On 21.03.2024 17:04, hellowangf...@gmail.com wrote:
I used osmocom-bb and grgsm with usrp b210 to connect  openBTS, but failed. The command is  "./mobile -c 
/home/oi/wf/osmocom-bb/doc/examples/mobile/default.cfg","./trxcon -p 5075 " ,"grgsm_trx 
-p 5075" .
When i used “./cell_log -A 1 ”, it could find plmn 1-1 with arfcn 1 which is 
same with openBTS.

FYI, grgsm_trx does not implement any kind of power measurement. The reported RSSI values are just random values between -120 and -100. Because of that, cell_log may or may not detect cells.

But when test with sim testcard 1, it failed to find the 1-1 cell. Could anyone 
give any suggestion about this? Thanks a lot!

It's a good question why cell_log does find your cell, but mobile does not. As a workaround, I would recommend using the 'stick' parameter in mobile.cfg. Just add it like this:

ms 1
 stick 1
 ...

This will force the mobile app to use ARFCN 1 and nothing else. This is exactly what I am doing when running a virtual setup, for instance.

--
Best regards,
Vadim.

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