Evaluating QoS using scheduling algorithms in MPLS/VPN/WiMAX networks

Nowadays, real-time applications involving voice over IP (VoIP) and video conferencing are gaining an increasing popularity. MPLS is considered as the most used packet switching technology that ensures QoS for real-time applications with efficient use of network resources. VPN is used to connect different sites which belong to the same corporation to work as a single site. WiMAX is an emerging broadband wireless technology that is providing last-mile solutions with efficient QoS methods. Real time applications need special QoS requirements: delay, throughput, and jitter. Powerful scheduling algorithms are essential for satisfying these requirements. In this paper, QoS performance evaluation is presented based on scheduling algorithms over MPLS/VPN/WiMAX networks. We used the delay, throughput and jitter as performance metrics to discuss the effect of each scheduling algorithm in satisfying the requirements of VoIP and video conferencing.