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Interactive Simulation Labs

NTN & Satellite Communication Labs

Eleven hands-on, spec-accurate labs covering Non-Terrestrial Network architecture, timing, random access, mobility, and handover — each one an interactive tool you can run directly in your browser.

3GPP TR 38.821

Non-Terrestrial Network Labs

Satellite platform architecture, timing, random access, mobility, and handover simulations — spec-referenced throughout.

TR 38.821

NTN Platform Visualizer & Comparator

Compare GEO/LEO satellite scenarios, RTD, and Doppler shift with a live orbit visualization.

Launch Lab
TR 38.821

NTN Architecture Builder

Build and explore the NTN protocol stack across transparent and regenerative payload architectures.

Launch Lab
TR 38.821 §6.2.1

Uplink Timing Advance — Visualizer 1

NTN timing relationships and synchronization, primary solution.

Launch Lab
TR 38.821 Fig 6.2.1-2

Uplink Timing Advance — Visualizer 2

NTN timing relationships, alternative solution.

Launch Lab
TR 38.821

PRACH Preamble Ambiguity & RACH Config

Explore random access preamble ambiguity and RACH configuration under satellite propagation delay.

Launch Lab
TR 38.821

HARQ Process Management Simulator

Stop-and-wait HARQ process management adapted for long satellite round-trip delays.

Launch Lab
TR 38.821

DRX Enhancement Simulator

Discontinuous Reception enhancements for NTN, balancing power saving against latency.

Launch Lab
TR 38.821

Conditional Handover (CHO) Lab

CHO triggering conditions and decision logic for fast-moving LEO satellite handovers.

Launch Lab
TR 38.821

Handover Rate & Signaling Load Estimator

Estimate handover frequency and signaling overhead across different satellite constellations.

Launch Lab
TR 38.821

Tracking Area Configuration Lab

Compare Earth-fixed vs. Earth-moving tracking area configurations for NTN.

Launch Lab
TR 38.821 §8.7

Feeder Link Switchover Simulator

Simulate make-before-break and break-before-make feeder link switchover across gateways.

Launch Lab

Want Guided Training on These Labs?

These simulations pair directly with our JobReady 5G & Telecom Expert track — trained by a dedicated mentor, not just self-study.