This Recommendation describes: Scenarios for the support of IPTV services to nomadic end users taking into account the requirements identified in [ITU-T Y.1901] and the functional architecture defined in [ITU-T Y.1910]. These scenarios are established based upon assumptions which are provided in this Recommendation; Functional architectures, reference points and information flows based on the scenarios identified in this Recommendation. Scope of this Recommendation is limited to the IPTV services provided through unicast delivery. The IPTV services provided through multicast delivery are out of scope of this Recommendation. The use of this Recommendation requires contractual agreements among involved parties, e.g., end user, service provider, network provider and content provider, whose description is beyond the scope of this Recommendation.