Download - 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