurality of wireless communications units configured to be able to select a plurality of different transmission rates and connectable with one or more of the terminal stations, includes: a collection step of collecting information about a transmission rate and multicast transmission frequency from each of the terminal stations; a policy calculation step of calculating a setting policy for setting a unicast transmission rate and a multicast transmission rate for each of the wireless communications units and a switching policy for setting a condition for switching that one of the wireless communications units which is to be connected, for each of the terminal stations based on the collected information; and a setting step of setting those of the terminal stations which are to be connected, for each of the wireless communications units based on the calculated settiType: GrantFiled: March 11, 2020Date of Patent: February 27, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Toshiro Nakahira, Tomoki Murakami, Hirantha Abeysekera, Koichi Ishihara, Takafumi Hayashi, Yasushi Takatori
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Patent number: 8182637Abstract: An object of the invention is to provide an optical display manufacturing system or method that allows an increase in the yield of an optical film, a reduction in cost and an improvement in inventory control. An optical display manufacturing system includes feeding means (11, 14) that feeds a belt and sheet-shaped product (3) having an optical film from a roll (4) of the belt and sheet-shaped product, detection means (12) that detects a defect of the belt and sheet-shaped product fed by the feeding means, cutting means (13) that cuts the belt and sheet-shaped product into individual sheet-shaped products based on the result of the detection, transfer means (16) that transports each of the sheet-shaped products from the cutting process to a sticking process, and sticking means (17) that sticks the transported sheet-shaped product to an optical display unit.Type: GrantFiled: January 3, 2012Date of Patent: May 22, 2012Assignee: Nitto Denko CorporationInventors: Yasushi Nakahira, Hideo Abe
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Publication number: 20120097316Abstract: An object of the invention is to provide an optical display manufacturing system or method that allows an increase in the yield of an optical film, a reduction in cost and an improvement in inventory control. An optical display manufacturing system includes feeding means (11, 14) that feeds a belt and sheet-shaped product (3) having an optical film from a roll (4) of the belt and sheet-shaped product, detection means (12) that detects a defect of the belt and sheet-shaped product fed by the feeding means, cutting means (13) that cuts the belt and sheet-shaped product into individual sheet-shaped products based on the result of the detection, transfer means (16) that transports each of the sheet-shaped products from the cutting process to a sticking process, and sticking means (17) that sticks the transported sheet-shaped product to an optical display unit.Type: ApplicationFiled: January 3, 2012Publication date: April 26, 2012Applicant: NITTO DENKO CORPORATIONInventors: Yasushi Nakahira, Hideo Abe
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Publication number: 20090159175Abstract: An object of the invention is to provide an optical display manufacturing system or method that allows an increase in the yield of an optical film, a reduction in cost and an improvement in inventory control. An optical display manufacturing system includes feeding means (11, 14) that feeds a belt and sheet-shaped product (3) having an optical film from a roll (4) of the belt and sheet-shaped product, detection means (12) that detects a defect of the belt and sheet-shaped product fed by the feeding means, cutting means (13) that cuts the belt and sheet-shaped product into individual sheet-shaped products based on the result of the detection, transfer means (16) that transports each of the sheet-shaped products from the cutting process to a sticking process, and sticking means (17) that sticks the transported sheet-shaped product to an optical display unit.Type: ApplicationFiled: October 2, 2006Publication date: June 25, 2009Applicant: NITTO DENKO CORPORATIONInventors: Yasushi Nakahira, Hideo Abe