mobile network & 3g

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&M ob ile N e tw o rk

3 G


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Version 1.1May 2007

OMC

Home LocationRegister

AuC

Equipment ID

Network Management

Center

BTS

BTS

BTS

ME

ME

ME

Subscribe r

IdentityModule

Subscribe r

IdentityModule

Subscribe r

IdentityModule

Base stationcontroller

PSTN

Mobileswitchin g center

Data communication

network

=BTS Base Transceiver Station=AuC Authentication Center=OMC Operation and Maintenance Center=PSTN Public Switched Telephone Network

=ME Mobile Equipment Visitor LocationRegister

( )GSM Global Systems for Mobile Communications


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Network Switching Subsystem

l The backbone of a GSM network is an ordinary telephone network with some added capabilities

l ( )Mobile Switching Center MSC An ISDN exchange with additional capabilities to support mobile

communicationsl ( )Visitor Location Register VLR

,A database part of the MSC Contains the location of the active Mobile Stations

l ( )Gateway Mobile Switching Center GMSC Links the system to PSTN and other operatorsl ( )Home Location Register HLR

,Contains subscriber information including authentication information in( )Authentication Center AuC

l ( )Equipment Identity Register EIR( )International Mobile Station Equipment Identity IMEI codes

. .for e g blacklisting stolen phones


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Home Location Register

l One database per operatorl Contains all the permanent subscriber information

l ( )MSISDN Mobile Subscriber ISDN number is the telephone number of the subscriber

l IMSI code is used to link the MSISDN number to the subscriber's( )SIM Subscriber Identity Module

l ( )International Mobile Subscriber Identity IMSI is the 15 digit code used to identify the subscriber

It incorporates a country and operator codel Charging informationl Services available to the customer

l ,Also the subscriber's present Location Area Code which refers to,the MSC which can connect to the MS


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Mobile System

MS is the user's handset and has two partsl Mobile Equipmentl Radio equipment

l User interfacel Processing capability and memory required for

various tasks Call signaling

Encryption

SMS messagesl Equipment IMEI numberl Subscriber Identity Module


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Subscriber Identity Module

l A small smart cardl Encryption codes needed to identify the subscriberl Subscriber IMSI numberl ( )Subscriber's own information telephone directoryl ( .)Third party applications banking etcl Can also be used in other systems besides GSM

l . .e g some WLAN access points accept SIM based user

authentication


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ROAMING IS THE CONCEPT WHICHENABLES A MOBILE SUBSCRIBER TO ROAMIN OTHER NETWORKSRETAINING THE SAME MOBILE NUMBER

Types of Roaming Ty pes of Roaming

1.1. National Roaming National Roaming 2.2. International RoamingInternational Roaming3.3.Regional RoamingRegional Roaming4.

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ROAMING


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SMSC

Network Management

System

Billing SystemProvisioning

Mobile StationShort MessageEntity (SME)

OtherServices/Application

s

Non-MS External

Short MessageEntity (ESME)Likeall short codes SPs

GSM Network

SMSC Architecture in a GSM Network


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GPRS : General Packet Radio ServiceGPRS : General Packet Radio Service(Access Internet/Intranet, Email Access over phone)(Access Internet/Intranet, Email Access over phone)MMS : Multi Media Messaging ServiceMMS : Multi Media Messaging Service(send pictures/text /voice at one go thru MMS(send pictures/text /voice at one go thru MMShandset)handset)

1.1. SGSN : Serving GPRS Support NodeSGSN : Serving GPRS Support Node2.2. GGSN : Gateway GPRS Support NodeGGSN : Gateway GPRS Support Node

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&GPRS MMS


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3 G and its Services


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Newspectrum

Exis t ingspectrum

G volved 2G 3G

.14 4 kbps 64 115 kbps . 0 384 2 mbps 115 384 kbps

-MT 2000 apa ble Syst ems

GSM GPRS EDGE

3G

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Evolution Path for 3G


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Evolution paths All technologies


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WCDMA GSMCarrier Bandwidth/Spacing 5 MHz 200 KHz

Frequency Reuse Factor 1 1-18 (Variable)

Power Control Frequency 1500 Hz 2 Hz or Lower

Frequency Diversity 5 MHz gives multipath diversitywith RAKE receivers

Frequency Hopping

Duplex Method FDD or TDD FDD

Spectrum For FDD : 1920-1980 (Uplink)

2110-2170 (Downlink)For TDD:1900-1920 MHz (Uplink)2020-2025 MHz (Downlink )

900 MHZ:

880-915 MHz (Uplink)

925-960 MHz (Downlink)1800 MHZ:1710-1785 (Uplink)1805-1880 (Downlink)

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Comparison of WCDMA and GSM


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3G Network Architecture


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High-speed data transmissions Symmetrical and asymmetrical data transmission support Improved voice quality Greater capacity

Multiple simultaneous services Global roaming across networks Improved Security Service flexibility

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3G Capabilities


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Time to download 1 MB fileFixed line modem 3 minutesGSM cell phone 15 minutes

Enhanced GSM phone 1-5 minutes3G phone 21 seconds

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3G performance advantage


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ideo Messaging Applications

ideo Por tal TV on Mobile ideo cRBT ideo Streaming ideo Chat

ideo Mai l

c omm er ce a ppl ic at io ns

VideoCRBT

Video MailVideo CLI

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New VAS Products on 3 G Network

mobile network & 3g

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