The O-RAN ALLIANCE e.V. specifies profiles for 3GPP RAN interfaces to achieve interoperability among different vendors. So far, profiles for open X2, open Xn, and open F1 interfaces have been published.
- Open X2 enables operators providing 5G Non-StandAlone to introduce 5G NR base stations (gNBs) independently of the vendor providing 4G LTE base stations (eNBs).
- Open Xn allows operators providing 5G StandAlone to introduce gNBs from different vendors in the same geographical area.
- Open F1 provides similar multi-vendor benefits as the open fronthaul but at the higher layer split between CU and DU