International Mobile Telecommunication-2000 (IMT-2000) An Introduction.

International Mobile Telecommunication-2000 (IMT-2000)

An Introduction

In this presentation…

• Wireless Generations

• What is IMT-2000

• What IMT-2000 offers

• Key features and objectives

• Spectrum for IMT-2000

• Technologies for IMT-2000

• Migration paths

• Future Trends

MOBILE COMMUNICATION

• 1946- 1960s 1980s 1990s 2000s

• Appeared 1G 2G 3G

• Analog Digital Digital

• Multi Multi Unified

Standard Standard Standard

Terrestrial Terrestrial Terr. & Sat


• 1 G -analog (cellular revolution)

- only mobile voice services

WIRELESS GENERATIONS

• 2 G - digital (breaking digital barrier) - mostly for voice services & data delivery possible

• 3 G - Voice & data ( breaking data barrier)

- Mainly for data services where voice sevices will also be possible

• Beyond 3G -Wide band OFDM ?

- But surely higher data rates


• No Global standards

• No common frequency band

• Low information bit rates

LIMITATIONS OF 2nd GENERATION SYSTEMS

• Low voice quality

• No support of Video

• Various categories of systems to meet specific requirements


INTERNATIONAL MOBILE TELECOM 2000. ( IMT-2000)

IMT

A FUTURE STANDARD IN WHICH A SINGLE

INEXPENSIVE MOBILE TERMINAL CAN TRUELY

PROVIDE COMMUNICATIONS ANY TIME AND

ANY WHERE

THIRD GENERATION (3 G ) STANDARD



• PROVISIONING OF THESE SERVICES OVER WIDE RANGE OF USER DENSITIES AND COVERAGE AREAS.

(In-building , Urban , Sub-urban, Global)

• EFFICIENT USE OF RADIO SPECTRUM CONSISTENT WITH PROVIDING SERVICE AT ACCEPTABLE COSY.

• IMT-2000 SHALL COVER APPLICATION AREAS PRESENTLY PROVIDED BY SEPERATELY SYSTEMS I.E CELLULAR, CORDLESS AND PAGING etc

• A HIGH DEGREE OF COMMONALITY OF DESIGN WORLDWIDE

• A MODULAR STRUCTURE WHICH WILL ALLOW THE SYSTEM TO GROW IN SIZE AND COMPLEXITY

IMT-2000 KEY FEATURES


• ITU’s VISION FOR THIRD GENERATION MOBILE SYSTEM

• SINGLE UNIFIED STANDARD (Data & Multimedia Services)

• ANYWHERE, ANYTIME COMMUNICATION

ACROSS NETWORKS, ACROSS TECHNOLOGIES, SEAMLESS OPERATION USING A SMALL POCKET TERMINAL WORLDWIDE.

• HIGH SPEED ACCESS 144KB/S, 384 KB/S & 2MB/S FAST WIRELESS ACCESS TO INTERNET

• FULL MOTION VIDEOPHONE

• TERRESTRIAL & SATELLITE COMPONETS

IMT-2000 will provide..

• Enhanced voice quality, ubiquitous coverage and enable operators to provide service at reasonable cost

• Increased network efficiency and capacity• New voice and data services and

capabilities• An orderly evolution path from 2G to 3G

systems to protect investments.

• IMT -DS (Direct Spread) : W-CDMA UTRA FDD• IMT -MC (Multi Carrier) : CDMA 2000• IMT-TC ( Time Code) : TD -SCDMA UTRA TDD• IMT -SC ( Single Carrier ) : UWC - 136• IMT-FT (Frequency Time) : DECT

• PAIRED DS/ MC/SC ; UNPAIRED TDD

FURTHER HARMONIZATION In ProcessUTRA : UTMS Terrestrial Radio Access

UMTS :Universal Mobile Telecommunication System

IMT TECHNOLOGIESITU has finally narrowed down technology options to the following five:

IMT-DS IMT-MC IMT-TC IMT-SC IMT-FT

WCDMA CDMA20001X/3X

TDMACDMA FDMA

CDMA-TDD UWC-136 FDMA/TDMADECT

Technologies for IMT-2000IMT-2000 TERRESTRIALRADIO INTERFACES


• IMT standards development involves extensive collaboration between many different organizations

• Today’s operators need seamless 2G 3G• Many Focus groups have been established by industry

2 G operators GSM ; CDG ,UWCC, DECT forum

3 G Groups UMTS Forum , OHG

Focus group for IP-based 3G architecture (3G. IP)

SDOs created 3G PP (Partnership Projects)

SDO Standards Development Organizations

IMT-2000 HARMONIZATION IS ON-GOING

Migration Path

• While a multiplicity of 2G standards have been developed and deployed, the ITU wanted to avoid a similar situation to develop for 3G.

• Hence, the ITU Radio communication Sector (ITU-R) has elaborated on a framework for a global set of 3G standards, which will facilitate global roaming by operating in a common core spectrum and providing migration path from all the major existing 2G technologies.

• The major 2G Radio access networks are based on either CDMA One or GSM technologies and different migration path is proposed for each of these technologies.

