O-RAN : RAN Intelligent Controller (Near-RT) Overview

 NEAR-RT RIC Architecture

 

 

Services Provided by Near-RT RIC:

Service Category	Service Name	Description
A1 related services	A1 EI service	This service enables the service consumer to create/update/delete/audit subscriptions to A1 Enrichment Information. It also enables the service consumer to query the Near-RT RIC platform of the supported A1 EI type(s) and the created A1 EI job(s).
E2 related services	E2 Subscription service	This service enables the service consumer to create/delete an E2 subscription related to applicable RIC services [2] with Near-RT RIC platform. The subscribed information is delivered with E2 Indication service. This service also enables the service consumer to be queried or notified of deleting an existing E2 subscription. (NOTE 1) (NOTE 2)
	E2 Indication service	This service enables the service consumer to receive subscribed E2 information associated with an E2 subscription.
	E2 Control service	This service enables the service consumer to access RIC service “CONTROL” [2] with the Near-RT RIC platform.
	E2 Guidance service	This service enables the service consumer to acquire E2 guidance information from the Near-RT RIC platform to avoid conflicts described in clause 6.2.3.
Management related services	xApp Registration service	This service enables service consumer to register/deregister itself with the Near-RT RIC platform.
SDL services	SDL Information service	This service enables the service consumer to store and retrieve data while hiding details such as type and location of database, management operations of database layer such as high availability, scaling, load-balancing. This service supports defined data structures used to provide E2 Node related information.
Enablement services	Enabl Registration service	This service enables service consumer to register its service.
	Enabl Discovery service	This service enables service consumer to discover services registered by the Near-RT RIC platform and the xApps.
	Enabl Event service	This service enables the service consumer to create/delete subscriptions to Near-RT RIC API related events. It also enables notifications of the subscribed Near-RT RIC API related events.
AI/ML workflow services	Data Pipelining service	This service enables the service consumer to ingest and prepare data for AI/ML model training and/or inference with the Near-RT RIC platform.
	AI/ML Model Management and Exposure service	This service enables the service consumer to store and, retrieve AI/ML models with the Near-RT RIC platform for inference and/or training, The service also supports exposure of shared AI/ML models.
	AI/ML Training service	This service enables the service consumer to train AI/ML models with the Near-RT RIC platform.
	AI/ML Inference service	This service enables the service consumer to perform AI/ML inference with the Near-RT RIC platform.
NOTE 1: Support for E2 interface Global Procedures (E2 SETUP, RIC Service Update, etc.) is described in clause 9.5.8 as use cases of SDL services. NOTE 2: Addition Conflict Mitigation related messages are not specified in the present document (i.e., for "analysis results").