Patents by Inventor Shiyu GAO

Shiyu GAO 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).

  • Spectrum controller systems and methods in optical networks
    Patent number: 9577763
    Abstract: Spectrum control systems and methods are implemented to minimize power spectral density (PSD) offsets by adjusting gain of optical amplifiers in an optical section. The optical section is a logical boundary from one optical signal access point to a next adjacent optical signal access point. The systems and methods include estimating PSD offset from a given target for a peak channel at each span in the optical section, wherein the estimated PSD offset is divided at each span into two components including a self-introduced offset and an uncompensated offset from upstream; generating, for each span, a separate controller response for the self-introduced offset and the uncompensated offset from upstream; and controlling the gain of the optical amplifiers based on the separate controller response for the self-introduced offset and the uncompensated offset from upstream, for each span.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: February 21, 2017
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, David C. Bownass, David W. Boertjes, Shiyu Gao
  • SPECTRUM CONTROLLER SYSTEMS AND METHODS IN OPTICAL NETWORKS
    Publication number: 20160315711
    Abstract: Spectrum control systems and methods are implemented to minimize power spectral density (PSD) offsets by adjusting gain of optical amplifiers in an optical section. The optical section is a logical boundary from one optical signal access point to a next adjacent optical signal access point.
    Type: Application
    Filed: April 22, 2015
    Publication date: October 27, 2016
    Inventors: Choudhury A. AL SAYEED, David C. BOWNASS, David W. BOERTJES, Shiyu GAO