A.35 Monitoring of UE associated NG signalling connection setup in NG-RAN

28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS

The NG signalling connection setup procedure in NG-RAN is to establish signalling connection between gNB and AMF for a given UE.

Whether or not the NG signalling connection is successfully setup has direct impact on the user experience. A failed NG signalling connection setup may directly cause service failure or failure in updating tracking area information for an end user. So, the performance related to the NG signalling connection setup for the gNB needs to be monitored. This can be achieved by the calculation of success rate for UE associated NG signalling connection (number of successful / number of attempted) which gives a direct view to evaluate the setup performance.

Since the intended service is not yet know when establishing the UE associated NG signalling connection, it is not possible to do separation between QoS classes or S-NSSAI.