scope:

The present document describes the Procedures on the Functional Entities and Call Flows for the protocols and their possible enhancements to support IPTV services based on the architecture and stage 2 information flows described in TS 182 027 [2].

The possible enhancements of protocols will define the scope of new or enhanced protocol specifications.

Besides, the interaction with other Simulation Service will be considered.

NOTE: The present document relies on the architectural framework defined in TS 182 027 [2] for IMS-based IPTV Stage 2 and may need to be updated once the open issues identified in the present document are resolved.

The present document is applicable to:

• the interface between the User Equipment (UE) and the Call Session Control Function (CSCF);

• the interface between the S-CSCF and IPTV Service Control Functions (SCF);

• the interface between the S-CSCF and IPTV Service Discovery Functions (SDF);

• the interface between the S-CSCF and the Media Control Functions (MCF);

• the interface between the User Equipment (UE) and IPTV Service Selection Functions(SSF);

• the interface between the User Equipment (UE) and Elementary Control Functions (ECF)/Elementary Forwarding Functions (EFF);

• the interface between the User Equipment (UE) and IPTV Service Control Functions (SCF).