DVB-IPTV Content Download Services - IPTV services anytime and anywhere

IPTV services have been widely deployed by network operators around the world over the last years. Real-time streaming of Linear TV and Video-on-Demand (VoD) offerings, especially in the now more and more popular High Definition quality, however puts a high burden on the network and content servers concerning bandwidth, Quality-of-Service, processing performance and scalability if 100.000 s of user have to be supported simultaneously. While multicast delivery can cope with some of these problems for Linear TV services, the unicast VoD services cannot take advantage of that and especially the request for on-demand content is expected to substantially grow in the future. With the introduction of Content Download Services (CDSs), operators now have the option to provide IPTV services in innovative ways: They can provide high-quality video services to users with limited access bandwidth, offload the streaming request for blockbuster movies at peak times from the VoD servers or provided personalized advertisements for insertion into a live program event in advance to the users set-top box. The Digital Video Broadcast (DVB) Project has recently finalized its CDS specification. DVB CDS supports push and pull delivery models with unicast, multicast and peer-to-peer distribution to enable various business models and use cases. In this work we introduce the standardized technology, its architecture and map it to the use cases and business models.