caa a22 4500 605448035 CHVBK 20210128100135.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s11042-014-1895-4 doi (NATIONALLICENCE)springer-10.1007/s11042-014-1895-4 Analysis of the quality of experience of a commercial voice-over-IP service [Elektronische Daten] [Toon De Pessemier, Isabelle Stevens, Lieven De Marez, Luc Martens, Wout Joseph] Voice-over-IP (VoIP) services, enabling users to make cheap phone calls using the Internet, are becoming increasingly popular, not only on desktop computers but also on mobile devices such as smartphones that are connected through mobile networks. Users' perception of the level of quality plays a key role in making a VoIP service to succeed or to fail. This paper demonstrates the influence of technical parameters (such as the audio codec, type of data network, and handovers during the call), device characteristics (such as the platform, manufacturer, model, and operating system), and application aspects (such as the software version and configuration) on the subjective quality of a commercial VoIP service. The relative influence of all these parameters is determined and a decision tree combines these results in order to assess the subjective quality. Combining a large number of objective parameters in a decision tree to determine the user's subjective evaluation of the quality of a VoIP call is a novel and complex procedure. The subjective quality, in turn, has an influence on the duration of the call, and as a result an influence on the usage behavior of the service. The users' assessment of the service quality is not evaluated by merely taking a snapshot of the perceived quality at one moment in time but rather by analyzing the perceived quality over a longer period of time during service usage, which has not been done up to now. Analyzing the VoIP service using a regression analysis over a period of 120 days showed that the perceived quality decreases slightly when the user utilizes the service more often and gets more familiar with it. Springer Science+Business Media New York, 2014 VoIP nationallicence User experience nationallicence QoE nationallicence Mobile nationallicence De Pessemier Toon Department of Information Technology, iMinds - Ghent University, WiCa, G. Crommenlaan 8 box 201, 9050, Ghent, Belgium aut Stevens Isabelle Department of Communication Sciences, iMinds - Ghent University, MICT, Korte Meer 7-9-11, 9000, Ghent, Belgium aut De Marez Lieven Department of Communication Sciences, iMinds - Ghent University, MICT, Korte Meer 7-9-11, 9000, Ghent, Belgium aut Martens Luc Department of Information Technology, iMinds - Ghent University, WiCa, G. Crommenlaan 8 box 201, 9050, Ghent, Belgium aut Joseph Wout Department of Information Technology, iMinds - Ghent University, WiCa, G. Crommenlaan 8 box 201, 9050, Ghent, Belgium aut Multimedia Tools and Applications Springer US; http://www.springer-ny.com 74/15(2015-08-01), 5873-5895 1380-7501 74:15<5873 2015 74 11042 https://doi.org/10.1007/s11042-014-1895-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11042-014-1895-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- De Pessemier Toon Department of Information Technology, iMinds - Ghent University, WiCa, G. Crommenlaan 8 box 201, 9050, Ghent, Belgium aut NATIONALLICENCE 700 1- Stevens Isabelle Department of Communication Sciences, iMinds - Ghent University, MICT, Korte Meer 7-9-11, 9000, Ghent, Belgium aut NATIONALLICENCE 700 1- De Marez Lieven Department of Communication Sciences, iMinds - Ghent University, MICT, Korte Meer 7-9-11, 9000, Ghent, Belgium aut NATIONALLICENCE 700 1- Martens Luc Department of Information Technology, iMinds - Ghent University, WiCa, G. Crommenlaan 8 box 201, 9050, Ghent, Belgium aut NATIONALLICENCE 700 1- Joseph Wout Department of Information Technology, iMinds - Ghent University, WiCa, G. Crommenlaan 8 box 201, 9050, Ghent, Belgium aut NATIONALLICENCE 773 0- Multimedia Tools and Applications Springer US; http://www.springer-ny.com 74/15(2015-08-01), 5873-5895 1380-7501 74:15<5873 2015 74 11042