ONAP Optimization Framework (OOF) provides a policy-driven and model-driven framework for creating optimization applications for a broad range of use cases
For Casablanca, OOF enhancements include formulation and solving of optimization problems
Following test cases are for an OOF Proof of Concept (POC) for Casablanca for Physical Cell ID (PCI) Optimization
- PCI Optimization is a well-understood problem
- The reading/writing of the Physical Cell ID (PCI) configuration parameter has been included in SDNC(R) POC
Objective of the POC is to demonstrate disaggregation of the PCI SON functionality, and the data flows needed to implement this in ONAP using OOF
We envision a new PCI-Handler Microservice to facilitate the data flow and trigger mechanism
The focus of the POC is on data flow and interfaces, and the role of OOF, PCI-Handler-MS, SDNC(R) Controller and Policy etc
- Objective is to incorporate an algorithm in ONAP using OOF, not to develop an algorithm
- The POC will help to develop details of ONAP interfaces and flows needed:
(a) to get the required network data to OOF for optimization,
(b) determine the recommended reconfiguration, and
(c) execute it using the Controller

Developer Wiki > 5G - OOF (ONAP Optimization Framework) and PCI (Physical Cell ID) Optimization > image2018-7-15_22-0-46.png

Sequence Flows for OOF based PCI Optimization based on 3 different triggers:
(Flow 1) - From SO (new cell addition),
(Flow 2) - From SDNC(R) (RAN config change)
(Flow 3) - From DCAE (fault)

Functionality per component for common flows (after PCI trigger)

Step	Component	Functionality
5	PCI-Handler-MS, Policy	Fetch configuration policies PCI-Handler MS fetches policies that specify how PCI-Handler-MS will respond to triggers or requests from SO, from DCAE (via DMaaP), SDNC(R) (via DMaaP),
6	PCI-Handler-MS, OOF	Request for PCI optimization for network region. PCI-Handler MS invokes OOF for pre-defined workflow for PCI Optimization via REST API.This call includes data for the cell and the network reqion involved.
7	OOF, Policy	Fetch PCI optimization policies OOF fetches policies that specify how OOF will execute PCI optimization in response to PCI request for optimization
8a	OOF, AAI	Fetch Inventory data for cells in the region OOF fetches inventory and topology of cells in network region from AAI
8b	OOF, SDNC(R)	Fetch Config data for cells in the region OOF fetches PCI and Nbr List config data for cells in network region from SDNC(R)
9	OOF, PCI-Handler-MS	Recommended PCI configuration OOF provides PCI recommendation to PCI-Handler-MS in response to the request from
10	PCI-Handler-MS, Policy	Recommended PCI configuration PCI-Handler-MS provides PCI recommendation to Policy
11	Policy, SDNC(R)	PCI Configuration decisions Policy sends message to SDNC(R) with instruction for configuration changes
12	SDNC(R), RAN	Change PCI Configuration SDNC(R) applies config changes
13	SDNC(R), AAI	Update Inventory SDNC(R) updates inventory as needed for PCI config change