ABSTRACT
NGN-Based IPTV Systems ........................................................... 391 14.1.3 Requirements on Interconnections
NGN-Based IPTV Systems..................................................... 393 14.2 IPTV Roaming Interconnect from Service Perspective ........................ 395
14.2.1 IPTV Service from Roaming Perspective ................................... 395 14.2.2 Linear TV, Broadcast TV ............................................................... 396 14.2.3 Trick Play of Live TV Stored in Network ................................... 396 14.2.4 Time-Shift TV Service Served by Network ................................ 397 14.2.5 CoD Service .................................................................................... 397 14.2.6 Advanced PVR ............................................................................... 397 14.2.7 User Generated Content-UGC ................................................... 398
14.3 Roaming Scenarios for NGN-Based IPTV Services .............................. 399 14.3.1 IMS-Based IPTV Architecture and Functional Entities ........... 399
14.3.1.1 Service Discovery and Selection Functions (SDF and SSF) ...................................................................400
