3GPP 23.501 v20.2.0 — the document's own text
5.3.4.2 Mobility Pattern
Taught in 9. Registration, reachability and paging (The 5G system architecture, in depth).
The Mobility Pattern is a concept that may be used by the AMF to characterise and optimise the UE mobility. The AMF determines and updates Mobility Pattern of the UE based on subscription of the UE, statistics of the UE mobility, network local policy and the UE assisted information, or any combination of them. The statistics of the UE mobility can be historical or expected UE moving trajectory. If NWDAF is deployed, the statistics of the UE mobility can also be analytics (i.e. statistics or predictions) provided by the NWDAF (see TS 23.288 [86]).
The Mobility Pattern can be used by the AMF to optimize mobility support provided to the UE, for example, Registration area allocation.