Risks:
- E2SM Specification baseline is still not available while the development is being done using draft specifications
- WLS, FAPI interface files baseline - FAPI interface development is dependent on this
- UE Attach Scenario development - in medium risk due to the effort needed to complete the development
Status:
O-DU High layers (MAC, RLC and app):
- Re-align seed code to 3GPP Release 15.3.0
- Align seed code to WG8 AAD specification and interfaces - WIP
- Implementation of cell broadcast procedure and UE attach procedure (SA mode)
for FDD mode and FR1 (Numerology = 0, Bandwidth = 20 MHz) and basic scheduler APIs for single UE and single HARQ transmission
F1-U interface development - WIP
E2 Traffic Steering implementation based on draft specification - WIP
F1-C interface enhancement: WIP
- Support for following additional F1AP messages:
- Initial UL RRC Message Transfer
- UL/DL RRC Message Transfer
- UE Context Setup Request/Response
- Enhance F1AP messages:
- F1AP Setup Request/Response
- GNB DU Config Update
Basic FAPI messages Implementation
Out of Scope:
- Use cases – Traffic Steering, Health Check related messages and call flows
- TDD functionality, NSA
- End to end testing
Limitations/Dependencies:
- FAPI Implementation – Dependency on O-DU Low to open source WLS files, interface files
- Testing: Currently only some unit testing can be done due to lack test infrastructure i.e UE or UE simulator, O-RU, O-CU and core components.