GPRS Architecture
Global System for Mobile Communication (GSM) circuit-switch architecture does not support the GPRS packet-switch architecture. Thus, GPRS requires its own network architecture. Several networks and databases e.g. Mobile Station (MS), Base Station Subsystem (BSS), Home Location Register (HLR), Visitor Location Register (VLR) in existing GSM network are modified in GPRS network.
GPRS architecture introduces the following network nodes to GSM architecture.
Serving GPRS Support Node (SGSN)
Gateway GPRS Support Node (GGSN)
Mobile Station (MS)
Base Station System (BSS)
Home Location Register (HLR)
Visitor Location Register (VLR)
