The 3GPP Packet Switch Streaming (PSS) provides a framework for Internet Protocol (IP) based streaming applications
in by specifying protocols and codecs within the 3GPP system. Protocols for control signalling, capability exchange,
media transport, rate adaptation and protection are specified. Codecs for speech, natural and synthetic audio, video, still
images, bitmap graphics, vector graphics, timed text and text are specified.
The 3GPP Multimedia Broadcast and Multicast Service (MBMS) provides a framework for broadcast and Multicast
streaming and download applications in 3GPP networks supporting the MBMS bearer service. The MBMS user
services are enabled by a set of specified media codecs, formats and transport/application protocols. MBMS user
services are built on top of the MBMS bearer service. There are two delivery methods for the MBMS user services:
download and streaming.
The 3GPP IP Multimedia Subsystem (IMS) enables the deployment of IP multimedia applications. PSS and MBMS
User Services are IP multimedia services but they were specified before IMS. IMS brings enablers and features to
operators and subscribers that can enhance the experience of PSS and MBMS User Services.
The purpose of the present document is the specification of use of the IMS to initiate and control PSS and MBMS User
Service. This should enable deployment of PSS and MBMS user services as IMS services. Note that the present
specification uses components of the 3GPP PSS, 3GPP MBMS , ETSI TISPAN IPTV and Open IPTV Forum standards