General Packet Radio Service

General Packet Radio Service(GPRS)

1. SEMINAR ON “ GPRS “
GPRS- General Packet Radio Service
provides a direct link into the Internet
from a GSM phone

2. INTRODUCTION TO GPRS
GPRS will undoubtedly speed up a handset's
Internet connection - but it remains to be
seen exactly how much speed can be achieved
out of the system
. GPRS works by aggregating a number of
separate data channels. This is possible
because data is being broken down into small
'packets' which are re-assembled by the
receiving handset back into their original
format.

3. INTRODUCTION (cont…)
GPRS stands for General Packet Radio Service ,
and is a relatively low cost technology that
offers packet-based radio service and allows
data or information to be sent and received
across mobile telephone networks.
GPRS provides a permanent connection where
information can be sent or received
immediately as the need arises, subject to
radio coverage.

4. GPRS ARCHITECTURE
GPRS Subscriber Terminals
GPRS BSS
GPRS Networks Node
GPRS Mobility Management

5. GPRS SUBSCIBER TERMINALS
New terminals are required because existing
GSM phones do not handle the enhanced air
interface, nor do they have the ability to
packetize traffic directly.
A variety of terminals will exist, as described in
a previous section, including a high-speed
version of current phones to support high-
speed data access.
BACK

6. GPRS BSS
Each BSC will require the installation of
one or more PCUs and a software upgrade.
The PCU provides a physical and logical
data interface out of the base station
system (BSS) for packet data traffic.
The BTS may also require a software
upgrade, but typically will not require
hardware enhancement.
BACK

7. GPRS NETWORKS NODE
In the core network, the existing MSCs are
based upon circuit-switched central-office
technology, and they cannot handle packet
traffic.
Thus two new components, called GPRS
Support Nodes, are added:
Serving GPRS Support Node (SGSN)
Gateway GPRS Support Node (GGSN)
BACK

8. GPRS MOBILITY MANAGEMENT
Mobility management within GPRS builds on the
mechanisms used in GSM networks.
As a MS moves from one area to another,
mobility management functions are used to
track its location within each mobile network.

9. WORKING OF GPRS
Each voice circuit in GSM transmits the speech
on a secure 14kbps digital radio link between the
mobile phone and a nearby GSM transceiver
station.
The GPRS service joins together multiple speech
channels to provide higher bandwidth data
connections for GPRS data users. The radio
bandwidth remains the same, it is just shared
between the voice users and the data users.

10. WORKING-RADIO INTERFACE
Each GSM radio transceiver uses Time Division
Multiplexing to deliver eight voice circuits on one radio
channel.
Maximum numbers are limited by many factors including
- operators radio license, interference with other nearby
GSM cells, cost of equipment, capacity of radio site
infrastructure etc.
Each 14kbps channel may be shared by multiple
'connected' GPRS users.

11. RADIO INTERFACE (cont…)
As a user's data requirements grow, they will
use more of the available capacity within that
timeslot

12. GPRS MOBILE DEVICES
The key use for GPRS is to send and receive
data to a computer application such as Email,
web browsing or even telemetry.
To use GPRS the service is 'dialed' in a
similar manner to a standard data call at
which point the user is 'attached' and an IP
address is allocated.

13. GPRS MOBILE DEVICES(cont…)
The three standard methods to connect
your computer to GPRS mobile phone are:
1… Infrared
2… Data-cable
3… Bluetooth

14. GPRS Roaming
In the short term don't expect to be able to
roam to many countries with GPRS, many
networks are still negotiating to set up roaming
agreements. Technically there are two type of
GPRS Roaming
1… Home Network Roaming
2… Local Network Roaming

15. GPRS SECURITY
The radio interface is considered to be
relatively secure being controlled by the GSM
network's security - (SIM card + HLR).
Security issues arise when data needs to leave
the GPRS network to be delivered to either
the Internet or a company LAN.
Internet connectivity is the cheapest and
most common - and here you can take charge
of security by encrypting sensitive data.

16. FEATURES OF GPRS
Key User Features of GPRS
Key Network Features of GPRS

17. KEY USER FEATURES OF GPRS
Speed…
Immediacy…
New and Better Applications…
Service Access…

18. KEY NETWORK FEATURES OF
GPRS
Packet Switching…
Spectrum Efficiency…
Internet Aware…
Supports TDMA and GSM…

19. APPLICATIONS OF GPRS
E-Commerce
Banking
Financial Trading
Unified Messaging

20. GENERAL APPLICATIONS OF
GPRS
Communications—E-mail and fax;
Intranet/Internet access
Value-added services (VAS)—Information services;
games
E-commerce—Retail; ticket purchasing; banking;
financial trading
Location-based applications—Navigation; traffic
conditions; airline/rail schedules; location finder
Vertical applications—Freight delivery; fleet
management; sales-force automation
Advertising

21. ADVANTAGES OF GPRS
GPRS will enable a variety of new and unique services to
the mobile wireless subscriber. These mobile
applications contain several unique characteristics that
enhance the value to the customers.
First among them is mobility—the ability to maintain
constant voice and data communications while on the
move.
Second is immediacy, which allows subscribers to
obtain connectivity when needed, regardless of location
and without a lengthy login session.
Finally, localization allows subscribers to obtain
information relevant to their current location

22. LIMITATIONS OF GPRS
Limited Cell Capacity for All Users
Speeds Much Lower in Reality
Support of GPRS Mobile Terminate by
Terminals is Not Ensured
Suboptimal Modulation
Transit Delays
No Store and Forward

23. CONCLUSION
From this we can conclude that E-
Commerce,Banking ,Financial Trading,
Unified Messaging are the fields where
GPRS is very much advantageous.

But the areas like limited cell
capacity,lower speeds,and other certain
limitations are the areas where it needs
to improve.

24. CONCLUSION (cont…)
 GPRS is classified as a 2.5G (or 2G Plus)
technology because it builds upon existing
network infrastructure
 In order to compete with 3G, EDGE must
offer links running at 384 Kbit/s and
originally this equated to running GPRS
three times faster. However, because
GPRS has proved much slower than
expected, it now needs to be seven times
faster.

25. QUERIES, IF ANY ???

26. THANK YOU !!!

27. SEMINAR ON GPRS
PREPARED BY:
SANDEEP K. PARMAR
GUIDED BY:
Miss JAGRUTI GOSWAMI