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Browsing by Author "Shieh, Lon-Fon"

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    NCTU-VT: a freeware for wireless VoIP performance measurement
    (2012-03-01)
    Sung, Ya-Chin
    ;
    Lin, Yi-Bing
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    Liou, Ren-Huang
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    Shieh, Lon-Fon
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    資訊工程學系
    Voice over IP (VoIP) is a promising low-cost voice communication over the wireless IP network. To provide satisfactory VoIP services, the Quality of Service (QoS) of the wireless network should be guaranteed. This paper proposes a VoIP performance measurement freeware called NCTU VoIP Testing Tool (NCTU-VT). We compare NCTU-VT with two commercial tools SmartVoIPQoS and IxChariot in terms of packet loss, latency, and Mean Opinion Score (MOS) of the VoIP sessions in Wi-Fi network. Our study indicates that these three tools can accurately measure VoIP performance in Wi-Fi environment. Copyright (c) 2010 John Wiley & Sons, Ltd.