Patents by Inventor Mitsuru Sakamoto
Mitsuru Sakamoto 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: 9510249Abstract: A wireless communication system allows a handover operation to a base station communicating through a plurality of frequency bands. The mobile terminal includes a communication unit adapted to perform communication with any of the base stations through a plurality of frequency bands. The communication unit of the base station notifies, when communication through a plurality of frequency bands is possible, a mobile terminal about information directed to identifying a main frequency band from relevant frequency bands in a manner allowing discrimination from one or more frequency bands other than the main frequency band. The communication unit of the mobile terminal determines that, upon receiving information directed to identifying a main frequency band from the second base station during having communication connection with the first base station, that the frequency band identified by the relevant information is a subject of handover towards the second base station.Type: GrantFiled: February 6, 2013Date of Patent: November 29, 2016Assignee: Sharp Kabushiki KaishaInventors: Kouki Suzuki, Shinichi Sawada, Tadashi Shimonabe, Shigeto Suzuki, Mitsuru Sakamoto, Yuhsuke Takagi, Akio Yoshihara, Shumpei Fuse
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Patent number: 9215635Abstract: During a period of parallel-like radio communication with two or more first base stations, the first base station designates a second base station correlated with one of the two or more first base stations, and temporarily suspends the radio communication in accordance with a first communications standard to issue, to a mobile station, a request of measurement for the designated second base station. The first base station receives a result of the measurement for the designated second base station. The first base station notifies the mobile station of a handover from the first communications standard to a second communications standard, and also notifies the mobile station of a request for starting a coordination mode in which the two or more second base stations including the designated second base station establish communication with the mobile station in coordination with each other.Type: GrantFiled: May 30, 2011Date of Patent: December 15, 2015Assignee: SHARP KABUSHIKI KAISHAInventors: Mitsuru Sakamoto, Akira Ohshima, Tadashi Shimonabe, Yuhsuke Takagi, Takashi Naito
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Publication number: 20150050941Abstract: A wireless communication system, a communication method, a base station, and a communication terminal are provided. The wireless communication system includes a base station, and a communication terminal that can communicate with the base station through a plurality of frequency bands. The wireless communication system includes a first notification module provided at one of the base station and communication terminal for notifying the other of the base station and communication terminal of a switching preparation request when a state is detected in which the frequency band used as the main frequency band among the plurality of frequency bands is to be switched, and a second notification module that notifies one of the base station and communication terminal of frequency band switching preparation completion in response to a determination of being in a state in which the frequency band used as the main frequency band is to be switched.Type: ApplicationFiled: February 15, 2013Publication date: February 19, 2015Inventors: Shinichi Sawada, Tadashi Shimonabe, Shigeto Suzuki, Kouki Suzuki, Mitsuru Sakamoto, Yuhsuke Takagi, Shumpei Fuse, Akio Yoshihara
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Publication number: 20150043550Abstract: A radio communication system includes transmission/reception devices which perform communication by dynamically switching a first transmission mode and a second transmission mode having a lower quality than the first transmission mode, wherein the transmission/reception devices have a transmission mode decision means which fixes a transmission mode upon communication to the first transmission mode for a given period of time.Type: ApplicationFiled: October 24, 2014Publication date: February 12, 2015Inventors: Shigeto Suzuki, Keiji Hikoso, Mitsuru Sakamoto, Yuhsuke Takagi, Tadashi Shimonabe, Akira Ohshima
