QOS Performance Analysis in deployment Differentiated Service with Multiprotocol Label Switching for Voice over IP

Abstract

Multiprotocol label switching is a technology use to forward traffic by using a label added to packet header, it’s better than routing protocols which do not use network resources efficiently, DiffServ has ability to prioritize traffic depends on packet header information. MPLS and DiffServ are independent techniques, but they can work together to improve the performance of network. The aim of thesis is to enhance the QOS for voice over IP packets to facing minimum delay and minimum loss, this achieve by prioritize voice packet in MPLS network. Scenarios are designed by using a simulator called OPNET, three scenarios are simulated, first scenario is Multi-Protocol Label Switching, second is MPLS with Differentiated Services (DiffServ) with weight fair queuing, the third is MPLS-Differentiated Services FIFO queuing. The study prove that MPLS-DiffServs WFQ is better than MPLS and MPLS-DiffServs FIFO in performance, bandwidth, minimum end to end delay, minimum loss, jitter and high throughput.