Is it possible to run UERANSIM on arm32v7？

[leegdut]

Hi.
UERANSIM is awesome!!!
I have successfully run open5gs and UERANSIM on ubuntu.

And I want to run UERANSIM on my device(arm32v7, 32bit).
So I want to know it's possible to make UERANSIM for arm32v7?

I have modify the CMakeLists.txt to specify the compiler, but there are many errors.
Is there any guidance or reference?
Please let me know. Thank you so much.

Best regards

[aligungr]

Hi, UERANSIM supports only 64-bit architectures for now. You can use ARM, AMD or any other 64-bit arc.

[leegdut]

Thanks for your reply. And I will try to migrate UERANSIM to armv7-32bit.

[leegdut]

👍 ! The above error has been solved.
And the first error is :

make[3]: Entering directory '/usr/lwj/resource/new_cross/UERANSIM/cmake-build-release'
[ 93%] Building CXX object CMakeFiles/nr-cli.dir/src/cli.cpp.o
[ 93%] Linking CXX executable nr-cli
/usr/lib/gcc-cross/arm-linux-gnueabi/9/../../../../arm-linux-gnueabi/bin/ld: cannot find -lsctp
collect2: error: ld returned 1 exit status
make[3]: *** [CMakeFiles/nr-cli.dir/build.make:103: nr-cli] Error 1
make[3]: Leaving directory '/usr/lwj/resource/new_cross/UERANSIM/cmake-build-release'
make[2]: *** [CMakeFiles/Makefile2:237: CMakeFiles/nr-cli.dir/all] Error 2
make[2]: Leaving directory '/usr/lwj/resource/new_cross/UERANSIM/cmake-build-release'
make[1]: *** [Makefile:91: all] Error 2
make[1]: Leaving directory '/usr/lwj/resource/new_cross/UERANSIM/cmake-build-release'
make: *** [makefile:12: build] Error 2

I think it can't find the 32-bit sctp library, so I fix the proble as follow, but i don't know if it is correct or not.

tar -xzxf lksctp-tools-1.0.11.tar.gz
./configure --prefix=$prefix --host=arm CC=arm-linux-gnueabi-gcc
make

then modify the CMakeLists.txt:
LINK_DIRECTORIES(/usr/lwj/resource/sctp/lksctp-tools-1.0.11/src/lib/.libs)

And the next error is：
make[3]: Entering directory '/usr/lwj/resource/new_cross/UERANSIM/cmake-build-release'
[ 93%] Linking CXX executable nr-cli
/usr/lib/gcc-cross/arm-linux-gnueabi/9/../../../../arm-linux-gnueabi/bin/ld: src/utils/libutils.a(random.cpp.o): in function Random::Random()': random.cpp:(.text+0x40): undefined reference to __atomic_fetch_add_8'
collect2: error: ld returned 1 exit status
make[3]: *** [CMakeFiles/nr-cli.dir/build.make:103: nr-cli] Error 1
make[3]: Leaving directory '/usr/lwj/resource/new_cross/UERANSIM/cmake-build-release'
make[2]: *** [CMakeFiles/Makefile2:237: CMakeFiles/nr-cli.dir/all] Error 2
make[2]: Leaving directory '/usr/lwj/resource/new_cross/UERANSIM/cmake-build-release'
make[1]: *** [Makefile:91: all] Error 2
make[1]: Leaving directory '/usr/lwj/resource/new_cross/UERANSIM/cmake-build-release'
make: *** [makefile:12: build] Error 2

[aligungr]

See the link:
redis/redis#6275

-latomic flag may fix the problem.

[leegdut]

Unfortunately, the problem was not resolved after I added -latomic flag. I added -latomic flag to CMakeLists.txt like this:

Maybe you can repeat the error by installing the cross-compilation chain. Thanks！

[DiogoCruz40]

Hey @leegdut,
Did you manage to resolve this problem? I used the same flag as you and am experiencing the same problem.

[DiogoCruz40]

By installing Ubuntu Server 22.04 LTS (32 bits) on the Rapsberry PI and following the installation instructions in the UERANSIM official repo, I was able to resolve the issue.

