Performance evaluation of VoIP broadcasting over LTE for varying speeds and distances of mobile nodes

The exponential increase in smartphone use has caused a paradigm shift in the Internet access pattern from traditional applications to VoIP, video streaming, and social networking. These changes urge the demand for high-speed mobile network access technologies day-by-day. In this paper, we evaluate the performance of Long Term Evaluation (LTE) network for VoIP application, focusing primarily on downlink (broadcasting mode). We studied the implementation details of LTE from user perspective and used a network simulator, SimuLTE, to perform various simulations. We measure the VoIP QoS by varying speed, distance (from the eNodeB) and number of mobile nodes. Metrics used include packet delay, delay variation (jitter), packet loss, and Mean Opinion Score (MOS). We observed that LTE provides good VoIP quality in broadcasting mode and less affected by varying number of users, distance, and speed.