What is BM-SC (Broadcast multicast service center)?

The BM-SC forms a fundamental part of the 3GPP MBMS design. It is situated between the GGSN and where the content is saved, the BM-SC is answerable for regions like group membership, content collection, QoS management. The BMSC is working as the interface between the distribution network (3G or 4G data network) and the content supplier, on other side MBMS (Multimedia Broadcast Multicast Services). The BMSC incorporates scheduling and transmission of multicast content, charging, service announcements, protection and content synchronization.