Patents by Inventor Tohru Sunaga
Tohru Sunaga 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: 10122424Abstract: A mobile communication system is a mobile communication system that performs communication between a base station and a user terminal. When a directivity is formed to transmit a radio signal, the base station transmits a first radio signal including identification information to identify the formed directivity and a reference signal. The user terminal receives the first radio signal and transmits a second radio signal including quality information when receiving the reference signal and the identification information. The base station receives the second radio signal and determines the directivity to be formed based on the identification information and the quality information.Type: GrantFiled: April 7, 2016Date of Patent: November 6, 2018Assignee: KYOCERA CorporationInventors: Fangwei Tong, Atsuhisa Inakoshi, Kugo Morita, Masato Fujishiro, Chiharu Yamazaki, Akinori Iwabuchi, Tohru Sunaga
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Publication number: 20180076856Abstract: A mobile communication system is a mobile communication system that performs communication between a base station and a user terminal. When a directivity is formed to transmit a radio signal, the base station transmits a first radio signal including identification information to identify the formed directivity and a reference signal. The user terminal receives the first radio signal and transmits a second radio signal including quality information when receiving the reference signal and the identification information. The base station receives the second radio signal and determines the directivity to be formed based on the identification information and the quality information.Type: ApplicationFiled: April 7, 2016Publication date: March 15, 2018Applicant: KYOCERA CORPORATIONInventors: Fangwei TONG, Atsuhisa INAKOSHI, Kugo MORITA, Masato FUJISHIRO, Chiharu YAMAZAKI, Akinori IWABUCHI, Tohru SUNAGA
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Patent number: 9832799Abstract: A mobile communication system according to the embodiment supports cellular communication in which a data path passes through a network and D2D communication that is direct device-to-device communication in which a data path does not pass through the network. A frequency division multiplexing scheme is applied to the cellular communication and a code division multiplexing scheme is applied to the D2D communication. The network assigns a spread code having orthogonality to a user terminal in response to a request from the user terminal. The user terminal performs the D2D communication by using the spread code assigned by the network.Type: GrantFiled: February 18, 2014Date of Patent: November 28, 2017Assignee: KYOCERA CorporationInventors: Kugo Morita, Akinori Iwabuchi, Tohru Sunaga
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Publication number: 20150382392Abstract: A mobile communication system according to the embodiment supports cellular communication in which a data path passes through a network and D2D communication that is direct device-to-device communication in which a data path does not pass through the network. A frequency division multiplexing scheme is applied to the cellular communication and a code division multiplexing scheme is applied to the D2D communication. The network assigns a spread code having orthogonality to a user terminal in response to a request from the user terminal. The user terminal performs the D2D communication by using the spread code assigned by the network.Type: ApplicationFiled: February 18, 2014Publication date: December 31, 2015Applicant: KYOCERA CORPORATIONInventors: Kugo MORITA, Akinori IWABUCHI, Tohru SUNAGA
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Publication number: 20140301239Abstract: A mobile communication method for a mobile communication method that includes UE supporting MDT (minimization of drive tests), and a network for communication with the UE, the method including: a step in which, after a UE has been selected to collect measurement data in an MDT, the UE receives a Logged Measurement Configuration from the network; and a step in which the UE carries out a measurement process on the network, in accordance with the Logged Measurement Configuration from the network. The Logged Measurement Configuration includes Trace information relating to the network entity that selected the UE to collect measurement data.Type: ApplicationFiled: November 28, 2011Publication date: October 9, 2014Applicant: KYOCERA CORPORATIONInventors: Noriyoshi Fukuta, Tohru Sunaga
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Patent number: 7817975Abstract: A wireless communication system includes: a base station; a first wireless communication terminal that receives a first signal from the base station; and a second wireless communication terminal that receives a second signal from the base station. The first signal is to be used by the second wireless communication terminal. The first wireless communication terminal includes: a transmitting unit that transmits the first signal to the second wireless communication terminal. The second wireless communication terminal includes: a receiving unit that receives the first signal from the first wireless communication terminal; and a signal synthesizing unit that receives the first signal from the receiving unit and performs at least one synthesis based on the first signal and the second signal.Type: GrantFiled: April 10, 2006Date of Patent: October 19, 2010Assignee: Kyocera CorporationInventor: Tohru Sunaga
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Patent number: 7697848Abstract: A wireless communication system, a wireless transmitting apparatus, and a wireless receiving apparatus which can be applied to all types of light sources and can be applied to a variety of fields, provided with a medium forming an information transmission source, a general light source made of for example a lamp or the sun or another natural light source or artificial light source, a wireless transmitting apparatus for making the polarization of the light from the light source uniform and controlling the polarization plane of an infrared ray, visible ray, UV ray, or other light (modulating the light in polarization) so as to superimpose other information invisible to the human eye on visual information due to general reflected light and transmitting the same as an optical wireless signal, and a wireless receiving apparatus for receiving the optical wireless signal transmitted from the wireless transmitting apparatus and able to determine a change in orientation of the polarization plane of the light as informType: GrantFiled: May 30, 2006Date of Patent: April 13, 2010Assignee: Kyocera CorporationInventors: Tohru Sunaga, Yasuyuki Irie
