Abstract
IEEE 802.11e standard is a concrete attempt to QoS challenge, but when the volume of traffic flows increases, this approach is not sufficient. Several techniques have been developed to improve WLAN QoS performance, mainly introducing a trade-off between performance and standard compatibility. This work describes the techniques used to enhance EDCA efficiency by suitably regulating standard’s parameters and it introduces an innovative algorithm, named Dynamic TXOP (DTXOP), capable of enhancing fairness between upstream and downstream resource allocation in Wi-Fi networks. Finally, after a brief review of admission control algorithms for QoS support under heavy traffic loads, a suitable admission control scheme is integrated with DTXOP as a possible solution for facing QoS degradation of active sources due to an excessive network load. The benefits obtained by integrating DTXOP and the proposed admission control policy are shown in terms of QoS enhancement and efficiency in resource allocation.
Similar content being viewed by others
References
IEEE Std. 802.11e-2005, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications. Amendment 8: Medium Access Control (MAC) Quality of Service Enhancements, IEEE Std. 802.11e, 2005.
M. Davcevski and T. Janevski, Analysis of IEEE 802.11e QoS in Multimedia Environment, in Proceedings of IEEE International Conference on Telecommunications in Modern Satellite, Cable, and Broadcasting Services (TELSIKS), 2005.
S. Choi, J. Del Prado, N. Sai Shankar, and S. Mangold, IEEE 802.11e Contention-Based Channel Access (EDCF) Performance Evaluation, in Proceedings of the IEEE International Conference on Communications (ICC), 2003.
M. Thottan and M.C. Weigle, Impact of 802.11e EDCA on Mixed TCP-based Applications, in Proceedings of the International Wireless Internet Conference (WICON), 2006.
A. Nafaa, Provisioning of multimedia services in 802.11-based networks: facts and challenges, IEEE Wireless Communications, Vol. 14, No. 5, pp. 106–112, 2007.
J. Majkowski and F.C. Palacio, Dynamic TXOP configuration for Qos enhancement in IEEE 802.11e wireless LAN, in Proceedings of the International Conference on Software, Telecommunications and Computer Networks (SoftCOM), 2006.
A. Banchs, A. Azcorra, C. Garcia and R. Cuevas, Applications and challenges of the 802.11e EDCA mechanism: an experimental study, IEEE Network, Vol. 19, No. 4, pp. 52–58, 2005.
A. Grilo and M. Nunes, Performance Evaluation of IEEE 802.11e, in Proceedings of the 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Vol. 1, pp. 511–517, 2002.
H. Liu and Y. Zhao, Adaptive EDCA Algorithm Using Video Prediction for Multimedia IEEE 802.11e WLAN, in Proceedings of the IEEE International Conference on Wireless and Mobile Communications (ICWMC), 2006
A. Ksentini, A. Nafaa, A. Gueroui and M. Naimi, ETXOP: a resource allocation protocol for QoS-sensitive services provisioning in 802.11 networks, ELSEVIER’s Performance Evaluation (PEVA), Vol. 64, No. 5, pp. 419–443, 2007.
K. O. Stoeckigt and H. L. Vu, VoIP capacity—analysis, improvements, and limits in IEEE 802.11 Wireless LAN, IEEE Transaction on Vehicular Technology, Vol. 59, No. 9, pp. 4553–4563, 2010.
Y. Xiao and H. Li, Local data control and admission control for ad hoc wireless networks, IEEE Transaction on Vehicular Technology, Vol. 53, No. 5, pp. 1558–1572, 2004.
X. Chen, H. Zhai, X. Tian and Y. Fang, Supporting QoS in IEEE 802.11e Wireless LANs, IEEE Transactions on Wireless Communications, Vol. 5, No. 8, pp. 2217–2227, 2006.
Y. Xiao and H. Li, Evaluation of distributed admission control for the IEEE 802.11e EDCA, IEEE Communication Magazine, Vol. 42, No. 9, pp. S20–S24, 2004.
J. Zhu and A. O. Fapojuwo, A new call admission control method for providing desired throughput and delay performance in IEEE802.11e wireless LANs, IEEE Transactions on Wireless Communications, Vol. 6, No. 2, pp. 701–709, 2007.
B. Bensaou, Z. Kong, and D. Tsang, A Measurement-Assisted, Model-Based Admission Control Algorithm for IEEE 802.11e, in The International Symposium on Parallel Architectures, Algorithms, and Networks, 2008
S.-M. Kim, Y.-J. Cho and Y. K. Kim, Admission control scheme based on priority access for wireless LANs, Computer Networks, Vol. 54, No. 1, pp. 3–12, 2010.
A. Andreadis and R. Zambon, QoS Enhancement for Multimedia Traffics with Dynamic TXOPlimit in IEEE 802.11e, The 3-rd ACM International Workshop on QoS and Security for Wireless and Mobile Networks (Q2SWinet), 2007.
A. Andreadis, G. Benelli, and R. Zambon, An Admission Control Algorithm for QoS Provisioning in IEEE 802.11e EDCA in Proceedings of the IEEE International Symposium on Wireless Pervasive Computing (ISWPC), 2008.
S. Mangold, S. Choi, P. May, O. Klein, G. Hiertz, and L. Stibor, IEEE 802.11e Wireless LAN for Quality of Service, in Proceedings of European Wireless, 2002.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Andreadis, A., Zambon, R. Improving QoS Performance in IEEE 802.11e Under Heavy Traffic Loads. Int J Wireless Inf Networks 19, 49–61 (2012). https://doi.org/10.1007/s10776-011-0162-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10776-011-0162-0