Abstract

Transmitting a good quality voice over wireless networks is a challenge for service providers. Long Term Evolution (LTE), also known as one of the beyond 4G wireless network technology, is designed to have a greater delivery service for multimedia, voice, and video applications to end users. Therefore, modern cellular networks are expected to support both voice and a growing volume of data traffic. However, LTE architecture does not support native circuit switching services and relies on the IP Multimedia Subsystem (IMS) for supporting voice. Voice over Internet Protocol (VoIP) is particularly used in LTE for the delivery of the voice. In fact, one of the major challenges for VoIP over LTE is to guarantee the Quality of Service (QoS) of the VoIP calls. However, the QoS of the Voice/video/multimedia in the intricacy wireless network was studied and comparisons among the scheduling algorithms were made in this study. The evaluation of a single and thereafter multi-cells was considered for different flows such as Best Effort, VoIP and Video in mobile environment (at low and high speeds) using the LTE-Simulator. Our simulation results showed that the performance of the scheduling algorithms could enhance voice (and video) delivery quality.

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