A multi-level TCP model with heterogeneous RTTs

Pasi Lassila, Michel Mandjes

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


This paper studies TCP performance focusing on the mean flow transfer delay and the average number of concurrent flows in the system. This is done for a dynamic population of users, rather than a static number of permanent flows. The modeling approach relies on using idealized processor sharing models as a starting point and modifying their properties to take into account some of TCPs non-ideal behavior. To this end, a model is derived that incorporates the effect of packet losses and RTTs on the goodput, as well as limited sending rates. Also, the unequal sharing of bandwidth between flows with different RTTs can be treated. The delay estimates take into account the initial slow start. Extensive ns2 simulations are used to verify the accuracy of the models.
Original languageEnglish
Title of host publicationNetworking 2004
Subtitle of host publicationThird International IFIP-TC6 Networking Conference Athens, Greece, May 9–14, 2004, Proceedings
EditorsNikolas M. Mitrou, Kimon Kontovasilis, George N. Rouskas, Ilias Iliadis, Lazaros Merakos
Place of PublicationBerlin
Number of pages12
ISBN (Electronic)978-3-540-24693-0
ISBN (Print)978-3-540-21959-0
Publication statusPublished - 8 Apr 2004
Event3rd International IFIP-TC6 Networking Conference, NETWORKING 2004 - Athens, Greece
Duration: 9 May 200414 May 2004
Conference number: 3

Publication series

NameLecture Notes in Computer Science
PublisherSpringer Verlag
ISSN (Print)0302-9743


Conference3rd International IFIP-TC6 Networking Conference, NETWORKING 2004
Abbreviated titleNETWORKING


  • METIS-220830
  • IR-70550
  • EWI-17713


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