[srsran-users] 4G end-to-end network : [PHY] Synchronisation problem

[SCERBACOVA Ecaterina]

Hello !

I am trying to establish end-to-end 4G network.

The setup I'm using is :
2 PC + 2 bladeRF -> 1st PC - running the UE
                                 -> 2nd PC - running the ENB and EPC in separate consoles

I have encountered an issue with SFN synchronization running the UE. After the message that SFN is not yet synchronized I get the message about SNR and RSRP status.

I have tried to change different parameters in ue.conf file testing different tx and rx gains but without success. Also I put the same usim informations in user_db.csv file and I named the APN the same way in ue.conf and epc.conf file.
I have ip_forwarding activated on both computers and I switched cpu on performance mode. I've tried to use srate=11.52e6 in ue.conf file but it gets even worse.
Here are the pictures of my logs and ue.conf files.

Before using 2 bladeRFs, I managed to connect to 4G network using a cellphone Pixel 6 with a programmable sim as UE, so the problem is probably in my UE.conf file.

Thank you for your help !

Ecaterina





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