A Reactive Approach to QoS Provisioning in IEEE 802.11e WLANs

Author

Cacace, Filippo ; Iannello, Giulio ; Vellucci, Massimo ; Vollero, Luca

Author_Institution

Univ. Campus Bio-Med., Rome

fYear

2008

fDate

28-30 April 2008

Firstpage

253

Lastpage

260

Abstract

IEEE 802.11e provides basic mechanisms for traffic differentiation in WLANs previously unavailable with the IEEE 802.11 standard. The enhanced distributed channel access (EDCA) is probably the most promising subset of such mechanisms, and it is already implemented in a huge number of Network Cards. In this paper we present an algorithm for the provisioning of QoS in EDCA WLANs. The algorithm is based on monitoring and reactive configuration of EDCA mechanisms in scenarios where voice over IP (VoIP) and best effort (BE) applications concurrently access the wireless channel. Results obtained in a real test-bed prove the effectiveness of the algorithm both in protecting VoIP communications and in providing minimal quality levels and fairness to BE applications.

Keywords

IEEE standards; Internet telephony; quality of service; wireless LAN; wireless channels; Best Effort applications; IEEE 802.11e WLAN; QoS; VoIP; enhanced distributed channel access; network cards; traffic differentiation; voice over IP; wireless channel; Access protocols; Admission control; Communication system traffic control; Internet telephony; Monitoring; Multiaccess communication; Quality of service; Streaming media; Telecommunication traffic; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Next Generation Internet Networks, 2008. NGI 2008

Conference_Location

Krakow

Print_ISBN

1-4244-1784-8

Type

conf

DOI

10.1109/NGI.2008.41

Filename

4510813