NDLI: Impact of Wireless Channel on VoIP QoS and Admission Regions in IEEE 802.11g WLANs

Content Provider	IEEE Xplore Digital Library
Author	Gnassou, A. Frigon, J.-F. Sanso, B.
Copyright Year	2008
Description	Author affiliation: Electr. Eng. Dept., Ecole Polytech. de Montreal, Montreal, QC (Gnassou, A.; Frigon, J.-F.; Sanso, B.)
Abstract	In this paper, we evaluate the impact of the wireless channel and physical layer parameters on the performance of VoIP traffic in IEEE 802.11g networks. The wireless channel is modeled using a finite state Markov chain based on an adaptive modulation and coding scheme. The transition probabilities encompass the effects of the time-varying wireless channel, such as the Doppler frequency and the operating SNR, and the physical layer target packet error rate. This model is implemented inthe NS-2 tool and used to analyze the QoS (delay and packetdrop rate) of real-time multimedia traffic in realistic wireless channels. Numerical results showing the physical layer impact on the number of supported VoIP calls in an 802.11g network are presented. We also demonstrate that the admission region in the presence of mixed VoIP and data remains linear, even after considering the complex wireless channel effects.
Starting Page	63
Ending Page	68
File Size	306794
Page Count	6
File Format	PDF
ISBN	9780769533933
DOI	10.1109/WiMob.2008.72
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-12
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless communication Fading Error analysis QoS admission region Quality of service VoIP Physical layer wireless channel Delay Signal to noise ratio
Content Type	Text
Resource Type	Article

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