Training Solutions

LTE and GSM/UMTS Interworking

The major focus of this course is the interworking between UMTS/HSPA and LTE. The course begins with a brief overview of LTE and 3GPP 2G/3G network architectures and requirements for interworking. The building blocks that support interworking between LTE and UMTS/HSPA are discussed in detail, including the new interfaces, hybrid device capabilities, and radio/core network mechanisms. Different interworking/mobility scenarios are listed and detail message flows are given. LTE is optimized for the delivery of IP services including VoIP. It can also cooperate with a 2G/3G Circuit-Switched (CS) call to support Single Radio Voice Call Continuity (SRVCC) and CS fallback. The course also previews IP mobility mechanisms, security, and QoS considerations. In summary, the course provides both the architectural features and the detail message flows of the interworking between LTE and 3GPP 2G/3G.

Learning Objectives

After completing this course, the student will be able to:
• Sketch the LTE architecture, including interfaces to GERAN/UTRAN
• Describe components/interfaces that make up the LTE core network and their roles in the interworking
• List requirements for LTE and 2G/3G interworking
• Sketch the interworking architecture of LTE and GERAN/UTRAN
• List and explain the building blocks for LTE and GERAN/UTRAN interworking
• Walk through an LTE session setup
• Enumerate the steps involved in idle mode mobility
• Walk through the steps of an active mode handover
• Discuss the role of IMS in LTE
• Define SRVCC and CS fallback in LTE

Intended Audience

This course is designed for those involved in the evolution and migration of UMTS/HSPA networks to LTE networks. It is suitable for planners and engineers responsible for network planning, design and deployment, integration and network operations.

Suggested Prerequisites

• LTE Overview (eLearning)
• LTE SAE Evolved Packet Core (EPC) Overview (eLearning)
• Mastering LTE (Instructor Led)

Course Length

2 Days Instructor Led

Course Outlines / Knowledge Knuggets

1. Interworking: Executive Summary
1.1. Evolution from GSM/GPRS and UMTS/HSPA to LTE
1.2. Interworking architecture
1.3. Overview of interworking scenarios
1.3.1. UTRAN/GERAN access
1.3.2. Active mode handover
1.3.3. Idle mode mobility

2. Interworking Network Architecture
2.1. Pre-R8 and R8 UMTS and GERAN architecture
2.2. LTE-EPC architecture
2.3. Interworking architecture – Pre-R8 and R8
2.4. Non-roaming and roaming architecture
2.5. Network interfaces between UMTS/GERAN and EPC – S3, S4, S12, Gp, Gr and Gn
2.6. Network identities
2.7. Protocols – GTPv1 and GTPv2
2.8. End-to-end user and control plane message flow

3. Building Blocks of Interworking
3.1. Inter-technology communication
3.1.1. RAN Information Management (RIM) procedure
3.1.2. Delivery of system information
3.1.3. Convey the handover command
3.2. Hybrid device capabilities
3.3. Radio access network features
3.3.1. Measurements control and report
3.3.2. Handover algorithms
3.4. Core network mechanisms
3.4.1. IP mobility management
3.4.2. Security/QoS consideration

4. Initial Session Setup
4.1. Access network discovery and selection
4.2. Attach procedure
4.3. PDN GW selection

5. Idle Mode Interworking
5.1. Idle mode cell reselection
5.2. Idle mode measurements
5.3. Tracking and routing area updates
5.4. Idle–state signaling reduction

6. Connected Mode Interworking
6.1. Connected Mode IRAT HO
6.2. Measurements in connected mode
6.3. LTE-to-UTRAN Pre-R8/R8
6.4. UTRAN-to-LTE R8
6.5. LTE to GERAN
6.6. GERAN to LTE (PS handover)
6.7. QoS mapping

7. Circuit-Switched Interworking
7.1. Voice in LTE and IMS
7.2. CS fallback
7.3. SRVCC
7.4. IMS service centralization and continuity

CATALOG

Download our course catalog!

2010 Catalog,
pdf format (7.8 MB)