Enhancing QoS Through Dynamic and Fare AP Selection in a Wireless LAN

Full Text (PDF, 302KB), PP.23-29

Views: 0 Downloads: 0

Author(s)

Fakhar Uddin Ahmed 1,* Shikhar Kumar Sarma 2

1. Department of Computer Science, LCB College, Guwahati, Assam, India

2. Department of Information Technology, Gauhati University, Guwahati, Assam, India

* Corresponding author.

DOI: https://doi.org/10.5815/ijcnis.2014.02.04

Received: 4 May 2013 / Revised: 21 Sep. 2013 / Accepted: 12 Nov. 2013 / Published: 8 Jan. 2014

Index Terms

EDCA, QoS, Contention Window, VoIP, AC

Abstract

The IEEE 802.11 WLAN is primarily used for web browsing which belongs to the category of non-real time application. But the demand of real time applications like VOIP and video conferencing has become very much common to such WLAN. With IEEE 802.11e Mac protocol it is possible to improve the QoS for both real and non-real time traffic by service differentiation. To ensure efficient utilization of the radio resources and enhanced QoS the load imbalance should be resolved among APs from different BSSs. In large scale WLAN inter AP communication mechanism can be employed along side the current admission controller under EDCA. Beside service differentiation inter AP differentiation based QoS management can lead to efficient utilization of radio resources by moving STAs from heavily laded to a less loaded AP and ensure better QoS for all types of traffics. In this paper we propose a dynamic and fair AP selection mechanism to improve the QoS in a WLAN. The simulations have been carried out with NSv2.34.

Cite This Paper

Fakhar Uddin Ahmed, Shikhar Kumar Sarma, "Enhancing QoS Through Dynamic and Fare AP Selection in a Wireless LAN", International Journal of Computer Network and Information Security(IJCNIS), vol.6, no.2, pp.23-29, 2014. DOI:10.5815/ijcnis.2014.02.04

Reference

[1]S. Choi, J. Prado, S. Mangold, and S. Shankar, “IEEE 802.11e contention-based Channel Access (EDCA) performance evaluation,” in Proc. IEEE ICC, May 2003.
[2]“Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: Medium Access Control (MAC) Quality of Service (QoS) Enhancements”, IEEE Std. 802.11e/D8.0, Feb. 2004.
[3]X Shojiro Takeuchi, Kaoru Sezaki and Yasuhiko Yasuda “Access Point Selection Strategy in IEEE802.11e WLAN Networks”.
[4]X. Chen, H. Zhai, X Tian, and Y. Fang, “Supporting QoS in IEEE 802.11e Wireless LANs”, IEEE Transactions onWireless Communications, Vol. 5, Issue 8, Page(s): 2217 -2227, August 2006.
[5]Mobility and QoS of 802.11 and 802.11e Wireless LAN Standards By Fedoua Didi1, Houda Labiod2, Guy Pujolle3, and Mohamed Feham1.
[6]Mobility and QoS of 802.11 and 802.11e Wireless LAN Standards By Fedoua Didi1, Houda Labiod2, Guy Pujolle3, and Mohamed Feham1.
[7]O. Brickley, S. Rea, and D. Pesch, Load balancing for QoS enhancement in IEEE802.11e WLANs using cell breathing techniques," in IFIP Mobile and Wireless Communication Net- works Conf., Marrakech, Morocco, Sept. 2005.
[8]The Network Simulator ns http://www.isi.edu/nsnam/ns/
[9]IEEE802.11e patch http:// www.tkn.tu-berlin.de/research/802.11e_ns2/