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- A1 Termination hosting A1 interface to A1 Policy Mangaement Service in SDN-R
- ran-app abstraction of xApp hosted on Near-RT RIC
- Websocket interface from ran-app to RANSim Controller to provide E2-like interaction from xApp to CU/DU.
More details are provided in : A1 Support in RanSim Simulator
Figure 2: Rel11 RAN-Sim functional architecture for ONAP Rel11 with (a) northbound O1 interface support (netconf config and PM/FM/CM VES) from CU/DU RAN NF modules, and (b) northbound A1 interface support from A1 Termination and ran-app abstraction of xApps hosted on Near-RT RIC controlling the CU/DU modules.
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