B-EDCA: A New IEEE 802.11e-Based QoS Protocol for Multimedia Wireless Communications

  • José Villalón
  • Pedro Cuenca
  • Luis Orozco-Barbosa
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3976)


The IEEE 802.11e draft standard is a proposal defining the mecha-nisms for wireless LANs aiming to provide QoS support to time-sensitive applications. However, recent studies have shown that the IEEE 802.11e (EDCA) performs poorly when the medium is highly loaded due to the high collision rate. Even though several proposals have been proposed to address this problem, they require important changes to the current standard specifications making difficult their actual implementation. In this paper, we propose a simple QoS-aware mechanism and fully compatible with the various operation modes of the EDCA standard as well as the legacy IEEE 802.11 (DCF) scheme. Our design has been based on an in-depth analysis of the several operation modes of both standards. This should ensure full compatibility of operation: an important feature since the transition from the IEEE 802.11 to the IEEE 802.11e will take some time making more likely the existence of hybrid scenarios where both standards will have to coexist. Our simulation results show that our new scheme outperforms the EDCA and other QoS-aware schemes recently reported in the literature.


Medium Access Control Packet Loss Rate Distribute Coordination Function Enhance Distribute Channel Access Video Traffic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© IFIP International Federation for Information Processing 2006

Authors and Affiliations

  • José Villalón
    • 1
  • Pedro Cuenca
    • 1
  • Luis Orozco-Barbosa
    • 1
  1. 1.Albacete Research Institute of InformaticsUniversidad de Castilla-La ManchaAlbaceteSpain

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