The Adaptive Voice/Data Networks Project

University of Kansas

Overview

Narrowband integrated voice/data networks require that congestion control and bandwidth management techniques be implemented in order to provide the desired quality of service. In this project, we exploit the capabilities of the Sinusoidal Transform Coder (STC), a low bit-rate digital speech coder, to address these requirements. An adaptive voice/data switch has been developed to support these investigations. The switch allocates bandwidth based on its load, and performs adaptive rate transformations on the coded speech to trade quality versus channel availablity. The unique features of the coding scheme and the control algorithms allow for efficient and flexible bandwidth usage, particularly under conditions of high load.

This research is supported by Rome Laboratories under contract F30602-93-D-0075, subcontract C/UB-1754-D.

Switch and Network Architecture

Application Environment

AVD Switch Board

Papers

  • Sinusoidal Transform Coder based Congestion Control in Integrated Voice/Data Networks
    Sona S. Kapadia, Najeeb I. Ansari, Joseph B. Evans
    Proc. Intl. Conf. Signal Proc. Appl. & Tech., 1994
    PostScript, PDF
  • A Flexible Multirate Speech Coder
    Terrence G. Champion and Joseph B. Evans
    Proc. Intl. Conf. Signal Proc. Appl. & Tech., 1993
    PostScript, PDF
  • Presentations

  • Sinusoidal Transform Coder based Congestion Control in Integrated Voice/Data Networks
    Sona S. Kapadia, Najeeb I. Ansari, Joseph B. Evans
    Proc. Intl. Conf. Signal Proc. Appl. & Tech., 1994
    PostScript, PDF
  • Quarterly Reports

  • First Quarter
  • Second Quarter
  • Third Quarter
  • Fourth Quarter
  • Fifth Quarter
  • Final Report
  • Masters Theses and Reports

  • Protocol Design for Congestion Management in Narrowband Integrated Networks
    Sona S. Kapadia, Masters Thesis, University of Kansas, 1994
    PostScript, PDF
  • More Information

  • System Architecture and Network Applications
  • Example Signaling Flow Diagram
  • Example Switch and Network Configuration
  • AVD Switch Board Layout
  • Placement Layer 1
  • Placement Layer 1
  • Routing Layer 1
  • Routing Layer 2

  • Author

    Joseph B. Evans

    Last updated: 7 April 1995.