Enhancing TCP throughput and fairness with a timer-based transmission control over heterogeneous networks

Lee Jongmin, Cha Hojung, Ha Rhan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a sender-side TCP congestion control mechanism that improves both throughput and fairness in wired as well as wireless networks. A traditional windows-based congestion control scheme adjusts the transmission rate only when the TCP sender receives an acknowledgement message or it detects a transmission timeout. Therefore, competing flows with different packet roundtrip times experience throughput unfairness because a flow with a short packet roundtrip time increases the transmission rate more quickly than the others do. Moreover, the cumulative acknowledgement message induces burst traffic, which overloads the network. In addition, packet losses delay the packet transmission until the amount of date transmitted without acknowledgements from the receiver equals to the reduced congestion window size, and it degrades transmission performance. The proposed mechanism adjusts the transmission rate based on a timer maintained by the TCP sender. As the mechanism adjusts the transmission rate regardless of the reception of acknowledgement messages, it improves fairness among flows with different packet roundtrip time, and prevents burst traffic caused by the cumulative acknowledgement message. The mechanism has been implemented in the Linux platform, and experienced with various TCP variants in real environments. The experimental result shows that the mechanism improves both throughput and fairness in wired as well as wireless networks.

Original languageEnglish
Title of host publicationInformation Networking
Subtitle of host publicationAdvances in Data Communications and Wireless Networks - International Conference, ICOIN 2006. Revised Selected Papers
PublisherSpringer Verlag
Pages650-659
Number of pages10
ISBN (Print)3540485635, 9783540485636
Publication statusPublished - 2006 Jan 1
EventInternational Conference on Information Networking, ICOIN 2006 - Sendai, Japan
Duration: 2006 Jan 162006 Jan 19

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume3961 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Other

OtherInternational Conference on Information Networking, ICOIN 2006
CountryJapan
CitySendai
Period06/1/1606/1/19

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Computer Science(all)

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  • Cite this

    Jongmin, L., Hojung, C., & Rhan, H. (2006). Enhancing TCP throughput and fairness with a timer-based transmission control over heterogeneous networks. In Information Networking: Advances in Data Communications and Wireless Networks - International Conference, ICOIN 2006. Revised Selected Papers (pp. 650-659). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 3961 LNCS). Springer Verlag.