Radio link failure error when download large data using multiple UEs

Q/A
#1

Hello,

I would like to ask about the error which happened when I connected multiple UEs and downloaded large data.
I’m using Free5GC ver.3.0.5 and UERANSIM ver3.1.9.

I downloaded the Ubuntu iso files on 3 UEs at the same time.

./nr-binder 60.60.0.3 wget https://old-releases.ubuntu.com/releases/focal/ubuntu-20.04-desktop-amd64.iso

Then, some of the UEs gave the following error and disconnected to internet.

[2021-07-02 15:07:06.896] [nas] [error] Radio link failure detected

I couldn’t find out the cause and the way to solve these problems.
I would like to keep multiple UEs running stably at the same time.
I would appreciate it if you could tell me:
・Has anyone faced same situation which happened when you downloaded large data with multiple UEs?
・Does anyone know any ways to solve this problem?

I will attach some configuration files and error logs.

Thank you for your help.

smfcfg.ulcl.intranet2.yaml (7.0 KB)
uerouting.yaml (3.1 KB)
upf1cfg.ulcl.yaml (933 Bytes)
upf2cfg.ulcl.intranet.yaml (931 Bytes)
upfbcfg.ulcl.intranet.yaml (931 Bytes)
error-ue_log.txt (3.3 KB)
free5gc-ue.yaml (1.4 KB)
free5gc-gnb.yaml (819 Bytes)
ran_log.txt (1.7 KB)

#2

Hi NK636,

It seems to have some bugs in UERANSIM and you may report it to github issue of UERANSIM.

Thanks.

#3

Hi @Jordan,

Thank you for your response.
I understand that this problem may be caused by UERANSIM.
I will try reporting it to UERANSIM issues.

I appreciate your help.

#4