This paper reports an NGIN (Next Generation Intelligent Network) service architecture which enables service convergence; in other words, the convergence at service level is achieved by using one single service platform to service both PSTN and IMS users at the same time. For PSTN users only voice service is provided, while for IMS (IP Multimedia Subsystem) users both voice and video services can be delivered, depending on CPE capabilities. Service platform can be either IN SCP (Service Control Point) or SIP AS (Application Server). The major contribution of this paper is to verify the feasibility and demonstrate the advantages of NGIN service architecture in the course of IN service evolution.
Intelligent Network NGN Next Generation Network IMS IP Multimedia Subsystem SIP Session Initiation Protocol NGIN Next Generation Intelligent Network SCI Service Convergence Service Architecture