[srslte-users] ZeroMQ failure to connect.

Wed May 6 15:51:37 UTC 2020

Hi Kevin,

I also encountered issues with RAR on my MacBook Pro in VMWare, so the UE connected only after 3-4 attempts, on the server PC in Hyper-V it runs smoothly.

However, I am not sure that the cause of the issues is the same, because looks like you have plenty of computational resources.

Attached you find archived content of ~/.config/srslte folder. Apart from configuration files I didn’t change anything.

The run commands from the srsLTE build folder with those configs are:
sudo ip netns add ue1

# in terminal 0
sudo ./srsepc/src/srsepc

# in terminal 1
sudo ./srsenb/src/srsenb

# in terminal 2
sudo ./srsue/src/srsue

------
Igor Kim (M.Eng)
Wissenschaftlicher Mitarbeiter
Fakultät Digitale Transformation
Hochschule für Technik, Wirtschaft und Kultur Leipzig

Zschochersche straße 69, 04229 Leipzig
+49 341 3062-555 (Tel.)
E-mail: igor.kim at htwk-leipzig.de
On 6. May 2020, 17:14 +0200, Kevin Heathley <kevin.heathley at gmail.com>, wrote:
> 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 --------->
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