Copy (2) of GPRS2

8/7/2019 Copy (2) of GPRS2

http://slidepdf.com/reader/full/copy-2-of-gprs2 1/14

Seminar onSeminar on

´́G.P.R.S.G.P.R.S.µµ

Presented byName ² Debajyoti saha

Dept -Eletrical Engg.Roll No . 08119016016

8/7/2019 Copy (2) of GPRS2


Contents

� 1. Wireless Communication

� 2. Introduction To GPRS

� 3.Data Transfer Speed

� 4. Working of GPRS� 5.GPRS capabilaty Classes

� 6.Bacic Charactertics of GPRS

� 7.Apllication of GPRS

� 8. Limitation of GPRS� 9. Security

� 10. GPRS Today and Tommorow

� 11 Biblography

8/7/2019 Copy (2) of GPRS2


GENERAL PACKET RADIOGENERAL PACKET RADIO

SERVICE (GPRS)SERVICE (GPRS)�� WIRELSS COMMUNICATIONWIRELSS COMMUNICATION:: wirelesswireless

communication has allowed manycommunication has allowed many

people around the world to live their people around the world to live their

lives and conduct business in ways thatlives and conduct business in ways that

were never before possible. Millions of were never before possible. Millions of

cellular subscribers have becomecellular subscribers have becomeaccustomed to always having aaccustomed to always having a

telephone with them wherever they gotelephone with them wherever they go

8/7/2019 Copy (2) of GPRS2


INTRODUCTION TOG

PRSINTRODUCTION TOG

PRSGPRS is a new nonGPRS is a new non--voice, value added, highvoice, value added, high--speed,speed,

packetpacket--switching technology, for GSM (Globalswitching technology, for GSM (Global

System for Mobile Communications) networks. ItSystem for Mobile Communications) networks. Itmakes sending and receiving small bursts of data,makes sending and receiving small bursts of data,

such as email and web browsing, as well as largesuch as email and web browsing, as well as large

volumes of data over a mobile telephone networkvolumes of data over a mobile telephone network

possible.possible.ENHANCEMENT OF GSM: The GPRS service can beENHANCEMENT OF GSM: The GPRS service can be

said to be an enhancement of the GSMsaid to be an enhancement of the GSM services.Itservices.It

has a tremendous transmission rate which makes ahas a tremendous transmission rate which makes a

good impact in the most of the existing services.good impact in the most of the existing services.

8/7/2019 Copy (2) of GPRS2


DATA TRANSFER SPEED:DATA TRANSFER SPEED:

56 K Dial56 K Dial--Up(kbps)Up(kbps)5656

GSM(kbps)GSM(kbps) 9.69.6

HSCSDHSCSD (maximum(maximum

speed)(kbps)speed)(kbps)

57.657.6

GPRSGPRS (maximum(maximum


171.2171.2

GPRSGPRS (realistic(realistic


43 TO 5643 TO 56

contd.

8/7/2019 Copy (2) of GPRS2


WORKING OF GPRS:WORKING OF GPRS:

�� GPRS introduces the following two new major GPRS introduces the following two new major network elements:network elements:

�� SGSNSGSN²²Sends data to and receives data fromSends data to and receives data from

mobile stations, and maintains information aboutmobile stations, and maintains information aboutthe location of a mobile station (MS). The SGSNthe location of a mobile station (MS). The SGSNcommunicates between the MS and the GGSN.communicates between the MS and the GGSN.SGSN support is available from Cisco partners or SGSN support is available from Cisco partners or

other vendors.other vendors.�� GGSNGGSN²²A wireless gateway that allows mobileA wireless gateway that allows mobilecell phone users to access the public datacell phone users to access the public datanetwork (PDN) or specified private IP networks.network (PDN) or specified private IP networks.The GGSN function is implemented on the CiscoThe GGSN function is implemented on the CiscoSystems' router.Systems' router.

8/7/2019 Copy (2) of GPRS2


The GPRS Capability Classes:The GPRS Capability Classes:

�� Class AClass A�� Can be connected to GPRS service and GSM serviceCan be connected to GPRS service and GSM service

(voice, SMS), using both at the same time. No such(voice, SMS), using both at the same time. No suchdevices are known to be available today.devices are known to be available today.

�� Class BClass B

�� Can be connected to GPRS service and GSM serviceCan be connected to GPRS service and GSM service(voice, SMS), but using only one or the other at a given(voice, SMS), but using only one or the other at a giventime. During GSM service (voice call or SMS), GPRStime. During GSM service (voice call or SMS), GPRSservice is suspended, and then resumed automaticallyservice is suspended, and then resumed automaticallyafter the GSM service (voice call or SMS) has concluded.after the GSM service (voice call or SMS) has concluded.Most GPRS mobile devices are Class B.Most GPRS mobile devices are Class B.

