Summary

Recommendation ITU-T H.644.5 specifies the functional architecture and related functional components of content request routing/redirecting service (CRRS), and the reference points of a CRRS within a multimedia content delivery network (MCDN). With consideration for different network environments, content/service types and user/terminal device profiles, this Recommendation also presents potential solutions with the procedures for CRRS to complete the end-user-to-MCDN node attachment in the case of Internet protocol television (IPTV) service (dedicated network), over the top (OTT) media service (public/open Internet) and mobile media streaming service such as 5G network with mobile/multi-access edge computing (MEC) enabled service.

Using Recommendation ITU-T H.644.5, a MCDN service provider and manufacturer can deploy their MCDN node, especially the edge node, deeper into a network edge. The CRRS provides a comprehensive solution to guide users to find the nearest MCDN node for accessing the request content by ignoring the differentiation of network, service type and terminal device and user's location.