Differences between srsRAN_P GNB vs srsRAN-4G GNB ( HARQ )

[dbsnooper]

I am curious what major differences exist in the two GNB implementations other than ORAN/split related differences.

I just started swapping over from srsRAN[_4G] to srsRAN_Project and have unexpected issues as soon as the srsUE client attaches. From the command line srsUE does not proceed beyond "RRC Connected" when attaching to a seemingly identically configured *nodeB.

In both cases the gNodeB registers with the Open5Gs AMF and receives the log entries on that system.
The RAN and the Core systems are on separate machines, so I can get a pretty clean pcap (couldn't upload here). With srsenb, normal looking NGAP/NAS-5GS messages are exchanged. With gnb, NO MESSAGES are exchanged after the NGSetupResponse from Open5Gs. (ignoring heartbeats for both of those setups).

The only clear issue seems to involve HARQ, but unsure what steps to take in troubleshooting. Any help welcomed, thank you.

outputs.txt
enb.log
gnb.log
ue+enb.log
ue+gnb.log

[pgawlowicz]

Hi,

You can follow this tutorial that shows how to run srsUE with the new gNB.

Moreover, it should be possible to run the srsUE with the same config against the old and the new gNB.

Could you share your configs?

Best,
Piotr

[dbsnooper]

Piotr,

Thank you for taking the time to help! (I forgot to attach the configs, but knew to do so. It's difficult getting old :p ) Attached here.

n3.gnb.yaml.txt
enb.conf.n3.txt
rr.conf.n3.txt
ue.conf.n3.txt

[pgawlowicz]

Hi,

Please find attach a set of configs.zip that allow to connect the srsUE with the old (nr) and new (oran) gnb.
Note that in the case of ORAN gnb, one might need to tune time_adv_nsamples in the ue.conf.* to get the best performance.

Best,
Piotr