Architecture

Introduction

The CCSDK ORAN components add support for handling “A1 Policies” as defined for the O-RAN A1-P interface.

The O-RAN A1-P interface is defined and specified by the O-RAN Alliance

Architecture Review

This picture provides a overview of ONAP’s A1 Controller architecture, integration with other components and API resource/operation provided.

../_images/ONAP-A1ControllerArchitecture.png

The A1 Policy Management Service provides an API for accessing of A1 Policies. The A1-PMS configures A1-Policies in RAN nodes (near-RT RICs). It also keeps a synchronized copy of these in case the A1-PMS needs to restart. Periodically A1-PMS will check that the configured A1 Policies and A1 Policy Types are consistent with those in the managed near-RT RICs (and take action if not).

Communications to near-RT RIC can be tunneled through a CCSDK/SDNC controller, using our SDNC A1-Adapter plugin.

The A1-PMS now also supports fine-grained access control checks, whereby access requests can be forwarded to an external authorization provider.

More details can be found in Developer Guide.

Developer Guide

Technical information about the O-RAN components (dependencies, configuration, running & testing) can be found in Developer Guide.