Performance analysis of IEEE 802.11 DCF in a multi-rate WLAN

Weikuo Chu*, Yu-Chee Tseng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The IEEE 802.11 family of specifications is by far the most prominent and successful technique for accessing WLANs. Because the channel used by wireless devices is a time-varying broadcast medium, these devices need to have multi-rate and rate-adaptive capability to adapt to the changing channel so that better performance can be achieved. In this paper, we propose an analytical model, which we call Rate-Adaptive Markov Chains, to study the saturation throughput and delay performance of an 802.11 WLAN in which the mobile hosts have multi-rate support, will use the ARF protocol to adapt rates for different channel qualities, and follow the DCF protocol to contend for data transmissions in a slowly-varying channel. Simulation results are also provided to verify the correctness of the model.

Original languageEnglish
Pages (from-to)2836-2844
Number of pages9
JournalIEICE Transactions on Communications
Issue number10
StatePublished - 1 Jan 2007


  • 802.11 DCF
  • ARF
  • Markov Chain

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