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PDCP 5G NR · Video Course · 24 Lessons · 200 min

PDCP, visualized end-to-end.

A 24-lesson in-depth course into PDCP for 5G NR — every bit, every IE, every procedure. Twelve theory lessons in Module A. Twelve hands-on labs in Module B (srsRAN · OAI · open5gs · Qualcomm QXDM · Apple sysdiagnose · Samsung Shannon). Animated SVG visuals synced to narration. By Abhijeet Kumar.

Get lifetime access · 🎉 30% OFF · ₹559 / $8.39 Watch 3 free lessons
Lifetime access · no expiry ~3h 20m · 24 lessons UPI · Card · Net Banking
cafetele.com / pdcp-course / Lesson 12 · Real PDCP Test Bench
Lesson 01
Where PDCP lives
L2 stack tour · SDAP · RLC · MAC
11:02 · 240 beats
Free preview
Lesson 02
PDCP entities
SRB vs DRB · UM vs AM
10:06 · 240 beats
Free preview
Lesson 08 · TX
TX end-to-end
SN · cipher · MAC-I · 7-stn line
8:30 · kinetic line
Unlocked
Lesson 11 · Anchor
Status + Re-est
handover · COUNT continuity
9:07 · 5-step procedure
Unlocked
Lab 01 · Test bench
srsRAN + OAI
open5gs · real gnb.yml · log lines
13:31 · 280 beats · 11 phases
Unlocked
Lab 12 · Capstone
PDCP fuzz harness
pytest · scapy · GitHub Actions
8:50 · ship to CI
Unlocked
What's inside

Six things this course does differently

Built by an engineer who actually ships 5G L2 code, for engineers who need to debug it in the field.

Every PDCP function, deeply

Sequence numbering · ROHC + EHC compression · NEA1/2/3 ciphering · NIA1/2/3 integrity · TX · RX · duplication · status reporting · re-establishment. Every function its own lesson. Every IE walked through.

  • SN · HFN · COUNT walked bit-by-bit
  • Real MAC-I 4-byte tag math
  • NEA / NIA family explained

Every byte on the wire

PDCP Data PDU layouts (12-bit and 18-bit SN). Control PDU formats (Status Report · ROHC Feedback · EHC Feedback). Worked hex examples. Wireshark NR-PDCP dissection.

  • 3GPP TS 38.323 §6.2 byte-by-byte
  • Status Report bitmap explained
  • Interspersed Feedback Control PDUs

Animated · narrated · synced

Custom SVG visuals (no slide-deck recordings). Audio narration synced beat-by-beat. Kinetic production-line animations for TX / RX / duplication flows.

  • ~5,640 visual beats total
  • Edge-tts narration · clean audio
  • 61 quiz sets · ~295 questions

Real labs · multiple vendors

12 hands-on labs with srsRAN + OpenAirInterface + open5gs. Real configs (gnb.yml + libconfig). Real log excerpts from each stack. Plus vendor traces: Qualcomm QXDM · Apple sysdiagnose · Samsung Shannon CP.

  • Bring up gNB + UE + 5GC on one laptop
  • Decode a real DRB Data PDU byte-by-byte
  • Inject integrity failures · watch RLF

3GPP-aligned · always

Every claim cites a TS spec. TS 38.323 (PDCP) · TS 37.324 (SDAP) · TS 38.322 (RLC) · TS 33.501 (security) · TS 38.523-1/3 (conformance). Release 15 → 19 distinctions explicit.

  • Reference card section
  • 30 formal TS 38.523-style test cases
  • Full pdcp-Config IE breakdown

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
  • 5 reference pages (no audio · searchable)
Syllabus · 24 lessons · ~3h 20m

The full curriculum, lesson by lesson

Lessons 00, 01 and 02 are free preview — no signup needed.

00Welcome — why PDCP matters2:25FREE 01Where PDCP lives — L2 stack tour11:02FREE 02PDCP entities — SRB · DRB · UM · AM10:06FREE 03Sequence numbering — SN · HFN · COUNT9:18 04Headers on the wire — Data + Control9:23 05Header compression — ROHC + EHC7:41 06Ciphering — NEA0/NEA1/NEA2/NEA38:23 07Integrity protection — NIA · MAC-I8:01 08TX procedure end-to-end8:30 09RX procedure end-to-end7:55 10Duplication for URLLC8:38 11Status reporting + Re-establishment9:07 12Lab 1 — Real PDCP test bench (srsRAN + OAI + open5gs)13:31 13Lab 2 — Decode a real DRB Data PDU (Qualcomm QXDM)7:59 14Lab 3 — Ciphering boundary + key change (Apple)8:06 15Lab 4 — Reordering edge cases (t-Reordering, HFN wrap)7:20 16Lab 5 — PDCP duplication for URLLC7:21 17Lab 6 — Header compression interop (ROHC)7:41 18Lab 7 — Integrity failure → RLF (Samsung Shannon)7:03 19Lab 8 — Handover stress + COUNT continuity7:48 20Lab 9 — Conformance tests (TS 38.523-1/3)8:06 21Lab 10 — Performance KPIs7:40 22Lab 11 — Field debug · real 'no Internet' root cause7:59 23Lab 12 — Capstone: PDCP fuzz harness + CI8:50
Your trainer

Built by someone who actually ships RAN code.

