Patents by Inventor Sam Sigarto

Sam Sigarto 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).

  • EFCI scheme with early congestion detection
    Publication number: 20050025052
    Abstract: An adjustable bit rate (ABR) feedback control scheme is provided where the effects of multiloop delays and high priority traffic transmission are built into the control model. The data traffic is filtered by a low pass filter. Then, the low frequency bandwidth of the filtered traffic is measured and compared to a predetermined threshold. If the measured value exceeds the threshold, the ABR traffic flow is reduced. If the measured value is less than the threshold, the ABR traffic flow is increased. In addition, a General Prediction Control (GPC) method may be applied to the control model for optimal performance. An object of the invention is to minimize the unused link capacity subject to no congestion, where the ABR traffic is adapted to the low frequency variation of high priority traffic flow for high efficiency.
    Type: Application
    Filed: August 20, 2004
    Publication date: February 3, 2005
    Applicants: SBC Technology Resources, Inc., University of Texas at Austin
    Inventors: Yongdong Zhao, San-Qi Li, Sam Sigarto
  • Apparatus and method for congestion control in high speed networks
    Patent number: 6826151
    Abstract: An adjustable bit rate (ABR) feedback control scheme is provided where the effects of multiloop delays and high priority traffic transmission are built into the control model. The data traffic is filtered by a low pass filter. Then, the low frequency bandwidth of the filtered traffic is measured and compared to a predetermined threshold. If the measured value exceeds the threshold, the ABR traffic flow is reduced. If the measured value is less than the threshold, the ABR traffic flow is increased. In addition, a General Prediction Control (GPC) method may be applied to the control model for optimal performance. An object of the invention is to minimize the unused link capacity subject to no congestion, where the ABR traffic is adapted to the low frequency variation of high priority traffic flow for high efficiency.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: November 30, 2004
    Assignees: SBC Technology Resources, Inc., University of Texas at Austin, Texas
    Inventors: San-Qi Li, Sam Sigarto
  • Apparatus and method for congestion control in high speed networks
    Patent number: 6144639
    Abstract: An adjustable bit rate (ABR) feedback control scheme is provided where the effects of multiloop delays and high priority traffic transmission are built into the control model. The data traffic is filtered by a low pass filter. Then, the low frequency bandwidth of the filtered traffic is measured and compared to a predetermined threshold. If the measured value exceeds the threshold, the ABR traffic flow is reduced. If the measured value is less than the threshold, the ABR traffic flow is increased. In addition, a General Prediction Control (GPC) method may be applied to the control model for optimal performance. An object of the invention is to minimize the unused link capacity subject to no congestion, where the ABR traffic is adapted to the low frequency variation of high priority traffic flow for high efficiency.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: November 7, 2000
    Assignees: SBC Technology Resources, Inc., The University of Texas at Austin, Texas
    Inventors: Yongdong Zhao, San-Qi Li, Sam Sigarto