Patents by Inventor Jun Mizuguchi

Jun Mizuguchi 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).

  • Publication number: 20220131610
    Abstract: A network control device for generating a slice by dividing a network and allocating communication resources to the slice, the slice being a virtual network, the network control device including: a processor; and a memory to store a program which, when executed by the processor, performs processes of: obtaining and holding resource information from a network device included in the network, the resource information including information on a maximum usage rate of communication resources allocated to a previously generated slice in at least one predetermined period; and determining, upon receiving a request for generating a new slice, whether or not the requested slice can be generated on the basis of the resource information held, wherein the resource information includes information on a maximum usage rate of communication resources, which are allocated to the previously generated slice, depending on a request delay concerning the slice in the predetermined period.
    Type: Application
    Filed: January 5, 2022
    Publication date: April 28, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kenichi NAKURA, Takeshi SUEHIRO, Akiko IWASAKI, Jun MIZUGUCHI
  • Patent number: 10931562
    Abstract: A transfer device according to the present invention is a switching device that is one of transfer devices forming a network, and includes: a link state database that holds topology information of the network, and priority of the transfer device and priorities of other transfer devices forming the network to be used in path computation; a shortest path calculating unit that calculates a shortest path from a first switching device to a second switching device among the transfer devices forming the network on the basis of the topology information; and a priority adjusting unit that adjusts the priority of the transfer device on the basis of the shortest path calculated by the shortest path calculating unit and the priority of the transfer device and the priorities of the other transfer devices, wherein the priority adjusting unit adjusts the priority of the transfer device so that the number of overlaps with priority of another transfer device that is included with the transfer device in a shortest path from on
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: February 23, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Ryuma Matsushita, Yoshifumi Hotta, Jun Mizuguchi
  • Publication number: 20200127915
    Abstract: A transfer device according to the present invention is a switching device that is one of transfer devices forming a network, and includes: a link state database that holds topology information of the network, and priority of the transfer device and priorities of other transfer devices forming the network to be used in path computation; a shortest path calculating unit that calculates a shortest path from a first switching device to a second switching device among the transfer devices forming the network on the basis of the topology information; and a priority adjusting unit that adjusts the priority of the transfer device on the basis of the shortest path calculated by the shortest path calculating unit and the priority of the transfer device and the priorities of the other transfer devices, wherein the priority adjusting unit adjusts the priority of the transfer device so that the number of overlaps with priority of another transfer device that is included with the transfer device in a shortest path from on
    Type: Application
    Filed: May 16, 2016
    Publication date: April 23, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Ryuma MATSUSHITA, Yoshifumi HOTTA, Jun MIZUGUCHI
  • Patent number: 9264213
    Abstract: A time synchronization method for a communication system configured to perform protection switching, the communication system including a first network in which a master station and a slave station are connected via plural physical lines including a working line and a backup line and a second network connected to the slave station, the method including a time synchronization in which the slave station executes, when not detecting a communication failure of a downlink signal transmitted from the master station, synchronization processing for synchronizing, based on a clock of the slave station and timing information, time information transmitted to the second network with time information included in a time synchronization command and suppresses, when detecting a communication failure or receiving a switching notification from the master station apparatus, a synchronization error due to a difference between the clock of the slave station and the timing information.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: February 16, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Kozaki, Kenichi Nakura, Yoshifumi Hotta, Jun Mizuguchi
  • Patent number: 9154292
    Abstract: A communication apparatus (a slave) that performs time synchronization with a master apparatus on the basis of a time synchronization message transmitted from the master apparatus (a master) at a fixed cycle. The communication apparatus (the slave) includes a CPU that stores, in a transmission request message for requesting transmission of the time synchronization message, a requesting transmission rate, and transmits the transmission request message to the communication apparatus (the master).
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: October 6, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventor: Jun Mizuguchi
  • Patent number: 9112612
    Abstract: A relay device that relays communication between a low-speed communication device performing uplink 1 G transfer and a high-speed communication device performing uplink 10 G transfer and a station-side optical communication device, wherein the relay device includes a low-speed reception unit that converts an optical signal received from the low-speed communication device to an electric signal, a buffer that buffers the electric signal, and a high-speed transmission unit that transmits, to the station-side optical communication device, a bandwidth allocation request requesting bandwidth allocation for communication from its own unit to the station-side optical communication device, and within a transmission permitted time period allocated by the station-side optical communication device, reads an electric signal stored in the buffer, converts the electric signal to an optical signal having a communication speed of 10 G, and transmits the optical signal.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: August 18, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Jun Mizuguchi, Yoshifumi Hotta, Koshi Sugimura
  • Publication number: 20150188691
    Abstract: A communication apparatus (a slave) that performs time synchronization with a master apparatus on the basis of a time synchronization message transmitted from the master apparatus (a master) at a fixed cycle. The communication apparatus (the slave) includes a CPU that stores, in a transmission request message for requesting transmission of the time synchronization message, a requesting transmission rate, and transmits the transmission request message to the communication apparatus (the master).
