1, O-RAN Architecture overview
O-RAN alliance link: https://www.o-ran.org/
O-RAN Specifications link: https://www.o-ran.org/specification-access
2, O-RAN Workgroups and Specifications Overview
There are 9 WGs within O-RAN
WG1: overall architecture, OaM, UC(user cases) and Slicing
WG2: nonRT(non-real-time) RIC, A1 interface and UC(user cases)
WG3: nearRT(near-real-time) RIC, E2 interface
WG4: Open FH(front-haul)
WG5: 3GPP F1/W1/E1/X2/Xn interfaces
Note: W1 is for ng-eNB-CU and ng-eNB-DU, similar to F1 for gNB-CU and gNB-DU (refer to 3GPP 37.47x specs)
WG6: Cloud and Virtualization
WG7: Indoor Picocell
WG8: SW architecture and API of O-DU/O-CU (similar to 38.300)
WG9: Open X-Haul(? no spec yet)
3, Learning Plan
- 1st, O-RAN overall architecture from WG1
- 2nd, O-RAN SW architecture and API from WG8
- 3rd, O-RAN OaM from WG1
- 4th, O-RAN RIC and A1/E2 interface from WG2/WG3
- 5th, O-RAN Cloud and Virtualization from WG6
- 6th, TBD//