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Title: Transparent Bandwidth Conservation through Stealth Multicast


Dr. Aaron Striegel,
Dept. of Computer Science & Engineering, University of Notre Dame




Over the past decade, the Internet has emerged as one of the primary tools for media dissemination. The traditional

point-to-point nature of the Internet has created a natural trend of increasingly redundant data across the network as applications

and information sources increase in both scope and scale. As a result of this trend, a wide variety of techniques have emerged to

increase the efficiency of the network through the reduction of redundant traffic with varying degrees of success. On one

extreme, the applications and network work together for efficiency such as seen in IP multicast. In the other extreme, the techniques

operate transparently to the applications and network such as in the various caching approaches (media, packet, etc.).


In this talk, I will discuss a novel concept entitled stealth multicast that allows for practical adoption of network-level multicast

on a domain-wise basis rather than global scale. With the stealth multicast framework, redundant unicast packets are

dynamically assembled into virtual groups for multicast transmission across the domain. At the edge of the domain, the packets

are converted back to unicast, thus hiding the existence of stealth multicast from the external Internet. True to its namesake, stealth

multicast operates in complete stealth, providing seamless interoperability without requiring modifications to end-user applications nor

requiring inter-domain support. I will present preliminary results of our work through simulation as well as applications of stealth multicast

to other complementary areas such as ALM (Application Layer Multicast) and single hop wireless networks.







Aaron Striegel received his Ph.D. degree in computer engineering from Iowa State University in 2002. He has been with the University of

Notre Dame in the Department of Computer Science and Engineering as an assistant professor since the spring of 2003. His research interests are in the area of Internet QoS, computer security, and grid computing. He has published in over 20 international journals and peer-reviewed conferences. He is a member of IEEE and was the recipient of a NSF CAREER award in 2004.