A Comparison of Voice-over-IP Capacity and Performance for Different Scheduling Techniques

Abstract

To ensure Quality of Service (QoS), different scheduling techniques play a very vital role for Voice over IP (VoIP) traffic. The traffic for VoIP service is constant bit traffic and has low latency, which implies that small VoIP packets are imparted in the typical duration of time. Also, for QoS related to packet delay and packet loss, the Voice over IP packet needs to be anticipated periodically. Dynamic scheduling is used for packet scheduling in the Evolved UTRAN (E-UTRAN) type of radio systems. In present work, we will compare different type of scheduling techniques such as dynamic scheduling, persistent scheduling, and semi-persistent (with SID packets) scheduling used for VoIP packets in Long Term Evolution (LTE). We try to find out the number of users supported for different Control Channels (CC) with and without restrictions. The results show that semi-persistent scheduling is the most efficient scheduling as it helps in better-optimized resource utilization while dynamic scheduling has a large amount of signaling involved which reduces its efficiency. Persistent scheduling technique fails to utilize the resource as compared to semi-persistent scheduling. VoIP capacity related to the number of users is calculated for Semi-persistent Scheduling without any condition on control channels and as a result, we observed some prominent data.