1. Nokia 3G Serving GPRS Support Node

2. Evolution from GSM to GPRS
MSC/VLR
PSTN
Network
SS7
BTS
BSC
Operator Services
HLR/AuC/EIR, SMSC
HLR/AuC/EIR/SMSC
Border
Gateway (BG)
Serving GPRS
Support Node
(SGSN)
Gateway GPRS
Support Node (GGSN)/ CheckPoint Firewall-1 / VPN
Charging
Gateway (CG)
Local
Area
Network
Router/Firewall
Corporate Customer
Mobile ISP
Data
network
(Internet)
GPRS
backbone
(IP based)
Inter-PLMN
Customer
Care and Billing
Network Management

3. Evolution from GPRS to 3G
RNC
BTS
PSTN
Network
3G MSC/VLR
3G HLR/AuC/EIR, SMSC Um
SS7
Network
Operator Services
Serving GPRS
Support Node
(3G SGSN)
Customer
Care and Billing
Network Management
Mobile ISP
Charging
Gateway (CG)
GPRS
backbone
network
(IP based)
Border
Gateway (BG)
Router/Firewall
Gateway GPRS
Support Node (GGSN)/ CheckPoint Firewall-1 / VPN
Inter-PLMN
network
Data
network
(Internet)
Corporate Customer
Router/Firewall
Local
Area
Network

4. The Nokia 3G SGSN
Developed and optimised specifically for 3G mobile networks, principally UMTS
Robust performance for the demands of high throughput and real-time 3G services
Connects the 3G radio access network (RAN) with the 3G packet core network
Supervises the usage of PLMN services and radio network resources
Future-proof technology

5. Essential to 3G mobile packet core
The Nokia 3G SGSN performs crucial tasks in the 3G network
SMS delivery
Mobility
Management
Charging data collection and generation
Routing (best-route selection)
Interworking with 2G
Session
Management
Traffic statistics collection