Patents by Inventor Toru Tanada

Toru Tanada 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).

  • Redundant ethernet transmission line system
    Patent number: 7161900
    Abstract: A system is disclosed to switch over redundant Ethernet transmission lines using link status control, as decreasing software intervention required for the transmission and reception of control frames, etc. The system includes Ethernet transmission lines having redundant configuration, first and second transmission equipment being connected through the Ethernet transmission lines. An Ethernet switch provided in the first transmission equipment learns a route configuration from the frames transmitted from the first and the second transmission equipment. Switchover of the active transmission line is performed using the learned information on the route configuration.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: January 9, 2007
    Assignee: Fujitsu Limited
    Inventor: Toru Tanada
  • Communication apparatus and network interfacing device
    Publication number: 20040085973
    Abstract: The invention relates to a network interfacing device and a communication apparatus that is provided in a packet routing network and accommodates a large number of VPNs. An object of the invention is to accommodate a large number of VPNs with low cost. The communication apparatus have: a plurality of interfacing sections each having a CAM and interfacing with links that are used for accommodating respective VPNs, for performing routing according to information stored in the CAM; a storage section for registering in advance therein a combination of identifiers of interfacing sections which accommodate VPNS respectively; and a controlling section for requesting an interfacing section designated by an identifier registered in the storage section in association with a VPN to which routing information is to be applied, to write the routing information into the CAM.
    Type: Application
    Filed: October 30, 2003
    Publication date: May 6, 2004
    Inventor: Toru Tanada
  • Redundant ethernet transmission line system
    Publication number: 20030035368
    Abstract: A system is disclosed to switch over redundant Ethernet transmission lines using link status control, as decreasing software intervention required for the transmission and reception of control frames, etc. The system includes Ethernet transmission lines having redundant configuration, first and second transmission equipment being connected through the Ethernet transmission lines. An Ethernet switch provided in the first transmission equipment learns a route configuration from the frames transmitted from the first and the second transmission equipment. Switchover of the active transmission line is performed using the learned information on the route configuration.
    Type: Application
    Filed: March 14, 2002
    Publication date: February 20, 2003
    Inventor: Toru Tanada