UE Fales to attach to the 5G Network

[Moussa-Guemdani]

Issue Description

Hello, I have built the End-To-End 5G Network following the tutorial ""https://docs.srsran.com/projects/project/en/latest/tutorials/source/cotsUE/source/index.html"", but I'm still unable to attach the UE.

Setup Details

Hardware: - RF:USRPx310.

                - Ubuntu 24.04.04.
                - Computer: Dell i7 OptiPlex 7060.
                - UE: OnePlus8Pro (supports n78 SA).
                - sysmoISIM-SJA2

Configs:

                - amf:
                    - addr: 127.0.0.5                                             
                    - bind_addr: 127.0.0.1                                    

                - ru_sdr:
                    - device_driver: uhd                                            
                    - device_args: type=x300                                        
                    - clock: internal                                           
                    - sync: default                                                       
                    - srate: 23.04
                    - tx_gain: 23
                    - rx_gain: 20
                - cell_cfg:
                    - dl_arfcn: 627340
                    - #627340
                    - band: 78
                    - channel_bandwidth_MHz: 20
                    - common_scs: 30
                    - plmn: "20870"
                    - tac: 1
                    - pci: 1 

• 5G core: open5Gs

Actual Behaviour

[pgawlowicz]

did you run this script on the gnb PC? https://github.com/srsran/srsRAN_Project/blob/main/scripts/srsran_performance

Also, could you share the details of the PC? (cpu, ram?)

[Moussa-Guemdani]

Hello, I have ran the script, but stil the same issue,

12 x CPU:

• cpu family : 6
• model : 158
• model name : Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
• stepping : 10
• microcode : 0xf4
• cpu MHz : 800.039
• cache size : 12288 KB
• physical id : 0
• siblings : 12

RAM(MB): total used free shared buff/cache available Mem: 15Gi 5,1Gi 6,6Gi 269Mi 3,7Gi 9,7Gi Swap: 2,0Gi 0B 2,0Gi

[pgawlowicz]

could you share the configs you use?

[Moussa-Guemdani]

Here you are:

[pgawlowicz]

could you check whether this works? https://docs.srsran.com/projects/project/en/latest/tutorials/source/srsUE/source/index.html#usrp-x300-x310

[Moussa-Guemdani]

These are the results after the changes

Configs:

[pgawlowicz]

how is the x310 connected to the gnb PC?

[Moussa-Guemdani]

It is connected using the 10 Gigabit Ethernet via SFP cable

[pgawlowicz]

hmm, could you put addr=X.X.X.X, in the device_args? alternatively, could you try a different uhd version, eg. 4.3?

[Moussa-Guemdani]

Hello, When I Try the use another version of uhd, and run the gnb, I asks me to download another version of uhd that is compatible with srsRAN_Project, Then when I do this and follow the steps, still have the same issue

[pgawlowicz]

ok, could you show the cpu load (htop) while running the srsgnb?

[Moussa-Guemdani]

[s21sm]

If you use commercial UE, program the USIM with PLMN 00101, due to carrier policy UE may not work with other PLMN. You could try PLMN 00101 both side, UE and core

[pgawlowicz]

Could you try uhd-4.3 or higher?

[Moussa-Guemdani]

Hello, I have changed the version to the last version of UHD, and I used PLMN: 00101, It works very fine now

I would like to point out that when I have changed the UHD version on the host computer, when build the gNB again, it shows that the the variables were not used by the project.

Also, even though I have a successful atatch, I still see the Late: 0; Underflow: 1; Overflow: 0; issue

I would like to thank you very much for your help and assistance. @s21sm Thank you very much.

[Moussa-Guemdani]

Hello, after successfully using the project for several days, now the Ue Connects normally, but there is an exclamation mark on the network, and there is no internet access!

I have checked the nat and forwarding rules,

[s21sm]

You may try these

sudo sysctl -w net.ipv4.ip_forward=1
sudo iptables -t nat -A POSTROUTING -s 10.45.0.0/16 ! -o ogstun -j MASQUERADE
sudo iptables -I INPUT -i ogstun -j ACCEPT
sudo ip ro add 10.45.0.0/16 via 10.53.1.2

[Moussa-Guemdani]

You may try these

sudo sysctl -w net.ipv4.ip_forward=1
sudo iptables -t nat -A POSTROUTING -s 10.45.0.0/16 ! -o ogstun -j MASQUERADE
sudo iptables -I INPUT -i ogstun -j ACCEPT
sudo ip ro add 10.45.0.0/16 via 10.53.1.2

HEllo,

I have tried, but the issue is not solved

[pgawlowicz]

@Moussa-Guemdani do you run open5gs in docker or manually installed?

[Moussa-Guemdani]

@pgawlowicz I am running open5gsmanually installed

[pgawlowicz]

did you follow this tutorial? https://docs.srsran.com/projects/project/en/latest/tutorials/source/cotsUE/source/index.html

Did you configure APN in your phone? Please check the troubleshooting section.

[Moussa-Guemdani]

Yes, i did, also with the Access Point.

It worked for some time, after re-build, then Same issue.

I am running the Hannover deployment.

[pgawlowicz]

could you try this one:

sudo sysctl -w net.ipv4.ip_forward=1
sudo sysctl -w net.ipv4.conf.all.forwarding=1
sudo sysctl -w net.ipv6.conf.all.forwarding=1
sudo iptables -t nat -A POSTROUTING -o IFNAME_CONNECTED_TO_INTERNET -j MASQUERADE
sudo iptables -t nat -A POSTROUTING -s 10.45.0.0/16 ! -o ogstun -j MASQUERADE
sudo iptables -P FORWARD ACCEPT
sudo ip ro add 10.45.0.0/16 via 10.53.1.2

[pgawlowicz]

@Moussa-Guemdani any update on this issue?

[Moussa-Guemdani]

Hello, It works very fine fine Thank you for your help.