GSM GPRS EDGE

PDC

CdmaOne

TDMA IS-136

TDMA/GPRS

TDMA/EDGE

Cdma 2000WCDMA

IMT-2000CPABLE SYSTEMS

2000 EVOLVED 2G

64-115 Kbps

TODAY 2G 19.2 Kbps

3G

115-384 Kbps 0.384-2 Mbps

Evolution from GSM to 3G

GSM2G

HSCSD

GPRS2.5G

EDGE

3G

GSM Evolution

GPRS200 KHz carrier115 Kbps peak data rates

EDGE200 KHz carrierData rates up to 384 Kbps8-PSK modulationHigher symbol rate

UMTS5 MHz carrier2 Mbps peak data ratesNew IMT-2000 2 GHz spectrum

GSM200 KHz carrier8 full-rate time slots16 half-rate time slots

GSM GPRS EDGE UMTS

3G2.5G2G

HSCSD

HSCSDCircuit-switched data64 Kbps peak data rates

EDGEEnhanced Data for GSM Evolution

• Next step towards 3G for GSM/GPRS Networks• Increased data rated up to 384 Kbps by bundling up to

8 channels of 48 Kbps/channel• GPRS is based on modulation technique known as

GMSK• EDGE is based on a new modulation scheme that

allows a much higher bit rate across the air-interface called 8PSK modulation.

• Since 8PSK will be used for UMTS, network operators will be required to introduce this at some stage before migration to 3G.

GSM GPRS EDGE

PDC

CdmaOne

TDMA IS-136

TDMA/GPRS

TDMA/EDGE

Cdma 2000WCDMA

IMT-2000CPABLE SYSTEMS

2000 EVOLVED 2G

64-115 Kbps

TODAY 2G 19.2 Kbps

3G

115-384 Kbps 0.384-2 Mbps

New modified routerSoftware

Upgrade

0101001010

Software Upgrade

0101001010

NewSoftware

0101001010

New Software0101001010


MSC

PSTN

BSC

BTS

GSM Network

SGSN

WWWEnterprise Network

VPN

IP Backbone

Adding GPRS Data

GGSN

GPRSBackbone

New Equipment

BSCBSC Upgrade

New Terminal

New cell sites(in some cases)

Modem Pool

BTS

Software Upgrade

0101001010

BSC Upgrade

NewSoftware

0101010100


00


MSC

PSTN

BSC

BTS

SGSN

WWWEnterprise Network

VPN

IP Backbone

GGSN

GPRSBackbone

New modified router

New Equipment

BSC

New Terminal

New cell sites(in some cases)

Modem Pool

BTS

3G DataBackbone

3G GGSN

W-CDMA BSC

3G SGSN

New Equipment

& Software

New Equipment & Software

W-CDMA BTS

New Terminal

Adding W-CDMA

GSM to UMTS

GSMBTS

GSMBSC

GSMMSC

PDN,(e.g. Internet)

GPRSCore

GPRSCore

Gb

AbisA

PSTN,ISDN

IntegratedUMTS CoreIntegrated

UMTS CoreUMTSBTS

UMTSBSC

UMTS Access Network

Iu-r

Gs

Iu

Iubis

OtherPLMN

GSM Elements

UMTS Elements

ServiceCreation/

Mgmt.

GSM

• Voice• 9.6 kbps

IS-136

• Voice• 9.6 kbps GSM GPRS

• 30-40 kbps Packet• RF Backward Comp.

PDC


PDC

• Voice• 28.8 kbps• RF Backward Comp.

W-CDMA(Japan)

IS-95-A


• 2.4 Mbps Packet• RF Backward Comp.

• Higher Cap Voice/ Data• RF Backward Comp.

1xEV-DO 1xEV-DV

1995 1999 2000 2001 2002 2003

• 384 kbps Packet

Edge (Europe)Edge (US)

W-CDMA

• High Capacity Voice• 384+ kbps Packet• New RF

IS-95-B

• Voice• 64 kbps Packet• RF Backward Comp.

cdma20001X MC

• High Capacity Voice• 153 kbps Packet• RF Backward Comp.

cdma20003X MC

• High Capacity Voice• 384+ kbps Packet• RF Backward Comp.

MIGRATION PATH

Migration Summarized

• In terms of migration of major 2G system to 3G capabilities, there would finally be 3 modes of CDMA-based radio interfaces (MC-CDMA, W-CDMA and CDMA-TDD) and two `TDMA based radio interfaces (UWC-136 and DECT).

• Considerable work is being carried out in respect of W-CDMA and CDMA 2000 worldwide. All European countries are expected to deploy W-CDMA as they have GSM based networks. While other countries such as Japan, Korea, USA etc. are likely to use CDMA-2000 or W-CDMA.


FUTURE TRENDS FUTURE HIGH- SPEED WIRELESS DATA NEEDS

• 2 - 10 Mb/s packet data rates with wide spread macro-cellular coverage

• Ability to allocate maximum resources to individual cells in sub-second time.

• Less transmitted powers• Further Reduction in cost

IMPLEMENTATION ISSUES

* MINIMUM SPECTRUM PER OPERATOR

* NO. OF OPERATORS

* SERVICE AREA OF OPERATION

* LICENCING METHOD

* TECHNOLOGY

* INTERCONNECTION ARRANGEMENTS

EXISTING USERS

• IMT-2000 BAND IS 1885-2025AND 2110-2200 MHz

• PRESENTLY 1800-2000 MHz BAND IS WITH

DEFENCE

• 2000-2200 MHz IS USED BY BHARAT SANCHAR

NIGAM/MTNL FOR POINT TO POINT MICROWAVE

LINKS

• WPCC TO COORDINATE WITH USERS FOR

VACATING THESE BANDS

International Mobile Telecommunication-2000 (IMT-2000) An Introduction.

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