Demonstration of Standard IPTV Content Delivery Network Architecture Interfaces: Prototype of Standardized IPTV Unicast Content Delivery Server Selection Mechanisms

In this document we suggest a demonstration of standard SIP/RTSP based content delivery networks (CDN). The intended use of SIP based CDNs is in the scope of IMS based IPTV architectures that are being standardized in the open IPTV forum [1], ESTI-TISPAN and the ITU-T. The system includes a central server (content delivery network controller) analyzing all received content delivery requests. The content delivery network controller chooses the cluster of servers a request should be redirected to. The choice is made depending on client location, content availability, location and servers' global load. Each cluster is controlled by a cluster controller that would make the choice of the final VoD server to deliver the content, based on a fine grained analysis of the load of the VoD servers it manages. The system proves the feasibility of the standards and highlights the flexibility of SIP [1] interfaces when coupled with RTSP [2] to organize redirections within a CDN.