Effect of fading on the Performance of VOIP in IEEE 802.11 a WLANs
- 1 January 2004
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 6, 3712-3717 Vol.6
- https://doi.org/10.1109/icc.2004.1313235
Abstract
We investigate the quality of voice communication over IEEE 802.11a WLANs taking realistic channel models into account. We show that the assessment of VoIP performance is overly optimistic if fading is ignored when compared with systems where fading is taken into account. Via simulation, we derive the distribution of VoIP performance (in terms of mean opinion score-MOS) for all the data rates specified in the IEEE 802.11a standard and a range of typical signal-to-noise ratio values. We use a measure for assessing VoIP performance that includes a target level of user-satisfaction and a bound on the probability of not achieving this target. The impact of retransmissions and channel estimation errors on VoIP performance is also discussed.Keywords
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