O-RAN Overview – 1 or 2 days


The course provides a technical overview of O-RAN as specified by the O-RAN Alliance. The motives and objectives for O-RAN are described as well as O-RAN’s relationship to 3GPP and the 3GPP technical specifications.

The course describes the O-RAN architecture and terminology, central functions and concepts like SMO, Non-Real Time RAN Intelligent Controller, Near-Real Time RAN Intelligent Controller, O-Cloud, Radio Network Information Base and xApps. Relevant interfaces and protocols are described. A number of signaling sequences will be presented during the course in order to account for central procedures and use-cases.


Basic knowledge of 5G NG-RAN architecture is highly recommended.

What is O-RAN?

  • History and objectives
  • Overall vision
  • The O-RAN Alliance

3GPP RAN Architecture

  • C-RAN according to 3GPP
  • gNB-CU and gNB-DU
  • the E1 and F1 interfaces

Main O-RAN Architecture

  • Building blocks
  • Interfaces and protocols
  • Simple use case example
  • Relation to 3GPP specifications

Service Management and Orchestration (SMO)

  • Purpose, role and responsibilities
  • Non-Real Time RAN Intelligent Controller (RIC)
  • Other functions: Design, Inventory, Policy, Configuration
  • The A1 Interface
  • The O1 Interface

The Near-Real Time RAN Intelligent Controller (RIC)

  • Purpose, role and responsibilities
  • Included functions: xApps, Radio Connection mgmnt, Mobility mgmnt, QoS mgmnt, Interference mgmnt, AI/ML Trained Models, Radio Network Information Base
  • Relevant Interfaces

The E2 Interface and the E2 Nodes

  • E2 Nodes:
  • E2 Protocol and procedures

The O2 Interface and O-Cloud

  • Protocol and procedures

Selected Use Cases (from O-RAN specs)

  • Traffic Steering
  • QoE (Quality of Experience)
  • QoS based resource optimization

We offer substantial discounts for group bookings, and we have corporate rates with most of the operators and equipment suppliers in the world.

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