COLLOQUIUM Department of Computer Science and Engineering University of South Carolina Localized Approach to Providing Quality of Service Srihari Nelakuditi Department of Computer Science University of Minnesota Date: June 3, 2002 (Monday) Time: 1:30-2:30PM Place: Swearingen 1A03 (Faculty Lounge) Abstract There are two fundamentally different ways of supporting multimedia applications such as audio and video playback over a network. One approach is to have the application at the end system adapt its playback quality based on the currently available resources in the network. Another approach is to provision resources within the network for the application such that the desired quality of service can be assured. To ensure scalability of these solutions, it is desirable to find simple local rules and strategies that can produce coherent and purposeful global behavior. In this talk, I present localized QoS routing schemes based on a guaranteed service model for selecting good quality paths without accurate global information. I will also describe algorithms based on end system adaptation for selectively discarding frames locally at a video server such that avoiding packet drops and delays in the network maximizes the quality of the video delivered. Srihari Nelakuditi received the B.S. degree in Computer Science from Andhra University in 1989, the M.Tech. degree in Computer Science from the Indian Institute of Technology in Madras in 1991, and the Ph.D. degree in Computer Science from the University of Minnesota at Minneapolis in December 2001, where he is currently a postdoctoral fellow. Dr. Nelakuditi was a software design engineer for Texas Instruments in Bangalore, India, from 1991 to 1994 and an intern at Sandia National Laboratories during his Ph.D. studies. Dr. Nelakuditi's research interests include quality-of-service routing, inter-domain routing, multi-protocol label switching, video streaming, wireless networks, and mobile networks.