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Historical Background

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

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TRAFFIC CASE
Combined GPRS/IMSI Attach

In a combined GPRS/IMSI attach, both of the previous procedures are carried out simultaneously, shown in Figure 24.

Figure 24 Combined GPRS/IMSI attach