24_gprs com (2)

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GPRS GPRS

MANISH YADAV MANISH YADAV

E.CE.C0838231407

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SEMINAR ON ´ GPRS ´

GPRS- General Packet Radio Service

provides a direct link into the Internetfrom a GSM phone

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INTRODUCTION TO GPRS

GPRS will undoubtedly speed up a handset'sInternet connection - but it remains to be

seen exactly how much speed can be achievedout of the system

. GPRS works by aggregating a number ofseparate data channels. This is possiblebecause data is being broken down into small'packets' which are re-assembled by thereceiving handset back into their originalformat.

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INTRODUCTION (cont«)

GPRS stands for General Packet Radio Service ,and is a relatively low cost technology thatoffers packet-based radio service and allows

data or information to be sent and receivedacross mobile telephone networks.

GPRS provides a permanent connection whereinformation can be sent or received

immediately as the need arises, subject toradio coverage.

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GPRS ARCHITECTURE

GPRS Subscriber Terminals

GPRS BSS

GPRS Networks Node

GPRS Mobility Management

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GPRS SUBSCIBER TERMINALS

New terminals are required because existingGSM phones do not handle the enhanced airinterface, nor do they have the ability to

packetize traffic directly.

A variety of terminals will exist, as described ina previous section, including a high-speed

version of current phones to support high-speed data access.

BACK

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GPRS BSSEach BSC will require the installation ofone or more PCUs and a software upgrade.The PCU provides a physical and logical

data interface out of the base stationsystem (BSS) for packet data traffic.

The BTS may also require a software

upgrade, but typically will not requirehardware enhancement.

BACK

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GPRS NETWORKS NODE

In the core network, the existing MSCs arebased upon circuit-switched central-officetechnology, and they cannot handle packet

traffic.Thus two new components, called GPRSSupport Nodes, are added:

Serving GPRS Support Node (SGSN)

Gateway GPRS Support Node (GGSN)

BACK

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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 totrack its location within each mobile network.

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WORKING OF GPRS

Each voice circuit in GSM transmits the speechon a secure 14kbps digital radio link betweenthe mobile phone and a nearby GSM transceiverstation.

The GPRS service joins together multiple

speech channels to provide higher bandwidthdata connections for GPRS data users. The radiobandwidth remains the same, it is just sharedbetween the voice users and the data users.

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WORKING-RADIO INTERFACE

Each GSM radio transceiver uses Time DivisionMultiplexing to deliver eight voice circuits on one radiochannel.

Each 14kbps channel may be shared by multiple

'connected' GPRS users.

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RADIO INTERFACE (cont«)

As a user's data requirements grow, they willuse more of the available capacity within thattimeslot

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GPRS MOBILE DEVICES

The key use for GPRS is to send and receivedata 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 atwhich point the user is 'attached' and an IPaddress is allocated.

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GPRS MOBILE DEVICES(cont«)

The three standard methods to connect your computer to GPRS mobile phone are:

1« Infrared

2« Data-cable

3« Bluetooth

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GPRS Roaming

In the short term don't expect to be able toroam to many countries with GPRS, manynetworks are still negotiating to set up roamingagreements. Technically there are two type ofGPRS Roaming

1« Home Network Roaming2« Local Network Roaming

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FEATURES OF GPRS

Key User Features of GPRS

Key Network Features of GPRS

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KEY USER FEATURES OF GPRS

Speed«

Immediacy«New and Better Applications«

Service Access«

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APPLICATIONS OF GPRS

E-Commerce

Banking

Financial TradingUnified Messaging

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ADVANTAGES OF GPRS

GPRS will enable a variety of new and unique services tothe mobile wireless subscriber. These mobileapplications contain several unique characteristics that

enhance the value to the customers.First among them is mobility³the ability to maintainconstant voice and data communications while on themove.

Second is immediacy, which allows subscribers toobtain connectivity when needed, regardless of locationand without a lengthy login session.

Finally, localization allows subscribers to obtaininformation relevant to their current location

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LIMITATIONS OF GPRS

Limited Cell Capacity for All Users

Speeds Much Lower in Reality

Support of GPRS Mobile Terminate byTerminals is Not Ensured

Suboptimal Modulation

Transit DelaysNo Store and Forward

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QUERIES, IF ANY ???

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THANK

YOU !!!

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