Patents by Inventor Tomohiko Kohno

Tomohiko Kohno 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 device, communication system, and communication fault detection method
    Patent number: 8937869
    Abstract: The communication device has a frame transfer unit that executes frame transfer via the first communication link and the second communication link, a link confirmation frame sending unit, and a return link confirmation frame monitoring unit. The link confirmation frame sending unit causes the frame transfer processing unit to send a link confirmation frame for use in confirming a normal link status via the first communication link from the communication device to the counterpart communication device. The return link confirmation frame monitoring unit performs fault detection of the first and second communication links by monitoring a return link confirmation frame which is to be returned from the counterpart communication device to the communication device via the second communication link when the counterpart communication device receives the link confirmation frame via the first communication link.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: January 20, 2015
    Assignee: ALAXALA Networks Corporation
    Inventors: Shinichi Akahane, Teruo Kaganoi, Tomohiko Kohno, Kazuo Sugai
  • COMMUNICATION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION FAULT DETECTION METHOD
    Publication number: 20120026894
    Abstract: The communication device has a frame transfer unit that executes frame transfer via the first communication link and the second communication link, a link confirmation frame sending unit, and a return link confirmation frame monitoring unit. The link confirmation frame sending unit causes the frame transfer processing unit to send a link confirmation frame for use in confirming a normal link status via the first communication link from the communication device to the counterpart communication device. The return link confirmation frame monitoring unit performs fault detection of the first and second communication links by monitoring a return link confirmation frame which is to be returned from the counterpart communication device to the communication device via the second communication link when the counterpart communication device receives the link confirmation frame via the first communication link.
    Type: Application
    Filed: October 11, 2011
    Publication date: February 2, 2012
    Inventors: Shinichi AKAHANE, Teruo Kaganoi, Tomohiko Kohno, Kazuo Sugai
  • Communication device, communication system, and communication fault detection method
    Patent number: 8064353
    Abstract: The communication device has a frame transfer unit that executes frame transfer via the first communication link and the second communication link, a link confirmation frame sending unit, and a return link confirmation frame monitoring unit. The link confirmation frame sending unit causes the frame transfer processing unit to send a link confirmation frame for use in confirming a normal link status via the first communication link from the communication device to the counterpart communication device. The return link confirmation frame monitoring unit performs fault detection of the first and second communication links by monitoring a return link confirmation frame which is to be returned from the counterpart communication device to the communication device via the second communication link when the counterpart communication device receives the link confirmation frame via the first communication link.
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: November 22, 2011
    Assignee: ALAXALA Networks Corporation
    Inventors: Shinichi Akahane, Teruo Kaganoi, Tomohiko Kohno, Kazuo Sugai
  • COMMUNICATION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION FAULT DETECTION METHOD
    Publication number: 20090141641
    Abstract: The communication device has a frame transfer unit that executes frame transfer via the first communication link and the second communication link, a link confirmation frame sending unit, and a return link confirmation frame monitoring unit. The link confirmation frame sending unit causes the frame transfer processing unit to send a link confirmation frame for use in confirming a normal link status via the first communication link from the communication device to the counterpart communication device. The return link confirmation frame monitoring unit performs fault detection of the first and second communication links by monitoring a return link confirmation frame which is to be returned from the counterpart communication device to the communication device via the second communication link when the counterpart communication device receives the link confirmation frame via the first communication link.
    Type: Application
    Filed: July 23, 2008
    Publication date: June 4, 2009
    Inventors: Shinichi Akahane, Teruo Kaganoi, Tomohiko Kohno, Kazuo Sugai
  • DATA TRANSFER DEVICE FOR RING PROTOCOL HIGH SPEED SWITCHING AND METHOD FOR THE SAME
    Publication number: 20090103554
    Abstract: The present invention provides a data transfer device. This data transfer device comprises a number n (where n is an integer equal to 2 or greater) of transfer resources functioning as nodes of ring networks and connection lines connecting a number m (where m is an integer equal to 2 or greater) of ring networks and the number n of transfer resources. The connection lines are configured to be capable to connect at least some of the m ring networks and at least some of the n transfer resources. A controller controls transfer resource specified among at least some of the transfer resources to manage at least some of m number of ring networks.
    Type: Application
    Filed: February 8, 2008
    Publication date: April 23, 2009
    Inventors: Shinichi Akahane, Yasuhiro Kodama, Tomohiko Kohno, Tetsuya Nagata