Patents by Inventor Toshiya Hisada
Toshiya Hisada 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: 9048888Abstract: A power line communication system is provided in which the influence of the impulsive noise unexpectedly generated on a power line which is a communication medium can be reduced according to the characteristics of the impulsive noise by an existing method and power line communication can be realized without a hindrance. A transmitter is constituted by: a modulator for conveying a LIN data signal by a power line; a filter that allows a signal of a predetermined band to pass therethrough; and a sinusoidal wave outputter (sinusoidal wave in the figure). In contrast, the receiver is constituted by the sinusoidal wave outputter, the filter and a demodulator that performs demodulation. To the power line, a limiter that limits the amplitude of the propagating signal to a predetermined amplitude (reception signal amplitude) is connected.Type: GrantFiled: October 17, 2011Date of Patent: June 2, 2015Assignees: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Daisuke Umehara, Yasuhiro Yabuuchi, Masahiro Morikura, Toshiya Hisada, Shinichi Ishiko, Satoshi Horihata, Tetsuo Morita
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Patent number: 8755387Abstract: A trunk line topology network is configured with an electronic control units being communication apparatuses transmitting and receiving data, and gateway apparatuses and a distribution apparatus being a specific gateway apparatus that are connected to a communication line being a trunk line, for relaying, through the gateway apparatuses, data transmitted among the electronic control units. The distribution apparatus includes a storage region utilized for a database. The data transmitted from the electronic control units are relayed by the gateway apparatuses and then aggregated by the distribution apparatus. The relayed data are stored once on the database. When transmitting data to the electronic control units, the distribution apparatus reads out data from the database and transmits the data at the adjusted transmission timing. The gateway apparatuses relay the transmitted data.Type: GrantFiled: October 6, 2008Date of Patent: June 17, 2014Assignees: Autonetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.Inventor: Toshiya Hisada
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Patent number: 8718124Abstract: For voltage values (observed noise sequence) in an electronic power line (communication medium) which are obtained at a predetermined interval, initial values of noise characteristics based on a statistic of the observed noise sequence itself are decided by a moment method (S301 to S307), the noise characteristics (state transition probabilities and state noise power) for maximization of the likelihood of the observed noise sequence are obtained from the initial values by MAP (Maximum A Posteriori) estimation using a Baum-Welch algorithm (S309 to S312), a state sequence is estimated from the obtained noise characteristics, and an impulsive noise at each time point is detected.Type: GrantFiled: August 27, 2013Date of Patent: May 6, 2014Assignees: Autonetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.Inventors: Daisuke Umehara, Masahiro Morikura, Toshiya Hisada, Shinichi Ishiko, Satoshi Horihata
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Publication number: 20130343445Abstract: For voltage values (observed noise sequence) in an electronic power line (communication medium) which are obtained at a predetermined interval, initial values of noise characteristics based on a statistic of the observed noise sequence itself are decided by a moment method (S301 to S307), the noise characteristics (state transition probabilities and state noise power) for maximization of the likelihood of the observed noise sequence are obtained from the initial values by MAP (Maximum A Posteriori) estimation using a Baum-Welch algorithm (S309 to S312), a state sequence is estimated from the obtained noise characteristics, and an impulsive noise at each time point is detected.Type: ApplicationFiled: August 27, 2013Publication date: December 26, 2013Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO WIRING SYSTEMS, LTD.Inventors: Daisuke UMEHARA, Masahiro MORIKURA, Toshiya HISADA, Shinichi ISHIKO, Satoshi HORIHATA
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Patent number: 8548036Abstract: For voltage values (observed noise sequence) in an electronic power line (communication medium) which are obtained at a predetermined interval, initial values of noise characteristics based on a statistic of the observed noise sequence itself are decided by a moment method (S301 to S307), the noise characteristics (state transition probabilities and state noise power) for maximization of the likelihood of the observed noise sequence are obtained from the initial values by MAP (Maximum A Posteriori) estimation using a Baum-Welch algorithm (S309 to S312), a state sequence is estimated from the obtained noise characteristics, and an impulsive noise at each time point is detected.Type: GrantFiled: June 21, 2010Date of Patent: October 1, 2013Assignees: Autonetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.Inventors: Daisuke Umehara, Masahiro Morikura, Toshiya Hisada, Shinichi Ishiko, Satoshi Horihata
