ITU-T H.644.5 PDF

This Recommendation specifies the functional architecture with related functional components, reference points and comprehensive solutions for the multimedia content delivery network (MCDN) content/user request routing/redirecting service, with consideration of the variety of service/content types, networking environments, terminal devices and so on.

The scope of this Recommendation comprises:

1) The functional architecture and the related components of content request routing/redirecting service (CRRS) and the related networking architecture.

2) The potential reference points and the protocols between CRRS and other function entities, e.g., content distribution and delivery system, service platform including mobile/multiaccess edge computing (MEC) enabled platform, Local DNS terminal device, etc.

3) The candidate content request routing/redirecting mechanism by considering the location of user and MCDN node (including virtualized CDN node and MEC-CDN node), e.g., in the dedicated network & internet, fixed & mobile (IMT-2020) network environment or other possible networking conditions.