.. SPDX-License-Identifier: CC-BY-4.0
.. Copyright (C) 2020 Nordix
-Requirements for the Non-RT RIC project
-=======================================
+.. |archpic| image:: ./images/nonrtric-architecture-D.png
+ :alt: Image: O-RAN SC - NONRTRIC Overall Architecture
-Find detailed description of what Non-RT RIC is on this `page`_.
+Summary
+-------
-.. _page: https://wiki.o-ran-sc.org/display/RICNR/
+The Non-RealTime RIC (RAN Intelligent Controller) is an Orchestration and Automation function described by the O-RAN Alliance for non-real-time intelligent management of RAN (Radio Access Network) functions. The primary goal of the Non-RealTime RIC is to support non-real-time radio resource management, higher layer procedure optimization, policy optimization in RAN, and providing guidance, parameters, policies and AI/ML models to support the operation of near-RealTime RIC functions in the RAN to achieve higher-level non-real-time objectives. NONRTRIC functions include service and policy management, RAN analytics and model-training for the near-RealTime RICs. The NONRTRIC project provides concepts, specifications, architecture and reference implementations as defined and described by the `O-RAN Alliance <https://www.o-ran.org>`_ architecture.
-There are functional requirements emitted by O-RAN WG2 for the Non-RT RIC, which are the following:
+The O-RAN-SC NONRTRIC implementation communicates with near-RealTime RIC elements in the RAN via the A1 interface. Using the A1 interface the NONRTRIC will facilitate the provision of policies for individual UEs or groups of UEs; monitor and provide basic feedback on policy state from near-RealTime RICs; provide enrichment information as required by near-RealTime RICs; and facilitate ML model training, distribution and inference in cooperation with the near-RealTime RICs.
-#. Non-RT RIC shall support data retrieval and analysis; the data may include performance, configuration or other data related to the application (recommended data shown in required data section for different use cases).
-#. Non-RT RIC shall support relevant AI/ML model training based on the data in 1. for non-real-time optimization of configuration parameters in RAN or Near-RT RIC, as applicable for the use case.
-#. Non-RT RIC shall support relevant AI/ML model training based on the data in 1. for generating/optimizing policies and intents to guide the behavior of applications in Near-RT RIC or RAN, as applicable for the use case.
-#. Non-RT RIC shall support training of relevant AI/ML models based on the data in 1. to be deployed/updated in Near-RT RIC as required by the applications.
-#. Non-RT RIC shall support performance monitoring and evaluation.
-#. Non-RT RIC shall support a fallback mechanism to prevent drastic degradation/fluctuation of performance, e.g. to restore to the previous policy or configuration.
+|archpic|
-The non-functional requirements are the following ones:
+Find detailed description of the NONRTRIC project see the `O-RAN SC NONRTRIC Project Wiki <https://wiki.o-ran-sc.org/display/RICNR/>`_.
-#. Non-RT RIC shall not update the same policy or configuration parameter for a given Near-RT RIC or RAN function more often than once per second.
-#. Non-RT RIC shall be able to update policies in several Near-RT RICs.
+NONRTRIC components
+-------------------
-Moreover, there are functional requirements regarding the A1 interface:
+These are the components that make up the Non-RT-RIC:
-#. A1 interface shall support communication of policies/intents from Non-RT RIC to Near-RT RIC.
-#. A1 interface shall support AI/ML model deployment and update from Non-RT RIC to Near-RT RIC.
-#. A1 interface shall support communication of enrichment information from Non-RT RIC to Near-RT RIC.
-#. A1 interface shall support feedback from Near-RT RIC for monitoring AI/ML model performance.
-#. A1 interface shall support the policy/intents feedback from Near-RT RIC to Non-RT RIC.
+* Non-RT-RIC Control Panel / Dashboard
+* A1 Policy Management Service (developed in ONAP)
+* A1/SDNC Controller & A1 Adapter (Controller plugin)
+* Enrichment Information Coordinator
+* Non-RT-RIC (Spring Cloud) Service Gateway
+* Non-RT-RIC (Kong) Service Exposure Prototyping
+* Initial Non-RT-RIC App Catalogue
+* Near-RT-RIC A1 Simulator
+
+The code base for "D" Release is in the `NONRTRIC <https://gerrit.o-ran-sc.org/r/admin/repos/nonrtric>`_, `NONRTRIC-ControlPanel <https://gerrit.o-ran-sc.org/r/admin/repos/portal/nonrtric-controlpanel>`_, and `Near-RT-RIC A1-Simulator <https://gerrit.o-ran-sc.org/r/admin/repos/sim/a1-interface>`_ , Gerrit source repositories (D Branch).
+
+Non-RT-RIC Control Panel / NONRTRIC Dashboard
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Graphical user interface
+
+* View and Manage A1 policies in the RAN (near-RT-RICs)
+* Interacts with the Policy agent’s NBI (REST API)
+* Graphical A1 policy creation/editing is model-driven, based on policy type’s JSON schema
+* View and manage producers and jobs for the Enrichment coordinator service
+* Configure A1 Policy Management Service (e.g. add/remove near-rt-rics)
+* Interacts with the A1-PolicyManagementService & A1-EI-Coordinator (REST NBIs) via Service Exposure gateway
+
+Implementation:
+
+* Frontend: Angular framework
+* Repo: *portal/nonrtric-controlpanel*
+
+Please refer the developer guide and the wiki to set up in your local environment.
