The course also accounts for procedures for Mobility Management, Security and Policy and Charging Control, as well as interworking with legacy 3GPP (GERAN/UTRAN) and non-3GPP networks.


General knowledge about the architecture, terminology and modes of operation of the GSM/UMTS Packet Switched Core Network is highly recommended. Basic knowledge of the Internet Protocol (IP) family is useful. For required background IP knowledge, the Apis course TCP/IP in Mobile Networks (or equivalent) is recommended.

EPC Introduction

  • 3GPP Core Network evolution
  • Nodes and interfaces introduced for the Evolved UTRAN and Evolved Packet Core (EPC)
  • Basic Concepts: EPS Bearers, PDN Connections

NAS (Non Access Stratum) Protocols – EMM and ESM

  • EPS Mobility Management (EMM) Procedures
  • ESM Session Management (ESM) Procedures
  • Network Attach and PDN Connection Setup
  • Default and Dedicated EPS Bearers

S1AP – the S1 Application Protocol

  • The  S1-MME Interface
  • S1-MME Connections and S1 Connections
  • Main S1AP procedures and use cases

GTP – the GPRS Tunnelling Protocol

  • GTP-C  and GTP-U
  • GTP Tunnels and TEIDs
  • GTP at Session and Bearer setup
  • GTP at UE Mobility scenarios

Mobility in EPS

  • Pool concept for MME and SGW
  • Idle mode mobility  – TA Updates
  • Connected mode mobility  – PS Handovers
  • Context storage in EPS nodes

DNS use in EPS

  • General about DNS
  • DNS procedures for node selection in EPS
  • Selected Traffic Cases – SGW and PGW selection


  • General about Diameter
  • Main Diameter procedures in EPS
  • Selected Traffic Cases

PCC – Policy and Charging Control

  • Purpose of Policy and Charging Control
  • The PCRF and PCEF
  • AF and SPR
  • Service Data Flows (SDFs)
  • PCC Rules

Security in EPS

  • EPS Authentication and Key Agreement
  • User to Network security mechanisms
  • EPS usage of IPsec
  • Network Domain Security mechanisms

Interworking with GERAN/UTRAN

  • Mobility principles between E-UTRAN  and GERAN/UTRAN
  • Idle mode mobility – RA Updates
  • Connected mode mobility – inter-RAT Handover
  • CS Domain interworking – CS Fallback SRVCC

Interworking with Non-3GPP IP-access

  • Trusted and non-trusted non-3GPP access networks
  • Mobility Mechanisms using Mobile IP
  • Selected Traffic Cases

Duration: 3 days


Classroom training: $2410

Virtual classroom training: $2410

We offer substantial discounts for group bookings, and we have corporate rates with most of the operators and equipment suppliers in the world.

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