A.34 Monitoring of RRC connection setup in NG-RAN

28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS

RRC connection setup is one of most important step to start delivering services by the networks to users, (see TS 38.331 [20]).

Whether or not the RRC connection is successfully setup has direct impact to the user experience. A failed RRC connection setup may cause service failure or failure in updating tracking area information for an end user. So, the performance related to the RRC connection setup for the gNB needs to be monitored. This can be achieved by the calculation of RRC connection setup success (or failure) rate (number of successful (or failed) / number of attempt) which gives a direct view to evaluate the RRC connection setup performance, and the analysis of the specific reason causing the failure to find out the problem and ascertain the solutions.

Since the intended service is not yet know when establishing the RRC connection, it is not possible to do separation between QoS classes or S-NSSAIs.