[leegdut]

Hi,I just run UERANSIM on my arm32 device and it's very close to being able to connect with open5gs.
But there is still an error as follows：

/storage/ue # ./nr-gnb -c new_open5gs-gnb.yaml &
[1]- Done ./nr-gnb -c new_open5gs-gnb.yaml
/storage/ue # UERANSIM v3.2.4
[2000-08-21 20:14:31.022] [sctp] [info] Trying to establish SCTP connection... (
70.32.36.53:38412)
[2000-08-21 20:14:31.043] [sctp] [info] SCTP connection established (70.32.36.53
:38412)
[2000-08-21 20:14:31.043] [sctp] [debug] SCTP association setup ascId[4]
[2000-08-21 20:14:31.044] [ngap] [debug] Sending NG Setup Request
[2000-08-21 20:14:31.046] [ngap] [debug] NG Setup Response received
[2000-08-21 20:14:31.046] [ngap] [info] NG Setup procedure is successful

/storage/ue # ./nr-ue -c new_open5gs-ue.yaml &
/storage/ue # UERANSIM v3.2.4
[2000-08-21 20:14:53.718] [nas] [info] UE switches to state [MM-DEREGISTERED/PLM
N-SEARCH]
[2000-08-21 20:14:53.720] [rrc] [debug] UE[1] new signal detected
[2000-08-21 20:14:53.720] [rrc] [debug] New signal detected for cell[1], total [
1] cells in coverage
[2000-08-21 20:14:53.721] [nas] [info] Selected plmn[001/01]
[2000-08-21 20:14:53.721] [rrc] [info] Selected cell plmn[001/01] tac[1] categor
y[SUITABLE]
[2000-08-21 20:14:53.722] [nas] [info] UE switches to state [MM-DEREGISTERED/PS]
[2000-08-21 20:14:53.722] [nas] [info] UE switches to state [MM-DEREGISTERED/NOR
MAL-SERVICE]
[2000-08-21 20:14:53.722] [nas] [debug] Initial registration required due to [MM
-DEREG-NORMAL-SERVICE]
[2000-08-21 20:14:53.722] [nas] [debug] UAC access attempt is allowed for identi
ty[0], category[MO_sig]
[2000-08-21 20:14:53.722] [nas] [debug] Sending Initial Registration
[2000-08-21 20:14:53.722] [nas] [info] UE switches to state [MM-REGISTER-INITIAT
ED]
[2000-08-21 20:14:53.722] [rrc] [debug] Sending RRC Setup Request
[2000-08-21 20:14:53.723] [rrc] [info] RRC Setup for UE[1]
[2000-08-21 20:14:53.724] [rrc] [info] RRC connection established
[2000-08-21 20:14:53.724] [rrc] [info] UE switches to state [RRC-CONNECTED]
[2000-08-21 20:14:53.724] [ngap] [debug] Initial NAS message received from UE[1]
[2000-08-21 20:14:53.725] [nas] [info] UE switches to state [CM-CONNECTED]
[2000-08-21 20:14:53.744] [nas] [debug] Authentication Request received
[2000-08-21 20:14:53.745] [ngap] [error] NGAP APER encoding failed

/storage/ue #
/storage/ue # [2000-08-21 20:14:59.748] [nas] [debug] Authentication Request rec
eived
[2000-08-21 20:14:59.748] [nas] [error] Sending Authentication Failure with caus
e [NGKSI_ALREADY_IN_USE]
[2000-08-21 20:14:59.749] [ngap] [error] NGAP APER encoding failed

/storage/ue # [2000-08-21 20:15:05.754] [nas] [debug] Authentication Request rec
eived
[2000-08-21 20:15:05.754] [nas] [error] Sending Authentication Failure with caus
e [NGKSI_ALREADY_IN_USE]
[2000-08-21 20:15:05.755] [ngap] [error] NGAP APER encoding failed
[2000-08-21 20:15:08.857] [nas] [debug] NAS timer[3510] expired [1]
[2000-08-21 20:15:08.857] [nas] [info] UE switches to state [MM-DEREGISTERED/PS]
[2000-08-21 20:15:08.857] [nas] [info] UE switches to state [5U2-NOT-UPDATED]
[2000-08-21 20:15:08.857] [nas] [info] Performing local release of NAS connectio
n
[2000-08-21 20:15:08.858] [nas] [info] UE switches to state [MM-DEREGISTERED/ATT
EMPTING-REGISTRATION]
[2000-08-21 20:15:08.858] [rrc] [info] UE switches to state [RRC-IDLE]
[2000-08-21 20:15:08.858] [nas] [info] UE switches to state [CM-IDLE]
[2000-08-21 20:15:09.743] [rrc] [debug] UE[2] new signal detected
[2000-08-21 20:15:11.202] [rls] [debug] UE[1] signal lost

