QoS provisioning in IEEE 802.11-compliant networks: Past, present, and future

Hwangnam Kim, Jennifer C. Hou, Chunyu Hu, Ye Ge

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Proliferation of portable, wireless-enabled laptop computers and PDAs, cost-effective deployment of access points, and availability of the license-exempt bands and appropriate networking standards contribute to the conspicuous success of IEEE 802.11 WLANs. In the article, we provide a comprehensive overview of techniques for capacity improvement and QoS provisioning in the IEEE 802.11 protocol family. These techniques represent the R&D efforts both in the research community and the IEEE 802.11 Working Groups. Specifically, we summarize the operations of IEEE 802.11 legacy as well as its extension, introduce several protocol modeling techniques, and categorize the various approaches to improve protocol capacity, to provide QoS (by either devising new MAC protocol components or fine-tuning protocol parameters in IEEE 802.11), and to judiciously arbitrate radio resources (e.g., transmission rate and power). To demonstrate how to adapt QoS provisioning in newly emerging areas, we use the wireless mesh network as an example, discuss the role IEEE 802.11 plays in such a network, and outline research issues that arise.

Original languageEnglish
Pages (from-to)1922-1941
Number of pages20
JournalComputer Networks
Issue number8
Publication statusPublished - 2007 Jun 6

Bibliographical note

Funding Information:
She has authored/co-authored more than 150 archived journal papers and peer-reviewed conference papers. She has been on the TPC of several major networking, real-time, and distributed systems conferences/symposiums, and was the Technical Program Co-chair of ACM Mobicom 2007, IEEE MASS 2006, IEEE IPSN 2004, and IEEE RTAS 2000, a Program Vice Chair of IEEE ICDCS 2002, IEEE ICPADS 2004, IEEE RTSS 2004, and the General Co-Chair of IEEE RTAS 2001. She has been on the editorial board of IEEE Trans. on Wireless Communications, IEEE Wireless Communications Magazine, IEEE Trans. on Parallel and Distributed Systems, ACM/Kluwer Wireless Networks, Computer Networks, and ACM Trans. on Sensor Networks. Her research focus is in the areas of network modeling and simulation, wireless sensor networks, and cyber physical computing with the emphasis on its use in healthcare. She was a recipient of the Service Appreciation Award from ACM in 2004, the Lumley Research Award from Ohio State University in 2001, the NSF CAREER award from NSF in 1996–2000 and the Women in Science Initiative Award from The University of Wisconsin – Madison in 1993–1995. She is a senior member of IEEE and a member of ACM.


  • IEEE 802.11 enhancement and extension
  • Quality of service
  • Wireless MAC protocol design and evaluation
  • Wireless local area networks

ASJC Scopus subject areas

  • Computer Networks and Communications


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