NCTU-VT: A freeware for wireless VoIP performance measurement

Ya Chin Sung, Yi-Bing Lin*, Ren Huang Liou, Lon Fon Shieh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


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.

Original languageEnglish
Pages (from-to)318-324
Number of pages7
JournalWireless Communications and Mobile Computing
Issue number4
StatePublished - 1 Mar 2012


  • mean opinion score
  • performance measurement
  • quality of service
  • voice over IP

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