Fluid-flow modeling of a relay node in an IEEE 802.11 wireless ad-hoc network

Frank Roijers*, Hans van den Berg, Michel Mandjes

*Corresponding author for this work

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

3 Citations (Scopus)


Wireless ad-hoc networks are based on shared medium technology where the nodes arrange access to the medium in a distributed way independent of their current traffic demand. This has the inherent drawback that a node that serves as a relay node for transmissions of multiple neighboring nodes is prone to become a performance "bottleneck". In the present paper such a bottleneck node is modeled via an idealized fluid-flow queueing model in which the complex packet-level behavior (MAC) is represented by a small set of parameters. We extensively validate the model by ad-hoc network simulations that include all the details of the widely used IEEE 802.11 MAC-protocol. Further we show that the overall flow transfer time of a multi-hop flow, which consists of the sum of the delays at the individual nodes, improves by granting a larger share of the medium capacity to the bottleneck node. Such alternative resource sharing strategies can be enforced in real systems by deploying the recently standardized IEEE 802.HE MAC-protocol. We propose a mapping between the parameter settings of IEEE 802. HE and the fluid-flow model, and validate the fluid-flow model and the parameter mapping with detailed system simulations.

Original languageEnglish
Title of host publicationManaging Traffic Performance in Converged Networks
Subtitle of host publication20th International Teletraffic Congress, ITC20 2007, Ottawa, Canada, June 17-21, 2007. Proceedings
EditorsLorne Mason, Tadeusz Drwiega, James Yan
Place of PublicationBerlin, Heidelberg
Number of pages4
ISBN (Electronic)978-3-540-72990-7
ISBN (Print)978-3-540-72989-1
Publication statusPublished - 2007
Event20th International Teletraffic Congress, ITC 2007 - Ottawa, Canada
Duration: 17 Jun 200721 Jun 2007

Publication series

NameLecture Notes in Computer Science
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference20th International Teletraffic Congress, ITC 2007
Abbreviated titleITC20


  • Medium access control
  • Source node
  • Relay node
  • Resource sharing
  • Transfer time


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