VONR call fail in RRC reconfiguration after PDU modification command [ UE send reestablishment ]

[IbrahimBabiker87]

Hello All,

I have setup with all with open5gs and Kamilio IMS
Ims registration working fine both UEs are IMS registered , the PDU session modification command are sent , and Both CU/DU modify bearers correctly, However when sending the rrc reconfiguration to UE the UE mostly dropped and sent rrc reestablishment.

fail_reconfiguration_volte_core.zip

fail_reconfiguration_volte_ran.zip

[herlesupreeth]

I think there is an issue in your gNB. Its not setting the PDU sessions it successfully modified and gNB is sending NG-Reset in the next packet

[IbrahimBabiker87]

Hello @herlesupreeth
thank you for your response,

this is SRSRAN GNB with real RU, DO you have a specific recommended SRSRAN gnb commit ? is the PLMN 999 affect the how the setup behave ? Im using Samsung phone S22 will this have impact ??

[herlesupreeth]

I use the following commit in this repo

git clone https://github.com/herlesupreeth/srsRAN_Project.git && \
    cd srsRAN_Project && git checkout 11c9bbabb69873752500d676f55e0034f6caa5c5

is the PLMN 999 affect the how the setup behave. Im using Samsung phone S22 will this have impact ??

I dont think its the UE or PLMN issue since I see gNB itself sending incomplete response

Have you ensured that you are using the qos.yml file? Are you using CU from srsRAN as well? or CU is from another vendor?

[IbrahimBabiker87]

Hello @herlesupreeth ,

Thank you for your feedback, I used full srsRAN gnb and its working fine, I was using third party CU