[srslte-users] Attaching problems

[Aren Müller]

Hello,
I'm new to srsLTE. I'm trying to use a LimeSDR-USB as a base station but the COTS UE is sending like RACH spam. I searched on internet and found that this guy is having the same problem http://www.softwareradiosystems.com/pipermail/srslte-users/2019-August/002916.html . I found too an old message in the list ( <http://www.softwareradiosystems.com/pipermail/srslte-users/2017-September/001117.html> http://www.softwareradiosystems.com/pipermail/srslte-users/2017-November/001215.html ) and tried the solution changing the time_adv_samples parameters (which it's seems not to be defined for limesdr) and sometimes I got attach, but after a spam of minimal 10 RACH, and the connection was not stable.  Nevertheless, the values that I used were chosen manually because I didn't find the PRACH calibration function mentioned there. I used the values of 30, 15, 25, 65, 68 with 25 and 50 RB.

My question is: Am I in the good direction trying to change the time_adv_sample parameter or the problem lies everywhere else? If the answer is yes, where can I find this "prach calibration function"?. If the answer is no, where should I look to get a stable connection and not a RACH spam??

Thanks
Best regards,
Aren
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