.. This work is licensed under a Creative Commons Attribution 4.0 International License.
.. http://creativecommons.org/licenses/by/4.0
-.. Copyright (C) 2020 Nordix
+.. Copyright (C) 2021 Nordix
Use Cases
=========
For more information about it, see the README file in the use case's folder.
-.. image:: ./images/healtcheck.png
+.. image:: ./images/healthcheck.png
+
+O-RU closed loop recovery
+-------------------------
+
+This use case is a non-real-world closed-loop use case to demonstrate automated recovery when the front-haul connection between an O-DU and O-RU is reset.
+An application in the NONRTRIC senses the fault from the O-RU (O1-FM) and initiates a NETCONF reset operation (O1-CM) using the OAM controller.
+More details about the use case can be found on the O-RAN SC wiki: `(RSAC) <https://wiki.o-ran-sc.org/pages/viewpage.action?pageId=20878423>`_ and `(OAM) <https://wiki.o-ran-sc.org/display/OAM/Closed+loop+use+case>`_.
+
+Non-RT RIC provides two implementation versions of the recovery part of the use case. One in the form of a python
+script, and one utilizing the ONAP Policy Framework.
+
+Standalone Script Solution
+++++++++++++++++++++++++++
+The script version consists of a python script that performs the tasks needed for the use case. There are also two
+simulators. One message generator that generates alarm messages, and one SDN-R simulator that receives the config
+change messages sent from the script and responds with alarm cleared messages to MR.
+
+All parts are Dockerized and can be started as individual containers, in the same network, in Docker.
+
+The script based solution can be found in
+this `link <https://gerrit.o-ran-sc.org/r/gitweb?p=nonrtric.git;a=tree;f=test/usecases/oruclosedlooprecovery/scriptversion;b=HEAD>`_.
+
+ONAP Policy Solution
+++++++++++++++++++++
+
+There is also another solution for performing the fronthaul recovery that is based on ONAP Policy Framework.
+A TOSCA Policy has been created that listens to DMaaP Message Router and sends a configuration change message via
+REST call to the OAM controller. The policy based solution can be
+found `here <https://gerrit.o-ran-sc.org/r/gitweb?p=nonrtric.git;a=tree;f=test/usecases/oruclosedlooprecovery/apexpolicyversion;b=HEAD>`_.
+
+There is a `docker-compose <https://gerrit.o-ran-sc.org/r/gitweb?p=nonrtric.git;a=tree;f=docker-compose/docker-compose-policy-framework;b=HEAD>`_ available
+in the nonrtric repo for bringing up the complete standalone version of ONAP Policy Framework.
+
+The detailed instructions for deploying and running this policy are provided in
+the `wiki <https://wiki.o-ran-sc.org/pages/viewpage.action?pageId=35881325>`_.
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