TCP testing: how well does ns2 match reality?

Martin Bateman*, Saleem Bhatti

*Corresponding author for this work

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

6 Citations (Scopus)

Abstract

New transport protocols continue to appear as alternatives to the Transmission Control Protocol (TCP). Many of these are are designed to address TCP's inefficiency in operating over paths with a high bandwidth-delay product (BDP). To test these new protocols, especially comparatively, and to understand their interactions, extensions to the ns2 simulator allow real code from the linux kernel to be used within the ns2 simulations. However, how does the performance of such configurations compare to test-bed experiments of the same configuration? Although, anecdotally, there are often comments within the research community about such issues, there are no studies that quantify the differences for a specific protocol suite. Using a simple testbed, we assess four different transport protocols in a comparative study to examine how well ns2 matches reality. Our tests are all conducted at 100Mb/s over a wide range of delay and router buffer conditions: end-to-end delays from 25ms to 400ms, with end-to-end path buffering of 20% to 100% of the BDP. We find that in our simple configuration, there are significant differences in performance between ns2 and the testbed.

Original languageEnglish
Title of host publication2010 24th IEEE International Conference on Advanced Information Networking and Applications (AINA)
Place of PublicationLos Alamitos
PublisherIEEE COMPUTER SOC
Pages276-284
Number of pages9
ISBN (Print)978-0-7695-4018-4
DOIs
Publication statusPublished - 2011
Event24th IEEE International Conference on Advanced Information Networking and Applications (AINA) - Perth, Australia
Duration: 20 Apr 201023 Apr 2010

Publication series

NameInternational Conference on Advanced Information Networking and Applications
PublisherIEEE COMPUTER SOC
ISSN (Print)1550-445X

Conference

Conference24th IEEE International Conference on Advanced Information Networking and Applications (AINA)
Country/TerritoryAustralia
CityPerth
Period20/04/1023/04/10

Keywords

  • TCP testing
  • High bandwidth-delay product
  • Linux kernel
  • ns2 simulator
  • Transmission control protocol
  • Transport protocol
  • Linux
  • Digital simulation
  • Program testing
  • Transport protocols

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