Transcript GPRS - Cloud 479

GPRS
GPRS
What’s in this slide?
Introduction to GPRS.
History
GPRS Service.
GPRS Speeds.
GPRS Mobile Devices.
Services of GPRS.
GPRS in practice.
Introduction to GPRS
GPRS is a service of GSM mobiles.
GPRS-GENERAL PACKET RADIO
SERVICE provides direct link to the internet
from GSM phones.
 Basically it is used for data trancfer.
GPRS is described as”2.5G”.
GPRS is packet switched.
HISTORY
Throughout
1999-2000
Network operators place trial and commercial contracts for GPRS
infrastructure.
Summer of 2000
First trial GPRS services become available.
Typical single user throughput is likely to be 28 kbps.
Start of 2001
Basic GPRS capable terminals begin to be available in commercial
quantities.
Throughout 2001
Network operators launch GPRS services commercially an roll out
GPRS.
2001/2002
New GPRS specific applications, higher bitrates, greater network
capacity solutions, more capable terminals become available,
fueling GPRS usage.
2002
Typical single user throughput is likely to be 112 kbps.
GPRS Phase 2/EDGE begins to emerge in practice.
2002/2003
3GSM arrives commercially.
GPRS Service
In GPRS data is billed per kilobytes of
information transceived.
Through GPRS only those files can be
accessed which are written in XHTML.
The main benefit for users of GPRS is
the ‘always on’ characteristic.
GPRS Speed
The theoretical limit for packet switched data is
approx 170 kbit/sec.
Realistic bit rate is 30-70 kbit/sec.
60
50
40
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3-D Column 3
30
20
10
0
GPRS(4+1)
CSD
HSCSD
GPRS Speed (cont.)
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GPRS (4+1) 57.6 kbit/s
14.4 kbit/s (class 8& 10)
GPRS (3+2) 43.2 kbit/s
28.8 kbit/s (class 10)
CSD
9.6 kbit/s
9.6 kbit/s
HSCSD
28.8 kbit/s
14.4 kbit/s (2+1)
HSCSD
43.2 kbit/s
14.4 kbit/s (3+1)
 A change to the radio part of GPRS called
EDGE allows higher bit rates of between 20
and 200 kbit/s. The maximum data rates are
achieved only by allocation of more than one
time slot in the TDMA frame.
GPRS MOBILE DEVICES
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.
The key use for GPRS is to send and
receive data to a computer application
such as Email, web browsing or even
telemetry.
GPRS MOBILE DEVICES (cont…)
The three standard methods to connect
your computer to GPRS mobile phone
are:
1… Infrared
2… Data-cable
3… Bluetooth
Services of GPRS
GPRS provides services like
Point-to-point
Point-to-multipoint
SMS
Anonymous services.
GPRS in Practice
Telephone operators prices GPRS
relatively cheaply compared to csd.
 Typical rates vary wildly, ranging from
Euro 1 to Euro 20 per megabyte .
In the US T-mobile offers US$20 per
month unlimited GPRS.
Orange in UK offers 1 gigabyte package
for 88 per month.
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.
FEATURES OF GPRS
Key User Features of GPRS
Key Network Features of GPRS
KEY USER FEATURES OF GPRS
Speed…
Immediacy…
New and Better Applications…
Service Access…
KEY NETWORK FEATURES OF
GPRS
Packet Switching…
Spectrum Efficiency…
Internet Aware…
Supports TDMA and GSM…
APPLICATIONS OF GPRS
E-Commerce
Banking
Financial Trading
Unified Messaging
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
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
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
CONCLUSION:From this we conclude that the
future of GPRS is very bright because it is flexible to
new functions such as more capacity, more users ,new
radio networks.