DU¶
As outlined in the Knowledge Base section discussing the DU, there are two main components to the DU: the DU-high and DU-low.
The srsRAN Project DU follows the architecture seen in the Knowledge Base, with the addition of the DU Manager. This results in the DU having the following architecture:
From this we can clearly see how the DU is split into the DU-high and DU-low, with the following main components and interfaces:
Components:
DU Manager: This is an srsRAN Project specific component and implementation
F1AP-DU: The DU specific implementation of the F1AP
RLC: Radio Link Control
MAC: Medium Access Control
Interfaces:
E2: Interfaces with the nRT RIC
F1-c: Interfaces with the CU control plane
F1-u: Interfaces with the CU user plane
FAPI: Interface between the DU-high and DU-low
Note
These are discussed in detail in the Interfaces section