3 g -Overview Mtnl

8/22/2019 3 g -Overview Mtnl

1/32


2/32

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


3/32

3-G is next generation ofmobile service

capabilities in terms ofBandwidth and Network

Functions.


4/32

Spectrum in 2.1 GHZ Band ( UHF IN

Electromagnetic spectrum) UPLINK = 1885-----2025 MHZ

DOWNLINK = 21102200 MHZ.

Carrier separation = 5 MHZ


5/32

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


6/32

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.


7/32

Due to limitation of 2-g

Low transfer rate

Low efficiency for packet-switched

services

Multiple air and network standards.


8/32

Potential 3-g services includes:--- Voice, video calls

E-mail

SMS FAX,IPTV

Multimedia, Television Broadcast.

E-commerce,video conferencing


9/32

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


10/32

2G Technology 3GTechnology

IS-95 CDMA

GSM

IS-136 TDMA

cdma2000

W-CDMA

UWC-136


11/32

Standards


12/32

12

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.


13/32

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


14/32

Member A

Member B

Member C

IMT-2000 Family


15/32

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


16/32

16

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)


17/32


18/32


19/32

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


20/32

20

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


21/32


22/32

22

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.


23/32

23

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


24/32

To accessnetwork

SGSNGGSN

MSC/VLRGMSC

AUC HLREIR

PS-DOMAIN

CS-DOMAIN

CS-CIRCUIT SWITCHED

PS-PACKET SWITCHED


25/32

HLR---HOME LOCATION REGISTER AUC---AUTHENTICATION CENTRE

EIR----EQUIPMENT IDENTIFICATIONREGISTER


26/32

LOCATION AREA

ROUTING AREA

UTRAN REGIS AREA

NODE-B

NODE-B


27/32

PLMN IDENTIFIER= MCC + MNC

= 3 DIGITS + 2/3 DIGITS

Where,

MCC = Mobile country codeMNC= Mobile Network code


28/32

LAI = MCC + MNC + LAC= 3 DIGITS +2/3 DIGITS + 2 OCTETS

Where,MCC = Mobile country code

MNC= Mobile Network code

LAC = Location Area Code


29/32

RAI = LAI + RAC

WHERE ,

RAC= Routing Area Code ----1-octet.LAI = MCC + MNC+LAC


30/32

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


31/32

CGI = LAI + C I= MCC +MNC +LAC +CI

Where,

CI= Cell Identity of 2-octets.


32/32

THANKS PRAVEEN BHARDWAJ D.Mgr(Trg), DTTC

SHAIPUR

3 g -Overview Mtnl

Documents

Transcript of 3 g -Overview Mtnl