Workshop on High-speed TCP

February 5/6, 2007.  Redmond, WA, USA


A number of new variants of TCP have been proposed that allow bulk-transfer TCP connections to more efficiently utilize high bandwidth links. However, there is concern that if these variants are deployed on a wide scale, they will adversely impact the performance of the global Internet. There is no consensus on how to evaluate these new TCP variants to ensure that they are safe for widespread deployment.  This workshop brings together prominent researchers working in this area to discuss these issues.


We have two specific goals. First, we hope to receive feedback from the participants about Microsoft's proposed high-speed TCP variant (called CTCP). Second, we will discuss recent results related to testing of these protocols and try to come up with common guidelines about how such protocols should be tested prior to Internet-wide deployment. Ideally, such guidelines will be formalized after further discussion at IETF/IRTF/ICCRG.


Academia and Industry

Microsoft Windows Networking Division

Microsoft Research

  • Bernard Aboba
  • Deepak Bansal
  • Chris Mitchell
  • Henry Sanders
  • Sandeep Singhal
  • Murari Sridharan
  • Rajesh Sundaram
  • Dave Thaler




Monday, February 5


Coffee etc.



Introductions, agenda bashing, welcome remarks

Jitu Padhye

9:30 - 10

Keynote: Enabling High Speed Congestion Control on the Internet

Henry Sanders

10 - 10:30

High-Speed Networking: Recent Developments, Issues and Challenges

Raj Jain

10:30 - 11

Impact of Background Traffic on Performance of High-speed TCPs

Injong Rhee

11 - 11:15


Lachlan Andrew



Doug Leith

11:30 - 12

Compound TCP

Murari Sridharan / Kun Tan

12 - 1



1 - 1:30

Evaluating new congestion control algorithms

Doug Leith

1:30 - 2

Testing TCP over Wide Area Networks

Yee-Ting Lee

2 - 2:30

Caltech's WAN-in-Lab Testbed

Lachlan Andrew

2:30 - 3



3 – 3:30

How to standardize new congestion control algorithms

Sally Floyd


Open Discussion / Panel (details below)


5:30 - 7:00

Break / Head back to hotel / Drive to restaurant





Panel Agenda

The panel will focus on discussing and agreeing to a set of criteria for deployment of high-speed congestion control algorithms on the Internet. The guidelines outlined in could be a starting point for the discussion.  The panel can get into questions like a) How is fairness defined? What timescales should fairness be measured? b) is theoretical backing about the stability of the protocol a must? c) Network topologies and traffic mix to test protocols? Is it possible for the research community to agree and publish such a test matrix? d) How are low and high levels of statistical multiplexing on the bottleneck link defined? e) Are some metrics more important than others? f) Should congestion algorithms be tested in isolation from the networking stack? g) do we expect multiple high-speed congestion algorithms to co-exist on the Internet? This might let vendors differentiate themselves as long as the algorithms are safe for deployment.


Tuesday, February 6

9 – 9:30

Coffee etc.


9:30 - 10

An End-to-End Transport Protocol for Extreme Wireless Network Environments

K. K. Ramakrishnan


Overview of theoretical research on TCP modeling and stability analysis

Peter Key

10:30 – 11

High-speed TCP does not matter to ISPs

Albert Greenberg

11 – 11:30

Next steps?

Lars Eggert


Concluding remarks

Rich Draves

12 – 1




Local information

If Microsoft paid for your hotel, you will be staying at the Bellevue Courtyard Marriott: 14615 NE 29th Pl, Bellevue, WA 98007.

Meeting location: Conference room 1021, Building 113, Microsoft Campus. The address is: 14870 N.E. 31st Way Redmond WA 98052.  You can see the overhead view and a 3D image.

After arriving, please park in any one of the guest parking spots. Someone will meet you in the building lobby and escort you to the conference room.

For dinner, we will go to the Desert Fire restaurant. Address: 7211 166th Ave NE, Redmond, WA, 98052.

Contact the organizers

Jitu Padhye , Deepak Bansal and Murari Sridharan