Study on Stage 2 aspects of Optimised Service Charging and Allocation of Resources (OSCAR) in the IP Multimedia Subsystem (IMS) whilst roaming
The present document provides a study into the new (Rel-11) requirements identified by SA WG1 to allow a home network to control a visited network to perform the following IMS functions for its subscribers:
- conferencing (network hosted);
- transcoding;
- tone insertion; and
- announcement insertion.