Fairness among high speed and traditional TCP under different queue management mechanisms

  • Authors:
  • Addisu Eshete;Yuming Jiang;Lars Landmark

  • Affiliations:
  • Norwegian University of Science and Technology, O. S. Bragstads plass, Trondheim, Norway;Norwegian University of Science and Technology, O. S. Bragstads plass, Trondheim, Norway;Norwegian University of Science and Technology, O. S. Bragstads plass, Trondheim, Norway

  • Venue:
  • Proceedings of the Asian Internet Engineeering Conference
  • Year:
  • 2012

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Abstract

The Internet is no longer controlled by a single TCP algorithm. Due to the scalability limitations of traditional TCP algorithms, a plethora of new high-speed TCP congestion control algorithms have been proposed and deployed. Having no standards to follow, these algorithms are ad hoc fixes and some of them have been adopted by various operating system vendors. This begs the question of whether these heterogeneous TCP algorithms are fair or compatible both to each other and to the traditional TCP algorithm. Our simulation study shows that most of the TCP algorithms are surprisingly highly unfair to each other or to the traditional TCP algorithm under several well-known queue management (QM) schemes. This calls for new approaches to QM schemes, and a recently proposed QM scheme, AFpFT, is hence included in the study. Promisingly, AFpFT helps battle the TCP heterogeneity and enforce fairness among the various considered TCP variants. We believe this study sheds new lights on TCP and QM designs.