Analysis of Performance of Differentiated Service for Multimedia Traffic

Abstract

Quality of Service (QoS) techniques are applied in IP networks to utilize available network resources in the most efficient manner to minimize delays and delay variations (jitters) in network traffic having multiple type of services. Multimedia services may include voice, video and database. Researchers have done considerable work on queuing disciplines to analyze and improve QoS performance in wired and wireless IP networks. This research highlights QoS analysis in a wired IP network withmore realistic enterprise modeling. Threedifferent applications are used i.e. FTP, Voice over IP(VoIP) and Video Conferencing (VC). Three major queuingdisciplines are evaluated i.e. ‘FIFOQueuing’ ‘Priority Queuing’ and ‘WeightedFair Queuing’ for packet identification. The simulation results show thatWFQ has an edge over PQ in terms of queuing delays and jittersexperienced by low priority services. For high priority trafficdependency of ‘Traffic Drop’ and ‘Packet DelayVariation’ on selected buffer sizes is simulated and discussed toevaluateQoS deeper.