Patents Assigned to The University of Texas at Austin, Texas
  • 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
  • Process for metal deposition for microelectronic interconnections
    Patent number: 5292558
    Abstract: A method for forming interconnections in microelectronic devices, including interconnections through small vias between different layers in the microelectronic devices include the spin coating of a film comprising a polyoxometalate and an organic material on the substrate. The film is optionally patterned by lithography, the polymer is removed, and the polyoxometalate is reduced to a metal layer. The metal layer may in one embodiment provide a nucleating zone for the deposition of metal.
    Type: Grant
    Filed: August 8, 1991
    Date of Patent: March 8, 1994
    Assignee: University of Texas at Austin, Texas
    Inventors: Adam Heller, Panagiotis Argitis, Joseph C. Carls