Maximum Number of Supported UEs in srsRAN

[Ali78k]

Hey Community. What is the maximum number of supported UEs in srsRAN?
Please, If you have the correlated information about the followed scenarios, explain with details:
1- Open5Gs CN + srsRAN DU/CU + USRP
2- Open5Gs CN + srsRAN Enterprise + USRP
3- Open5Gs CN + srsRAN Enterprise + RU (such as this guide)

Sincerely Thankfull.

[fllay]

The is a configuration in the configuration files to set the maximum number of UEs. For example

#   This file contains the PUCCH configuration for the gNB to support:
#   - SR period 20ms or 40ms.
#   - CSI period 20ms or 40ms.
#   - Max 128 UEs.

#   NOTEs:
#   - This configuration is optimized for TDD 7D-2U configuration, but it still works for TDD configurations
#     with more than 2 UL slots.
#   - This configuration might work for more than 128 UEs, although it hasn't been tested for those scenarios.

cell_cfg:
  pucch:
    sr_period_ms: 20   # This can be set either 20 or 40 ms.
    f1_nof_cell_res_sr: 50
    f2_nof_cell_res_csi: 50
  csi:
    csi_rs_period: 40  # This can be set either 20 or 40 ms.
  ul_common:
    max_ul_grants_per_slot: 64
    max_pucchs_per_slot: 63
  pusch:
    max_puschs_per_slot: 1
  tdd_ul_dl_cfg:
    nof_dl_symbols: 7
    nof_dl_slots: 7
    nof_ul_slots: 2

However, I think that the maximum number can be arbitrary set depend on the scheduler using in the RAN stack and 128, 64, 32 are just a parameter in the scheduler in srsRAN stack. As seen in the configuration file, there are so many parameters for these specific maximum number of UEs. Please correct me if I am wrong. I am still leaning 5g stack. Thank you

[Ali78k]

Thank you very much for the information, @fllay .

The primary focus of my question is on the practical support for UEs in real-world scenarios. We are in the process of deploying a 5G testbed tailored for Industrial IoT (IIoT) applications, and it's crucial for us to determine the most suitable configuration for our needs.

Could anyone provide insights into the practical, real-world capacity of UEs supported by each setup?
Understanding these specifics will significantly aid us in making an informed decision for our deployment.

Thanks.

[andrepuschmann]

Hey @Ali78k - what @fllay said above is exactly right. One needs to tailor and tune the cell configuration depending on the scenario. We believe that with the configuration examples we cover most use-cases - for the typical open-source user that's the case anyway. If you have requirements that go beyond that you're likely interested in commercial support that SRS offers to it's customers.

[Ali78k]

Hey @andrepuschmann - Thanks for the clarification.