Scalable TCP: improving performance in highspeed wide area networks

ABSTRACT

TCP congestion control can perform badly in highspeed wide area networks because of its slow response with large congestion windows. The challenge for any alternative protocol is to better utilize networks with high bandwidth-delay products in a simple and robust manner without interacting badly with existing traffic. Scalable TCP is a simple sender-side alteration to the TCP congestion window update algorithm. It offers a robust mechanism to improve performance in highspeed wide area networks using traditional TCP receivers. Scalable TCP is designed to be incrementally deployable and behaves identically to traditional TCP stacks when small windows are sufficient. The performance of the scheme is evaluated through experimental results gathered using a Scalable TCP implementation for the Linux operating system and a gigabit transatlantic network. The preliminary results gathered suggest that the deployment of Scalable TCP would have negligible impact on existing network traffic at the same time as improving bulk transfer performance in highspeed wide area networks.

REFERENCES

• 1: Mark Allman, TCP byte counting refinements, ACM SIGCOMM Computer Communication Review, v.29 n.3, July 1999 [doi>10.1145/505724.505727]
• 2: L. S. Brakmo and L. L. Peterson. TCP Vegas: End to End Congestion Avoidance on a Global Internet. IEEE Journal on Selected Areas in Communications, 13(8):1465--1480, October 1995.
• 3: D. H. Choe and S. H. Low. Stabilized Vegas. In Proc. of the 39th Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, October 2002.
• 4: Jon Crowcroft , Philippe Oechslin, Differentiated end-to-end Internet services using a weighted proportional fair sharing TCP, ACM SIGCOMM Computer Communication Review, v.28 n.3, p.53-69, July 1998 [doi>10.1145/293927.293930]
• 5: Anja Feldmann , Anna C. Gilbert , Polly Huang , Walter Willinger, Dynamics of IP traffic: a study of the role of variability and the impact of control, Proceedings of the conference on Applications, technologies, architectures, and protocols for computer communication, p.301-313, August 30-September 03, 1999, Cambridge, Massachusetts, United States
• 6: S. Floyd. HighSpeed TCP for Large Congestion Windows. internet Draft<draft-floyd-tcp-highspeed-02.txt> February 2003. Work in progress.
• 7: S. Floyd, J. Mahdavi, M. Mathis, and M. Podolsky. An Extension to the Selective Acknowledgement (SACK) Option for TCP. Internet RFC 2883, July 2000.
• 8: S. Floyd, K. K. Ramakrishnan, and D. Black. The Addition of Explicit Congestion Notification (ECN) to IP. Internet RFC 3168, September 2001.
• 9: V. Jacobson, Congestion avoidance and control, Symposium proceedings on Communications architectures and protocols, p.314-329, August 16-18, 1988, Stanford, California, United States
• 10: V. Jacobson, R. Braden, and D. Borman. TCP Extensions for High performance. Internet RFC 1323, May 1992.
• 11: Dina Katabi , Mark Handley , Charlie Rohrs, Congestion control for high bandwidth-delay product networks, Proceedings of the 2002 conference on Applications, technologies, architectures, and protocols for computer communications, August 19-23, 2002, Pittsburgh, Pennsylvania, USA
• 12: T. Kelly. On Engineering a Stable and Scalable TCP Variant. Technical Report CUED/F-INFENG/TR.435, Laboratory for Communication Engineering, Cambridge University, June 2002.
• 13: M. Mathis, J. Mahdavi, S. Floyd, and A. Romanow. TCP Selective Acknowledgment Options. Internet RFC 2018, October 1996.
• 14: Archan Misra , Teunis J. Ott, Performance Sensitivity and Fairness of ECN-Aware 'Modified TCP', Proceedings of the Second International IFIP-TC6 Networking Conference on Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; and Mobile and Wireless Communications, p.624-635, May 19-24, 2002
• 15: Jitendra Padhye , Victor Firoiu , Donald F. Towsley , James F. Kurose, Modeling TCP Reno performance: a simple model and its empirical validation, IEEE/ACM Transactions on Networking (TON), v.8 n.2, p.133-145, April 2000 [doi>10.1109/90.842137]
• 16: W. Richard Stevens, TCP/IP illustrated (vol. 1): the protocols, Addison-Wesley Longman Publishing Co., Inc., Boston, MA, 1993
• 17: G. Vinnicombe. On the stability of networks operating TCP-like congestion control. In Proc. of the 15th IFAC World Congress on Automatic Control, Barcelona, Spain, July 2002.
• 18: Eric Weigle , Wu-chun Feng, A Case for TCP Vegas in High-Performance Computational Grids, Proceedings of the 10th IEEE International Symposium on High Performance Distributed Computing (HPDC-10'01), p.158, August 07-09, 2001