Patents by Inventor Koya Yasuda

Koya Yasuda 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).

  • Delay time measuring method and system of echo request/response in network, and station and program used in the same system
    Patent number: 7936700
    Abstract: There is provided a unit capable of performing calculation of delay time between a measuring station and a station to be measured by using an echo request/response frame in any block and at any time in a manner being independent from time-synchronization. To a payload portion of an OAM (Operations, Administration and Maintenance) echo request/response frame to be used for an OAM testing are added “request transmitting time” being the time at which an OAM echo request has been transmitted from the measuring station and “response receiving time” being the time at which the measuring station has received an OAM response from the station to be measured. After termination of the testing, the OAM echo request/response frame stored in a data buffer is read at arbitrary time and the request transmitting time added to the frame and response receiving time are extracted to calculate delay time between the measuring station and the station to be measured.
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: May 3, 2011
    Assignee: NEC Corporation
    Inventors: Tatsuo Yamazaki, Koya Yasuda
  • DELAY TIME MEASURING METHOD AND SYSTEM OF ECHO REQUEST/RESPONSE IN NETWORK, AND STATION AND PROGRAM USED IN THE SAME SYSTEM
    Publication number: 20090168655
    Abstract: There is provided a unit capable of performing calculation of delay time between a measuring station and a station to be measured by using an echo request/response frame in any block and at any time in a manner being independent from time-synchronization. To a payload portion of an OAM (Operations, Administration and Maintenance) echo request/response frame to be used for an OAM testing are added “request transmitting time” being the time at which an OAM echo request has been transmitted from the measuring station and “response receiving time” being the time at which the measuring station has received an OAM response from the station to be measured. After termination of the testing, the OAM echo request/response frame stored in a data buffer is read at arbitrary time and the request transmitting time added to the frame and response receiving time are extracted to calculate delay time between the measuring station and the station to be measured.
    Type: Application
    Filed: December 24, 2008
    Publication date: July 2, 2009
    Inventors: Tatsuo Yamazaki, Koya Yasuda