5G NTN — Non-Terrestrial Networks, visualized end-to-end.
A 11-module in-depth course on 5G NR Non-Terrestrial Networks — LEO · MEO · GEO · HAPS · payloads · SIB19 IEs · timing advance · Doppler compensation · HARQ disable · the full 18-message NAS registration ladder. Animated SVG visuals synced to narration, plus 5 interactive simulators, 22 design scenarios, printable cheat-sheets and 330 quiz questions. 3GPP Rel-17/18/19 aligned. By Abhijeet Kumar.
Six things this course does differently
Built by an engineer who actually works on 5G + NTN deployments, for engineers who need to understand it deeply.
Every 5G NF, deeply
Not just AMF/SMF/UPF. Full coverage of UDM · UDR · AUSF · PCF · NRF · NSSF · SEPP · NEF · CHF · SCP · BSF · LMF · NWDAF — what they do, what fields they carry, how they fail.
- NRF NFProfile bit-by-bit
- SEPP N32-c / N32-f / PRINS
- SMF + UPF PFCP rules
Every IE in every message
Every NR-NTN interface walked end-to-end: NR-Uu service link, SRI/NG/F1 feeder link (depending on payload type), NGAP between gNB and AMF, F1AP between gNB-CU and gNB-DU, PFCP between SMF and UPF, and the full N1-N6 reference points inside the 5G core. Same depth for the SIB19 IE tree.
- NAS · NGAP · SBI bodies
- TS 38.211/213/214/321/331 — every NTN-specific clause walked through
- Bonus: PFCP/N4 rule construction
Animated · narrated · synced
Custom SVG visuals (no slide-deck recordings). Audio narration synced beat-by-beat with on-screen elements. Karaoke-style captions track every word.
- ~4500 visual beats total
- Edge-tts narration · clean audio
- Pause / scrub / fullscreen
Security at engineer depth
Two full lessons on NTN authentication (5G-AKA over satellite) and the GNSS dependency. SUCI/SUPI flow over long RTT, KAUSF/KSEAF/KAMF/KgNB key chain, GNSS as a hard prereq for UE-specific TA and Doppler pre-comp, and what happens when GNSS lock is lost mid-procedure.
- RAND · AUTN · RES* on the wire
- SIDF + ARPF roles
- SoR · UPU · AKMA · NSAC
3GPP NTN + 3GPP aligned · always
Every claim cites a TS spec section. TS 23.501 (architecture), 23.502 (procedures), 24.501 (NAS-5GS), 29.5xx (SBI APIs), 33.501 (security), 38.413 (NGAP), 29.244 (PFCP).
- Reference table per lesson
- Release 15/16/17 distinctions
- No vendor-specific cruft
Lifetime access
Pay once. Watch forever. Re-watch when 3GPP releases an update and we add new lessons at no extra charge.
- No subscription · no auto-renew
- Watch on phone · tablet · desktop
- Audio downloadable for offline
The full curriculum, lesson by lesson
Module 0 — all 6 foundation lessons — is free to preview, no signup needed.
Built by someone who actually works on 5G + NTN.
Abhijeet Kumar
I've spent the last decade across mobile networks — 3G/HSS in production, 5G SA core deployments, and now 5G NR-NTN architecture work. I run the CafeTele 5G Core Hands-on Lab (Open5GS + UERANSIM) used by engineers across India, Europe, the Middle East, and Southeast Asia.
This course is the NTN counterpart to that lab — the same depth I give in private trainings, distilled into a watch-anywhere format. Every episode cites a 3GPP TR or TS section, every diagram is built from scratch, every animation is synced to the narration to the millisecond.
One price. Forever.
Pay once. Watch forever. Future lesson additions included at no extra cost.
NTN — Non-Terrestrial Network Training
Full interactive Masterclass · Watch on any device · No expiry
- All 66 lessons · ~24 hours of synced animation
- Every NR-NTN interface (NR-Uu, SRI, NG, F1, N1-N6) · every IE in SIB19 · every Rel-17/18/19 spec
- Future lesson additions free · no extra charge
- Watch on phone · tablet · desktop
- Razorpay-secured payment · UPI / card / Net Banking
- Free preview · all 6 lessons of Module 0 · no signup needed
Need an invoice for company reimbursement? Email [email protected]
From click to first lesson · under 60 seconds
Pay via Razorpay
UPI / card / Net Banking. Razorpay handles it. You get an instant invoice by email.
Land in the course
Auto-redirect to the course player. All 66 lessons unlock. No verification email, no wait.
Watch · pause · re-watch
Lifetime access. Pick up where you left off. Use the lesson list to jump anywhere.
5 hands-on labs
Once you finish the in-depth lessons, the work isn't done. The course gives you the architecture; the specs give you the depth. Here are the canonical 3GPP documents to keep open while you read your next NTN paper or design review.
All 5 spec references link straight to 3gpp.org · these are the canonical sources every NTN engineer keeps open while reading a design doc.
Common questions
Stop reading slide decks. Start understanding NTN.
66 lessons of animated, narrated, NTN Rel-17 + 3GPP-aligned deep dives. Lifetime access. Module 0 (6 lessons) free first.