[srslte-users] Getting srsUE up and running

[Tomcsányi, Domonkos]

Hi all, 

I'm sorry if this has been asked before on the list, but I couldn't find any info about this using Google, so I'm turning to you: 
I'm trying to connect srsUE to an LTE test network consisting of a commercial eNB and MME. All my phones can see the network, connect to it etc. but with srsUE I see the following: 

root at LTE:~/srs/srsUE/build/ue/src# ./ue ue.conf 
linux; GNU C++ version 4.8.4; Boost_105400; UHD_003.009.003-release 

--- Software Radio Systems LTE UE --- 

Reading configuration file ue.conf... 
Using srsLTE version 001.002.000 
Opening USRP with args: type=b200,recv_frame_size=9232,send_frame_size=9232 
-- Detected Device: B200 
-- Operating over USB 3. 
-- Detecting internal GPSDO.... Found an internal GPSDO 
-- Initialize CODEC control... 
-- Initialize Radio control... 
-- Performing register loopback test... pass 
-- Performing CODEC loopback test... pass 
-- Asking for clock rate 16.000000 MHz... 
-- Actually got clock rate 16.000000 MHz. 
-- Performing timer loopback test... pass 
-- Setting master clock rate selection to 'automatic'. 
-- Asking for clock rate 32.000000 MHz... 
-- Actually got clock rate 32.000000 MHz. 
-- Performing timer loopback test... pass 
Setting frequency: DL=2685.0 Mhz, UL=2565.0 MHz 
Searching for cell... 
Found CELL ID: 1 CP: Normal , CFO: 1.8 KHz. 
Trying to decode MIB... 
- Cell ID: 1 
- Nof ports: 2 
- CP: Normal 
- PRB: 100 
- PHICH Length: Normal 
- PHICH Resources: 1/6 
- SFN: 0 
MIB received BW=20 MHz 
Initializating cell configuration... 
Setting Sampling frequency 23.04 MHz 
No space for SSS/CP detection. Realigning frame... 
No space for SSS/CP detection. Realigning frame... 
No space for SSS/CP detection. Realigning frame... 
Timeout while synchronizing SFN 
No space for SSS/CP detection. Realigning frame... 
No space for SSS/CP detection. Realigning frame... 
Timeout while synchronizing SFN 
No space for SSS/CP detection. Realigning frame... 
No space for SSS/CP detection. Realigning frame... 
Timeout while synchronizing SFN 
No space for SSS/CP detection. Realigning frame... 
Timeout while synchronizing SFN 
No space for SSS/CP detection. Realigning frame... 
No space for SSS/CP detection. Realigning frame... 
No space for SSS/CP detection. Realigning frame... 
Timeout while synchronizing SFN 
Timeout while synchronizing SFN 
No space for SSS/CP detection. Realigning frame... 
No space for SSS/CP detection. Realigning frame... 

I'm using an USRP B200 with GPSDO (so not the MIMO capable B210 version) as you can see. I'm pretty sure my ue.conf is in tact, basically just modified the frequency and the USIM parts of it. I tried to mess around with the gain settings since the whole setup is on my table, so not much gain is needed in my opinion, but that didn't change much. It is weird though that MIB decoding gives different results each time I start srsUE. The attached log you can see shows 20 MHz of BW, but it also detects 10 MHz regularly. 
Also sometimes it just says "Error receiveing from UHD: 30" and then I need to unplug and plug in the USRP to get it working again. 

I hope you can shed some on this for a newbie like me. 

Cheers, 
Domi 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.srsran.com/pipermail/srsran-users/attachments/20160727/e9cb70cd/attachment.htm>