---
# System prepended metadata

title: '3rd task 01.08.22 the OAI itself consisted of DU and CU if you look at the following figure:'
tags: [Internship 2nd level]

---

# 3rd task 01.08.22 the OAI itself consisted of DU and CU if you look at the following figure:
###### tags: `Internship 2nd level`

![](https://i.imgur.com/D5BIClR.png)

**Resources:**
- [OAI 5G Standalone Mode](https://www.youtube.com/watch?v=2ScsJfnvLd0)
- [NSA and SA developments](https://www.youtube.com/watch?v=hSEANp5x0k8)
- [OAI 5G RAN PROJECT GROUP](https://openairinterface.org/oai-5g-ran-project/)
- [TESTING_5GSA_setup.md](https://gitlab.eurecom.fr/oai/openairinterface5g/-/blob/develop/doc/TESTING_5GSA_setup.md)
- [What is CU and DU in 5G](https://www.5gworldpro.com/5g-knowledge/what-is-cu-and-du-in-5g.html)


# The sketch to compare the architecture of OAI gNB (CU/DU mode) versus O-RAN gNB.

![](https://imgur.com/1KqpLcy.jpg)

OAI gNB uses Fronthaul compare to O-RAN gNB which uses Fronthaul O-FH. Both of them uses own logical nodes which also different, you can see it on the scetch.
 Another comparison is FlexRIC.  FlexRIC integrate with OAI’s 5G cellular radio stack. For O-RAN, FlexRIC E2-agent compatibility with the O-RAN RIC.
Meanwhile, they both uses F1 interfaces , which includes F1-C - control plane and F1-U - user plane, for connection CU to DU for OAI and  O-CU to O-DU for O-RAN
 
 
