SVTA Published Document
SVTA2065: Open Casting
About This Document
Delegating content delivery to a downstream Content Delivery Network (CDN), typically
operated and exposed by a telecom operator, provides a quality of experience
enhancement, as the physical distance from the client to the cache server is shortened. However, this does not eliminate the possibilities for problems. In cases of massive/large events, or simply a high level of concurrent usage, the downstream CDN may experience overloading. Exposing and offering a multicast delivery service, possibly in conjunction with the unicast CDN, is a win/win model that reduces the pressure on the Downstream CDN (dCDN) and offers a better quality of experience (scalable delivery) for the Upstream CDN (uCDN).
This document specifies the way to operate the Open Caching Application Programming
Interface (API) and possibly extend it allowing a uCDN and a dCDN to exploit and expose a multicast delivery service respectively according to [SVTA2104].
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