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Publication number: 20150030000Abstract: A wireless communication system allows a handover operation to a base station communicating through a plurality of frequency bands. The mobile terminal includes a communication unit adapted to perform communication with any of the base stations through a plurality of frequency bands. The communication unit of the base station notifies, when communication through a plurality of frequency bands is possible, a mobile terminal about information directed to identifying a main frequency band from relevant frequency bands in a manner allowing discrimination from one or more frequency bands other than the main frequency band. The communication unit of the mobile terminal determines that, upon receiving information directed to identifying a main frequency band from the second base station during having communication connection with the first base station, that the frequency band identified by the relevant information is a subject of handover towards the second base station.Type: ApplicationFiled: February 6, 2013Publication date: January 29, 2015Inventors: Kouki Suzuki, Shinichi Sawada, Tadashi Shimonabe, Shigeto Suzuki, Mitsuru Sakamoto, Yuhsuke Takagi, Akio Yoshihara, Shumpei Fuse
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Patent number: 8892161Abstract: A radio communication system includes transmission/reception devices which perform communication by dynamically switching a first transmission mode and a second transmission mode having a lower quality than the first transmission mode, wherein the transmission/reception devices have a transmission mode decision means which fixes a transmission mode upon communication to the first transmission mode for a given period of time.Type: GrantFiled: January 16, 2009Date of Patent: November 18, 2014Assignee: Huawei Technologies Co., Inc.Inventors: Shigeto Suzuki, Keiji Hikoso, Mitsuru Sakamoto, Yuhsuke Takagi, Tadashi Shimonabe, Akira Ohshima
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Patent number: 8768362Abstract: A communication system includes: a determination unit, provided in any one of a first base station, a second base station, and a mobile station, which determines a transmission timing change amount on the basis of reception timing of a signal transmitted between the first or second base station and the mobile station. The mobile station includes a handover execution unit which performs a handover from the first base station to the second base station on the basis of the transmission timing change amount calculated by the determination unit.Type: GrantFiled: May 28, 2010Date of Patent: July 1, 2014Assignee: Sharp Kabushiki KaishaInventors: Tadashi Shimonabe, Akira Ohshima, Mitsuru Sakamoto, Yuhsuke Takagi
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Patent number: 8724551Abstract: It is possible to complete a re-connection in a short time and prevent instantaneous interruption of communication by including a plurality of base station apparatuses and a mobile station apparatus; the mobile station apparatus includes: a delay difference detecting unit that detects a difference in reception timing between a signal from the base station apparatus with which the mobile station apparatus currently communicates and a signal from the base station apparatus that is a re-connection destination candidate; a transmission timing calculating unit that calculates, based on the difference in reception timing, a transmission timing to the base station apparatus that is the re-connection destination candidate; and a re-connection processing unit that, having detected a disconnection of the communication with the base station apparatus with which the mobile station apparatus currently communicates, uses the transmission timing to start a communication with the base station apparatus that is the re-connectType: GrantFiled: November 2, 2010Date of Patent: May 13, 2014Assignee: Sharp Kabushiki KaishaInventors: Akira Ohshima, Tadashi Shimonabe, Mitsuru Sakamoto, Yuhsuke Takagi
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Patent number: 8716762Abstract: Disclosed are: a biosensor kit in which a bionsensor utilizing a field effect transistor is not deteriorated during storage or transport; and a system for detecting a substance of interest, which is equipped with the biosensor chip. The biosensor kit comprises a biosensor chip which can measure a substance of interest quantitatively and a package which can hermetically seal the biosensor chip and is composed of a packaging material comprising a metal film. The biosensor chip can measure the substance quantitatively based on the value of a current generated in a field effect transistor when the substance is reacted with a molecule that can recognize the substance and is immobilized on a reaction field connected to the field effect transistor. The biosensor chip comprises the field effect transistor and a mounting substrate on which the field effect transistor is mounted.Type: GrantFiled: March 15, 2011Date of Patent: May 6, 2014Assignee: Mitsumi Electric Co., Ltd.Inventors: Mitsuru Sakamoto, Hirohiko Urushiyama, Hiroaki Kikuchi, Tomoaki Yamabayashi
