[srslte-users] ZeroMQ failure to connect.

Wed May 6 15:13:58 UTC 2020

Hi Igor, I am unable to get this working in AWS and GCP. Running Ubuntu
18.04 on 8 vCPU and 32 GB RAM. I must be doing something wrong. Have not
tried VMware yet.

After compiling, did you install default config files in /etc or did you
create your own? I installed through "srslte_install_configs.sh service".

Looking at the UE side, it seems to end up in an endless loop as there is
no RAR being sent from eNB.

ubuntu at ip-172-31-22-211:~/srsLTE/build$ sudo ./srsue/src/srsue
--rf.device_name=zmq
--rf.device_args="tx_port=tcp://*:2001,rx_port=tcp://localhost:2000,id=ue,base_srate=23.04e6"
--gw.netns=ue1 --phy.nof_phy_threads=1
Reading configuration file /etc/srslte/ue.conf...

Built in Release mode using commit e3e384821 on branch master.

Opening 1 channels in RF device=zmq with
args=tx_port=tcp://*:2001,rx_port=tcp://localhost:2000,id=ue,base_srate=23.04e6
CHx base_srate=23.04e6
CHx id=ue
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12
decimation)
CH0 rx_port=tcp://localhost:2000
CH0 tx_port=tcp://*:2001
Waiting PHY to initialize ... done!
Attaching UE...
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12
decimation)
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12
decimation)
.
Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=-0.2 KHz
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2
decimation)
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2
decimation)
Found PLMN:  Id=00101, TAC=7
Random Access Transmission: seq=36, ra-rnti=0x2
Random Access Complete.     c-rnti=0x46, ta=0
RRC Connected
Scheduling request failed: releasing RRC connection...
Random Access Transmission: seq=6, ra-rnti=0x2
Random Access Transmission: seq=27, ra-rnti=0x2
Random Access Transmission: seq=2, ra-rnti=0x2
Random Access Transmission: seq=26, ra-rnti=0x2
Random Access Transmission: seq=37, ra-rnti=0x2
Random Access Transmission: seq=10, ra-rnti=0x2
Random Access Transmission: seq=24, ra-rnti=0x2
Random Access Transmission: seq=19, ra-rnti=0x2
Random Access Transmission: seq=46, ra-rnti=0x2
Random Access Transmission: seq=26, ra-rnti=0x2
Warning: Detected Radio-Link Failure
RRC IDLE
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12
decimation)
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12
decimation)
.
Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=-0.2 KHz
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2
decimation)
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2
decimation)
Found PLMN:  Id=00101, TAC=7
Random Access Transmission: seq=1, ra-rnti=0x2
Random Access Complete.     c-rnti=0x51, ta=0
RRC Connected
Scheduling request failed: releasing RRC connection...
Random Access Transmission: seq=34, ra-rnti=0x2
Random Access Transmission: seq=28, ra-rnti=0x2
Random Access Transmission: seq=35, ra-rnti=0x2
Random Access Transmission: seq=29, ra-rnti=0x2
Random Access Transmission: seq=31, ra-rnti=0x2
Random Access Transmission: seq=16, ra-rnti=0x2
Random Access Transmission: seq=3, ra-rnti=0x2
< --------- the above pattern repeats over and over (RRC Connect / Idle)
---------->

On the eNB it looks like this:

ubuntu at ip-172-31-22-211:~/srsLTE/build$ sudo ./srsenb/src/srsenb
--rf.device_name=zmq
--rf.device_args="fail_on_disconnect=true,tx_port=tcp://*:2000,rx_port=tcp://localhost:2001,id=enb,base_srate=23.04e6"
--expert.nof_phy_threads=1
---  Software Radio Systems LTE eNodeB  ---

Reading configuration file /etc/srslte/enb.conf...

Built in Release mode using commit e3e384821 on branch master.

Opening 1 channels in RF device=zmq with
args=fail_on_disconnect=true,tx_port=tcp://*:2000,rx_port=tcp://localhost:2001,id=enb,base_srate=23.04e6
CHx base_srate=23.04e6
CHx id=enb
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12
decimation)
CH0 rx_port=tcp://localhost:2001
CH0 tx_port=tcp://*:2000
CH0 fail_on_disconnect=true
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2
decimation)
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2
decimation)
Setting frequency: DL=2685.0 Mhz, UL=2565.0 MHz for cc_idx=0

==== eNodeB started ===
Type <t> to view trace
RACH:  tti=3561, preamble=36, offset=0, temp_crnti=0x46
Disconnecting rnti=0x46.
RACH:  tti=6461, preamble=6, offset=0, temp_crnti=0x47
Disconnecting rnti=0x47.
RACH:  tti=6551, preamble=27, offset=0, temp_crnti=0x48
Disconnecting rnti=0x48.
RACH:  tti=6641, preamble=2, offset=0, temp_crnti=0x49
RACH:  tti=6661, preamble=26, offset=0, temp_crnti=0x4a
SCHED: Could not transmit RAR within the window (RA TTI=6641, Window=10,
Now=6672)
Disconnecting rnti=0x49.
Disconnecting rnti=0x4a.
RACH:  tti=6751, preamble=37, offset=0, temp_crnti=0x4b
Disconnecting rnti=0x4b.
RACH:  tti=6841, preamble=10, offset=0, temp_crnti=0x4c
Disconnecting rnti=0x4c.
RACH:  tti=6931, preamble=24, offset=0, temp_crnti=0x4d
Disconnecting rnti=0x4d.
RACH:  tti=7021, preamble=19, offset=0, temp_crnti=0x4e
<---------- the above repeats over and over --------->

On Wed, May 6, 2020 at 4:24 AM Igor Kim <igor.kim at htwk-leipzig.de> wrote:

> Hi all,
>
> I’ve successfully built and run srsLTE ZMQ on Ubuntu 18.04 in a virtual
> machine with VMWare Fusion and Hyper-V.
>
> Although I did encounter problems while running make and starting enb/ue
> with zmq frontend in VMs. When starting enb/ue, they were randomly crashing
> with “Killed” message with no further logs (debug level).
>
> Turned out the build issue was due to insufficient CPUs on the VM, and the
> enb/ue run issue due to insufficient RAM. Once I increased resources (4
> core/8 Gb RAM), it built and run ping example fine.
>
> For info, please find attached build commands I used.
>
> Hope it helps.
>
> Regards,
> Igor
>
>
> ------
> Igor Kim (M.Eng)
> Wissenschaftlicher Mitarbeiter
> Fakultät Digitale Transformation
> Hochschule für Technik, Wirtschaft und Kultur Leipzig
>
> Zschochersche straße 69, 04229 Leipzig
> E-mail: igor.kim at htwk-leipzig.de
> On 6. May 2020, 09:32 +0200, Andre Puschmann <
> andre.puschmann at softwareradiosystems.com>, wrote:
>
> Ray, Kevin,
>
>
> On 6/5/20 2:52, Kevin Heathley wrote:
>
> Ray, I also had the same issue. I was unable to get ZMQ to work at all
>
> with Ubuntu 18.04 when I compiled last week. Debian 9 and Debian 10, as
>
> well as Ubuntu 16.04 worked partially as "make test" completed
>
> successfully, which it didn't with Ubuntu 18.04.
>
>
> thanks for reporting the ZMQ issue. We'll be looking into it and try to
>
> replicate on our side.
>
>
> What's the build/test issue on Ubuntu 18.04 you're seeing?
>
>
> Thanks
>
> Andre
>
>
> _______________________________________________
>
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>
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>
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>
>
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