1. 3GPP TR 38.816 V15.0.0 - Study on CU-DU lower layer split for NR;3GPP, Tech. Rep,2017
2. 3GPP TR 38.801 V14.0.0: Study on new radio access technology: Radio access architecture and interfaces;3GPP, Tech. Rep,2017
3. Scf market forecast report;Forum,2023
4. Virtualization for small cells: Overview;Small Cell Forum,2015
5. Understanding O-RAN: Architecture, Interfaces, Algorithms, Security, and Research Challenges