DocumentCode :
3354253
Title :
A Comparative Study of Dynamic Adaptation Algorithms for Enhanced Service Differentiation in IEEE 802.11 Wireless Ad Hoc Networks
Author :
Gannoune, Lassaâd
Author_Institution :
EIVD, Rue de Cheseaux 1, CH-1400 Yverdon-les-Bains, Switzerland
fYear :
2006
fDate :
19-25 Feb. 2006
Firstpage :
31
Lastpage :
31
Abstract :
EDCA is a contention-based channel access scheme defined in the IEEE 802.11e standard, and is part of HCCA for infrastructure networks, however it may be used as a separate coordination function for wireless ad-hoc networks. In this paper, we present two main schemes that extend EDCA with a dynamic adaptation algorithm enabling each station to tune the size of the CWmin used in its back-off algorithm at run time. The performance of the IEEE 802.11e EDCA, enhanced with our adaptation algorithms, is extensively investigated by simulations and compared with other contention window adaptation schemes, such as, Adaptive EDCF (AEDCF), and Slow Decrease (SD) schemes. Results obtained indicate that our CWmin adaptation schemes outperform basic EDCA, AEDCF and SD in terms of channel utilization, throughput, and packet delay. We show through simulations that the delays for high priority and medium priority access categories decrease by up to 63% and up to 96% respectively. We also show that the total throughput increases by up to 24%, and channel capacity is at least 30% higher as compared to EDCA.
Keywords :
EDCA/EDCF; IEEE 802.11e; QoS; back-off algorithm; contention window; dynamic adaptation.; Ad hoc networks; Channel capacity; Delay; Heuristic algorithms; Intelligent networks; Personal digital assistants; Quality of service; Throughput; Traffic control; Wireless LAN; EDCA/EDCF; IEEE 802.11e; QoS; back-off algorithm; contention window; dynamic adaptation.;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Telecommunications, 2006. AICT-ICIW '06. International Conference on Internet and Web Applications and Services/Advanced International Conference on
Print_ISBN :
0-7695-2522-9
Type :
conf
DOI :
10.1109/AICT-ICIW.2006.4
Filename :
1602163
Link To Document :
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