Voice capacity analysis of WLAN with unbalanced traffic

Author

Cai, Lin X. ; Shen, Xuemin ; Mark, Jon W. ; Cai, Lin ; Xiao, Yang

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Victoria, BC

Volume

55

Issue

3

fYear

2006

fDate

5/1/2006 12:00:00 AM

Firstpage

752

Lastpage

761

Abstract

An analytical model to study the performance of wireless local area networks (WLANs) supporting asymmetric nonpersistent traffic using the IEEE 802.11 distributed coordination function mode for medium access control (MAC) is developed. Given the parameters of the MAC protocol and voice codecs, the voice capacity of an infrastructure-based WLAN, in terms of the maximum number of voice connections that can be supported with satisfactory user-perceived quality, is obtained. In addition, voice capacity analysis reveals how the overheads from different layers, codec rate, and voice packetization interval affect voice traffic performance in WLANs, which provides an important guideline for network planning and management. The analytical results can be used for effective call admission control to guarantee the quality of voice connections. Extensive simulations have been performed to validate the analytical results

Keywords

access protocols; computer network management; telecommunication congestion control; telecommunication network planning; telecommunication traffic; voice communication; wireless LAN; IEEE 802.11 distributed coordination function mode; MAC protocol; asymmetric nonpersistent traffic; call admission control; infrastructure-based WLAN; medium access control; network management; network planning; unbalanced traffic; user-perceived quality; voice capacity analysis; voice codec rate; voice connections; voice packetization interval; voice traffic performance; wireless local area networks; Access protocols; Analytical models; Capacity planning; Codecs; Communication system traffic control; Media Access Protocol; Performance analysis; Speech analysis; Traffic control; Wireless LAN; IEEE 802.11 DCF; unbalanced traffic; voice capacity;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/TVT.2006.874145

Filename

1634907