A

Abhijeet Kumar

5G RAN / Core Engineer · CafeTele Founder · Author of the in-depth O-RAN + 5G Core courses

I've spent the last decade in mobile networks — from 3G/4G modem firmware to 5G NR L2 stacks in production. PDCP is the layer I have debugged the most: ciphering boundaries, HFN drift, ROHC desync, handover races. The kind of bugs that make a phone show full bars and zero throughput.

This course is the deep-dive companion to the labs I run. Every lesson cites a 3GPP spec section. Every diagram is built from scratch. Every animation is synced to the narration to the millisecond. The Module B labs walk you through real configs and real log excerpts you can reproduce on your own laptop.

10+ yrs telecom L1-L3 3GPP rel 15-19 srsRAN · OAI · open5gs Modem firmware debugging cafetele.com founder
Pricing · One-time payment · Lifetime access

One price. Forever.

Pay once. Watch forever. Future lesson additions included at no extra cost.

Lifetime · No subscription

PDCP 5G NR — End-to-End

24 lessons · ~3h 20m synced animation · 12 labs · 5 reference pages · No expiry

🎉 LAUNCH OFFER · 30% OFF
$ 8.39 one-time
$11.99 · save 30%
≈ ₹559 INR ₹799 · charged in INR via UPI / card / Net Banking
  • All 24 lessons · 200 minutes synced animation
  • 12 hands-on labs · srsRAN · OAI · open5gs · QXDM · Apple · Samsung
  • 5 reference pages · test cases · PDU formats · IEs · keys · timers
  • 61 quiz sets · ~295 questions
  • Future lessons free · no extra charge
  • Razorpay-secured payment · UPI / card / Net Banking
  • Free preview lessons 00, 01, 02 · no signup needed

Need an invoice for company reimbursement? Email [email protected]

How it works

From click to first lesson · under 60 seconds

01

Pay via Razorpay

UPI / card / Net Banking. Razorpay handles it. You get an instant invoice by email.

02

Land in the course

Auto-redirect to the course player. All 24 lessons unlock. No verification email, no wait.

03

Watch · pause · re-watch

Lifetime access. Pick up where you left off. Use the lesson list to jump anywhere. 5 reference pages alongside.

Or just watch the 3 free lessons first
FAQ

Common questions

Yes. One payment of ₹799 / $11.99 and you have access forever — no auto-renew, no card-on-file. We add new lessons as 3GPP releases land or vendors push new traces; existing customers get them free.
Lessons 00 (Welcome), 01 (Where PDCP lives), and 02 (PDCP entities) in full — about 23 minutes of fully-animated, narrated content. No signup needed. Open /pdcp-course/ directly.
YouTube tutorials are usually slide-deck recordings. This course is a custom-built animation engine where every diagram is drawn from scratch and synced to the narration beat-by-beat. The Module B labs use real configs and real log excerpts you can reproduce on your own laptop with srsRAN + OAI + open5gs.
Modem firmware engineers, RAN L2 protocol stack engineers, system test engineers, and field debugging engineers who deal with PDCP issues. If you've ever stared at a "5G bars but no Internet" ticket and wondered if it was PDCP, this course is for you.
Yes. Razorpay sends an invoice automatically. For a custom-format invoice (company name, GSTIN, etc.), email [email protected] after payment.
Different focus. The 5G Core course covers the network functions (AMF, SMF, UPF, etc.). This PDCP course is L2 protocol layer on the RAN side. Many engineers buy both — together they give you a complete picture of the 5G data path from UE to UPF.
Primary baseline is Release 15 + 16 (the most-deployed). Key Rel-17 additions are called out (EHC for industrial 5G, n-route duplication, etc.). Rel-19 PDCP additions noted where relevant. All spec citations are to current TS 38.323 versions.
Watch the 3 free lessons first to see if the style works for you — that's the best filter. After purchase, if there's a technical issue (audio doesn't play, video stutters, login broken), email [email protected] and we'll fix it or refund within 7 days.

Stop reading TS 38.323 PDFs. Start seeing the bytes move.

24 lessons of animated, narrated, 3GPP-aligned deep dives. 12 hands-on labs. Lifetime access. Three free lessons first.

Watch 3 free lessons
🎉 30% OFF · ₹559 / $8.39 Lifetime access · 24 lessons