[srslte-users] srsUE Not Connecting

[Francisco Paisana]

Hey Ayman,

You seem to be having a lot of Lates (see "RF status: O=1, U=1, L=42"). Is
your computer powerful enough? If so, check if the scaling governor is set
to performance mode, by running:

> cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor


If it is not, run:

> echo performance | sudo tee
> /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor


Kind Regards,
Francisco


On Fri, Jun 5, 2020 at 8:28 AM Ayman Maghrabi <ayman.maghrabi at gmail.com>
wrote:

> Dear srsLTE community,
>
> I've had this issue today with srsUE as it's not connecting to the eNodeB.
> I was able to connect it before on the same setup, but I tried to do some
> modifications and now I re-installed the original code but was not able to
> connect.
>
> My setup include two PCs with URSP b210 on both machines, both machines
> are close to each other and the setup worked before.
>
> One thing I want to mention is that when I tried to run srsenb initially,
> I got a parser error message that some configuration were missing. I
> checked the and rr.conf file and found that these parameters (cell_id, tac,
> pci, root_seq_idx, dl_earfcn, ul_earfcn, ho_active)  were commented out. I
> removed the comment and was able to run srsenb now.
>
> When running srsUE on the other machine, I get the following:
>
> Built in Release mode using commit c892ae56b on branch master.
>
> Opening 1 channels in RF device=default with args=default
> [INFO] [UHD] linux; GNU C++ version 7.4.0; Boost_106501;
> UHD_3.14.1.1-release
> [INFO] [LOGGING] Fastpath logging disabled at runtime.
> Opening USRP channels=1, args: type=b200,master_clock_rate=23.04e6
> [INFO] [B200] Detected Device: B210
> [INFO] [B200] Operating over USB 3.
> [INFO] [B200] Initialize CODEC control...
> [INFO] [B200] Initialize Radio control...
> [INFO] [B200] Performing register loopback test...
> [INFO] [B200] Register loopback test passed
> [INFO] [B200] Performing register loopback test...
> [INFO] [B200] Register loopback test passed
> [INFO] [B200] Asking for clock rate 23.040000 MHz...
> [INFO] [B200] Actually got clock rate 23.040000 MHz.
> Waiting PHY to initialize ... done!
> Attaching UE...
> .
> Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=1.4 KHz
> Found PLMN:  Id=00101, TAC=1
> Random Access Transmission: seq=48, ra-rnti=0x2
> Random Access Transmission: seq=15, ra-rnti=0x2
> Random Access Transmission: seq=4, ra-rnti=0x2
> Random Access Transmission: seq=21, ra-rnti=0x2
> Random Access Transmission: seq=17, ra-rnti=0x2
> Random Access Transmission: seq=14, ra-rnti=0x2
> Random Access Transmission: seq=14, ra-rnti=0x2
> Random Access Transmission: seq=9, ra-rnti=0x2
> Random Access Transmission: seq=6, ra-rnti=0x2
> Random Access Transmission: seq=20, ra-rnti=0x2
> Warning: Detected Radio-Link Failure
> .RF status: O=1, U=2, L=42
>
> Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=1.5 KHz
> Found PLMN:  Id=00101, TAC=1
> Random Access Transmission: seq=44, ra-rnti=0x2
> Random Access Transmission: seq=17, ra-rnti=0x2
> Random Access Transmission: seq=10, ra-rnti=0x2
> Random Access Transmission: seq=15, ra-rnti=0x2
> Random Access Transmission: seq=23, ra-rnti=0x2
> Random Access Transmission: seq=26, ra-rnti=0x2
> Random Access Transmission: seq=17, ra-rnti=0x2
> Random Access Transmission: seq=24, ra-rnti=0x2
> Random Access Transmission: seq=31, ra-rnti=0x2
> Random Access Transmission: seq=14, ra-rnti=0x2
> Warning: Detected Radio-Link Failure
> RF status: O=2, U=2, L=85
> .
> Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=1.3 KHz
> Found PLMN:  Id=00101, TAC=1
> Random Access Transmission: seq=20, ra-rnti=0x2
> Random Access Transmission: seq=23, ra-rnti=0x2
> Random Access Transmission: seq=33, ra-rnti=0x2
> Random Access Transmission: seq=24, ra-rnti=0x2
> Random Access Transmission: seq=20, ra-rnti=0x2
> Random Access Transmission: seq=50, ra-rnti=0x2
> Random Access Transmission: seq=14, ra-rnti=0x2
> Random Access Transmission: seq=34, ra-rnti=0x2
> Random Access Transmission: seq=35, ra-rnti=0x2
> Random Access Transmission: seq=49, ra-rnti=0x2
> Warning: Detected Radio-Link Failure
> RF status: O=1, U=1, L=42
> RF status: O=1, U=1, L=42
> RF status: O=0, U=1, L=0
>
> It keeps repeating and trying to connect without being able to.
>
> I appreciate your help.
>
> Regards,
> Ayman Magrabi
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> srslte-users at lists.softwareradiosystems.com
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