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Systems Seminar - CSE

Energy-Efficient Congestion Control

Anwar WalidDistinguished Member of Technical StaffBell Laboratories, Alcatel-Lucent

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 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 traditional TCP algorithms and active queue management, we propose a novel dynamic bandwidth adjustment mechanism to turn off excess link resources and save energy without compromising end-to-end performance. For the emerging multipath TCP, we propose new energy-aware source algorithms which maximize throughput with applications to multi-radio smartphones and datacenter networking.
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 seven pending in various networking areas. Dr. Walid received the Best Paper Award from ACM SIGMETRICS/IFIP Performance. He contributed to standards bodies including the IETF. He was co-chair of the Technical Program Committee of IEEE INFOCOM 2012 and is 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.

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