Patents by Inventor Yutaka TAKEKOSHI

Yutaka TAKEKOSHI 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).

  • Network apparatus, control method thereof, control program and packet network system
    Patent number: 9491096
    Abstract: A switching process includes an SRAM/CAM storing registration data including a forwarding database used for packet-forwarding and a DRAM storing packet data. The registration data including the forwarding database of the SRAM/CAM for packet-forwarding is stored into the DRAM as a copy of the registration data, and the registration data of the DRAM is used to refresh the registration data of the SRAM/CAM for a predetermined time interval. A data error in the SRAM/CAM caused by a soft-error is rewritten to normal data by periodical refreshing so that data is guaranteed with relatively low cost and the reliability of the network apparatus is improved.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: November 8, 2016
    Assignees: NEC CORPORATION, NEC ENGINEERING LTD.
    Inventors: Koichi Tsuchiya, Yutaka Takekoshi
  • NETWORK APPARATUS, CONTROL METHOD THEREOF, CONTROL PROGRAM AND PACKET NETWORK SYSTEM
    Publication number: 20120250680
    Abstract: A switching process includes an SRAM/CAM storing registration data including a forwarding database used for packet-forwarding and a DRAM storing packet data. The registration data including the forwarding database of the SRAM/CAM for packet-forwarding is stored into the DRAM as a copy of the registration data, and the registration data of the DRAM is used to refresh the registration data of the SRAM/CAM for a predetermined time interval. A data error in the SRAM/CAM caused by a soft-error is rewritten to normal data by periodical refreshing so that data is guaranteed with relatively low cost and the reliability of the network apparatus is improved.
    Type: Application
    Filed: March 29, 2012
    Publication date: October 4, 2012
    Applicants: NEC ENGINEERING, LTD., NEC CORPORATION
    Inventors: Koichi TSUCHIYA, Yutaka TAKEKOSHI