[srslte-users] OAI UE not connecting to OAI enb (missed real time error)

[Andre Puschmann]

Hey Samie,

better ask OAI related issues on the OAI list.

Cheers
Andre


On 26/5/20 13:55, Samie Mostafavi wrote:
> Hi,
> 
> I am trying to connect my customized ADRV board using OAI ue to USRP
> B210 OAI enb. When I run UE in --test-phy mode, I get the "Missed real
> time" error:
> 
> sudo ./cmake_targets/lte_build_oai/build/lte-uesoftmodem -U 1 -C
> 2680012000 -r 25 --ue-rxgain 125 --ue-txgain 125 --ue-max-power 0
> --ue-scan-carrier --phy-test --nokrnmod 1 --noS1 2>&1 | tee UE.log
> ...
> ...
> [PHY]   [UE 0] Frame 248 RRC Measurements => rssi -85.0 dBm (dig 40.0
> dB, gain 125), N0 -152 dBm,  rsrp -109.8 dBm/RE, rsrq 9.0 dB
> [PHY]   [UE 0] Frame 248 MIB Information => FDD, NORMAL, NidCell 0,
> N_RB_DL 25, PHICH DURATION 0, PHICH RESOURCE 1/6, TX_ANT 1
> [PHY]   [UE 0] Frame 248 Measured Carrier Frequency 2680015614 Hz
> (offset -4 Hz)
> [HW]   Got synch: hw_slot_offset 3, carrier off 0 Hz, rxgain 125 (DL
> 2680015610, UL 2560015610), UE_scan_carrier 0
> Setting adrv TX Freq 2560015610.000000, RX Freq 2680015610.000000
> [PHY]   Initializing frame parms for N_RB_DL 25, Ncp 0, osf 1
> [PHY]   lte_parms.c: Setting N_RB_DL to 25, ofdm_symbol_size 512
> [PHY]   Resynchronizing RX by 15064 samples (mode = 0)
> [PHY]   Missed real time
> 
> I searched but I couldnt figure how this issure can be resolved. Is it
> due to CPU performance? I have installed low-latency kernel. I would
> appreciate if anyone can help.
> The UE log is attached. (enb gets nothing)
> 
> Best,
> Samie
> 
> 
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