Evaluation of Transport Services for VoIP

We study transport protocol performance from an application-specific perspective. Initially, we focus on TCP and UDP supportive role in the context of VoIP performance. Applying our metric for real-time performance, we discover that UDP has limited efficiency. Beyond UDP/TCP, we evaluate a solution-framework based on TCP protocols which incorporate variable congestion mechanisms. We also investigate VoIP traffic friendliness, as well as potential tradeoffs between protocol performance and fairness. Furthermore, we evaluate VoIP quality and protocol sensitivity versus a range of QoS parameter adjustments.