Enhanced Voice Service (EVS) Codec Using TCP Reno in Voice over Internet Protocol in LTE Network

Abstract

Voice over Internet protocol (VoIP) is one of the online streaming method to provide voice communication that is used in the organization voice operation or conference call. In recent years, researcher developed several methods for improving the voice quality; but it still faces some problems of high jitter, delay and low throughput. In this paper, a VoIP is introduced to enable voice calls on Long Term Evolution (LTE). The Enhanced Voice Service (EVS)-Transmission Control Protocol (TCP) Reno-VoIP (EVS-TCP Reno-VoIP) method is introduced for enhancing the voice quality on LTE network. The EVS codec is used for improving the voice service and TCP Reno is used to avoid voice congestion in the LTE network. The testbed experiments on voice based skype application is implemented for LTE network. The network traffic is computed using the Jperf software. The Quality of Service (QoS) of the VoIP over LTE is analysed in Network Simulator 2 (NS2). The multiple scenarios were simulated to compute and analyse the performances in terms of an end to end delay, throughput, jitter and packet loss. The simulation results showed that EVS-TCP Reno-VoIP method has improved 2-3.5% of network performance compared to existing methods such as EVS codec, G-11, G-723 and SDSS.