A simulation-based comparative evaluation of transport protocols for SIP

Research presented in this paper uses the Network Simulator, ns2, to investigate the direct effects and subsequent consequences associated with the use of different transport protocols in a SIP context. Specifically, we seek to perform a comparative evaluation of UDP, TCP and SCTP based on a model simulating a scenario most likely to benefit from congestion control and error correction mechanisms associated with the reliable transport protocols. The overall aim of this paper is to make a contribution to the information available for the appraisal of such protocols in respect of real world implementations.