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Patent number: 8710554Abstract: Disclosed are: a biosensor kit in which a biosensor utilizing a field effect transistor is not deteriorated during storage or transport; and a system for detecting a substance of interest, which is equipped with the biosensor chip. The biosensor kit comprises a biosensor chip which can measure a substance of interest quantitatively and a package which can hermetically seal the biosensor chip and is composed of a packaging material comprising a metal film. The biosensor chip can measure the substance quantitatively based on the value of a current generated in a field effect transistor when the substance is reacted with a molecule that can recognize the substance and is immobilized on a reaction field connected to the field effect transistor. The biosensor chip comprises the field effect transistor and a mounting substrate on which the field effect transistor is mounted.Type: GrantFiled: September 19, 2013Date of Patent: April 29, 2014Assignee: Mitsumi Electric, Co., Ltd.Inventors: Mitsuru Sakamoto, Hirohiko Urushiyama, Hiroaki Kikuchi, Tomoaki Yamabayashi
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Publication number: 20140017146Abstract: Disclosed are: a biosensor kit in which a biosensor utilizing a field effect transistor is not deteriorated during storage or transport; and a system for detecting a substance of interest, which is equipped with the biosensor chip. The biosensor kit comprises a biosensor chip which can measure a substance of interest quantitatively and a package which can hermetically seal the biosensor chip and is composed of a packaging material comprising a metal film. The biosensor chip can measure the substance quantitatively based on the value of a current generated in a field effect transistor when the substance is reacted with a molecule that can recognize the substance and is immobilized on a reaction field connected to the field effect transistor. The biosensor chip comprises the field effect transistor and a mounting substrate on which the field effect transistor is mounted.Type: ApplicationFiled: September 19, 2013Publication date: January 16, 2014Applicant: MITSUMI ELECTRIC CO., LTD.Inventors: Mitsuru SAKAMOTO, Hirohiko URUSHIYAMA, Hiroaki KIKUCHI, Tomoaki YAMABAYASHI
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Patent number: 8437787Abstract: A mobile communication device includes antennas, transmitting units, and receiving units. A baseband processing unit of the mobile communication device transmits data signals to a base station device through a receiving unit and an antenna that are selected based on an instruction received from the base station device. The baseband processing unit transmits reference signals to the base station device through the transmitting units and the antennas while preventing transmission frequencies of the reference signals from overlapping one another.Type: GrantFiled: May 22, 2009Date of Patent: May 7, 2013Assignee: Sharp Kabushiki KaishaInventors: Tadashi Shimonabe, Akira Ohshima, Mitsuru Sakamoto, Yuhsuke Takagi
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Publication number: 20130069381Abstract: This invention is to provide a carrying case for a portable electronic terminal device such as a tablet media player or a tablet media computer having a constitution which can be held by a hand, and thus, a carrying case according to the present invention comprises a mounting main body for mounting and fixing a portable electronic terminal device having a screen with a specific size which is an information displaying screen and a touch input screen, a handle portion rotatably held to said mounting main body; and an arm portion fixed on said handle portion and holding a hand or an arm of a user between the handle portion and itself.Type: ApplicationFiled: May 18, 2011Publication date: March 21, 2013Applicant: JB TRUST INC.Inventor: Mitsuru Sakamoto
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Publication number: 20130028789Abstract: Disclosed are: a biosensor kit in which a bionsensor utilizing a field effect transistor is not deteriorated during storage or transport; and a system for detecting a substance of interest, which is equipped with the biosensor chip. The biosensor kit comprises a biosensor chip which can measure a substance of interest quantitatively and a package which can hermetically seal the biosensor chip and is composed of a packaging material comprising a metal film. The biosensor chip can measure the substance quantitatively based on the value of a current generated in a field effect transistor when the substance is reacted with a molecule that can recognize the substance and is immobilized on a reaction field connected to the field effect transistor. The biosensor chip comprises the field effect transistor and a mounting substrate on which the field effect transistor is mounted.Type: ApplicationFiled: March 15, 2011Publication date: January 31, 2013Inventors: Mitsuru Sakamoto, Hirohiko Urushiyama, Hiroaki Kikuchi, Tomoaki Yamabayashi
