Fig, O-RAN alliance reference architecture

CP: Control Plane
MAC: Media Access Control
MANO: Management and Orchestration
NFVI: Network Function Virtualization Infrastructure
ONAP: Open Network Automation Platform
PDCP: Packet Data Convergence Protocol
O-Cloud: Orchestration and Cloud Platform
PHY: Physical Layer
RAT: Radio Access Technology
RF: Radio Frequency
RLC: Radio Link Control
RRC: Radio Resource Control
SDAP: Service Data Adaptation Protocol
UP: User Data Plane