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Introduction

Historical Background

GSM

EDGE

The Evolution of the GSM Network

High Speed Circuit Switched Data (HSCSD)

General Packet Radio Service (GPRS)

System Overview

Traffic Cases

- IMSI attach

- GPRS Attach

-Combined GPRS/IMSI Attach

- PDP Context Activation and Deactivation

GPRS Air Interface

Logical Channels

PDCH Allocation

Dedicated PDCH

On-demand PDCH

Master PDCH

Cell Selection and Reselection

GPRS Support Node (GSN)

Interconnection Principles

GPRS IP Connectivity

The users IP communication

EDGE Summary and Key Points

WCDMA

UMTS

The Future

Final Thoughts

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GPRS Air Interface

The air interface (Um) is the logical link between the MS and the BSS. Figure 25 shows the GPRS Protocol Stack from the perspective of the BSS.

Figure 25 GPRS Protocol Stack
(Thomas, R, et al, 1999, France Telecom)

The Layers are described in Appendix 1.

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