Resolving 802.11 performance anomalies through QoS differentiation

Hyogon Kim, Sangki Yun, Inhye Kang, Saewoong Bahk

Research output: Contribution to journalArticlepeer-review

71 Scopus citations


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
StatePublished - Jul 2005


  • 802.11 performance anomaly
  • Service differentiation
  • Wireless LAN


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