GPRS is a packet-based mobile data service that allows users to send and receive data, including via mobile browsers, across mobile networks. It requires a GPRS-enabled mobile device and subscription. GPRS uses protocols like IP and PPP and provides higher speeds than previous GSM networks, allowing new mobile applications. Key network components that support GPRS include the SGSN, GGSN, MSC, and BSC. Common applications include web browsing, chat, and file transfers. Security, cost savings, and easier application development are benefits of GPRS compared to prior circuit-switched networks.

1. WELCOME TO

2. General Packet Radio System
(GPRS)
PRESENTED
KINGSHUK BANERJEE BY-
SRIMOYEE MUKHOPADHYAY
1. KINGSHUK BANERJEE (35)
2.SRIMOYEE MUKHOPADHYAY (24)
3. AVISHEK PAL (02)
4.JAYITA MAITI (12)

3. WHAT IS GPRS?
GPRS (General Packet Radio Service) is a
packet based communication service for
mobile devices that allows data to be sent and
received across a mobile telephone network.

4. TO USE GPRS USERS SPECIFICALLY
NEED:
1. Mobile phone or terminal that supports GPRS.
2. Subscription to a mobile operator that supports GPRS.
3. Use of GPRS must be enabled for that user.
4. GPRS is designed to make the internet fully available to the user.
5.

5. PROTOCOLS SUPPORTED
GPRS supports the following protocols:
INTERNET PROTOCOL(IP). In practice, built-in mobile
browsers generally use IPv4.
POINT TO POINT PROTOCOL(PPP). In this mode PPP
is often not supported by the mobile phone
operator,but if the mobile is used as a modem to the
connected computer, PPP is used to tunnel IP to the
phone.
When TCP/IP is used, each phone can have one or
more IP addrsses allocated. GPRS will store and
forward the IP packets to the phone.

6. SPEED OF GPRS
The upload and download speeds that can be achieved in
GPRS depend on a number of
factors such as:
The number of TDMA time slots assigned by the
operator.
 The channel encoding used.
Using the CS-4 it is possible to achieve a user speed of
20.0 kbit/s per time slot.
CS-1 can achieve a user speed of only 8.0 kbit/s per time
slot.

7. HOW TO CONNECT INTERNET?

8. KEY FEATURES OF GPRS
Speed:-
GPRS is packet switched. Higher connection speeds are
attainable at around 56–118 kbps, a vast improvement
on circuit switched networks of 9.6 kbps .
Always on connectivity:-
GPRS is an always-on service.
Spectrum Efficiency:-
Large number of GPRS users can share the same
bandwidth and be served from a single cell.

9. KEY FEATURES OF GPRS
 New and Better applications:-
Users are able to explore the Internet or their own
corporate networks more efficiently than they
could when using GSM.
GSM operator Costs:-
GPRS allows GSM providers to add value to
their business at relatively small costs.

10. HARDWARE
Devices supporting GPRS are divided into three classes
Class A
Can be connected to GPRS service and GSM service (voice, SMS), using
both at the same time. Such devices are known to be available today.
Class B
Can be connected to GPRS service and GSM service (voice, SMS), but
using only one or the other at a given time. During GSM service (voice
call or SMS), GPRS service is suspended, and then resumed
automatically after the GSM service (voice call or SMS) has concluded.
Most GPRS mobile devices are Class B.
Class C
Are connected to either GPRS service or GSM service (voice, SMS).
Must be switched manually between one or the other service.

11. Difference Between GSM And
GPRS
GSM GPRS
Circuit Switched Architecture Packet Switched Architecture
Point to point service Multipoint service
Inefficient use of resources Efficient use of resources
Lower bit rate(14.4KB/S) Higher bit rate(170KB/S)
Reserved bandwidth Shared bandwidth
Fixed access time Variable access time
Time based billing Traffic based billing

12. HOW GPRS WORK?
 When a user turns on a GPRS device,
typically it will automatically scan for a local
GPRS channel.
 If an appropriate channel is detected, the
device will attempt to attach to the network.
 The SGSN receives the attach request,
fetches subscriber profile information from
the subscriber’s HLR node, and
authenticates the user.
 Ciphering may be established at this point.