and the open5gs shows:
root@VOLT2:/usr/lwj/open5gs/open5gs# 01/20 12:14:07.176: [amf] INFO: InitialUEMessage (../src/amf/ngap-handler.c:361)
01/20 12:14:07.178: [amf] INFO: [Added] Number of gNB-UEs is now 1 (../src/amf/context.c:2036)
01/20 12:14:07.180: [amf] INFO: RAN_UE_NGAP_ID[3] AMF_UE_NGAP_ID[3] TAC[1] CellID[0x10] (../src/amf/ngap-handler.c:497)
01/20 12:14:07.182: [amf] INFO: [suci-0-001-01-0000-0-0-0000000001] Unknown UE by SUCI (../src/amf/context.c:1388)
01/20 12:14:07.183: [amf] INFO: [Added] Number of AMF-UEs is now 1 (../src/amf/context.c:1187)
01/20 12:14:07.183: [gmm] INFO: Registration request (../src/amf/gmm-sm.c:134)
01/20 12:14:07.183: [gmm] INFO: [suci-0-001-01-0000-0-0-0000000001] SUCI (../src/amf/gmm-handler.c:156)
01/20 12:14:32.407: [amf] INFO: InitialUEMessage (../src/amf/ngap-handler.c:361)
01/20 12:14:32.407: [amf] INFO: [Added] Number of gNB-UEs is now 2 (../src/amf/context.c:2036)
01/20 12:14:32.407: [amf] INFO: RAN_UE_NGAP_ID[4] AMF_UE_NGAP_ID[4] TAC[1] CellID[0x10] (../src/amf/ngap-handler.c:497)
01/20 12:14:32.407: [amf] INFO: [suci-0-001-01-0000-0-0-0000000001] known UE by SUCI (../src/amf/context.c:1386)
01/20 12:14:32.407: [gmm] WARNING: Registration request (../src/amf/gmm-sm.c:573)
01/20 12:14:32.407: [gmm] INFO: [suci-0-001-01-0000-0-0-0000000001] SUCI (../src/amf/gmm-handler.c:156)
01/20 12:14:32.407: [amf] WARNING: GUTI has already been allocated (../src/amf/context.c:1049)
01/20 12:15:02.415: [amf] WARNING: Implicit NG release (../src/amf/amf-sm.c:713)
01/20 12:15:02.415: [amf] WARNING: RAN_UE_NGAP_ID[3] AMF_UE_NGAP_ID[3] (../src/amf/amf-sm.c:714)
01/20 12:15:02.415: [amf] INFO: UE Context Release [Action:1] (../src/amf/ngap-handler.c:1398)
01/20 12:15:02.415: [amf] INFO: RAN_UE_NGAP_ID[3] AMF_UE_NGAP_ID[3] (../src/amf/ngap-handler.c:1399)
01/20 12:15:02.415: [amf] INFO: [Removed] Number of gNB-UEs is now 1 (../src/amf/context.c:2042)
01/20 12:15:02.434: [gmm] WARNING: [suci-0-001-01-0000-0-0-0000000001] Retransmission failed. Stop retransmission (../src/amf/gmm-sm.c:613)
01/20 12:15:02.434: [amf] WARNING: [suci-0-001-01-0000-0-0-0000000001] Authentication reject (../src/amf/nas-path.c:342)
01/20 12:15:32.441: [amf] WARNING: Implicit NG release (../src/amf/amf-sm.c:713)
01/20 12:15:32.443: [amf] WARNING: RAN_UE_NGAP_ID[4] AMF_UE_NGAP_ID[4] (../src/amf/amf-sm.c:714)
01/20 12:15:32.445: [amf] INFO: UE Context Release [Action:3] (../src/amf/ngap-handler.c:1398)
01/20 12:15:32.447: [amf] INFO: RAN_UE_NGAP_ID[4] AMF_UE_NGAP_ID[4] (../src/amf/ngap-handler.c:1399)
01/20 12:15:32.448: [amf] INFO: SUCI[suci-0-001-01-0000-0-0-0000000001] (../src/amf/ngap-handler.c:1402)
01/20 12:15:32.448: [amf] INFO: [Removed] Number of gNB-UEs is now 0 (../src/amf/context.c:2042)
01/20 12:15:32.449: [amf] INFO: [Removed] Number of AMF-UEs is now 0 (../src/amf/context.c:1271)

Do you know what cause the errors? Waiting for your reply.
Best Regards.

[aligungr]

Hi

Please try the latest version, it may fix the error. Indeed 3.2.4 is an old version.

BR