[srsran-users] Problems connecting srsUE to gNB using ZeroMQ

[Jan Håkegård]

Hi Paul,

The pcap files are attached.

Best regards,
Jan

From: Paul Sutton <paul at srs.io>
Sent: onsdag 10. mai 2023 11:30
To: Jan Håkegård <Jan.E.Hakegard at sintef.no>; srsran-users at lists.srsran.com
Subject: Re: [srsran-users] Problems connecting srsUE to gNB using ZeroMQ

Hi Jan,

Can you share your MAC and NGAP pcap files?

Thanks,
Paul
On 10/05/2023 11:25, Jan Håkegård wrote:
Hi,

I'm trying to connect a srsUE to a gNB using ZeroMQ based on the example in the srsRAN Project documentation. The UE connects to the gNB (RRC connected), but the PDU Session is not established. The gNB connects to the Open5GS core network, according to the AMF log:

05/10 10:50:30.805: [amf] INFO: gNB-N2 accepted[127.0.0.1]:41358 in ng-path module (../src/amf/ngap-sctp.c:113)
05/10 10:50:30.805: [amf] INFO: gNB-N2 accepted[127.0.0.1] in master_sm module (../src/amf/amf-sm.c:741)
05/10 10:50:30.805: [amf] INFO: [Added] Number of gNBs is now 1 (../src/amf/context.c:1178)
05/10 10:50:30.805: [amf] INFO: gNB-N2[127.0.0.1] max_num_of_ostreams : 30 (../src/amf/amf-sm.c:780)

When I start the UE, nothing happens with the AMF log, MME log or any of the other core network logs.

Looking at the MAC PCAP file shows the following:

[cid:image001.png at 01D98338.B0282B10]

Looking at the NGAP PCAP file shows the following:

[cid:image002.png at 01D98338.B0282B10]

Comparing the core network config files mme.yaml and amf.yaml, the gNB and UE config files (including the SIM details), I can't find any errors. Does anyone have any explanation? Are there other config files I should look at?

Best regards,
Jan



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