[srslte-users] Connection enB UE

Arthur Aner aner at rhrk.uni-kl.de
Wed Apr 18 09:29:10 UTC 2018


Hi,

I'm currently using 2x USRP B210 to connect the srsenb 
with the srsue.
I either get no attachement and always this messages on 
enb console:

Disconnecting rnti=0x8a.
RACH:  tti=2931, preamble=1, offset=20, temp_crnti=0x8d
RACH:  tti=2961, preamble=2, offset=20, temp_crnti=0x8e
Disconnecting rnti=0x8b.

and following on ue:
Random Access Transmission: seq=1, ra-rnti=0x2
LRandom Access Transmission: seq=2, ra-rnti=0x2
Random Access Transmission: seq=3, ra-rnti=0x2
Random Access Transmission: seq=4, ra-rnti=0x2
Random Access Transmission: seq=5, ra-rnti=0x2
Random Access Transmission: seq=6, ra-rnti=0x2
LRandom Access Transmission: seq=7, ra-rnti=0x2
LLLRandom Access Transmission: seq=8, ra-rnti=0x2
Random Access Transmission: seq=9, ra-rnti=0x2
Random Access Transmission: seq=10, ra-rnti=0x2
Warning: Detected Radio-Link Failure

I've read the advices here 
http://www.softwareradiosystems.com/pipermail/srslte-users/2018-March/001441.html
and looked if my SNR is ok and it was ~20dB.

Sometimes the ue can attach but it's not for long and I 
get the Message:

Scheduling Request failed: releasing RRC Connection


I didn't make any changes in the conf files except of 
turning on gui and the gains.

Is there anything else I can take a look at or can I 
should I attach any logging files which could help solve 
my problem.

Kind Regards
Arthur Aner



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