3 g -Overview Mtnl
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CDMA ONE ,IS-95 GSM,DCS-1900UPLINK FREQ. 824-849 MHZ 890-915 MHz
DOWN LINK FRE. 869-894 MHZ 935-960 MHz
DUPLEXING FDD FDD
MULTI ACCESS CDMA TDMA
MODULATION BPSK GMSK
CARRIER SEPAR. 1.25 MHZ 200KHZ
CHANNEL DATA
RATE
1.2288MCPS 260.833KBPS
VOICE CHANNELPER CARRIER
64 8
SPEECH CODING CELP @ 13 Kbps,
EVRC @ 8 Kbps
RPE-LTP@13KBPS
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3-G is next generation ofmobile service
capabilities in terms ofBandwidth and Network
Functions.
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Spectrum in 2.1 GHZ Band ( UHF IN
Electromagnetic spectrum) UPLINK = 1885-----2025 MHZ
DOWNLINK = 21102200 MHZ.
Carrier separation = 5 MHZ
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53G is considerably faster than 2G and 2.5G technology.
0500
1000
1500
2000
2500
2G GPRS EDGE 3G
Kbps
3G provides data speeds of:
2Mbps in fixed or in building environments,
384Kbps in pedestrian or urban environments
144Kbps in wide area mobile environments
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Support of bit rate upto 2Mbps. Mechanism for Bandwidth on demand and
variable bit-rate services.
Quality services of speech,video,packet data Higher spectrum efficiency
Co-existence with 2-G systems.
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Due to limitation of 2-g
Low transfer rate
Low efficiency for packet-switched
services
Multiple air and network standards.
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Potential 3-g services includes:--- Voice, video calls
E-mail
SMS FAX,IPTV
Multimedia, Television Broadcast.
E-commerce,video conferencing
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Common Radio interface. Common Network Backbone .
Technology and service Flexible.
Modular Design---means 3G ImplementedStand Alone or in Many Existing Networkswith Gateways and Interworking units:
Framework for Mobility Services from Fixed Network
Multiple Networks in Same Area Can Be Used toProvide One Service
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2G Technology 3GTechnology
IS-95 CDMA
GSM
IS-136 TDMA
cdma2000
W-CDMA
UWC-136
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Standards
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3G Standard is created by ITU-T and is called as IMT-2000.
The aim of IMT-2000 is to harmonize worldwide 3Gsystems to provide Global Roaming.
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International Mobile Telecommunication
Standards For the 21st Century: IMT - 2000 ITU Radio and Network Standards Phased Implementation Allocated Spectrum 1.8 - 2.2 Ghz Family of Systems / Standards Support Circuit Data, Digital Voice and
Packet Services Minimum Speeds: 144 kbit - Vehicle, 384 kbit - Pedestrian,
2 Mbps - Fixed
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Member A
Member B
Member C
IMT-2000 Family
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The Family Members Must: Communicate With Each Other & Support:
Each Others Users via Roaming
Circuit Switched Voice
Packet Switched Data Services Interworking
3GPPs primarily, and ITU secondarily, plans to Developthis Function where it is needed
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UMTS is the European vision of 3G.
UMTS is an upgrade from GSM via GPRS or EDGE.
The standardization work for UMTS is carried out by Third
Generation Partnership Project (3GPP).
Data rates of UMTS are:
144 kbps for rural
384 kbps for urban outdoor
2048 kbps for indoor and low range outdoor
Virtual Home Environment (VHE)
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USER
EQUIPMENT(UE)
USIM
MOBILE EQUIPMENT
ACCESS
NETWORK(AN)
BSS-----RNS
BSC-----RNC
BTS-----NODE B
CORE
NETWORK(CN)
CIRCUIT SWITCHED
DOMAIN(CS)
PACKET SWITCHED
DOMAIN(PS)
COMMON ENTITIES
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SD
Mobile Station
MSC/
VLR
Base Station
Subsystem
GMSC
Network Subsystem
AUCEIR HLR
Other Networks
Note: Interfaces have been omitted for clarity purposes.
GGSNSGSN
BTSBSC
Node
BRNC
RNS
UTRAN
SIMME
USIMME
+
PSTN
PLMN
Internet
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UMTS network architecture consists of three
domains:
Core Network (CN) : To provide switching, routing and
transit for user traffic.
UMTS Terrestrial Radio Access Network (UTRAN) :
Provides the air interface access method for User
Equipment.
User Equipment (UE) : Terminals work as air interface
counterpart for Node B. The various identities are:
IMSI, TMSI, P-TMSI, TLLI, MSISDN, IMEI, IMEISV.
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Wide band CDMA technology is selected for UTRAN air
interface. Base Station is referred to as Node-B and control
equipment for Node-Bs is called is called as RadioNetwork Controller (RNC). Functions of NodeB are:
Air Interface Tx/Rx Modulation / Demodulation
Functions of RNC are:
Radio Resource Control
Channel Allocation
Power Control Settings Handover Control
Ciphering
Segmentation and Reassembly
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To accessnetwork
SGSNGGSN
MSC/VLRGMSC
AUC HLREIR
PS-DOMAIN
CS-DOMAIN
CS-CIRCUIT SWITCHED
PS-PACKET SWITCHED
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HLR---HOME LOCATION REGISTER AUC---AUTHENTICATION CENTRE
EIR----EQUIPMENT IDENTIFICATIONREGISTER
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LOCATION AREA
ROUTING AREA
UTRAN REGIS AREA
NODE-B
NODE-B
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PLMN IDENTIFIER= MCC + MNC
= 3 DIGITS + 2/3 DIGITS
Where,
MCC = Mobile country codeMNC= Mobile Network code
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LAI = MCC + MNC + LAC= 3 DIGITS +2/3 DIGITS + 2 OCTETS
Where,MCC = Mobile country code
MNC= Mobile Network code
LAC = Location Area Code
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RAI = LAI + RAC
WHERE ,
RAC= Routing Area Code ----1-octet.LAI = MCC + MNC+LAC
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GSN = Address Type + Address length +Address= 2-bits + 6-bits + n-octets
Where,
For ipv4= Address Type=0,Add.Length=4,n=4
For ipv6= Address Type=1,Add.Length=6,n=16
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CGI = LAI + C I= MCC +MNC +LAC +CI
Where,
CI= Cell Identity of 2-octets.
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THANKS PRAVEEN BHARDWAJ D.Mgr(Trg), DTTC
SHAIPUR