GPRS Architecture and its components are covered extensively. The slides give a little information about gprs and also gets into deeper explanation of its architecture.

1. GPRS
ARCHITECTURE
Deekshitha.S

2. GPRS ( General Packet Radio Services )
● General Packet Radio Services (GPRS) is a packet-based wireless communication service that
promises data rates from 56 up to 114 Kbps and continuous connection to the Internet for mobile
phone and computer users.
● The higher data rates allow users to take part in video conferences and interact with multimedia
Web sites and similar applications using mobile handheld devices as well as notebook computers.
● GPRS is based on Global System for Mobile (GSM) communication and complements existing
services such as circuit-switched cellular phone connections and the Short Message Service (SMS).

3. DATABASES05
All the databases in the network will require software upgrades to
handle the new call models and functions introduced by GPRS.
GPRS SUPPORT NODES04
The deployment of GPRS requires the installation of serving GPRS
support node SGSN and gateway GPRS support node.
BASE STATION CONTROLLER03
The Base Station Controller BSC requires a software upgrade and
the installation of new hardware called the packet control unit PCU.
BASE TRANSCEIVER STATION02 A software upgrade is required in the existing Base Transceiver
Station.
MOBILE STATION01
New Mobile Station is required to access GPRS services. These new
terminals will be backward compatible with GSM for voice calls.
GPRS MODIFICATIONS

4. GPRS ARCHITECTURE

6. MAIN ELEMENTS
GPRS SUPPORT
NODES
Gateway GPRS
Support Node
GGSN
Serving GPRS
Support Node
SGSN
GPRS MOBILE
STATIONS
Mobile Station
is required to
access GPRS
services
When either voice
or data traffic is
originated at the
subscriber
mobile, it is
transported over
the air interface
to the BTS
GPRS BASE STATION
SUBSYSTEMS ROUTINGAERA
Routing area is
similar to
Location Area
in GSM,except
that it
generally
contains fewer
cells
INTERNAL
BACKBONE
The internal
backbone is an
IP based
network used
to carry
packets
between
different GSNs

7. GPRS
SUPPORT
NODES
Serving GPRS Support
Node (SGSN)
Gateway GPRS Support
Node (CGSN)
GPRS SUPPORT NODES

8. SGSN( Serving GPRS Support Node )
● Routing the packet switched data to and from the mobile station.
● Mobility management.
● Data management.
● Authentication and charging for cells.
● Stores the location information of the user.

9. GGSN ( Gateway SPRS Support Node )
● Provides a gateway between GPRS and PDN (Packet Data Networks).
● Converts data from SGSN to PDP format (Packet Data Protocol).
● Stores the current SGSN address.
● Stores the location of user in it’s location register.
● Performs authentication and charging functions.

10. GPRS SUBSYSTEMS
01
02
03
04
BASE STATION SYSTEM
(BSS)
NETWORK SUB-SYSTEM
(NSS)
GATEWAY SUB-SYSTEM
(GSS)
RADIO STATION SUB-
SYSTEM
(RSS)

11. BASE STATION SYSTEM (BSS)
● BSS needs enhancement to
recognize and send packet data
● BSS includes BTS (Base
Transceiver Station) and MS
(Mobile Station)
● It consists of a number of SGSN
(Serving GPRS Support Node)
● Also consists of a number of MSC
(Mobile-Service Switching Center)
● Helps in authentication, operation
and maintenance of subsystems
NETWORK SUB-SYSTEM (NSS)

12. RADIO STATION SUB-SYSTEM (RSS)
● Consists of a number of MS
(Mobile Station), BTS (Base
Transceiver Station) and BSC (Base
Station Controller)
● Stores a CKSN (Cipher Key
Sequence Number - a logical
identity)
● Consists of SGSN (Serving GPRS
Support Node) and GGSN (Gateway
GPRS Support Node)
● Provides connections to other
networks and PDA (Public Data
Network)
GATEWAY SUB-SYSTEM (GSS)

13. GPRS PERFORMANCE CATEGORIES
They are split into three basic categories according to their capabilities in terms of the ability to connect
to GSM and GPRS facilities:
● Class A: - This class describes mobile phones that can be connected to both GPRS and GSM
services at the same time.
● Class B: - These mobiles can be attached to both GPRS and GSM services but they can be used on
only one service at a time. A Class B mobile can make or receive a voice call, or send and or
receive a SMS message during a GPRS connection. During voice calls or texting the GPRS service
is suspended but it is re-established when the voice call or SMS session is complete.
● Class C: - This classification covers phones that can be attached to either GPRS or GSM services
but user needs to switch manually between the two different types.

14. CONCLUSION
● GPRS provides efficient access to Packet Data Networks
● Multislot operation in GPRS leads to efficient channel utilization
● GPRS is more effective for long data packet transmission than short ones.

15. Thank You