O-RAN notes(1)

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

O-RAN software community: https://wiki.o-ran-sc.org/display/ORAN

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, O-RAN SC projects(Amber released 2019/11/30, Bronze planned 2020/6/5)
• 7th, TBD///