A.13 Registration related measurements
28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS
A UE needs to register with the 5GS to get authorization to receive services, to enable mobility tracking and to enable reachability. The following registration types are defined:
– Initial Registration to the 5GS;
– Mobility Registration Update (upon changing to a new Tracking Area (TA) outside the UE’s Registration Area in both CM-CONNECTED and CM-IDLE state, or when the UE needs to update its capabilities or protocol parameters that are negotiated in Registration procedure with or without changing to a new TA);
– Periodic Registration Update (due to a predefined time period of inactivity); and
– Emergency Registration (i.e. the UE is in limited service state).
The registration may be via 3GPP access, or via untrusted or trusted non-3GPP access.
The performance of registration for each registration type needs to be monitored by the operator since it is relevant to whether the end user can use the service of 5GS or a specific network slice. The performance of registration via 3GPP access and non-3GPP access (including untrusted and trusted non-3GPP access) needs to be monitored respectively.