What's New

Who I am, What I do. On a similar tone, how do you distinguish a researcher from a salesman?

I will be co-teaching a graduate course on Networks in Systems Biology in Fall'08 together with Prof. Todd Streelman from the School of Biology.

Spectral Probing, Crosstalk and Frequency Multiplexing in Internet Paths, with Partha Kanuparthy. In the Proceedings of the ACM SIGCOMM Internet Measurement Conference (IMC), October 2008.

Ten Years in the Evolution of the Internet Ecosystem, with Amogh Dhamdhere. In the Proceedings of the ACM SIGCOMM Internet Measurement Conference (IMC), October 2008.

Can ISPs be Profitable Without Violating Network Neutrality?, with Amogh Dhamdhere. In the Proceedings of the ACM SIGCOMM Network Economics (NetEcon) Workshop, August 2008.

Beyond the Model of Persistent TCP Flows: Open-Loop vs Closed-Loop Arrivals of Non-Persistent Flows, with R.Prasad. In the Proceedings of the 41st Annual Simulation Symposium, April 2008.

What would Darwin Think about Clean-Slate Architectures? ACM Computer Communications Review (CCR), Editorial Zone, January 2008. Of related interest: Four Myths about GENI (and one recommendation) Presented at the DIMACS Tutorial on Algorithms for Next Generation Networks (panel session on GENI), August 2007.

Router Buffer Sizing Revisited: The role of the input/output capacity ratio, with R.Prasad and M.Thottan. In the Proceedings of the ACM CoNext conference, New York, December 2007. Link to NS scripts and other related data

NetDiagnoser: Troubleshooting Network Unreachabilities using End-to-End Probes and Routing Data, with A.Dhamdhere, R.Teixeira and C.Diot. In the Proceedings of the ACM CoNext conference, New York, December 2007.

Education

• Ph.D., University of Wisconsin-Madison December 2000
  Research advisor: Parmesh Ramanathan
• M.S., University of Rochester May 1996
• B.Eng., Technical University of Crete June 1995

Teaching

• I will be co-teaching a graduate course on Networks in Systems Biology in Fall'08 together with Prof. Todd Streelman from the School of Biology.

• CS 4270: Internet Lab (Fall 2008)
• CS 7270: Internet applications and services (Fall 2007, will be given again in Spring'09)
• CS 6250: Advanced Computer Networks (Fall 2006)
• CS 2200: Systems and Networks (Spring 2006)
• CS 3251: Computer Networks I (Fall 2005)
• CS 8803: Experimental Performance Evaluation of Computer Systems and Networks (Spring 2005)
• CS 4251: Computer Networks II (Fall 2004, Spring 2004)
• CS 8803: Network Measurements (Fall 2003)
• CS 7260: Internetworking Architectures and Protocols (Spring 2003)

Research

Ongoing Research Projects

• Understanding Internet evolution
• The scalability of interdomain Internet routing
• Intelligent route control and performance-based routing
• Applications of network measurement in VoIP, IPTV, and network problem diagnosis
• Web Science

Public-domain software

• Pathrate, Pathload and ABget (bandwidth estimation tools)

Previous Research Projects

• Router buffer sizing
• Network bandwidth estimation
• Proportional differentiated services

Research advisees

• Amogh Dhamdhere (since summer'03, PhD program)
• Partha Kanuparthy (since Jan'07, PhD program)
• Chidambaram Muthu (since summer'07, MS program)
• Samantha Lo (since summer'07, MS program)
• Nehil Jain (since Jan'08, MS program)

Former PhD advisees:

• Ravi Prasad (graduated in December'07, now at Cisco Research)
• Ruomei Gao (co-advised with Ellen Zegura, graduated in August'07, now at Akamai)
• Manish Jain (graduated in December'06, now at Microsoft Research)
• Yong Zhu (co-advised with Mostafa Ammar, graduated in August'06, now at Amazon)
• Qi He (co-advised with Mostafa Ammar, graduated in August'05, now at Yahoo!)

Funding

• Cisco Systems Inc,
  "Ingress Traffic Engineering and Performance Routing",
  July 2007 to July 2008.
• Telchemy Inc,
  "Network Problem Diagnosis in VoIP and IPTV applications",
  January 2007 to December 2007.
• Cisco Systems Inc,
  "Dynamics and Stability of Performance-Driven Edge Routing Systems",
  January 2006 to December 2006.
• National Science Foundation,
  Nets-NBD: Intelligent routing control systems: panacea or imminent disaster? ,
  September 2005 to September 2007.

• EGT Inc,
  "Using network measurements in video transport",
  September 2005 to August 2006.
• National Science Foundation,
  CAREER: Putting Measurements to Work: Design and Evaluation of Measurement-Driven Network Mechanisms,
  September 2004 to August 2009.

• Georgia Tech Broadband Institute,
  "Design of Overlay Network Routers using Network Processors",
  July 2003 to July 2004.
• National Science Foundation,
  NetReact Services: Middleware Technologies to Enable Real-Time Collaboration,
  October 2002 to October 2005.
• Intel Corporation,
  Workstations and network processors for network measurements laboratory,
  equipment grant, August 2002.
• US Department of Energy (Office of Science),
  Scientific Discovery through Advanced Computing (SciDAC) program.
  Bandwidth Estimation: measurement methodologies and applications,
  in collaboration with CAIDA,
  September 2001 to August 2004.

Professional Service (recently)

• USENIX/ACM IMC 2007, TPC Co-Chair
• ACM HotNets 2007, General Chair
• 3rd International Workshop on Wireless Network Measurement (WiNMee'07), Co-Chair
• ACM Computer Communication Review (CCR), Editor
• ACM SIGCOMM 2007, 2006, 2004, TPC member
• ACM SIGMETRICS 2007, 2006, TPC member
• IEEE INFOCOM 2007, 2006, 2005, 2004, 2002, TPC member
• USENIX/ACM IMC 2005, 2004, TPC member
• PAM (Passive & Active Measurement) 2005 , Program chair (and member of the Steering Committee 2005-2007)
• Bandwidth Estimation workshop 2003, Program co-chair
• ICDCS 2003, TPC member