Wireless Personal Communications

, Volume 71, Issue 2, pp 1075–1083 | Cite as

A Throughput Model of IEEE 802.11aa Intra-Access Category Prioritization

Open Access


In this paper the first saturation throughput model of an IEEE 802.11 network is presented, which includes the intra-access category prioritization introduced in the recently approved IEEE 802.11aa standard. This new feature was proposed to support finer grained prioritization of audio video streams in comparison to the existing Enhanced Distributed Channel Access (EDCA) function. The presented model implements different transmission probabilities for the primary and alternate voice and video queues. Additionally, it includes such features as virtual collision handling, backoff differentiation, and Arbitration Inter-Frame Space differentiation. The presented results show the difference in the operation of IEEE 802.11aa intra-access category prioritization and EDCA inter-access category prioritization. They also allow to derive several novel conclusions.


Intra-access category prioritization QoS IEEE 802.11aa Audio video streaming 


  1. 1.
    IEEE Std 802.11-2012 (2012). IEEE Standard for Information technology—telecommunications and information exchange between systems—local and metropolitan area networks—specific requirements—part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, March (2012).Google Scholar
  2. 2.
    IEEE 802.11aa (2012). IEEE standard for local and metropolitan area networks—specific requirements—part 11: Wireless LAN medium access control (MAC) and physical layer (PHY) specifications—amendment 2: MAC enhancements for Robust 12 Audio Video Streaming, May (2012).Google Scholar
  3. 3.
    IEEE Std 802.1Qav-2009 (2010). IEEE standard for local and metropolitan area networks—Virtual bridged local area networks. Amendment 12: Forwarding and queuing enhancements for time-sensitive streams, January (2010).Google Scholar
  4. 4.
    Gas M., Kosek-Szott K., Natkaniec M., Pach A. R. (2011) 3D Markov chain-based saturation throughput model of IEEE 802.11 EDCA. Electronics Letters 47(14): 826–827CrossRefGoogle Scholar
  5. 5.
    Mathematica 8.0 [Online] http://www.wolfram.com.
  6. 6.
    The Network Simulator ns-2. [Online] http://isi.edu/nsnam/ns.

Copyright information

© The Author(s) 2012

Authors and Affiliations

  1. 1.Faculty of Computer Science, Electronics and TelecomunicationsAGH University of Science and TechnologyKrakowPoland

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