How does GPRS architecture differ from GSM?

How does GPRS architecture differ from GSM?

The following table depicts the architectural differences between GPRS and GSM
Mobile StationNew mobile station is needed for accessing GPRS services. They are backward compatible with GSM for voice calls
Base Transceiver StationSoftware upgrade is needed in the existing BTS
Base Station ControllerSoftware upgrade and new hardware, Packet Control Unit are needed for GPRS.
GPRS Support NodesInstallation of new core network elements, known as serving GPRS support node, and gateway GPRS support node are needed to deploy GPRS
DatabasesRequires software upgrade to handle new models and functions to handle databases involved in the network
Differentiate between GSM and GPRS.
The differences between GSM and GPRS are depicted in the following table.....
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