Patents by Inventor Yasushi Sasakawa

Yasushi Sasakawa 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).

  • Method for preventing control packet looping and bridge apparatus using the method
    Patent number: 8582467
    Abstract: A method for preventing a control packet loop in a network realizing node redundancy or circuit redundancy based on a rapid spanning tree protocol or a multiple spanning tree protocol is disclosed. The method includes the steps of: detecting a loop of a control packet of the rapid spanning tree protocol or the multiple spanning tree protocol; and discarding the control packet by which the loop is detected so as to prevent occurrence of the loop of the control packet.
    Type: Grant
    Filed: December 28, 2004
    Date of Patent: November 12, 2013
    Assignee: Fujitsu Limited
    Inventors: Masaki Hirota, Kazuto Nishimura, Yasushi Sasakawa, Kou Takatori
  • Method for preventing control packet loop and bridge apparatus using the method
    Publication number: 20060007869
    Abstract: A method for preventing a control packet loop in a network realizing node redundancy or circuit redundancy based on a rapid spanning tree protocol or a multiple spanning tree protocol is disclosed. The method includes the steps of: detecting a loop of a control packet of the rapid spanning tree protocol or the multiple spanning tree protocol; and discarding the control packet by which the loop is detected so as to prevent occurrence of the loop of the control packet.
    Type: Application
    Filed: December 28, 2004
    Publication date: January 12, 2006
    Inventors: Masaki Hirota, Kazuto Nishimura, Yasushi Sasakawa, Kou Takatori