Improved VoLTE QoE Estimation Procedure using Network Performance Metrics

In this paper a new method to improve the mathematical estimation of Quality of Experience (QoE) perceived by the end user of a Voice call over LTE (VoLTE) is presented. The new estimation leads to Mean Opinion Score (MOS) values more realistic than those available on network monitoring processes. The optimization of the QoE is calculated as a function of several QoS parameters, in particular packet loss, network jitter delay and jitter buffer dimension. The improvement has been realized by identifying the QoE and QoS parameters, named respectively Key Quality Indicators (KQI) and Key Performance Indicators (KPI), for VoLTE services, and then applying a QoE/QoS mathematical relationship in order to adjust the expected QoE level on the basis of QoS.