Our aim is to build an O-RAN specific Macro flow-based NSSMF which can integrate with an external NSMF.  Current ONAP slicing use case is using 3GPP 28.531 APIs (Slice-Specific APIs). In addition we would like to provide support for 3GPP 28.532 APIs (as per Generic Provisioning APIs based on Managed Object Instances (MOI))

To achieve this goal: we have made changes in SO , OOF component and have pushed additional policy using Policy Component. Also, SO macro flow is not integrated with OOF

Table of Contents

Prerequisite 

Create Policies required for NSSI selection

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Code Changes

Service Orchestration (SO) 

Code changes done in SO component  

SO api-handler 

new package ManagedObject3gppServiceInstances is created, highlights of the functionality:

• Validate the request
• Do service_recipe table lookup
• Create infraActiveRequest in requestDB
• Prepare ServiceInstanceRequest with new Resource = nssi

SO bpmn-infra

New module so-bomn-moi is created.

• In WorkflowAction class: added new workflowType = NetworkSliceSubnet
• New BPMN flows:
  • AssignRANNssiBB
  • ActivateRANNssiBB
  • ModifyRANNssiBB
  • DeleteRANNssiBB

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OOF

Existing OSDF APIs are not sufficient to support RAN NSSMF. Since, expectation is to select NSST at runtime. Hence a new API is added "selectNSST". 
NSST selection request from SO Macro flow to OOF

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There is no change in SDC NSST design , also no change in the AAI slicing model 

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