LTE NB-IoT, Sidelink, and Special LTE Procedures

What This Covers

NB-IoT procedures adapt LTE access, system information, and measurement behavior for narrowband IoT service.

Sidelink, V2X, relay, remote UE, and NTN-oriented flows cover direct communication and special deployment behavior.

Use the links below to jump directly into NB-IoT, sidelink, V2X, relay, remote UE, and NTN-oriented call flows.

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

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