Resolving 802.11 performance anomalies through QoS differentiation

Hyogon Kim, Sangki Yun, Inhye Kang, Saewoong Bahk

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)


It was recently shown that 802.11b MAC has an "anomaly" that the throughput of high bit-rate terminals in good channel condition is down-equalized to that of the lowest bit-rate peer in the network. In this letter, we analytically prove that the phenomenon can be cleanly resolved through configuring the initial contention window size inversely proportional to the bit-rate. Although contention window size variation has been used to induce throughput differentiation among equal bit-rate terminals, our work is the first to apply the technique to different bit-rate terminals.

Original languageEnglish
Pages (from-to)655-657
Number of pages3
JournalIEEE Communications Letters
Issue number7
Publication statusPublished - 2005 Jul

Bibliographical note

Funding Information:
Manuscript received December 6, 2004. The associate editor coordinating the review of this letter and approving it for publication was Christos Douligeris. This work was supported by the the University IT Research Center Project and the NRL Program of KISTEP. H. Kim and S. Yun are with the Korea University (e-mail: I. Kang is with the University of Seoul. S. Bahk is with the Seoul National University. Digital Object Identifier 10.1109/LCOMM.2005.07015.


  • 802.11 performance anomaly
  • Service differentiation
  • Wireless LAN

ASJC Scopus subject areas

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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