5G Mobility Procedures
This 5G mobility procedures page groups the main procedures used in this part of the 5G signaling library so you can jump quickly into the right flow for learning, trace reading, or troubleshooting.
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What This Covers
Focuses on handover, tracking area updates, inter-gNB mobility, path switch, and session continuity during movement across the network.
These procedures are useful when you want a focused view of one 5G signaling family rather than the full 5G library.
Use this category page to jump into the main mobility procedures procedures without scanning the broader 5G call flow library.
Intra-NR Mobility
Procedures that keep the UE inside NR while moving between cells, gNBs, or AMF service areas.
- Intra-gNB Handover — Handover between cells under the same gNB
- Inter-gNB Handover — Handover between base stations
- Connected Mode Handover — UE moves between cells
- Inter-AMF Mobility — UE moves between AMF regions
Interworking and Fallback Mobility
Procedures that bridge 5G mobility into LTE or reuse LTE service when native NR continuity is not enough.
- Inter-RAT Handover — 5G to LTE mobility
- LTE to 5G Inter-RAT Handover / Redirection — Return path from LTE toward 5G access
- EPS Fallback Procedure — 5G voice continuity fallback toward LTE
Advanced Mobility Variants
Specialized mobility procedures that cover dual connectivity, inactive-state resume, and non-basic handover branches.
- PSCell / Secondary Cell Change in EN-DC or MR-DC — Dual-connectivity cell-change procedure
- Dual Connectivity Mobility Reconfiguration — Mobility-related multi-node radio reconfiguration
- RRC Inactive Resume with Mobility Context Change — Resume path when mobility changed while inactive