Hi @chris5g, I tried also to configure Band n78 for the NR cell as my Samsung S20 worked with 5G NSA network. However, for 5G SA network, I faced the same issue as yours. I'm wondering whether you've figured out the solution? Or we really need to buy a new phone in the list of tested phones. Thanks.

Hi,
unfortunately not. I found some note in the srsRAN docu:
"Currently, srsRAN only supports the use of FDD bands for 5G SA." Since n78 is TDD I fear that n78 is currently not supported. any confirmation would be appriciated.

btw. I have a Samsung S21 and SA is not working for me currently. ( I guess firmware update is needed). however at least the 5G signal can be seen.

hope that helps,
br,
chris

Thanks @chris5g . How did you check this "at least the 5G signal can be seen"?

I searched for network operators manually in the mobile network menu of the phone and I could saw the MCC,NDC from the 5GSA.

Just to let know and not confuse u. The Samsung S21 was used with another radio not with srsRAN when I mentioned to see the 5g SA signal.

i also have this issue even by FDD , for example in my case band is N28 :

@iman432: With this setting gnB is starting:
dl_arfcn = 156000;
band = 28;
coreset0_idx = 6;

@chris5g How did you know the correct value of dl_arfcn? Is there any official document about this parameter for each band? Also, I've tried to modify the value of coreset0_idx for band 78, but had no luck.

@iman432: With this setting gnB is starting: dl_arfcn = 156000; band = 28; coreset0_idx = 6;

Thank you, my version is 22.04 and i think its solved in 22.04.1 as below :

Change Log for Releases

22.04.1

• Various bug fixes in RLC AM and PDCP for NR
• Fix crash when UE attempted to reestablish in SA
• Remove fixed coreset0 index for SSB === should be related to this
• Add support for SIB5 and SIB6 transmission in LTE

@iman4332: Yes I using v22.04.01.

@strongcourage: there a several sites available. e.g. https://www.sqimway.com/nr_band.php/

Seems bands after N71, have issue with coreset.

N78 :

N77 :

N74 :

Currently for 5G-SA, TDD bands with 30kHz SCS (e.g. n78, n77) are not supported.

Hello i have the same issue using 5G NSA can someone help me please

nr_cell_list =
(
{
rf_port = 1;
cell_id = 0x02;
tac = 0x0007;
pci = 500;
root_seq_idx = 204;

// TDD:
//dl_arfcn = 634240;
//band = 78;

// FDD:
dl_arfcn = 368500;
band = 3;
coreset0_idx = 6

}
);