Study of QoS Management Techniques for Voice Applications

Abstract

In recent years, Voice over IP has influences on global telecommunication. Voice and multimedia applications delivery services remain a major and challenging task for network researchers and designers. VoIP packets are sensitive to packet losses and transmission delay to assure correct communication. Optimal Quality of Services provisioning for coexisted and aggregated traffic flows in networks is still demanding problem. This paper discusses Qos management techniques for VoIP applications. Several important techniques like flow classification, load balancing, routing policies, congestion control and packet loss recovery has been studied. Finally, three routing policies like Single path routing, two phase routing and multipath routing with forward error correction are simulated using Ns2 simulator and the results are shown to identify the best routing policy.