Application of network layer mechanisms for service differentiation in 802.11 WLANs: implementation and experience

Author

Siris, Vasilios A. ; Stamatakis, George

Author_Institution

Inst. of Comput. Sci., Found. for Res. & Technol. - Hellas, Crete

Volume

1

fYear

2006

fDate

3-6 April 2006

Firstpage

217

Lastpage

222

Abstract

In this paper we present the design, implementation, and experience in using network layer mechanisms for service differentiation in 802.11 wireless LANs (WLANs). In particular, we use the class-based weighted fair queuing (CBWFQ) mechanism with weights that are dynamically adjusted based on the achieved throughput of the wireless stations and their physical layer transmission rate. The scheme was implemented in a Linux-based testbed, and experiments show that it can effectively support throughput differentiation, and deal with important WLANs problems, such as unfairness due to location-dependent channel errors, uplink-downlink unfairness, and performance degradation for the whole WLAN when a station transmits at a small rate. The experiments involved best-effort traffic, as well as streaming video and voice-over-IP

Keywords

DiffServ networks; Linux; queueing theory; radio links; telecommunication traffic; wireless LAN; 802.11 WLAN; Linux-based testbed; best-effort traffic; class-based weighted fair queuing; location-dependent channel errors; network layer mechanisms; service differentiation; streaming video; uplink-downlink unfairness; voice-over-IP; wireless LAN; Intelligent networks; Internet telephony; Physical layer; Streaming media; Telecommunication traffic; Testing; Throughput; Traffic control; Wireless LAN; Wireless networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2006. WCNC 2006. IEEE

Conference_Location

Las Vegas, NV

ISSN

1525-3511

Print_ISBN

1-4244-0269-7

Electronic_ISBN

1525-3511

Type

conf

DOI

10.1109/WCNC.2006.1683467

Filename

1683467