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Publication number: 20130195208Abstract: A power line communication system is provided in which the influence of the impulsive noise unexpectedly generated on a power line which is a communication medium can be reduced according to the characteristics of the impulsive noise by an existing method and power line communication can be realized without a hindrance. A transmitter is constituted by: a modulator for conveying a LIN data signal by a power line; a filter that allows a signal of a predetermined band to pass therethrough; and a sinusoidal wave outputter (sinusoidal wave in the figure). In contrast, the receiver is constituted by the sinusoidal wave outputter, the filter and a demodulator that performs demodulation. To the power line, a limiter that limits the amplitude of the propagating signal to a predetermined amplitude (reception signal amplitude) is connected.Type: ApplicationFiled: October 17, 2011Publication date: August 1, 2013Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO WIRING SYSTEMS, LTD.Inventors: Daisuke Umehara, Yasuhiro Yabuuchi, Masahiro Morikura, Toshiya Hisada, Shinichi Ishiko, Satoshi Horihata, Tetsuo Morita
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Patent number: 8452481Abstract: A GW device for relaying data sent and received between a plurality of ECUs mounted in a vehicle stores data sent from the respective ECUs in a database and then timely sends the data. The database is stored in a time series in association with time information, and copies of database at a plurality of time points are sent to a central device at predetermined time intervals, or at the time of detection of occurrence of a problem.Type: GrantFiled: March 2, 2009Date of Patent: May 28, 2013Assignees: Autonetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.Inventors: Shinichi Ishiko, Toshiya Hisada
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Publication number: 20100329320Abstract: For voltage values (observed noise sequence) in an electronic power line (communication medium) which are obtained at a predetermined interval, initial values of noise characteristics based on a statistic of the observed noise sequence itself are decided by a moment method (S301 to S307), the noise characteristics (state transition probabilities and state noise power) for maximization of the likelihood of the observed noise sequence are obtained from the initial values by MAP (Maximum A Posteriori) estimation using a Baum-Welch algorithm (S309 to S312), a state sequence is estimated from the obtained noise characteristics, and an impulsive noise at each time point is detected.Type: ApplicationFiled: June 21, 2010Publication date: December 30, 2010Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Daisuke Umehara, Masahiro Morikura, Toshiya Hisada, Shinichi Ishiko, Satoshi Horihata
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Publication number: 20100332072Abstract: A GW device for relaying data sent and received between a plurality of ECUs mounted in a vehicle stores data sent from the respective ECUs in a database and then timely sends the data. The database is stored in a time series in association with time information, and copies of database at a plurality of time points are sent to a central device at predetermined time intervals, or at the time of detection of occurrence of a problem.Type: ApplicationFiled: March 2, 2009Publication date: December 30, 2010Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Shinichi Ishiko, Toshiya Hisada
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Publication number: 20100215043Abstract: A trunk line topology network is configured with: ECUs 1, 1, . . . being communication apparatuses transmitting and receiving data; and GW apparatuses 3a, 3b and a distribution apparatus 4 being a specific GW apparatus 4 that are connected to a communication line 5 being a trunk line, for relaying, through the GW apparatuses, data transmitted among the ECUs 1, 1, . . . . The distribution apparatus 4 includes a storage region utilized for a database DB. The data transmitted from the ECUs 1, 1, . . . are relayed by the GW apparatuses 3a, 3b and then aggregated by the distribution apparatus 4. The relayed data are stored once on the database DB. When transmitting data to the ECUs 1, 1, . . . , the distribution apparatus 4 reads out data from the database DB and transmits the data at the adjusted transmission timing. The GW apparatuses 3a, 3b relay the transmitted data.Type: ApplicationFiled: October 6, 2008Publication date: August 26, 2010Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventor: Toshiya Hisada