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Achieving Weighted Fairness for High Performance Distributed Coordination Function with QoS Support in WLANs

Conference paper
Part of the Smart Innovation, Systems and Technologies book series (SIST, volume 20)

Abstract

This study proposed a High performance Distributed Coordination Function with QoS support (QHDCF) protocol to enhance the throughput and achieve fair allocation of wireless medium access. QHDCF protocol has two working modes: contending mode and active mode. In the contending mode, all stations follow DCF scheme to contend for channel access. Once a station successfully accesses the channel, it switches to the active mode. In the active mode, the transmitting station determines the next transmitter according to a selection scheme from a probability formulation perspective. The selection scheme is based on relative weights of different traffic classes so that weighted-fairness can be achieved. Besides, since most stations do not contend for channel access, collisions are reduced a lot and therefore the throughput is enhanced. Simulation results show that QHDCF performs significantly better than EDCA in terms of both weighted fairness and throughput.

Keywords

EDCA QoS Collision Weighted fairness 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Yeong-Sheng Chen
    • 1
  • Fan-Chun Tseng
    • 1
  • Chih-Heng Ke
    • 2
  1. 1.Department of Computer ScienceNational Taipei University of EducationTaipeiTaiwan
  2. 2.Department of Computer Science and Information EngineeringQuemoy UniversityKinmenTaiwan

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