The Combined Effect of Signal Strength and Background Traffic Load on Speech Quality in IEEE 802.11 WLAN
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Date
2011-04
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Společnost pro radioelektronické inženýrství
Abstract
This paper deals with measurements of the combined effect of signal strength and background traffic load on speech quality in IEEE 802.11 WLAN. The ITU-T G.729AB encoding scheme is deployed in this study and the Distributed Internet Traffic Generator (D-ITG) is used for the purpose of background traffic generation. The speech quality and background traffic load are assessed by means of the accomplished PESQ algorithm and Wireshark network analyzer, respectively. The results show that background traffic load has a bit higher impact on speech quality than signal strength when both effects are available together. Moreover, background traffic load also partially masks the impact of signal strength. The reasons for those findings are particularly discussed. The results also suggest some implications for designers of wireless networks providing VoIP service.
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Radioengineering. 2011, vol. 20, č. 1, s. 174-178. ISSN 1210-2512
http://www.radioeng.cz/fulltexts/2011/11_01_174_178.pdf
http://www.radioeng.cz/fulltexts/2011/11_01_174_178.pdf
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Peer-reviewed
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en