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.. Copyright (C) 2020 Nordix

Requirements for the Non-RT RIC project
=======================================

Find detailed description of what Non-RT RIC is on this `page`_.

.. _page: https://wiki.o-ran-sc.org/display/RICNR/

There are functional requirements emitted by O-RAN WG2 for the Non-RT RIC, which are the following:

#. 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.

The non-functional requirements are the following ones:

#. 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.

Moreover, there are functional requirements regarding the A1 interface:

#. 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.