Title :
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
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;
Conference_Titel :
Computing, Communication, Control, and Management, 2008. CCCM '08. ISECS International Colloquium on
Conference_Location :
Guangzhou
Print_ISBN :
978-0-7695-3290-5
DOI :
10.1109/CCCM.2008.154
