A versatile model for asymmetric TCP sources

N.D. van Foreest, M.R.H. Mandjes, Willem R.W. Scheinhardt

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


In the literature it is quite common to model TCP sources as Additive-Increase Multiplicative-Decrease sources. Within this framework we develop a Markov chain model that captures the interaction between the source and buffer processes. This approach permits to investigate a number of TCP related phenomena that are inherently stochastic. In the first place we evaluate two popular loss models: one in which sources react in a synchronized manner to loss, the other in which just one source reduces its window after loss epochs with a probability that is proportional to the source window. A comparison with a simulation in ns2 shows that the real loss process is somewhere in between the two loss models. Secondly, we show that the celebrated 'root p' law is still valid when the loss process is strictly dependent on the source state instead of an autonomous process, and the roundtrip times are stochastic instead of constant. Finally, we analyze the impact of source on/off behavior when the source on-times depend on momentary source transmission rates, as is the case in practice.
Original languageUndefined
Title of host publicationProviding Quality of Service in Heterogeneous Environments, Proceedings of the 18th International Teletraffic Congress (ITC-18)
EditorsJ.J.W. Charzinski, R. Lehnert, P. Tran-Gia
Place of PublicationAmsterdam
Number of pages10
ISBN (Print)978-0-444-51455-4
Publication statusPublished - Aug 2003
Event18th International Teletraffic Congress 2003: Providing QoS in Heterogeneous Environments - Berlin, Germany
Duration: 31 Aug 20035 Sep 2003
Conference number: 18

Publication series

NameTeletraffic Science and Engineering


Conference18th International Teletraffic Congress 2003
Abbreviated titleITC 2003
Internet address


  • TCP Metro ethernet
  • METIS-212032
  • TCP Modelling
  • IR-71046
  • EWI-17757

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