Performance Analysis and Optimization of IEEE 802.11 DCF with Constant Contention Window

Author

Wang, Ruopeng ; Zhang, Jie ; Zou, Xiangyi

Author_Institution

Sch. of Electr. & Inf., Northwestern Polytech. Univ., Xian

Volume

2

fYear

2008

fDate

3-4 Aug. 2008

Firstpage

407

Lastpage

411

Abstract

In this paper, a novel MAC protocol, DCF with constant contention window (DCF/CCW), is proposed for IEEE 802.11 WLANs. Firstly a mathematical model is presented to analyse the throughput and access delay of DCF/CCW. The analysis shows that the performance of DCF/CCW differs much with different network scales. And a further analysis shows it is easily to obtain the optimal CCW for a given network scale in order to maximize the system throughput. The proposed optimization mechanism, optimal-DCF/CCW, is just based on this knowledge to select optimal CCWs for different network scales. Simulation results show that compare with IEEE 802.11 DCF, optimal-DCF/CCW makes a significant improvement of throughput and access delay.

Keywords

access protocols; optimisation; wireless LAN; IEEE 802.11 DCF; MAC protocol; WLAN; access delay; constant contention window; distributed coordination function; mathematical model; optimization mechanism; performance analysis; system throughput; Access protocols; Analytical models; Communication system control; Content management; Counting circuits; Delay; Mathematical model; Media Access Protocol; Performance analysis; Throughput; Ad Hoc; Contention Window; Dcf; Ieee 802.11;

fLanguage

English

Publisher

ieee

Conference_Titel

Computing, Communication, Control, and Management, 2008. CCCM '08. ISECS International Colloquium on

Conference_Location

Guangzhou

Print_ISBN

978-0-7695-3290-5

Type

conf

DOI

10.1109/CCCM.2008.154

Filename

4609716