Mutiple UEs Multiple gNBs on ZMQ and GNR setup

[goyban]

Hello everyone!

I want to setup 3 gNBs, and multiple UEs using ZMQ and GNR (topology provided below):

So far I got my answers about gNB <-> O5GS part by reading this discussion.
What I'm not sure about is how to configure GNR and ZMQ ports (UE <-> gNB) for the second and third gNB.
Is the configuration below correct?

1st gNB (Basically same as this tutorial) :

| Port Direction | gNB1  | UE1  | UE2  | UE3  |
| TX             | 2000  | 2101 | 2201 | 2301 |
| RX             | 2001  | 2100 | 2200 | 2300 |

2nd gNB (Should be another flow graph?):

| Port Direction | gNB2  | UE4  | UE5  |
| TX             | 3000  | 3101 | 3201 |
| RX             | 3001  | 3100 | 3200 |

3rd gNB (No Broker needed?):

| Port Direction | gNB3  | UE6  |
| TX             | 4000  | 4001 |
| RX             | 4001  | 4000 |

Thanks in advance!

[pgawlowicz]

The ports look OK.
It is important to connect them correctly so that

• the DL signal goes from gnb to gnuradio, where it is copied and send to all UEs,
• and the UL signal goes from UEs, to gnuradio where it is aggregated and sent to the gnb.

[goyban]

Thank you so much for your answer, is it correct that the third gNB doesn't need GNR since it's only 1 UE?

[pgawlowicz]

correct, you can connect it directly