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Evaluation of Quality of Service in VoIP Traffic Using the E Model

Abstract:

Real-time applications such as Voice over IP (VoIP) are very sensitive to variables such as jitter, delay and packet loss. The Quality of Service (QoS) together with the available bandwidth allows to have a quality service, which added to the Quality of User Experience (QoE) provides a way to evaluate the communication. In this work we evaluate the variables delay, jitter and packet loss in VoIP application, together with the QoE (R factor and MOS) of the user using the E model. The variables of delay, jitter and packet loss were measured in three scenarios where the channel was saturated and the bandwidth was limited, to determine the relationship between two QoS variables: delay and jitter with respect to the R factor. Finally, the QoS and QoE that allows early detection of quality degradation in a VoIP call was evaluated, taking into account factors such as bandwidth and codec.