UW-Madison Logo

SWORD: Scalable Wide-area On-demand Reliable Digital Streaming

Directed by Mary K. Vernon

Overview
People
Publications
Current Topics

Project Sponsors

Other Project Support

Project Overview

This project is developing next-generation transport level and application level data delivery protocols for the Internet and other on-demand data delivery systems that will contain large, popular, widely-shared streaming media files.

The approach that we have pioneered includes:

  • a scalable near-optimal transport protocol that shares bandwidth fairly and includes a small number of input parameters that are easy to configure for all network paths,
  • simple, scalable on-demand real-time streaming protocols that recover lost packets and use multicast to implement optimized client stream sharing,
  • streaming content distribution networks that minimize delivery cost, taking client cost sharing into account,
  • delivery protocols that can be applied to media objects that have high, moderate, or time varying popularity,
  • design of the techniques for Internet (or Web) delivery as well as for satellite/cable delivery, and
  • the use of high-fidelity analytic models as well as a prototype implementation to guide system design.

The results of the research have been implemented in the SWORD prototype streaming system, to demonstrate implementation feasibility and validate the projected performance improvements.


vernon@cs.wisc.edu