Article | REF: TE7364 V1

Cellular networks - From GSM to GPRS

Author: Jean CELLMER

Publication date: May 10, 2004 | Lire en français

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2. Architecture

Figure 1 shows the architecture of a GSM-GPRS network [5] . As GSM was not originally designed to operate in packet mode, two new network elements were introduced: GGSN and SGSN.

2.1 GGSN

GGSN stands for Gateway GPRS Support Node. It is the interface between external networks, whether packet data networks or other mobile communications networks, and the GPRS network to which it belongs. It analyzes the PDP (Packet Data Protocol) addresses of incoming packets, and routes them via the SGSN.

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