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Adaptive EDCF: Enhanced service differentiation for IEEE 802.11 wireless-ad-hoc networks

Research output: Contribution in Book/Report/ProceedingsConference contribution

Published

  • L Romdhani
  • Q Ni
  • T Turletti
Publication date2003
Host publicationWireless Communications and Networking, 2003. WCNC 2003. 2003 IEEE
Place of publicationNew York
PublisherIEEE
Pages1373-1378
Number of pages6
ISBN (Print)0-7803-7700-1
Original languageEnglish

Conference

ConferenceIEEE Wireless Communications and Networking Conference
CityNEW ORLEANS
Period16/03/0320/03/03

Conference

ConferenceIEEE Wireless Communications and Networking Conference
CityNEW ORLEANS
Period16/03/0320/03/03

Abstract

This paper describes an adaptive service differentiation scheme for QoS enhancement in IEEE 802.11 wireless ad-hoc networks. Our approach, called Adaptive Enhanced Distributed Coordination Function (AEDCF), is derived from the new EDCF introduced in the upcoming IEEE 802.11e standard. Our scheme aims to share the transmission channel efficiently. Relative priorities are provisioned by adjusting the size of the Contention Window (CW) of each traffic class taking into account both applications requirements and network conditions. We evaluate through simulations the performance of AEDCF and compare it with the EDCF scheme proposed in the 802.11e. Results show that AEDCF outperforms the basic EDCF, especially at high traffic load conditions. Indeed, our scheme increases the medium utilization ratio and reduces for more than 50% the collision rate. While achieving delay differentiation, the overall goodput obtained is up to 25% higher than EDCF. Moreover, the complexity of AEDCF remains-similar to the EDCF scheme,enabling the design of cheap implementations.