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Publication number: 20100060523Abstract: An adaptive away antenna apparatus having an array antenna which includes a plurality of antenna elements, wherein a received signal received by each of the antenna elements is weighted by a weighting factor, and then the received signals of the antenna elements are synthesized to be output as a synthesized signal. The apparatus includes a weighting-factor computing device for computing a weighting factor assigned to the received signal of each antenna element by using adaptive control; and an adaptive-control varying device for varying the adaptive control used by the weighting-factor computing device, in accordance with the number of times the computation is performed by the adaptive-control varying device with respect to the weighting factor. The adaptive-control varying device varies the adaptive control by decreasing the rate of update with respect to the weighting factor in accordance with the number of times the computation is performed.Type: ApplicationFiled: October 26, 2006Publication date: March 11, 2010Applicant: Kyocera CorporationInventors: Chiharu Yamazaki, Tohru Sunaga
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Patent number: 7551943Abstract: A wireless communication method includes: transmitting an estimation signal from a first communication device with a first plurality of antenna elements to a second communication device with a second plurality of antenna elements at a training phase for synchronization in a first type of wireless communication using an adaptive array system between the first and second communication devices; detecting the estimation signal by the second communication device; and estimating, based on the detection of the estimation signal, whether or not a wireless communication channel between the first and second communication devices is adaptable to a second type of wireless communication using a multi-input multi-output (MIMO) system.Type: GrantFiled: March 21, 2006Date of Patent: June 23, 2009Assignee: Kyocera CorporationInventors: Tohru Sunaga, Shigeru Kimura
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Publication number: 20060269293Abstract: A wireless communication system, a wireless transmitting apparatus, and a wireless receiving apparatus which can be applied to all types of light sources and can be applied to a variety of fields, provided with a medium forming an information transmission source, a general light source made of for example a lamp or the sun or another natural light source or artificial light source, a wireless transmitting apparatus for making the polarization of the light from the light source uniform and controlling the polarization plane of an infrared ray, visible ray, UV ray, or other light (modulating the light in polarization) so as to superimpose other information invisible to the human eye on visual information due to general reflected light and transmitting the same as an optical wireless signal, and a wireless receiving apparatus for receiving the optical wireless signal transmitted from the wireless transmitting apparatus and able to determine a change in orientation of the polarization plane of the light as informType: ApplicationFiled: May 30, 2006Publication date: November 30, 2006Inventors: Tohru Sunaga, Yasuyuki Irie
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Publication number: 20060240792Abstract: A wireless communication system includes: a base station; a first wireless communication terminal that receives a first signal from the base station; and a second wireless communication terminal that receives a second signal from the base station. The first signal is to be used by the second wireless communication terminal. The first wireless communication terminal includes: a transmitting unit that transmits the first signal to the second wireless communication terminal. The second wireless communication terminal includes: a receiving unit that receives the first signal from the first wireless communication terminal; and a signal synthesizing unit that receives the first signal from the receiving unit and performs at least one synthesis based on the -first signal and the second signal.Type: ApplicationFiled: April 10, 2006Publication date: October 26, 2006Inventor: Tohru Sunaga
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Publication number: 20060217075Abstract: A wireless communication method includes: transmitting an estimation signal from a first communication device with a first plurality of antenna elements to a second communication device with a second plurality of antenna elements at a training phase for synchronization in a first type of wireless communication using an adaptive array system between the first and second communication devices; detecting the estimation signal by the second communication device; and estimating, based on the detection of the estimation signal, whether or not a wireless communication channel between the first and second communication devices is adaptable to a second type of wireless communication using a multi-input multi-output (MIMO) system.Type: ApplicationFiled: March 21, 2006Publication date: September 28, 2006Inventors: Tohru Sunaga, Shigeru Kimura
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Patent number: 6867735Abstract: An adaptive antenna array system includes an antenna array having a plurality of antenna elements, the antenna array synthesizing received signals received by each of the antenna elements by weighting them according to a weighting coefficient and outputting a synthesized signal, a weighting coefficient calculation unit for calculating the weighting coefficient of received signals by adaptive control, an evaluation unit for evaluating the convergence status of adaptive control by the weighting coefficient calculation unit, and a control unit for controlling the operation of adaptive control by the weighting coefficient calculation unit corresponding to the results of evaluation of convergence status by the evaluation unit.Type: GrantFiled: March 26, 2004Date of Patent: March 15, 2005Assignees: KDDI Corporation, Kyocera CorporationInventors: Shi Song, Tohru Sunaga
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Publication number: 20040189520Abstract: An adaptive antenna array system includes an antenna array having a plurality of antenna elements, the antenna array synthesizing received signals received by each of the antenna elements by weighting them according to a weighting coefficient and outputting a synthesized signal, a weighting coefficient calculation unit for calculating the weighting coefficient of received signals by adaptive control, an evaluation unit for evaluating the convergence status of adaptive control by the weighting coefficient calculation unit, and a control unit for controlling the operation of adaptive control by the weighting coefficient calculation unit corresponding to the results of evaluation of convergence status by the evaluation unit.Type: ApplicationFiled: March 26, 2004Publication date: September 30, 2004Inventors: Shi Song, Tohru Sunaga