Patents by Inventor Nozomi HASHIMOTO

Nozomi HASHIMOTO 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).

  • Communication system and network relay device
    Patent number: 9385971
    Abstract: In a multi-chassis link-aggregation device, each of first and second switch devices is provided with a relay condition, which defines prohibition of a predetermined relay path. If there is no link failure in each multi-chassis link-aggregation device, each of the first and second switch devices prohibits forwarding of a frame, which has been received by a bridge port, from each multi-chassis link-aggregation device. On the other hand, if a link failure is present in a second port (second multi-chassis link-aggregation device) of the first and second switch devices permits forwarding of the frame, which has been received by the bridge port, from the second port. In this case, if a destination port of the frame received by a first port includes the second multi-chassis link-aggregation device, the first switch device adds a port identifier representing the received port to the frame and forwards that toward the second switch device.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: July 5, 2016
    Assignee: Hitachi Metals, Ltd.
    Inventors: Nozomi Hashimoto, Wataru Kumagai
  • Communication System and Network Relay Device
    Publication number: 20140226461
    Abstract: In a multi-chassis link-aggregation device, each of first and second switch devices is provided with a relay condition, which defines prohibition of a predetermined relay path. If there is no link failure in each multi-chassis link-aggregation device, each of the first and second switch devices prohibits forwarding of a frame, which has been received by a bridge port, from each multi-chassis link-aggregation device. On the other hand, if a link failure is present in a second port (second multi-chassis link-aggregation device) of the first and second switch devices permits forwarding of the frame, which has been received by the bridge port, from the second port. In this case, if a destination port of the frame received by a first port includes the second multi-chassis link-aggregation device, the first switch device adds a port identifier representing the received port to the frame and forwards that toward the second switch device.
    Type: Application
    Filed: December 23, 2013
    Publication date: August 14, 2014
    Applicant: Hitachi Metals, Ltd.
    Inventors: Nozomi HASHIMOTO, Wataru KUMAGAI