Evaluating the voice capacity of 802.11 WLAN under distributed control

Though initially designed for data transport, there is increasing interest in using the 802.11 WLAN protocol for voice and other real time services. This paper presents a performance model for voice over WLAN under distributed control. The model is based on classical decoupling arguments and allows an analytical evaluation of network capacity in terms of tuneable protocol parameters. We determine parameter settings that maximize the number of simultaneous conversations and demonstrate the significant impact on capacity of the voice packet size. Models are developed for both dedicated and integrated networks using the priority features of 802.11e

[1]  Xiaoyan Cheng,et al.  Using IEEE 802.11e MAC for QoS over wireless , 2003, Conference Proceedings of the 2003 IEEE International Performance, Computing, and Communications Conference, 2003..

[2]  T. S. Randhawa,et al.  Saturation throughput analysis of IEEE 802.11e enhanced distributed coordination function , 2004, IEEE Journal on Selected Areas in Communications.

[3]  D.J. Leith,et al.  On improving voice capacity in 802.11 infrastructure networks , 2005, 2005 International Conference on Wireless Networks, Communications and Mobile Computing.

[4]  DongyanChen,et al.  Supporting VoIP Traffic in IEEE 802 . 11 WLAN with EnhancedMedium Access Control ( MAC ) for Quality of Service , 2003 .

[5]  Fouad A. Tobagi,et al.  Capacity of an IEEE 802.11b wireless LAN supporting VoIP , 2004, 2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577).

[6]  Eitan Altman,et al.  Fixed point analysis of single cell IEEE 802.11e WLANs: uniqueness, multistability and throughput differentiation , 2005, SIGMETRICS '05.

[7]  Prathima Agrawal,et al.  Voice capacity in IEEE 802.11 networks , 2004, 2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754).

[8]  A. Girotra,et al.  Performance Analysis of the IEEE 802 . 11 Distributed Coordination Function , 2005 .

[9]  Prathima Agrawal,et al.  Voice performance in WLAN networks - an experimental study , 2003, GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489).

[10]  Sachin Garg,et al.  Can I add a VoIP call? , 2003, IEEE International Conference on Communications, 2003. ICC '03..