Assessing Call Quality of VoIP and Data Traffic over Wireless LAN
نویسندگان
چکیده
In this paper, we evaluate the quality of speech over a wired-cum-wireless scenario with the presence of various non-VoIP flows by simulations. The quality is mainly determined in terms of network impairments (e.g. one-way delay, jitter and packet loss). Besides, Mean Opinion Score (MOS) and EModel defined by ITU-T are also employed to assess call quality. In the experiments, it is essential for us to present the difference between a variety of codecs (e.g. G.711/G.723.1/iLBC) with the help of some impairments and understand the maximum number of voice calls for different codecs in 802.11b wireless networks. Finally, we give a suggestion on how to tradeoff between the quality of speech and the maximum number of voice calls in Wireless LANs
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