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5G NR PDCP Mastery โ€“ Complete TS 38.323 with Hands-On Log

by Rajesh Kumar ยท in General ยท Last updated: August 8, 2026
Course Description
Master the Packet Data Convergence Protocol (PDCP) layer of the 5G NR Layer-2 protocol stack by learning directly from the 3GPP TS 38.323 specification. This course is designed for telecom professionals, protocol developers, protocol testers, system engineers, and students who want an in-depth understanding of how PDCP operates in commercial 5G networks. PDCP is responsible for critical functions such as header compression, security, sequence number management, duplication, routing, reordering, and reliable packet delivery, making it one of the most important layers in the 5G protocol stack.
Unlike theoretical courses, this training explains every major PDCP procedure with practical examples, protocol flow diagrams, and Amarisoft Test Bed log analysis, enabling you to understand not only what the specification says but also how PDCP behaves in a real network implementation.




What You Will Learn

Complete understanding of the 5G NR PDCP architecture as defined in 3GPP TS 38.323
PDCP services and functional architecture
User Plane and Control Plane data transfer procedures
PDCP Sequence Number (SN) management
COUNT value generation and maintenance
Header Compression and Decompression using ROHC
Detailed study of ROHC operating modes:

U-Mode (Unidirectional)
O-Mode (Optimistic Bidirectional)
R-Mode (Reliable Bidirectional)


ROHC packet validation using PCAP analysis
Ciphering and Deciphering procedures
Integrity Protection and Verification
Timer-Based SDU Discard
PDU Set Discard procedure
Split Bearer routing and DAPS Bearer operation
PDCP Duplication and Duplicate Discarding
Reordering and In-Order Delivery
PDCP Data PDU formats and header fields
PDCP protocol parameters and configuration
Practical PDCP log analysis using Amarisoft Test Bed




Hands-On Practical Sessions
This course goes beyond the specification by including practical demonstrations such as:


Amarisoft PDCP Log Analysis
Packet flow interpretation
PCAP validation of ROHC operation
Identification of PDCP Sequence Numbers
Security procedure analysis
Understanding PDCP message flow in real deployments
Troubleshooting PDCP packet processing




Course Highlights

โœ… Based completely on 3GPP TS 38.323
โœ… Industry-oriented practical explanations
โœ… Protocol flow diagrams for every major procedure
โœ… Amarisoft Test Bed demonstrations
โœ… PCAP-based protocol validation
โœ… Suitable for Developers, Test Engineers, Integration Engineers, and Optimization Engineers
โœ… Covers concepts frequently asked in Telecom Interviews




Who Should Enroll?

5G Protocol Stack Developers
L2 Software Engineers
Protocol Testing Engineers
Telecom R&D Engineers
Wireless Communication Engineers
Integration & Validation Engineers
Field Support Engineers
Telecom Students and Researchers
Anyone preparing for 5G protocol interviews




Prerequisites

Basic understanding of the OSI Model
Basic knowledge of 4G/5G architecture
Familiarity with Layer-2 protocols (recommended but not mandatory)




After Completing This Course
By the end of this course, you will be able to:


Explain every major PDCP function defined in TS 38.323.
Understand how PDCP interacts with RLC, RRC, and upper layers.
Analyze PDCP packet flow in commercial 5G networks.
Debug PDCP issues using Amarisoft logs and PCAP traces.
Understand security processing, header compression, duplication, and packet reordering.
Apply specification knowledge during protocol development, testing, integration, and troubleshooting activities.External Reference:
https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3196Internal Reference:
https://edunavo.com/courses/5g-l2-stack-mastery/


[migrated-from-learnpress]

Curriculum

9 Sections โ€ข 25 Lessons โ€ข 4h 55m
1.11.1 Transfer of Data (User Plane & Control Plane) Preview 9 minute
1.21.2 Maintenance of PDCP Sequence Numbers (SNs) 6 minute
1.31.3 Header Compression & Decompression (ROHC) 9 minute
1.41.4 Ciphering & Deciphering (Encryption) 7 minute
1.51.5 Integrity Protection & Verification 5 minute
1.61.6 Timer-Based SDU Discard 4 minute
1.71.7 PDU Set Discard 4 minute
1.81.8 Routing (Split Bearers & DAPS Bearer) 0 minute
1.91.9 Duplication 5 minute
1.101.10 Reordering & In-Order Delivery 6 minute
1.111.11 Duplicate Discarding 2 minute
2.1PDCP Entity-TX Side 22 minute
2.2PDCP Entity-RX Side 9 minute
3.1Module3: Services (TS 38.323 4.3.1) 15 minute
4.1Robust header compression and decompression TS 38.323 5.7 19 minute
4.2ROHC Modes in 5G: Unidirectional Mode (U-mode) 14 minute
4.3U-mode PCAP validation 3 minute
4.4Bidirectional Optimistic Mode (O-mode)- TS 38.323/RFC 3095 6 minute
4.5Bidirectional Reliable Mode (R-mode) 6 minute
4.6Header decompression using ROHC Flow Diagram (TS 38.323 5.7.5) 15 minute
5.1Ciphering and deciphering Deep Drive (TS 38.323 5.8) 22 minute
6.1Integrity Protection and Verification Deep Drive (TS 38.323 5.9) 38 minute
7.1PDCP Data Structure (TS 38.323 6.2.2/6.2.3) 13 minute
8.1PDCP Structure Parameter (TS 38.323 6.3) 22 minute
9.1Hands On: PDCP Log analysis Deep Drive Amarisoft Test Bed 34 minute

Instructor

R

Rajesh Kumar

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