Summary

Recommendation ITU-T F.743.4 gives an overview and the requirements for a virtual content delivery network (VCDN). Appendix I provides two use cases to show how to apply VCDN scenario.

Compared with the traditional content delivery network (CDN) service provisioning defined in Recommendations ITU‑T Y.1901 and ITU-T Y.2019, VCDN is a new paradigm using cloud computing, network virtualization and software defined networking (SDN) technology for content delivery for various multimedia services, providing a  CDN infrastructure according to vendors' needs. This Recommendation specifies the requirements for VCDN, including requirements on service provision, physical resource management, virtual resource management, VCDN logically isolated network partition (LINP) management, service management, backbone network and security consideration.