On throughput performance of channel inequality in IEEE 802.11 WLANs

Chiapin Wang*, Tsungnan Lin, Kuang Wei Chang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


In this paper we investigate the throughput performance of IEEE 802.11 Distributed Coordination Function (DCF) in the presence of physical-layer (PHY) inequality, i.e. varied channel conditions and/or unequal data rates determined by the Link Adaptation (LA) scheme. We present a theoretical model for DCF protocol with the LA scheme of AutoRate Fallback (ARF). The analysis results show that the system throughput of DCF-based WLANs is determined by the lowest data rate used with stations; throughput sharing among stations depends on the variation of link qualities rather than the difference of data rates. The simulation results validate the accuracy of our analytical model.

Original languageEnglish
Article number4686818
Pages (from-to)4425-4431
Number of pages7
JournalIEEE Transactions on Wireless Communications
Issue number11
Publication statusPublished - 2008 Nov


  • DCF
  • IEEE 802.11 WLAN
  • Performance analysis

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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