Performance-driven evaluation for deploying IMS-based interoperability scenarios

This paper deals with the performance evaluation of deploying an IMS-based media plane interoperability framework. The 3GPP standards describe two possible operating modes based on either a reactive or a proactive approach. We show that both approaches entail some advantages and drawbacks in terms of signaling overhead and call setup times at different ratios of incompatible calls. A prototype implementation of the required elements was carried out in order to use experimental delay contributions. Additionally, the evaluation focuses on the impact of deploying the interoperability solutions over current UMTS and LTE radio access networks.