Study on enhancements to IMS Centralized Services (ICS)
The following aspects of IMS Centralized Services (ICS), though studied in Release 8 (and to some extent documented in TR 23.892 [2]), required further study and are herein documented:
- ICS supplementary service data management (e.g. Supplementary Services data synchronization).
- Management of Telephony Application Server (TAS) user configuration for an ICS UE when PS access cannot be used.
Consideration shall be given to attaining a consistent user experience, and managing and enforcing operator policies as well as user preferences. Heterogeneous access technologies over which the IMS service is provided shall also be taken into account.