GPRS protocol is a packet-switch protocol; define for web applications in GSM network. In other words Internet on GSM network is standardized as GPRS network. GPRS has digital structure and this structure based on Time Division Multiple Access (TDMA) technique. One TDMA frame has 8 time slots (TSs). These TSs can be allocated to users, and single TS can be shared by several active users for uplink and downlink purposes. Different coding schemes are used to enhance data rate from 9Kbps to 150 Kbps per user, and it takes 0.5 to 1 second. Security features in GPRS is provided by GSM network.
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)
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)
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