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Network Infrastructure

The GPRS Network Structure

For GPRS, the existing network switching infrastructure cannot be reused, an entirely new core network is required. However, the base station subsystem or BSS can be used for both circuit-switched services and GPRS packet-switched services. Please note that the BSS needs to be upgraded with the so-called Packet Control Unit or PCU.
The new network elements within the GPRS core network are the Serving GPRS Support Node or SGSN, the Gateway GPRS Support Node or GGSN, the Border Gateway or BG and the Charging Gateway or CG. Please click on the network elements to obtain more information.