Patents by Inventor Toshiyuki Odaka

Toshiyuki Odaka 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).

  • Patent number: 9503212
    Abstract: Provided is a station-side apparatus configured to conduct optical communication with a plurality of subscriber apparatuses via a plurality of wavelengths. The station-side apparatus includes a storage apparatus, management information stored in the storage apparatus and configured to indicate whether or not a subscriber apparatus is a first apparatus whose wavelength used for communication is changed to another wavelength, and a transmission unit configured to transmit downlink frames addressed to the plurality of subscriber apparatuses in an order of transmission determined based on the management information.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: November 22, 2016
    Assignee: Hitachi, Ltd.
    Inventors: Jun Sugawa, Toshiyuki Odaka
  • Patent number: 9391734
    Abstract: Provided is a network system including a subscriber apparatus and a station-side apparatus connected with the subscriber apparatus via an optical line. The subscriber apparatus includes a transceiver for receiving an instruction to change wavelengths for signals to be sent and received, receiving a downstream signal sent from the station-side apparatus and having a wavelength designated by the instruction, and sending an upstream signal having a wavelength designated by the instruction to the station-side apparatus. The subscriber apparatus includes a controller for identifying at least one property of the received downstream signal and determining wavelengths for signals to be sent and received based on the identified at least one property.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: July 12, 2016
    Assignee: Hitachi, Ltd.
    Inventors: Jun Sugawa, Toshiyuki Odaka
  • Patent number: 9225424
    Abstract: In a PON system in which plural kinds of modulation schemes coexist, when uplink burst signals from respective ONUs are received, the receiving efficiency degrades as the number of the times of switching of the modulation scheme increases. In an optical access (PON) system supporting plural kinds of modulation schemes, an OLT allocates bandwidths for uplink signals, i.e., transmission timings each including a transmission start time and a transmission duration, to ONUs, respectively, such that the bandwidths allocated to plural ONUs for the same modulation scheme are as successive as possible. Based on the transmission timings allocated to the respective ONUs, the OLT switches the modulation scheme of a modulation-scheme variable burst-mode optical transmitter/receiver by control of a modulation scheme controller.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: December 29, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Toshiyuki Odaka, Jun Sugawa, Hidehiro Toyoda
  • Publication number: 20150229431
    Abstract: Provided is a station-side apparatus configured to conduct optical communication with a plurality of subscriber apparatuses via a plurality of wavelengths. The station-side apparatus includes a storage apparatus, management information stored in the storage apparatus and configured to indicate whether or not a subscriber apparatus is a first apparatus whose wavelength used for communication is changed to another wavelength, and a transmission unit configured to transmit downlink frames addressed to the plurality of subscriber apparatuses in an order of transmission determined based on the management information.
    Type: Application
    Filed: December 18, 2014
    Publication date: August 13, 2015
    Inventors: Jun SUGAWA, Toshiyuki ODAKA
  • Patent number: 8965206
    Abstract: An aspect of this invention is a network system including subscriber apparatuses and a station-side apparatus for communicating with the subscriber apparatuses. The station-side apparatus communicates with the subscriber apparatuses using wavelengths. The station-side apparatus determines a wavelength to be used by each of at least one subscriber apparatus of the subscriber apparatuses based on effective transmission rates used by the subscriber apparatuses in communications with the station-side apparatus.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: February 24, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Jun Sugawa, Toshiyuki Odaka, Hidehiro Toyoda
  • Publication number: 20150037035
    Abstract: Provided is a network system including a subscriber apparatus and a station-side apparatus connected with the subscriber apparatus via an optical line. The subscriber apparatus includes a transceiver for receiving an instruction to change wavelengths for signals to be sent and received, receiving a downstream signal sent from the station-side apparatus and having a wavelength designated by the instruction, and sending an upstream signal having a wavelength designated by the instruction to the station-side apparatus. The subscriber apparatus includes a controller for identifying at least one property of the received downstream signal and determining wavelengths for signals to be sent and received based on the identified at least one property.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 5, 2015
    Inventors: Jun SUGAWA, Toshiyuki ODAKA
  • Publication number: 20140294388
    Abstract: In a PON system in which plural kinds of modulation schemes coexist, when uplink burst signals from respective ONUs are received, the receiving efficiency degrades as the number of the times of switching of the modulation scheme increases. In an optical access (PON) system supporting plural kinds of modulation schemes, an OLT allocates bandwidths for uplink signals, i.e., transmission timings each including a transmission start time and a transmission duration, to ONUs, respectively, such that the bandwidths allocated to plural ONUs for the same modulation scheme are as successive as possible. Based on the transmission timings allocated to the respective ONUs, the OLT switches the modulation scheme of a modulation-scheme variable burst-mode optical transmitter/receiver by control of a modulation scheme controller.
