O-RAN Overview


The course provides a technical overview of O-RAN as specified by the O-RAN Alliance. The course describes the O-RAN architecture and terminology, central functions and concepts like SMO, Non-RT RAN Intelligent Controller, Near-RT RAN Intelligent Controller (with xApps), O-CU, O-DU, O-RU and the O-Cloud.

Relevant interfaces, protocols and procedures are described, along with a few use case examples. The motives and objectives for O-RAN are outlined, as well as O-RAN’s relationship to 3GPP and the 3GPP technical specifications.


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

Note: This course is under development and the content may be subject to changes.

3GPP RAN Architecture

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

Main O-RAN Architecture

  • Objectives and overall vision
  • Building blocks: SMO, Non-RT RIC, Near-RT RIC, E2 Nodes and O-Cloud
  • gNB split into O-CU-CP, O-CU-UP, O-DU and O-RU
  • Main Interfaces and protocols
  • Relation to 3GPP specifications

Service Management and Orchestration (SMO) and Non-RT RAN Intelligent Controller (Non-RT RIC)

  • Purpose and role
  • Non-RT RIC
  • OAM Functions
  • Relevant Interfaces: A1 and O1
  • AI (Artificial Intelligence) and ML (Machine learning) fundamentals
  • Selected Use Cases

The A1 Interface

  • The A1AP Protocol
  • Policies, Enrichment Information and AI/ML models

Near-RT RAN Intelligent Controller (Near-RT RIC)

  • Purpose and role
  • xApps
  • Other Near-RT RIC functionalities
  • Relevant Interfaces: A1 and E2

The E2 Interface and the E2 Nodes

  • E2 Nodes
  • The E2AP Protocol and the Open Fronthaul protocol

OAM and the O1 and O2 Interfaces and O-Cloud

  • OAM (Operation and Maintenance) functions in SMO
  • The O1 interface and NETCONF
  • Management Entities, Managed Elements and Managed Functions
  • The O2 interface
  • O-Cloud; locations and contents

Duration: 2 days


Classroom training: $1730

Virtual classroom training: $1730

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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