14. Sending and Receiving Packets
 When the mobile user sends data, the SGSN routes
the packets to the appropriate GGSN.
 The GGSN then routes the data according to the
current "context" established for the session.
 Conversely, packets destined for the user are routed
to the GGSN associated with the user's IP address.
 The GGSN checks the received packets against the
current context, identifies the SGSN that is serving the
user, and routes the traffic accordingly.
 The SGSN then forwards the packets to the BSS where
the subscriber is located.

16.  MSC(MOBILE SWITCHING CENTRE)-SWITCHING CENTRE
WHICH COORDINATES THE ROUTING OF CALLS IN A LARGE SERVICE
AREA.MSC CONNECTS THE CELLULAR BASE STATIONS AND THE
MOBILES TO THE PSTN.
 BSC(BASE STATION CONTROLLER)-A base station
subsystem (BSS) which typically includes one or more base
station controllers and a plurality of base stations, provides
all of the radio-related functions
 PSTN(PUBLIC SWITCHED TELEPHONE NETWORK)- IT
UTILISES STANDARDS CREATED BY ITU-T. THIS STANDARDS ALLOWS
DIFFERENT NETWORK IN DIFFERENT COUNTRIES TO INTERCONNECT
SEAMLESSLY.

17. GGSN(GATE GPRS SUPPORT NODE)- IT IS USED
AS INTERFACES TO EXTERNAL IP NETWORKS SUCH AS PUBLIC
INTERNET.OTHER FUNCTION INCLUDES SUBSCIBES SCREENING AND
ADDRESS MAPPING.IT MAINTAINS ROUTING INFORMATION.
CHARGING GATEWAY- MAIN FUNCTION IS COLLECTION
OF GPRS DATA RECORDS FROM GPRS NODES,INTERMEDIATE DATA
RECORD STORAGE,BUFFERING AND TRANSFER OF DATA RECORDS TO
THE MEDIATION OR BILLING SYSTEM.
SGSN(SERVING GPRS SUPPORT NODE)-IT
SENDS QUERIES TO HOME LOCATION REGISTER (HLR) TO OBTAIN
PROFILE DATA OF GPRS SUBSCRIBER.

18. APPLICATIONS
CHAT
INFORMATION SERVICES AS TEXT OR GRAPHICS
STILL IMAGES
MOVING IMAGES
WEB BROWSING
AUDIO REPORTS
DOCUMENT SHARING
JOB DISPATCH
CORPORATE MAIL
LAN APPLICATIONS
VEHICLE POSITIONING
FILE TRANSFER

19. CURRENT TECHNOLOGY

20. GPRS CONNECTING TOOLS

21. SECURITY ISSUES
 IDENTITY CONFIDENTIALITY
 IDENTITY AUTHENTICITY
 USER AND SIGNALING DATA CONFIDENTIALITY
 THE ALGORITHMS

22. CONCLUSION
1. In theory, GPRS packet-based services cost users less than
circuit-switched services since communication channels are being
used on a shared-use, as-packets-are-needed basis rather than
dedicated to only one user at a time.
2. It is also easier to make applications available to mobile
users because the faster data rate means that middleware
currently needed to adapt applications to the slower speed
of wireless systems are no longer be needed.
3. GPRS also complements Bluetooth, a standard for replacing
wired connections between devices with wireless radio connec-
tions. In addition to the Internet Protocol (IP), GPRS supports X.25,
a packet-based protocol that is used mainly in Europe.

23. BIBLIOGRAPHY
www.en.wikipedia.org/wiki/wimax
www.enchantedlearning.com
www.science.howstuffworks.com/wimax
http://www.comsoc.org/pubs/surveys/3q99i
ssue/bettstetter.html
http://www.wsdmag.com/2000/aug2200/38-
45.html