LTE NB-IoT, Sidelink, and Special LTE Procedures

What This Covers

This category covers LTE branches that sit outside the main baseline call-flow groupings.

Common nodes depend on the feature, but most special LTE paths still reuse the standard access, RRC, NAS, and security foundations.

These pages matter when the deployment uses LTE variants or procedure paths beyond standard handset-oriented workflows.

NB-IoT Access and System Information

Procedures that support NB-IoT access and system information handling.

• LTE NB-IoT Access Procedure — NB-IoT access entry path.
• LTE NB-IoT System Information Acquisition — NB-IoT broadcast and system information acquisition path.

NB-IoT Measurement and Optimization

Procedures that support NB-IoT measurement and optimization behavior.

• LTE NB-IoT Measurement Procedure — NB-IoT measurement and optimization path.

Sidelink Communication

Procedures that support LTE sidelink communication behavior.

• LTE Sidelink Procedure — Main LTE sidelink communication path.
• LTE V2X Sidelink Procedure — Vehicle-oriented sidelink communication path.

Relay and Special Cases

Procedures that support relay behavior and special LTE deployment cases.

• LTE Relay Node Reconfiguration — Relay-node reconfiguration path.
• LTE Sidelink Relay UE Procedure — Relay UE path for sidelink service.
• LTE Remote UE Relay Procedure — Remote UE relay handling path.
• LTE NTN-Oriented Special Cases — Special LTE cases with NTN-oriented handling.

Related References

Related Sub-Procedures

• LTE Security Architecture — Special LTE paths still depend on core security context.
• LTE-Advanced, Dual Connectivity, and WLAN Procedures — Compare with other non-baseline LTE branches.

Related Message Reference Pages

• RRC Connection Setup — Baseline dedicated signaling setup still matters in many special paths.
• Security Mode Command — Security activation remains relevant in special LTE handling.

Related Troubleshooting Pages

• 3GPP Decoder — Inspect message fields when special LTE traces differ from standard handset behavior.
• LTE EARFCN Calculator — Validate radio context during specialized LTE deployment work.

Related LTE Categories

• LTE-Advanced, Dual Connectivity, and WLAN Procedures
• Access and Registration Procedures
• RRC Connection and Security Procedures

SEO Support

Suggested breadcrumb: Home > Call Flows > LTE > NB-IoT, Sidelink, and Special LTE Procedures

Suggested internal links: /lte/protocols/rrc/ | /lte/protocols/nas/ | /lte-ue-initial-access/ | /lte-security-architecture/

Suggested schema type: CollectionPage

Suggested page description: Directory-style LTE hub for NB-IoT, sidelink, and other special LTE procedure paths.