Distributed Resource Sharing for Internet and Mobile Video Streaming
Apr 27, 2012
from 10:00 AM to 11:00 AM
|Where||ENGR. IV Bldg., Tesla Room 53-125|
|Contact Name||Prof. Mihaela van der Schaar|
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Cisco Systems, Inc.
Popular sites such as YouTube and Netflix have made Internet video streaming an integral part of our lives. Increasingly, wireless networks are strained by the explosive growth of video traffic, due to proliferation of smartphones and tablets. It is time to revisit network resource sharing mechanisms, and tailor them to streaming video. This talk presents LIVA (layered Internet video adaptation), an optimization framework for distributed resource sharing among video streams. Unlike conventional TCP‐based schemes, LIVA leverages virtual congestion level information from network nodes to guide the selection of video rate and error protection strength. As a result, video streams adapt fast to transient events, experience no queuing delays or packet losses at steady state, and share the bottleneck bandwidth in proportion to their relative content complexities and priorities. Control-theoretical analysis shows that LIVA remains stable for arbitrary number of streams with round‐trip delays below a prescribed limit. We further explain how key ideas of LIVA can benefit mobile video streaming, where users experience highly dynamic and heterogeneous wireless link qualities. Looking forward, we discuss various intriguing challenges and opportunities for resource sharing in the era of cloud computing and social media.
Xiaoqing Zhu received the B.E. degree in Electronics Engineering from Tsinghua University, Beijing, China, in 2001. She received the M.S. and Ph.D. degrees in Electrical Engineering from Stanford University, Stanford, CA, in 2002 and 2009, respectively. She is currently a member of the Department of Advance Architecture and Research at Cisco Systems, Inc., San Jose, CA. She interned at IBM Almaden Research Center, San Jose, in 2003, and was with Sharp Laboratories of America, Camas, WA, in the summer of 2006. Her current research interests include wireless video networking, Internet video delivery, and resource allocation for distributed systems. Dr. Zhu was the recipient of the Stanford Graduate Fellowship from 2001 to 2005. She won the Best Student Paper Award in ACM Multimedia 2007.