    Type: Application
    Filed: October 29, 2013
    Publication date: October 2, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Toshiyuki ODAKA, Jun SUGAWA, Hidehiro TOYODA
  • Publication number: 20140161456
    Abstract: An aspect of this invention is a network system including subscriber apparatuses and a station-side apparatus for communicating with the subscriber apparatuses. The station-side apparatus communicates with the subscriber apparatuses using wavelengths. The station-side apparatus determines a wavelength to be used by each of at least one subscriber apparatus of the subscriber apparatuses based on effective transmission rates used by the subscriber apparatuses in communications with the station-side apparatus.
    Type: Application
    Filed: March 4, 2013
    Publication date: June 12, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Jun SUGAWA, Toshiyuki ODAKA, Hidehiro TOYODA
  • Patent number: 8671136
    Abstract: A data retrieval method for sensing data for retrieving, from user terminals, data transmitted from a plurality of sensor nodes, the data retrieval method including: a step for storing in distributed servers the data sent from the plurality of sensor nodes, a step for setting information link pointers for indicating model names previously set and link pointers of data corresponding to the model names, a step for a management server connected through a network with the distributed servers and the user terminal to accept the reference requests for data acquired from the user terminals, and a step for the management server to acquire data from the distributed servers set as the information link pointers based on the data reference request from among the data stored in the distributed servers and to respond to the user terminal.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: March 11, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Norihiko Moriwaki, Toshiyuki Odaka
  • Patent number: 8629907
    Abstract: A transmit-side transmission control device for sending data generated by a data generator device to a data utilization point receives and retains notification of the allowable data transmission quantity from a receive-side transmission control device, and adjusts the data quantity sent from the data generator device so as to fit within that allowable data transmission quantity range, and/or when a request is issued to change that data transmission quantity, the receive-side transmission control device is notified of that allowable data transmission quantity change request.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: January 14, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Toshiyuki Odaka, Kunihiko Toumura, Mariko Nakayama, Atsushi Hiroike, Tatsuhiko Kagehiro
  • Patent number: 8438249
    Abstract: A sensor-Net system includes sensor nodes which are in intermittent operation so as to save power by repeating activated state and inactivated state at a regular interval. Synchronization of time in the system is executed by aligning to the intermittent operation of the sensor nodes. A management server issues a setTime command for configuring the time to each gateway node at a specified interval. Each router node sets or corrects the time of it based on the time received from the gateway node and thereafter turns ON the time configuration flag for each sensor node in order to expand the setTime command to all of its sibling sensor nodes. The router node, upon reception of a polling, which is a command request, from the sensor node, obtains the time at that time, then uses the time to generate a setTime command to transmit to that sensor node.
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: May 7, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Takehiro Urano, Keiro Muro, Toshiyuki Odaka, Minoru Ogushi, Yoshihiro Wakisaka
  • Patent number: 8345668
    Abstract: The video receiving device delivers reproducible video streams by synchronizing video images. The video delivering device determines the delivery time for each RTP packet based on the time information for plural video streams corresponding to plural contents, adds the determined delivery time (timestamp) to each RTP packet, and delivers RTP packets by using the counter common among plural contents. The video relaying device corrects the transfer timing for RTP packets based on the counter common among plural contents and the delivery time (timestamp) and sends them to the video receiving device. The video receiving device plays back the video images from the received RTP packets.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: January 1, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Mariko Nakayama, Toshiyuki Odaka
  • Patent number: 8224616
    Abstract: In a sensor network system comprising a sensor terminal and a management server, the sensor terminal transmits observation data acquired using the sensor, the management server has a latest data storage manager which manages the latest observation data among observation data received from the sensor terminal, a history data storage manager which manages the history of the observation data from any time when data was received from the sensor terminal to the latest observation data, and a missing data manager which manages missing history data, and compensates the missing history data based on a predetermined rule, and when a request for such observation data is received, at least one of the latest observation data managed by the latest data storage manager, and history data wherein the missing data has been compensated and managed by the history data storage manager, is output according to the type of request.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: July 17, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Toshiyuki Odaka, Keiro Muro, Minoru Ogushi, Kei Suzuki, Shoji Suzuki
  • Publication number: 20110196955
    Abstract: In a sensor network system comprising a sensor terminal and a management server, the sensor terminal transmits observation data acquired using the sensor, the management server has a latest data storage manager which manages the latest observation data among observation data received from the sensor terminal, a history data storage manager which manages the history of the observation data from any time when data was received from the sensor terminal to the latest observation data, and a missing data manager which manages missing history data, and compensates the missing history data based on a predetermined rule, and when a request for such observation data is received, at least one of the latest observation data managed by the latest data storage manager, and history data wherein the missing data has been compensated and managed by the history data storage manager, is output according to the type of request.
