Voice Quality Testing Using VoIP Applications over 4G Mobile Networks

Nowadays, many mobile applications in the telecommunication market provide Voice over IP (VoIP), video and data services. This paper presents the performance evaluation of a 4G mobile network in the city of Pristina. This was accomplished by testing two of the most popular VoIP applications, Skype and Viber. Stationary and dynamic scenarios have been considered to evaluate the voice quality and the Quality of Experience (QoE) of both applications under the same mobile network radio conditions, throughput capacity and coverage requirements. The Mean Opinion Score (MOS) method was used to evaluate the recorded speech files based on the feedback perceptions of different users. These results were found to be very useful for the continuously increasing demand on VoIP services and applications.