[srslte-users] Please help with srsENB DL problems!

[Ilshat Shaidullin]

Hello!

I have a question about 2 DL problems in srsENB. I use the following
configuration:
- USRP B210
- 25 PRB bandwidth
- Max DL MCS Limit 16.

When phone is within about 1-2 meters from USRP, everything works great. UE
reaches 6.7 Mbps in DL and 4-5 Mbps in UL. But, if UE is further than 2
meters from USRP, DL speed is very low (0.1-0.3 Mbps) although signal
strength is good (-77 dBm) and UL speed is high (4 Mbps). And if UE is
about 6-7 meters from USRP it can't stay attached for a long period. It
disconnects and attaches to commercial eNB,

Also there is a problem, when UE tries to attach and the distance between
UE and USRP is about 6-7 meters. Signal strength is about -80 dBm and is
the best among other commercial eNB.  Phone performs many RA procedures,
but they fail. But phone can easily attach to commercial eNB with signal
strength -86 dBM and which is situated quite far from our office.

I have a feeling that the same thing causes these two troubles.

Please, help me to figure out what is wrong.

Best,
Ilshat
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