    Type: Application
    Filed: April 19, 2011
    Publication date: August 11, 2011
    Applicant: HITACHI, LTD.
    Inventors: Toshiyuki Odaka, Keiro Muro, Minoru Ogushi, Kei Suzuki, Shoji Suzuki
  • Publication number: 20110182196
    Abstract: A network system includes one or more terminals which transmit acquired data to a first network, a network interconnection device which is connected to the terminal via the first network and which receives the data from the terminal, and a management server which is connected to the network interconnection device via a second network and which receives the data from the network interconnection device; the terminal transmits the same data to the network interconnection device via the first network by a frequency corresponding to redundancy; the data contains the priority according to the contents of the data; and the network interconnection device acquires the communication quality of the second network and instructs the terminal to transmit the data according to redundancy determined based upon the acquired communication quality and the priority.
    Type: Application
    Filed: January 7, 2011
    Publication date: July 28, 2011
    Inventors: Shoji YUNOKI, May Takada, Toshiyuki Odaka, Masayuki Miyazaki, Tsutomu Yamada
  • Patent number: 7986243
    Abstract: A network system including: a first sensor device which includes a first sensor unit which detects an action of a detection object; and a first transmission unit which transmits first data regarding the action and first identification information to a server via a first base station: a second sensor device which includes; a second sensor unit which obtains sensing data; and a second transmission unit which transmits second data including the sensing data and second identification information to the server via a second base station; wherein the server is configured to: associate the first and second data based on the detection of the action; to access predetermined normal data correlating data; and, detect an abnormal condition if a combination of the action detected via the first sensor unit and the sensing data obtained by the second sensor unit conflict with the correlated normal data.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: July 26, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Yoshihiro Wakisaka, Shunzo Yamashita, Toshiyuki Odaka, Norio Ohkubo
  • Patent number: 7982603
    Abstract: In order to easily provide data successively generated from a real world sensor network in a time series to a user, a unit for generally and flexibly performing mapping between a source for generating physical electronic information (for example, a tiny sensor node) and sensing data to be provided to the user is provided. Therefore, a manager of the sensor network is composed of a device management table for mapping among a wireless sensor node, a wireless base station, and a data managing server, a real world model table capable of including device information and giving plural attributes, a registration/search processing unit for registering/searching that information, and a data manager for data mapping between the tables.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Norihiko Moriwaki, Toshiyuki Odaka, Kazuo Yano
  • Patent number: 7953571
    Abstract: In a sensor network system comprising a sensor terminal and a management server, the sensor terminal transmits observation data acquired using the sensor, the management server has a latest data storage manager which manages the latest observation data among observation data received from the sensor terminal, a history data storage manager which manages the history of the observation data from any time when data was received from the sensor terminal to the latest observation data, and a missing data manager which manages missing history data, and compensates the missing history data based on a predetermined rule, and when a request for such observation data is received, at least one of the latest observation data managed by the latest data storage manager, and history data wherein the missing data has been compensated and managed by the history data storage manager, is output according to the type of request.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: May 31, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Toshiyuki Odaka, Keiro Muro, Minoru Ogushi, Kei Suzuki, Shoji Suzuki
  • Patent number: 7831283
    Abstract: A plural-data transmission Start message is transmitted prior to transmission of plural data to an intermittent operation type wireless communications terminal, and when transmission of plural data is completed, a plural-data transmission End message is transmitted. The terminal which received the plural-data transmission Start message can change over the sleep period of the aforesaid intermittent operation to a shorter sleep period. Thereby, an improvement in the response performance in the case of plural-data delivery can be simultaneously obtained while maintaining the low power performance of a sensor node.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: November 9, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Minoru Ogushi, Keiro Muro, Toshiyuki Odaka, Kei Suzuki, Shoji Suzuki
  • Publication number: 20100194894
    Abstract: A transmit-side transmission control device for sending data generated by a data generator device to a data utilization point receives and retains notification of the allowable data transmission quantity from a receive-side transmission control device, and adjusts the data quantity sent from the data generator device so as to fit within that allowable data transmission quantity range, and/or when a request is issued to change that data transmission quantity, the receive-side transmission control device is notified of that allowable data transmission quantity change request.
    Type: Application
    Filed: February 1, 2010
    Publication date: August 5, 2010
    Applicant: HITACHI, LTD.
    Inventors: Toshiyuki ODAKA, Kunihiko TOUMURA, Mariko NAKAYAMA, Atsushi HIROIKE, Tatsuhiko KAGEHIRO