[Bugs] Registration Status Update Error when connecting to a physical UE

[osamirabo]

Describe the bug

Currently we are trying to deploy a physical setup using the following components:

• Samsung S21 Ultra as UE
• srsRAN and USRP B210 kit as gNB
• free5GC as a core network

but this doesn't happen and instead we got the following error : amf | 2024-05-20T12:10:42.713761098Z [ERRO][AMF][Gmm][amf_ue_ngap_id:RU:0,AU:1(3GPP)][supi:SUPI:imsi-001010000000001] Registration Status Update Error[: server no response]

To Reproduce

Steps to reproduce the behavior:

1. Change config as described in the configs file
2. Add the subscriber in the web console with the corresponding values
3. Run free5GC: docker compose -f docker-compose-build.yaml up
4. Run srsRAN: docker compose -f srsgnb.yaml down
5. Change UE from airplane mode to data

Expected behavior

UE shall connects to 5G network but this don't happen.

Screenshots

Environment (please complete the following information):

• free5GC Version: v3.4.1
• OS: Ubuntu 20.04.6 LTS
• Kernel version: 5.15.0-97-generic
• go version: 1.22.3 linux/amd64
• c compiler version (Option): gcc (Ubuntu 9.4.0-1ubuntu1~20.04.2) 9.4.0

Trace File

Configuration File

config.zip

PCAP File

wireshark_free5g_pcap.zip

Log File

amf.log.txt

amf | 2024-05-20T12:10:42.713761098Z [ERRO][AMF][Gmm][amf_ue_ngap_id:RU:0,AU:1(3GPP)][supi:SUPI:imsi-001010000000001] Registration Status Update Error[: server no response] nrf | 2024-05-20T12:10:42.714954709Z [INFO][NRF][DISC] Handle NFDiscoveryRequest nrf | 2024-05-20T12:10:42.717942641Z [INFO][NRF][GIN] | 200 | 10.100.200.10 | GET | /nnrf-disc/v1/nf-instances?requester-nf-type=AMF&target-nf-type=AMF | amf | 2024-05-20T12:10:42.718718668Z [INFO][AMF][Ngap][amf_ue_ngap_id:RU:0,AU:1(3GPP)][ran_addr:10.100.200.250:45511] Send Reroute Nas Request amf | 2024-05-20T12:10:42.719221065Z [ERRO][AMF][Gmm] AMF can not select an target AMF by NRF

System architecture

free5GC is deployed using docker

Walkthrough

It seems that the mobile RequestedNssai - ServingSnssai: &{Sst:1 Sd:}, but we cannot configure free5GC to accept Sd = "". We tried to reset ore set SD from the mobile but we don't succeeded.

[ianchen0119]

Hi @osamirabo

This issue will be fixed in the next release. Thanks for your information.

[linouxis9]

Hi @osamirabo,

In the meanwhile, does it work if you configure your network functions with sd: "ffffff"

Valentin

[osamirabo]

@ianchen0119 Great to hear it will be fixed in next release. Thank you for your quick response.

[osamirabo]

@linouxis9 I tried using sd: "ffffff" but still have the same issue

[ianchen0119]

@osamirabo Did you set the related slice (sd: ffffff) in NF configurations?

Thanks.

[osamirabo]

@ianchen0119

Yes I set it in the configuration files and in the webconsole interface also. Please find the config files attached config_0xffffff.zip

Thank You