The course focuses on the network architecture, nodes and mode of operations of the Evolved Packet System (EPS). It accounts for EPS’ relation to – and interoperability with – the legacy 2G/3G network as well as non-3GPP networks. The course outlines key radio technologies selected for LTE e.g. OFDM and MIMO. Basic message-level traffic cases are shown throughout the course to demonstrate important functions and concepts.


General knowledge about the architecture, terminology and modes of operation of the GSM/UMTS radio access and core networks is highly recommended. Basic knowledge of the Internet Protocol (IP) family is useful. For required background knowledge, the Apis course 3GPP Mobile Systems Overview is recommended.

EPS Overview

  • Evolution history of the 2G and 3G networks in operation today
  • EPS architecture and nodes, overall mode of operation
  • Basic concepts: EPS bearers, PDN connections, Quality of Service, etc.
  • Relation to legacy 3GPP networks and other networks

IMS Architecture

  • Multimedia over IP using SIP
  • IMS architecture and basic traffic cases
  • IMS relation to EPS

Evolved UTRAN

  • E-UTRAN nodes and mode of operation
  • E-UTRAN radio interface characteristics and frequency bands
  • Selected E-UTRAN traffic cases

OFDM Basics

  • OFDM (Orthogonal Frequency Division Multiplexing) principles
  • The use of OFDM in E-UTRAN
  • What is MIMO and what can it do?

E-UTRAN Protocols

  • E-UTRAN protocol stacks
  • NAS – Non Access Stratum protocols
  • RRC – Radio Resources Control
  • Layer 2: PDCP, RLC and MAC functions
  • Relay operation
  • Example traffic case

E-UTRAN Channels

  • E-UTRAN channel architecture
  • Logical, Channels, Transport Channels and Physical Channels
  • Mapping of channels on to Radio Resources
  • Layer 1 signal processing
  • Resource allocation considerations and principles
  • Scheduling algorithms examples in eNB

Evolved Packet Core

  • Core network architecture
  • EPC nodes – MME, SGW, PGW and HSS
  • EPS Security
  • Context storage and context transfer
  • Bearers , tunnelling and Quality of Service (QoS)
  • S3/S4 SGSNs and Gn/Gp SGSNs
  • Interworking with non-3GPP IP access networks

EPC Protocols

  • S1AP – the S1 Application Protocol
  • GTP – GPRS Tunnelling Protocol
  • Diameter
  • Relevant Procedures

EPS Mobility

  • Pool concepts for MME and SGW
  • Idle mode mobility scenarios
  • Tracking Area lists
  • Selection principles for MMEs, SGWs, and PGWs
  • Connected mode mobility scenarios
  • Dual registration and Idle mode Signalling Reduction (ISR)

Voice in EPS Networks

  • IMS VoIP calls in EPS
  • CS Fallback principles and SGs interface functions
  • Single Radio Voice Call Continuity (SRVCC) basics and Sv interface functions
  • Service Centralization and Continuity Application Server functions
  • Basics of IMS Centralized Services

PCC – Policy and Charging Control

  • What is Policy and Charging Control?
  • PCC architecture
  • The PCRF and the PCEF
  • Handling of user data / traffic using PCC

Duration: 3 days


Classroom training: $2410

Virtual classroom training: $2410

Recorded training: $1680 Buy now

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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