Use Case Overview & Description

The objective of this case is to develop an ONAP-based SON platform using the ONAP Optimization Framework (OOF). The use case focuses on the various information models and flows/interfaces between components to enable various SON functions to be realized. It also focuses on platform enhancements such as enhancements to the Control Loop framework (e.g., Control Loop Co-ordination, different types of targets for Control Loops, etc.), enabling ML-based SON, etc.

Use Case Key Information

Requirements ProposalThis is a link to the requirements proposal made on the Requirements Sub-committeeONAP_OOF_SON_R10_Requirements_2021117_v1.1.pptx
Architecture S/C infoInformation on the Architecture sub-committee presentation

Wiki page

Prior Project "Base" WikiLink to the Honolulu release page for this use case
Requirements Jira (REQ-###) TicketLink to the REQ Jira ticket for this use case

REQ-1042 - Getting issue details... STATUS

Key Use Case Leads & Contacts
Meetings Register & RecordingsLink to Use Case Team meetings.


Executive Summary

SON (Self-Organizing Networks) functionality is an essential part of existing 4G mobility networks, and will be even more critical for 5G. SON enables automation to improve network performance and efficiency, improve user experience, and reduce operational expenses and complexity. The objective of the OOF-SON (new name for OOF-PCI) use case is to develop an ONAP-based SON platform using the ONAP Optimization Framework (OOF). We have taken a phased approach since SON is complex, and SON for 5G is still evolving. We started with the Physical Cell Identity (PCI) optimization SON use case in Casablanca, then added some centralized Automated Neighbor Relations (ANR) aspects in Dublin. In Frankfurt, we addressed some enhancements such as basic CM-notify handling (as preparation for O-RAN alignment), adaptive SON, etc. In Guilin, we introduced use of AI/ML by onboarding an offline-trained ML-model to ONAP which will provide additional inputs to PCI optimization based on historical PM data, and stabilized the functionality in Honolulu. In Istanbul, we will align FM messages with relevant standards, move to new 3GPP NRM-based yang models and leverage CPS for RAN configuration.

Business Impact

SON is an essential feature in mobility networks, and relevant to every operator. Any ONAP-based network deployment for 5G will benefit from an ONAP-based SON solution, which provides a disaggregation of SON functions into modules aligned with the ONAP architecture. Operators and vendors will both benefit from the ability of vendors to bring best-in-class solutions to each module, while leveraging the benefits of a community-supported open platform. This will enable faster development of innovative solutions. The approach taken could very well be evolved to address SON use cases whose scope extends beyond just the RAN.

Business Markets

SON for 5G is relevant to all 5G operators and markets.

Funding/Financial Impacts

SON functions reduce Opex since the automated self-organizing functions are an efficient approach to continuously optimize network configurations to improve performance and respond to network conditions.

Organization Mgmt, Sales Strategies

There are no additional organizational management or sales strategies for this beyond whatever is required for ONAP deployment to support 5G.

Development Status

PROJECTPTLUser Story / EpicRequirement

No impact

No impact

No impact

No impact

CCSDK-3532 - Getting issue details... STATUS

(Carryover work): Incorporate new Yang model in edit-config to RANSim. Stretch goal for processing CMNotify update.

DCAEGEN2-2986 - Getting issue details... STATUS

Develop stndDefined VES message formats for FM/PM/CM. 
Stretch goal to modify SON-Handler MS and RAN-Sim for FM/PM.
No impact
External API
No impact
No impact
No impact, CPS related modeling aspects will be covered by CPS project

Multi-VIM /


No impact

No impact
No impact
No impact
No impact
No impact
No impact
No impact
No impact
No impact
No impact
No impact
No impact
Models, and interface to store/retrieve OOF SON use case related data

List of PTLs:Approved Projects

*Each Requirement should be tracked by its own User Story in JIRA 


Use cases define how different users interact with a system under design.  Each use case represents an action that may be performed by a user (defined in UML as an Actor with a user persona).

Use Case Diagram Example.png

Use Case Functional Definitions

Use Case Title

Title of the Use Case

Actors (and System Components)

The list of Actors and System Components that participate in the Use Case


Short overview of the Use Case

Points of Contact

Authors and maintainers of the Use Case.

Use Case Lead, Key Use Case members and code contributors.


A list of conditions that are assumed to be true before the Use Case is invoked

Includes description of Information Consumed

Triggers / Begins when

Describes the trigger for beginning the Use Case

Steps / Flows (success)

Describes the sequence of steps and interactions that occur during the Use Case (may include: description, data exchanges, functionality, state changes)

Interaction diagrams may be included or referenced


The expected results of the execution of the Use Case

Includes description of Information Produced

Alternate / Exception Paths

Description of any exceptions or special process that could occur during Use Case

Related Use Cases

List of the Use Cases referenced by this Use Case


Describes any assumptions that are made for this use case

Tools / References / Artifacts

List of any tools or reference material associated with this Use Case as well as any JIRA trace-ability.

List of any associated diagrams or modelling artifacts associated with the Use Case


Current Status

  1. Testing Blockers

  2. High visibility bugs
  3. Other issues for testing that should be seen at a summary level
  4. Where possible, always include JIRA links

End to End flow to be Tested

**This should be a summary level Sequence diagram done in Gliffy** 

Test Cases and Status

1There should be a test case for each item in the sequence diagram


2create additional requirements as needed for each discreet step


3Test cases should cover entire Use Case


Supporting Files

Mar 29, 2021

Presentation given to Requirements Sub-committee

May 21, 2021Yang models and CPS APIs for SON (links)

SON Yang Models and CPS APIs




Add file

Nov 3, 2021ITU-T FG AN presentation on SON Use Case
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