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Concept
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packet switching
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Connection Mode
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| GSM w/o GPRS | end-to-end transmission
| GSM with GPRS
| link-by-link transmission
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Flexible Bit Rates
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from < 100 bit/s to over 100 kbit/s.
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Network Elements
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Serving GPRS Support Nodes SGSN
| Gateway GPRS Support Nodes GGSN
| GPRS backbone
| Point-to-multipoint Service Centre PTM SC
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Additional Facilities
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| GPRS-specific mobility management: the location of the MS is handled separately by the SGSN and by the MSC/VLR even if some cooperation exists network management capable of handling the GPRS-specific elements
| a new air interface for packet traffic
| new security features for the GPRS backbone and a new ciphering algorithm
| new MAP and GPRS-specific signalling
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