IPTV (Internet Protocol Television)
NGN Integrated IPTV (non-IMS) Architecture

The Concept of NGN integrated IPTV subsystem architecture (formerly in Release 2 called NGN dedicated IPTV subsystem) describes how to integrate IPTV functions into the NGN architecture. TISPAN NGN Integrated IPTV subsystem is what ITU-T or ATIS call non-IMS NGN based IPTV. The proposed architecture focuses on closer integration between IPTV services and features with NGN network and its subsystems (NASS, RACS, UPSF) but also migration scenarios from existing solutions (i.e. DVB-IPI, ATIS-IIF) into TISPAN NGN and common components (Figure below). Several parts of system are complied and based on existing standard like those from DVB-IPTV and in fact DVB recognizes this solution as potential architecture for easier implementation and interworking as with IMS based IPTV [36].

Core IPTV function:

Simplified TISPAN NGN dedicated IPTV subsystem functional architecture

The user can have (using his user equipment – UE, like a set-top-box STB) access to the service description (e.g. Electronic Program Guide) via SD&S service selection and discovery procedures follow DVB IPTV specification and use http protocol over the Tr reference point. The same Tr interface can be used by UE for accessing the user interface and service selection over Customer Facing IPTV application (CFIA). CFIA provides over Tr http based interface IPTV service provisioning, selection and authorization. IPTV control (IPTV-C) is enabled over Ct2 interface (http or RTSP control). Media (e.g. content on demandCoD) can be streamed by unicast or multicast over Xd from Media Delivery Function (MDF). For media control, as for example the trick play command, RTSP protocol is used via Xc by Media Control Function (MCF).