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srsran / srsRAN_Project

Open source O-RAN 5G CU/DU solution from Software Radio Systems (SRS) https://docs.srsran.com/projects/project
https://www.srsran.com
GNU Affero General Public License v3.0
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Trying to replicate the srsRAN gNB with COTS UEs Tutorial #886

Open panitsasi opened 1 week ago

panitsasi commented 1 week ago

Issue Description

Hi all, I am trying to replicate the srsRAN gNB with COTS UEs Tutorial but I am having several issues. First of all, these are the specs of the PC that I use to replicate the tutorial: 24-Core 4.20 GHz AMD Threadripper Pro, 128 GB RAM(2 x 64 GB 4800 MHz DDR5 ECC/REG), Ubuntu 22.04 OS. Regarding the gNB configuration, I used exactly the same parameters as you specified, using USRP B210 and OpenPlus 8T TMO. image.

For the SIM programming, i use the Gemalto IDBridge CT30 USB Smart Card Reader Writer and as programmable SIM cards I use SysmoISIM-SJA2 . For, instance i have one SIM card with the following details: image

To program the SIM card, I used the following instruction: ./pySim-prog.py -p0 -s --mcc= --mnc= -a --imsi= -k --opc= ./pySim-prog.py -p0 -s 8949440000001288206 --mcc=001 --mnc=01 -a 27044531 --imsi=999700000128820 -k 22096A80F5E0A80387EB18C905450A07 --opc=771E373D290E3DFC9018978771BAB20E Screenshot from 2024-10-21 13-26-46

Finally, when i re-read the SIM card, I did not see the services 125, 126. (read_SIM.txt attached) read_SIM.txt

Is there any mistake here ? I did not configure SUCI, because the services were not enabled.

Also, I added the UE information in open5GS subscriber database.

image image

I used as subscriber key : KI, opc: OPC, AMF: 8000 (i am not sure about this), DNN/APN: srsran, Type: ipv4 Is everything looks okay with the previous configuration ?

I am not sure, because when I try to create a APN in my OnePLUS 8T TMO, I see that the MCC = 999 and MNC = 70 which it does not make sense. I am trying to change these values to 001 and 01 respectively but the APN cannot be created. image

Also, I am facing issues when I am trying to enable 5G for the UE. image image Does anyone had the same issues?

I tried to replace the OnePlus 8T with a Google Pixel 7 but i had the same issues except the 5G connectivity. image image

For the core network, I used these conf_files for amf and nrf. amf_configuration.txt nrf_configuration.txt

Everything is running locally, so i did not change the upf.yaml file.

The core network is running properly, and the gnb can connect with the core. image image

Unfortunately, the UE cannot connect to the network, probably due to SIM/APN misconfiguration. Any hints would be much appreciated. Thank you.

fllay commented 1 week ago

You configuration file has plmn = 90170 but your SIM card is 99970

999700000128820

panitsasi commented 1 week ago

Yes, that's true. I modified it but it did not work. I am trying to replicate the roaming scenario that's why the UE PLMN is different from the core PLMN.

gNB configuration file image

AMF configuration file image

NRF configuration file image

gNB is connecting to Core Network image image

SIM configuration after reprogramming it image image

Updated the Core database with the SIM information image image

Enable the SIM, roaming and create APN image image

When i tried to search for the network, the UE did not find it. Does anyone faced similar issue ? Thanks.