GSM, the most popular 2G global standard, still commands a significant bulk of the global cellular market. The course begins with the fundamental cellular concepts and builds rapidly to give a technical overview of GSM, GPRS and EDGE network architecture, protocols and procedures.
EXPECTED ACCOMPLISHMENTS
- Outline GSM architecture and GPRS extensions to GSM
- Differentiate between a GSM CS and a GPRS PS calls
- Compare performance of coding and modulation schemes employed in GSM, GPRS and EDGE
- Outline the GPRS and EDGE protocol stack and describe functionality
- List the frame structure and channels required for GSM/GPRS/EDGE
- Explain how radio resources are allocated on the uplink and downlink for packet transfer
- Describe Mobility Management PDP context activation procedures
- Explain how packets are transferred over the air interface
- Explain GSM call setup procedures
- Describe GPRS tunneling and call setup procedures
- Describe architectural requirements for roaming and the role of GRX
TARGET AUDIENCE
Managers, Engineers, and Technicians involved in the planning, deployment and maintenance of mobile networks
COURSE DETAILS
GSM Fundamentals
- GSM BSS and NSS Network Architecture
- SIM Card, MS Class mark
- GSM Band Allocations
- Application areas of microwave radio
Introduction to GPRS
- Circuit vs. Packet Switching
- Motivation for GPRS
- GPRS Terminals
- Coding Schemes
- GPRS Applications
GPRS & EDGE System Architecture
- GPRS/EDGE Network Structure
- Network Modes
- GPRS Backbone networks
- Coding Schemes
- Modulation Schemes – GMSK and 8-PSK
- Protocol Layers
- GPRS Radio Packet Segmentation
- GPRS Traffic Classes
Main GPRS Procedures
- Draw and explain the mobility management state model
- List and explain the most important GPRS procedures
Radio and MS-PCU Interfaces
- RLC/MAC and RF Layers
- Packet Logical Channel
- System Information
- Network Control
- Temporary Block Flow (TBF)
- Bit Map Allocation and Temporary Block Flow
- One Phase or Two Phase Access
- Packet Uplink Assignment
- RLC/MAC Block Structure
- Temporary Block Flow (TBF)
- Identifiers
- Interleaving
MS-SGNS Interface
- LLC Layer
- LLC Frame
- GPRS Ciphering Environment
- GMM Layer
- TLLI
- Mobility Management, GPRS Attach
- Cell Update in Packet Idle and Packet Active Mode
- RA Update (intra SGSN and inter SGSN)
- SNDCP Layer
- Combination of TLLI and NSAPI
- GPRS SMS Transfer
PCU-SGSN Interface (Gb)
- Protocol Stack at Gb Interface
- FR Network
- Network Service Sublayers
- Identifiers Managed by NS Layer
- Network Service Control Procedures
- BSSGP Identifiers
- Flow Control Procedures
The Tunnel Principle and GPRS Tunneling Protocol
- GPRS Tunneling Principle
- GTP Header
- GTP Signaling Messages
- Routing and Context Parameters
- PDP context activation and deactivation
GGSN –PDN Interface
- VPN Tunnel
- SGSN Actions on PDP Context Activation
- GGSN Actions on PDP Context Activation
- Transparent/Non Transparent Access to Intranet /ISP
GPRS Roaming
- Roaming Architecture
- Full Meshed Scenario vs. GRX Scenario
- Procedure for initiating GPRS Access while Roaming
- Quality aspects of GRX