NG application protocol information for cell broadcast (NG-AP-CB): Subset of NG-AP information that the AMF relays between the AN and the CBCF. NG-AP-CB corresponds to a subset of NG-AP defined in TS 38.413.
NG application protocol (NGAP): Application layer protocol between the NG-RAN node and the AMF. The NGAP protocol is defined in TS 38.413.
SCTP for the control plane (SCTP): This protocol guarantees delivery of signalling messages between AMF and NG-RAN (N2). SCTP is defined in RFC 4960.
HTTP/2: Application layer protocol for Service based interface between AMF and CBCF. HTTP/2 is defined in RFC 7540.