On Throughput Performance of Channel Inequality in IEEE 802.11 WLANs

Author

Wang, Chiapin ; Lin, Tsungnan ; Chang, Kuang-Wei

Author_Institution

Inst. of Appl. Electron. Technol., Nat. Taiwan Normal Univ., Taipei

Volume

7

Issue

11

fYear

2008

fDate

11/1/2008 12:00:00 AM

Firstpage

4425

Lastpage

4431

Abstract

In this paper we investigate the throughput performance of IEEE 802.11 distributed coordination function (DCF) in the presence of physical-layer (PHY) inequality, i.e. varied channel conditions and/or unequal data rates determined by the Link Adaptation (LA) scheme. We present a theoretical model for DCF protocol with the LA scheme of auto rate fallback (ARF). The analysis results show that the system throughput of DCF-based WLANs is determined by the lowest data rate used with stations; throughput sharing among stations depends on the variation of link qualities rather than the difference of data rates. The simulation results validate the accuracy of our analytical model.

Keywords

IEEE standards; telecommunication standards; wireless LAN; IEEE 802.11 WLAN; auto rate fallback; channel inequality; distributed coordination function; link adaptation scheme; physical-layer inequality; system throughput; Access protocols; Analytical models; Councils; Handheld computers; Media Access Protocol; Modulation coding; Performance analysis; Physical layer; Throughput; Wireless LAN; DCF; IEEE 802.11 WLAN; performance analysis;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/T-WC.2008.070655

Filename

4686818