Evaluation of Transport Layer Loss Notification in Wireless Environments

  • Johan Garcia
  • Anna Brunstrom
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3420)


Residual bit-errors in wireless environments are well known to cause difficulties for congestion controlled protocols like TCP. In this study we focus on a receiver-based loss differentiation approach to mitigating the problems, and more specifically on two different loss notification schemes. The fully receiver-based 3-dupack scheme uses additional dupacks to implicitly influence the retransmission behavior of the sender. The second TCP option scheme uses a TCP option to explicitly convey a corruption notification. Although these schemes look relatively simple at first glance, when examining the details several issues exist which are highlighted and discussed. A performance evaluation based on a FreeBSD kernel implementation show that the TCP option scheme works well in all tested cases and provides a considerable throughput improvement. The 3-dupack scheme also provide performance gains in most cases, but the improvements varies more between different test cases, with some cases showing no improvement over regular TCP.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Johan Garcia
    • 1
  • Anna Brunstrom
    • 1
  1. 1.Dept. of Comp. Sci.Karlstad UniversityKarlstadSweden

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