Speaker:
Anwar Walid
Bell Labs

Time: 3:00 PM -- 4:00 PM, April 18^th (Wednesday), 2012

Location: Babbio Center, Room 203

ABSTRACT
The goal of building energy-efficient information and communication networks is now widely embraced. Various mechanisms are being developed to save energy at network nodes based on local traffic conditions and objectives; however, their cumulative impact on the end-to-end application performance is not well understood. TCP is the dominant transport protocol on the internet, and its end-to-end operation ties in the performance of all energy saving mechanisms in the network. We develop a network utility theory to study and design distributed algorithms for network congestion control and energy consumption optimization, and study their stability and convergence properties. For current TCP and active queue management (AQM) algorithms, we propose a novel dynamic bandwidth adjustment mechanism to turn off excess resources and save energy without compromising end-to-end performance. New directions for TCP source algorithms will be reviewed. I will also review related work within Greentouch, a consortium led by Bell Labs with the goal of improving network energy efficiency by a factor of 1000.

BIOGRAPHY
Anwar Walid is a Distinguished Member of Technical Staff with Bell Laboratories, Alcatel-Lucent, and a member of Alcatel-Lucent Academy. He is also Director of Research Partnerships and University Relations in the Bell labs Chief Scientist Office. Dr. Walid is an IEEE Fellow. He received his Ph.D. degree from Columbia University, and the M.S. and B.S. degrees from Polytechnic Institute of New York University, all in Electrical Engineering. He holds eight patents and six pending in various networking areas. He received multi-year research funding from DARPA and NSF. Dr. Walid received the Best Paper Award from ACM SIGMETRICS/IFIP Performance. He contributed to the Internet Engineering Task Force (IETF), wrote RFC's and helped create the Traffic Engineering Working Group. He served on NSF panels and on executive and technical program committees of many past conferences. He is co-chair of the Technical Program Committee of IEEE INFOCOM 2012 and editor of the IEEE Network Magazine and the IEEE/ACM Transactions on Networking. Dr. Walid is an adjunct professor in Electrical Engineering at Columbia University. He is an elected member of Tau Beta Pi (National Engineering Honor Society) and IFIP Working Group 7.3.

For more information please contact:

Dr. Yu-Dong Yao
Professor & Department Director, IEEE Fellow (RESEARCH INTERESTS: Wireless communications and networks, cognitive and software-defined radio)
Burchard Building
Room B-212
Phone: 201.216.5264
Fax: 201.216.8246
yyao@stevens.edu

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