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Publication number: 20130017833Abstract: During a period of parallel-like radio communication with two or more first base stations, the first base station designates a second base station correlated with one of the two or more first base stations, and temporarily suspends the radio communication in accordance with a first communications standard to issue, to a mobile station, a request of measurement for the designated second base station. The first base station receives a result of the measurement for the designated second base station. The first base station notifies the mobile station of a handover from the first communications standard to a second communications standard, and also notifies the mobile station of a request for starting a coordination mode in which the two or more second base stations including the designated second base station establish communication with the mobile station in coordination with each other.Type: ApplicationFiled: May 30, 2011Publication date: January 17, 2013Applicant: SHARP KABUSHIKI KAISHAInventors: Mitsuru Sakamoto, Akira Ohshima, Tadashi Shimonabe, Yuhsuke Takagi, Takashi Naito
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Publication number: 20120218946Abstract: It is possible to complete a re-connection in a short time and prevent instantaneous interruption of communication by including a plurality of base station apparatuses and a mobile station apparatus; the mobile station apparatus includes: a delay difference detecting unit that detects a difference in reception timing between a signal from the base station apparatus with which the mobile station apparatus currently communicates and a signal from the base station apparatus that is a re-connection destination candidate; a transmission timing calculating unit that calculates, based on the difference in reception timing, a transmission timing to the base station apparatus that is the re-connection destination candidate; and a re-connection processing unit that, having detected a disconnection of the communication with the base station apparatus with which the mobile station apparatus currently communicates, uses the transmission timing to start a communication with the base station apparatus that is the re-connectType: ApplicationFiled: November 2, 2010Publication date: August 30, 2012Inventors: Akira Ohshima, Tadashi Shimonabe, Mitsuru Sakamoto, Yuhsuke Takagi
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Publication number: 20120100885Abstract: A communication system includes: a determination unit, provided in any one of a first base station, a second base station, and a mobile station, which determines a transmission timing change amount on the basis of reception timing of a signal transmitted between the first or second base station and the mobile station. The mobile station includes a handover execution unit which performs a handover from the first base station to the second base station on the basis of the transmission timing change amount calculated by the determination unit.Type: ApplicationFiled: May 28, 2010Publication date: April 26, 2012Inventors: Tadashi Shimonabe, Akira Ohshima, Mitsuru Sakamoto, Yuhsuke Takagi
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Publication number: 20110081930Abstract: A mobile communication device includes antennas, transmitting units, and receiving units. A baseband processing unit of the mobile communication device transmits data signals to a base station device through a receiving unit and an antenna that are selected based on an instruction received from the base station device. The baseband processing unit transmits reference signals to the base station device through the transmitting units and the antennas while preventing transmission frequencies of the reference signals from overlapping one another.Type: ApplicationFiled: May 22, 2009Publication date: April 7, 2011Inventors: Tadashi Shimonabe, Akira Ohshima, Mitsuru Sakamoto, Yuhsuke Takagi
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Publication number: 20100310005Abstract: A mobile communication device includes a plurality of antennas which transmits and receives a radio signal, and a baseband processor which selects a transmission antenna used for data signal transmission from the plurality of antennas based on an instruction from a base station device and transmits a data signal using the transmission antenna, wherein the baseband processor determines a timing when a reference signal is transmitted using a standby antenna not used for data signal transmission based on the likelihood of the transmission antenna being switched and transmits the reference signal based on the determined timing.Type: ApplicationFiled: February 2, 2009Publication date: December 9, 2010Inventors: Yuhsuke Takagi, Keiji Hikoso, Mitsuru Sakamoto, Tadashi Shimonabe, Akira Ohshima
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Publication number: 20100291918Abstract: A radio communication system includes transmission/reception devices which perform communication by dynamically switching a first transmission mode and a second transmission mode having a lower quality than the first transmission mode, wherein the transmission/reception devices have a transmission mode decision means which fixes a transmission mode upon communication to the first transmission mode for a given period of time.Type: ApplicationFiled: January 16, 2009Publication date: November 18, 2010Inventors: Shigeto Suzuki, Keiji Hikoso, Mitsuru Sakamoto, Yuhsuke Takagi, Tadashi Shimonabe, Akira Ohshima