A unified session control protocol for IPTV services
ICACT'09 Proceedings of the 11th international conference on Advanced Communication Technology - Volume 2
Sharing enriched multimedia experiences across heterogeneous network infrastructures
IEEE Communications Magazine
Evaluating extensions to IMS session setup for multicast-based many-to-many services
Computer Networks: The International Journal of Computer and Telecommunications Networking
IPTV architecture for an IMS environment with dynamic QoS adaptation
Multimedia Tools and Applications
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As the IMS provides session establishment, QoS parameter negotiation, authentication and accounting it is an overlay architecture well qualified for session signaling concerning IPTV scenarios. The management of the signaling can be integrated as an application into an IPTV Application Server. The IPTV AS is further responsible for all necessary media signaling towards a proper IPTV media server. Such a media server is similar to the ordinary media server known from the voice centric IMS but additionally provides uni-cast, multicast and broadcast delivery of TV content which is placed by content providers. The media signaling requires a dedicated session description and can be provided by SIP or RTSP. The signaling between user and media server is orchestrated by a service-oriented-archietctue with a session manager acting as middleware. This middleware also provides interfaces for web services triggering IPTV session establishment via Parlay X gateway. This paper proposes a general IMS-based framework for delivering Live TV services over several access networks and presents the corresponding signaling flows for content enquiring and content switching as well as related delays. It furter presents an approach for using SIP and RTSP in cooperation for realizing VOD scenarios.