Method, system and devices for multimedia delivering in content delivery networks

摘要

A Content Deliver Network (CDN) is provided with Multicast cache pre-filling. An origin server (101) communicating with a multicaster agent (102) collects media objects to be delivered through the CDN to surrogate servers (104, 104', 104") which deliver media objects to user terminals (105, 105', 105") requesting them. The multicaster agent (102) is provided with the media objects and subsequent media objects associated with a same web resource. The surrogate servers (104, 104', 104") can decide, based on response information from the multicaster agent (102), upon whether to use a multicast channel, sent by the multicaster agent (102) and associated with the web resource, with the media segments packaged into. The decision can depend on cache load, network bandwidth, media demand, etc. Multicast/broadcast channels are created with cacheable objects to serve media requests and allow surrogate server (104) to act as Web cache without requiring analyze requests and compute responses.