Introduction to O-RAN Architecture

 

ORAN ARCHITECTURE:

 

 NODES:

• O-CU-CP
  
• O-DU
• O-RU
• O-Cloud
• Non-RT RIC
  
• Near-RT RIC
• O-ENB

 Note:

CU : Control Unit
CP: Control Plane
DU : Distributed Unit
RU : Radio Unit

INTERFACES: 

• E1: This interface is between the gNB-CU-CP and gNB-CU-UP
• E2: This interface is between  near-RT RIC and an E2 Node
• F1-C: This interface is between the gNB-CU-CP and gNB-DU
• F1-U:  This interface is between the gNB-CU-UP and gNB-DU
• A1: This  interface is between Non-RT-RIC and the Near-RT RIC functions
• O1: This interface is between O-RAN Managed Element and the management entity
• O2: This interface is between the SMO and O-Cloud
• X2-C: This interface is used for transmitting control plane information between eNBs or between eNB and en-gNB in EN-DC
• X2-U: This interface is used for transmitting user plane information between eNBs or between eNB and en-gNB in EN-DC
• NG-U: This interface is between the gNB-CU-UP and the UPF
• NG-C: This interface is between the gNB-CU-CP and the AMF

ORAN Spec link : https://orandownloadsweb.azurewebsites.net/specifications