MSG3 fails for band n66, 15kHz and 25 PRBs with OAI UE
Hello,
I've been trying to use the OAI gNB + OAI UE using the band n66 with 25 PRBs configuration file. Upon testing, several issues appear.
- The first one comes from the fact that the provided SSBref ARFCN does not correspond to any GSCN. This leads to an AssertFatal error. To fix that I changed the values of the ARFCN to the following :
- absoluteFrequencySSB = 430590
- dl_absoluteFrequencyPointA = 430126
- ul_absoluteFrequencyPointA = 350126
Doing that, it corrects the issue of the wrong GSCN.
-
But then a new issue appears about a wrong coreset. To correct it, I put the initialDLBWPcontrolResourceSetZero = 1. Then the gNB starts correctly.
-
Using OAI UE with the following command in sa mode :
sudo ./nr-uesoftmodem -r 25 --numerology 0 --band 66 -C 2152950000 --ssb 34 --rfsim --sa --rfsimulator.serveraddr 127.0.0.1 -O ../../../targets/PROJECTS/GENERIC-NR-5GC/CONF/ue.conf
The UE is stuck in the synchro detection phase. Please find attached a screenshot of the OAI UE logs
To conclude that issue, it must be said that the current conf files for band n66 don't work properly. Upon trying to correct it, a sync detection issue is raising.
There is something of but I cannot say where. Is it in the code or just the conf file ?
Thank you,
Best, Alexis Falempin