Patents by Inventor Gaku Tanabe

Gaku Tanabe 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).

  • Route confirmation method and device
    Patent number: 8018836
    Abstract: In order to preliminarily confirming whether or not a protection route to be switched over can be safely switched over during a working route being used in a unicast or multicast mode. a notification of communication confirmation/quality confirmation or multicast communication confirmation is received from a manager device is received. When the received unicast or multicast packet does not include an confirmation identifier instructed by the notification while the received unicast or multicast packet includes a destination network or multicast address instructed by the notification, the received packet is mirrored and the confirmation identifier is set in a predetermined area within a header of the packet to be transferred to a preselected protection route.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: September 13, 2011
    Assignee: Fujitsu Limited
    Inventors: Ryu Kobayashi, Gaku Tanabe, Tomonori Gotoh
  • ROUTE CONFIRMATION METHOD AND DEVICE
    Publication number: 20090190481
    Abstract: In order to preliminarily confirming whether or not a protection route to be switched over can be safely switched over during a working route being used in a unicast or multicast mode. a notification of communication confirmation/quality confirmation or multicast communication confirmation is received from a manager device is received. When the received unicast or multicast packet does not include an confirmation identifier instructed by the notification while the received unicast or multicast packet includes a destination network or multicast address instructed by the notification, the received packet is mirrored and the confirmation identifier is set in a predetermined area within a header of the packet to be transferred to a preselected protection route.
    Type: Application
    Filed: March 11, 2009
    Publication date: July 30, 2009
    Applicant: FUJITSU LIMITED
    Inventors: Ryu Kobayashi, Gaku Tanabe, Tomonori Gotoh