LTE Mobility and Handover Procedures
This hub groups the LTE procedures used when the UE moves between cells, tracking areas, or radio technologies.
Quick Links
- LTE Intra-LTE Handover Procedure
- LTE Intra-Frequency Handover
- LTE Inter-Frequency Handover
- LTE X2 Handover Procedure
- LTE S1 Handover Procedure
- LTE Inter-RAT Handover Procedure
- LTE Mobility From E-UTRA Procedure
- LTE Handover to UTRAN
- LTE Handover to GERAN
- LTE Handover to CDMA2000
- LTE Measurement-Controlled Handover
- LTE Handover Failure and Recovery
- LTE Conditional Handover / Conditional Reconfiguration
What This Covers
This category covers LTE movement-related procedures across idle mobility, TAU, and connected handover.
Common nodes are the UE, source and target eNBs, MME, SGW, and related EPC functions.
These procedures matter because continuity failures often appear during movement, not initial registration.
Intra-LTE Mobility
Procedures that move the UE between LTE cells while staying inside LTE service.
- LTE Intra-LTE Handover Procedure — Main intra-LTE handover continuity flow.
- LTE Intra-Frequency Handover — Handover within the same LTE frequency layer.
- LTE Inter-Frequency Handover — Handover across different LTE frequency layers.
Handover by Interface Type
Procedures grouped by the interface used to coordinate the handover.
- LTE X2 Handover Procedure — eNB-to-eNB handover using X2 signaling.
- LTE S1 Handover Procedure — Core-assisted intra-LTE handover using S1 signaling.
Inter-RAT Mobility
Procedures that move the UE between LTE and other radio technologies.
- LTE Inter-RAT Handover Procedure — Main inter-RAT mobility continuity path.
- LTE Mobility From E-UTRA Procedure — Leaves LTE toward another radio technology.
- LTE Handover to UTRAN — Inter-RAT handover from LTE to UMTS.
- LTE Handover to GERAN — Inter-RAT handover from LTE to GSM.
- LTE Handover to CDMA2000 — Inter-RAT handover from LTE to CDMA2000.
Handover Control and Recovery
Procedures that control handover decisions or recover when mobility does not complete cleanly.
- LTE Measurement-Controlled Handover — Measurement-driven handover decision and execution path.
- LTE Handover Failure and Recovery — Recovery path after interrupted mobility continuation.
- LTE Conditional Handover / Conditional Reconfiguration — Conditional mobility execution and preparation path.