    Type: Application
    Filed: November 28, 2012
    Publication date: July 2, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventor: Jun Mizuguchi
  • Patent number: 8995837
    Abstract: An ONU includes a CDR that regenerates a clock based on a signal from an OLT, an oscillator that generates an internal clock, a time stamp counter that manages a time of the ONU based on the clock in a period in which the CDR regenerates the clock and manages the time of the ONU based on the internal clock in a period in which the CDR does not regenerate the clock, an MPCP control unit that decides, when a Cyclic Sleep mode is set, a receiver-time synchronization time that is a period in which the receiver is normally operated within a sleep time, based on a difference between a time stamp value included in the signal transmitted from the OLT and a time stamp managed by the time stamp counter, and a power-saving control unit that controls the receiver to be normally operated in the receiver-time synchronization time.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: March 31, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Jun Mizuguchi, Fumihiko Tano
  • Publication number: 20130272708
    Abstract: An ONU includes a CDR that regenerates a clock based on a signal from an OLT, an oscillator that generates an internal clock, a time stamp counter that manages a time of the ONU based on the clock in a period in which the CDR regenerates the clock and manages the time of the ONU based on the internal clock in a period in which the CDR does not regenerate the clock, an MPCP control unit that decides, when a Cyclic Sleep mode is set, a receiver-time synchronization time that is a period in which the receiver is normally operated within a sleep time, based on a difference between a time stamp value included in the signal transmitted from the OLT and a time stamp managed by the time stamp counter, and a power-saving control unit that controls the receiver to be normally operated in the receiver-time synchronization time.
    Type: Application
    Filed: June 29, 2011
    Publication date: October 17, 2013
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Jun Mizuguchi, Fumihiko Tano
  • Publication number: 20130266306
    Abstract: A time synchronization method for a communication system configured to perform protection switching, the communication system including a first network in which a master station and a slave station are connected via plural physical lines including a working line and a backup line and a second network connected to the slave station, the method including a time synchronization in which the slave station executes, when not detecting a communication failure of a downlink signal transmitted from the master station, synchronization processing for synchronizing, based on a clock of the slave station and timing information, time information transmitted to the second network with time information included in a time synchronization command and suppresses, when detecting a communication failure or receiving a switching notification from the master station apparatus, a synchronization error due to a difference between the clock of the slave station and the timing information.
    Type: Application
    Filed: February 6, 2012
    Publication date: October 10, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Seiji Kozaki, Kenichi Nakura, Yoshifumi Hotta, Jun Mizuguchi
  • Publication number: 20130177314
    Abstract: A relay device that relays communication between a low-speed communication device performing uplink 1 G transfer and a high-speed communication device performing uplink 10 G transfer and a station-side optical communication device, wherein the relay device includes a low-speed reception unit that converts an optical signal received from the low-speed communication device to an electric signal, a buffer that buffers the electric signal, and a high-speed transmission unit that transmits, to the station-side optical communication device, a bandwidth allocation request requesting bandwidth allocation for communication from its own unit to the station-side optical communication device, and within a transmission permitted time period allocated by the station-side optical communication device, reads an electric signal stored in the buffer, converts the electric signal to an optical signal having a communication speed of 10 G, and transmits the optical signal.
    Type: Application
    Filed: December 27, 2010
    Publication date: July 11, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Jun Mizuguchi, Yoshifumi Hotta, Koshi Sugimura
  • Patent number: 5811279
    Abstract: A method for activating prothrombin to thrombin is presented which comprises treating an aqueous solution containing prothrombin with polyethylene glycol in the presence or absence of the calcium salt. The method enables conversion of prothrombin to thrombin in the absence of thromboplastin and allows for preparation of thrombin on an industrially large scale from easily available starting materials.
    Type: Grant
    Filed: August 1, 1997
    Date of Patent: September 22, 1998
    Assignee: Juridical Foundation The Chemo-Sero-Therapeutic Research Institute
    Inventors: Hiroshi Kaetsu, Jun Mizuguchi, Takayoshi Hamamoto