OOF Guilin (R7) Architecture Review

Owned by krishna moorthy
Last updated: Aug 16, 2020
3 min read

1. Project Overview

ONAP Optimization Framework (OOF) is an Umbrella project, with the primary goal of addressing the optimization needs of ONAP. OOF is a framework that supports creating and running a suite of Optimizing applications including: 

  • Change Management Scheduling optimizer

  • Homing/Placement optimizer

  • PCI optimizer

  • Route optimizer

OOF is targeted to be an optimization platform with the following goals:

  • Declarative, policy-driven approach to solving optimization problems

  • Reusable components: data and policy adapters/libraries, execution environment

  • Support General-Purpose as well as Custom optimizers

  • Extensible to multiple optimization problems

Internally, OOF has the following components: 

  • OSDF: Optimization Service Design Framework, which is a collection of APIs and libraries, along with a generic runtime optimizer

    • Status: Part of ONAP since Beijing Release.

  • HAS: Homing and Allocation Service, which provides a policy based constraint driven selection optimizer

    • Status: Part of ONAP since Beijing Release.

  • CMSO: Change Management Schedule Optimizer, providing schedule optimization

    • Status: Seed code up-streamed in R3

  • FGPS: Fine Grained Placement Service

    • Status: Seed code up-streamed, POC in Frankfurt

2. Functional enhancements for Guilin

The key functional enhancements planned for Guilin are as follows:  

  • Enhancements for E2E Network Slicing use case

  • Support for MDONS use case

  • Support for ML based SON optimization 

  • CCVPN route optimization for Transport Slicing

3. Architecture Diagram (Functional view)

OOF Architecture - Guilin (same as in Frankfurt)



OSDF architecture in Guilin

Deployment architecture (update for ML model)

4. New and modified interfaces

OOF provides the following interfaces:

The current API documents can be found at:

Changed interfaces

Interface Name

Interface Definition

 Interface Capabilities

Interface Name

Interface Definition

 Interface Capabilities

OOFE-4

Route Optimization

Provides an interface for Router Optimization.

Support for inter-domain route optimization.

OOFE-6

Network Slicing

This interface enables slice selection recommendations (NST, NSI, NSSI, Slice Profiles). It also provides support for Slice termination (NSI, NSSI) recommendations.

Unchanged interfaces

Interface Name

Interface Definition

 Interface Capabilities

Interface Name

Interface Definition

 Interface Capabilities

OOFE-1

  • Homing

  • Traffic Distribution

It enables placement based on a wide variety of policy constraints including capacity, location, platform capabilities, and other service-specific constraints. 

OOFE-2

PCI/ANR Optimization

Enables PCI/ANR optimization API for SON.

OOFE-3

Schedule Optimization

a policy-driven workflow schedule optimizer for change management planning. This interface schedule workflows in time to maximize parallel change management activities, while respecting dependency between the workflows.

OOFE-5

OOF Model Administrator

This is for the OOF Model Administrator API.  This API is a way to dynamically change the optimization models that will be used to find solutions for various optimization problems.  This API will be used to Create, Update or Delete Models.

Consumed interfaces

OOF consumes the following Interfaces:

Interface Name

Purpose Reason For Use

Interface Name

Purpose Reason For Use

SDNCE-1

For PCI/ANR optimization, OOF Retrieves the Cellsite inventory details from the configdb API, which is hosted as part of the SDNC/R component

AAIE-1

OOF interfaces with AAI to retrieve the inventory

MCE-5

OOF queries Multicloud for real-time available capacity information

MUSICI-1

OOF interfaces with MUSIC to persist service state.

SDCE-1

OOF interfaces with SDC to retrieve slice template information

DESE-1

OOF interfaces with DES to retrieve the KPI data of the cells for ML-based decision making.

Note:   xxxI interface is a Component internal interface.  xxxxE interface is a component external interface

5.  System limits

Please find the known system limitations in the following links

6. Involved use cases, architectural capabilities or functional requirements

  • Usecases

    • Service/VNF instantiation

    • HPA

    • Change Management - Traffic Distribution

    • 5G / OOF SON 

    • 5G / Network Slicing

    • CCVPN

    • MDONS 

7. Platform Maturity Targets

Guilin Release Platform Maturity

In-addition, following activities are being worked for Guilin.