+
+More details available at the `NONRTRIC-Portal documentation site <https://docs.o-ran-sc.org/projects/o-ran-sc-portal-nonrtric-controlpanel>`_
+
+A1 Policy Management Service (from ONAP CCSDK)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+A1 Controller Service above A1 Controller/Adaptor that provides:
+
+* Unified REST & DMaaP NBI APIs for managing A1 Policies in all near-RT-RICs
+
+ + Query A1 Policy Types in near-RT-RICs
+ + Create/Query/Update/Delete A1 Policy Instances in near-RT-RICs
+ + Query Status for A1 Policy Instances
+
+* Maintains (persistent) cache of RAN’s A1 Policy information
+
+ * Support RAN-wide view of A1 Policy information
+ * Streamline A1 traffic
+ * Enable (optional) re-synchronization after inconsistencies / near-RT-RIC restarts
+ * Supports a large number of near-RT-RICs (& multi-version support)
+
+* Converged ONAP & O-RAN-SC A1 Adapter/Controller functions in ONAP SDNC/CCSDK (Optionally deploy without A1 Adaptor to connect direct to near-RT-RICs)
+* Support for different Southbound connectors per near-RT-RIC - e.g. different A1 versions, different near-RT-RIC version, different A1 adapter/controllers supports different or proprietary A1 controllers/EMSs
+
+See also: `A1 Policy Management Service in ONAP <https://wiki.onap.org/pages/viewpage.action?pageId=84672221>`_
+
+A1/SDNC Controller & A1 Adapter (Controller plugin)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Mediation point for A1 interface termination in SMO/NONRTRIC
+
+* Implemented as CCSDK OSGI Feature/Bundles
+* A1 REST southbound
+* RESTCONF Northbound
+* NETCONF YANG > RESTCONF adapter
+* SLI Mapping logic supported
+* Can be included in an any controller based on ONAP CCSDK
+* Continues to support both a dedicated OSC A1-controller persona and an ONAP SDNC persona
+
+See also: `A1 Adapter/Controller Functions in ONAP <https://wiki.onap.org/pages/viewpage.action?pageId=84672221>`_
+
+Enrichment Information Job Coordination Service
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Coordinate/Register A1-EI Types, Producers, Consumers, and Jobs.
+
+* Maintains a registry of:
+
+ - A1-EI Data Types / schemas
+ - A1-EI Producers
+ - A1-EI Consumers
+ - A1-EI Jobs
+
+* A1-EI Query API (e.g. per producer, per consumer, per types)
+* Query status of A1-EI jobs
+* Monitors all near-RT-RICs and recovers from inconsistencies
+* After EI-type/Producer/Consumer/Job is successfully registered delivery/flow can happen directly between A1-EI Producers (in SMO/NONRTRIC domain) and A1-EI consumers (near-RT-RICs in RAN domain)
+* *Being extended to coordinate non-A1 Enrichment Information exchange between NONRTRIC Apps*
+
+Non-RT-RIC (Spring Cloud) Service Gateway
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Support Apps to use A1 Services
+
+* `Spring Cloud Gateway <https://cloud.spring.io/spring-cloud-gateway>`_ provides the library to build a basic API gateway
+* Exposes A1 Policy Management Service & Enrichment Coordinator Service.
+* Additional predicates can be added in code or preferably in the Gateway yaml configuration.
+
+Implementation:
+
+* Implemented as a Java Spring Cloud application
+* Repo: *portal/nonrtric-controlpanel*
+
+
+Non-RT-RIC (Kong) Service Exposure Prototyping
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Support Apps to use NONRTRIC, SMO and other App interfaces
+A building block for coming releases as the R1 Interface concept matures
+
+* Support dynamic registration and exposure of service interfaces to Non-RT-RIC applications (& NONRTRIC Control panel)
+* Extends a static gateway function specifically for NONRTRIC Control panel (described above)
+* Initial version based on `Kong API Gateway <https://docs.konghq.com/gateway-oss>`_ function
+* Initial exposure candidates include A1 (NONRTRIC) services & O1 (OAM/SMO) services
+
+NONRTRIC Kubernetes deployment - including Kong configurations can be found in the OSC `it/dep <https://gerrit.o-ran-sc.org/r/gitweb?p=it/dep.git;a=tree;f=nonrtric/helm;hb=refs/heads/master>`_ Gerrit repo.
+
+Initial Non-RT-RIC App Catalogue
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Register for Non-RT-RIC Apps.
+
+* Non-RT-RIC Apps can be registered / queried
+* Limited functionality/integration for now
+* *More work required in coming releases as the rApp concept matures*
+
+Initial K8S Helm Chart LCM Manager
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Onboard, start, stop, and modify Non-RT-RIC App µServices as Helm Charts
+*A building block for coming releases as the R-APP concept matures*
+
+* Interfaces that accepts Non-RT-RIC App µServices Helm Charts
+* Support basic LCM operations
+* Onboard, Start, Stop, Modify, Monitor
+* Initial version co-developed with v. similar functions in ONAP
+* *Limited functionality/integration for now*
+
+A1 Interface / Near-RT-RIC Simulator
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Stateful A1 test stub.
+
+* Used to create multiple stateful A1 providers (simulated near-rt-rics)
+* Supports A1-Policy and A1-EnrichmentInformation
+* Swagger-based northbound interface, so easy to change the A1 profile exposed (e.g. A1 version, A1 Policy Types, A1-E1 consumers, etc)
+* All A1-AP versions supported
+
+Implementation:
+
+* Implemented as a Python application
+* Repo: *portal/nonrtric-controlpanel*
+
+More details available at the `A1 Simulator documentation site <https://docs.o-ran-sc.org/projects/o-ran-sc-sim-a1-interface>`_
Code Review / nonrtric.git / blobdiff