This chart is part of Netmanias report, "Open vs. Proprietary 5G Fronthaul Interface: SK Telecom Case", which was published at 11th January 2018.
Click here to view the full report.
Sources: IEEE 1914.3 RoE, xRAN Forum and Telecom Infra Project
Open base station is reality now and inevitable for future RAN deployments. CPRI fronthaul is virtually dead.
Notice that one more interface will be introduced: E1 between CU-UP and CU-CP. See TR 38.806.