Title: SIP for Call Control in the 3G IP-Based UMTS Core Network
Abstract: This paper present an example of call control using the Session Initiation Protocol (SIP)for multimedia call management in the “all IP ” architecture for the core network of UMTS.The first part of this publication gives an overview of the 3GPP IP-based UMTS core network.The second part introduces an interworking scenario between the UMTS core network and the SIP-enabled public Internet.The current main issues are highlighted.