Summary

This ITU-T Recommendation specifies the network capabilities required to support the switched digital broadcast service (SDB). The service requires a point-to-multipoint function that can be provided either by the access network topology or by the addition of a specific Replication Unit (RU). Another new functional element, the Broadcast Control Unit (BCU) instructs the RU which programs have to be delivered to a specific end user. This ITU-T Recommendation provides the service architecture and the reference configuration and then specifies the different functional elements and their interfaces.