�� Class CClass C

�� Are connected to either GPRS service or GSM serviceAre connected to either GPRS service or GSM service(voice, SMS). Must be switched manually between one or (voice, SMS). Must be switched manually between one or

the other service.the other service.

8/7/2019 Copy (2) of GPRS2


Basic characteristics of GPRS:Basic characteristics of GPRS:--

Data rate:Data rate: Maximum of 171.2 kbpsMaximum of 171.2 kbps

Channel codingChannel coding

Outer block coding Outer block coding Inner Convolutional coding Inner Convolutional coding

Interleaving scheme for error burstsInterleaving scheme for error bursts

ModulationModulation

GaussianMinimum Shift Keying GMSK GaussianMinimum Shift Keying GMSK

Multiple AccessMultiple AccessCombination of TDMA & FDMACombination of TDMA & FDMA

Transmit Frequency bandsTransmit Frequency bands

Mobile stationMobile stationBase stationUplink Base stationUplink

Downlink Downlink Reverse ch. 890Reverse ch. 890 -- 915 MHz915 MHzForward ch. 935Forward ch. 935 -- 960 MHz 960 MHz Duplex seperationDuplex seperation 45 MHz 45 MHz

R F carrier spacingR F carrier spacing 200 k Hz 200 k Hz Extra nodes:Extra nodes:

Gateway GPRS Support Node (GGSN) andGateway GPRS Support Node (GGSN) andServing GPRS Support Node (SGSN)Serving GPRS Support Node (SGSN)

8/7/2019 Copy (2) of GPRS2


APPLICATIONS OF GPRS:APPLICATIONS OF GPRS:

�� GPRS provides very high speed of data transmissionGPRS provides very high speed of data transmissionover the other existing technologiesover the other existing technologies

�� GPRS is allowing the network operators to utilize theGPRS is allowing the network operators to utilize the

radio resources to the maximum in a dynamic andradio resources to the maximum in a dynamic andflexible way.flexible way.

�� GPRS is improving the peak time capacity of the GSMGPRS is improving the peak time capacity of the GSMnetworksnetworks

�� GPRS supports multimedia applications such asGPRS supports multimedia applications such asdocument sharingdocument sharing

�� GPRS supports all advanced Internet based servicesGPRS supports all advanced Internet based servicesand applications like color web browsing, email, chatand applications like color web browsing, email, chat

etc.etc.

8/7/2019 Copy (2) of GPRS2


LIMITATIONS OF GPRS:LIMITATIONS OF GPRS:

�� SPEED MUCH LOWER THAN REALITYSPEED MUCH LOWER THAN REALITY

�� LIMITED CELL CAPACITY FOR ALLLIMITED CELL CAPACITY FOR ALL

USERSUSERS�� SUPPORT OF GPRS MOBILESUPPORT OF GPRS MOBILE

TERMINATE BY TERMINALS IS NOTTERMINATE BY TERMINALS IS NOT

ENSUREDENSURED

�� SUBOPTIONAL MODULATIONSUBOPTIONAL MODULATION

�� TRANSIT DELAYSTRANSIT DELAYS

8/7/2019 Copy (2) of GPRS2


SECURITY:SECURITY:

GPRS security functionality isGPRS security functionality is

equivalent to the existing GSMequivalent to the existing GSM

security. The SGSN performssecurity. The SGSN performs

authentication and cipher settingauthentication and cipher setting

procedures based on the sameprocedures based on the same

algorithms, keys, and criteria as inalgorithms, keys, and criteria as inexisting GSM. GPRS uses a cipheringexisting GSM. GPRS uses a ciphering

algorithm optimised for packet dataalgorithm optimised for packet data

transmissiontransmission

8/7/2019 Copy (2) of GPRS2


GPRS TODAY ANDGPRS TODAY AND

TOMORROWTOMORROW�� . 1 . In 2001 GPRS phase 1 is launched.. 1 . In 2001 GPRS phase 1 is launched.

�� 2. After Some year GPRS phase 2 is launched.2. After Some year GPRS phase 2 is launched.

That is called EDGE.That is called EDGE.�� 3. Now a dayes we use 3G.3. Now a dayes we use 3G.

�� 4.Thinking About 4G already started4.Thinking About 4G already started

8/7/2019 Copy (2) of GPRS2


BIBLOGRPHY BIBLOGRPHY

� www.scribd.com

� www.google.com

8/7/2019 Copy (2) of GPRS2


Copy (2) of GPRS2

Documents

Transcript of Copy (2) of GPRS2