3g overview issue 1.0

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OWA200001 3G Overview

ISSUE 1.0


Upon completion of this course, you will be able to:

Know the development of 3G

Know the feature of each 3G standard

Know the architecture of WCDMA system


Chapter 1 3G SummaryChapter 1 3G Summary

Chapter 2 3G Standard ContrastChapter 2 3G Standard Contrast

Chapter 3 WCDMA System Architecture Chapter 3 WCDMA System Architecture


Different Service, Different Technology

AMPS

TACS

NMT

Others

1G 1980sAnalog

GSMGSM

CDMA CDMA IS-95IS-95

TDMATDMAIS-136IS-136

PDCPDC

2G 1990sDigital

Technologies drive

3G IMT-2000

UMTSUMTSWCDMAWCDMA

CDMACDMA20002000

Demands drive

TD-SCDMA

TD-SCDMA

3G provides compositive services for both operators and subscribers

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3G Evolution

Proposal of 3G

IMT-2000: the general name of third generation mobile

communication system

The third generation mobile communication was first proposed in

1985 ， and was renamed as IMT-2000 in the year of 1996

− Commercialization: around the year of 2000

− Work band : around 2000MHz

− The highest service rate :up to 2000Kbps


3G Objectives

3G is developed to achieve:

Universal frequency band for standard and seamless global

coverage

High spectral efficiency

High quality of service with complete security and reliability

Easy and smoothly transition from 2G to 3G, compatible with 2G

Provide multimedia services, with the rates:

Vehicle environment: 144kbps

Walking environment: 384kbps

Indoor environment: 2Mbps


1850 1900 1950 2000 2050 2100 2150 2200 2250

ITU

Europe

USA MSSPCS

A D B BC D CE F A FE MSSReserveBroadcast auxiliary

2165 MHz1990 MHz

1850 1900 1950 2000 2050 2100 2150

2200 2250

1880 MHz 1980 MHz

UMTSGSM 1800 DECT MSS

1885 MHz 2025 MHz

2010 MHz

IMT 2000

MSSUMTS

Japan MSSIMT 2000MSSIMT 2000PHS

1895

1918

BC

1885

A A’

2170 MHz

IMT 20002110 MHz 2170 MHz

MSS MSS

CDMATDDWLL

FDDWLL

1980

2025MHz

GSM1800

CDMAFDDWLL

1960

1920

1945

China

cellular(1) cellular(2) cellular(2)

1805 MHz

1865

1865

1870

1885

1890

1895

1910

1930

1945

1965

1970

1975

3G Spectrum Allocation


Bands WCDMA used

Main bands

1920 ~ 1980MHz / 2110 ~ 2170MHz

Supplementary bands: different country maybe different

1850 ~ 1910 MHz / 1930 MHz ~ 1990 MHz (USA)

1710 ~ 1785MHz / 1805 ~ 1880MHz (Japan)

890 ~ 915MHz / 935 ~ 960MHz (Australia)

……

Frequency channel number ＝ central frequency×5, for main band:

− UL frequency channel number ： 9612 ～ 9888

− DL frequency channel number : 10562 ～ 10838


The reason to develop 3G

Increased capacity requirements ： some systems such as D-

AMPS ， GSM ， PDC ， PHS are approaching saturation

Developing rate of mobile communication : one decade one generation

Demands of high speed data service and multimedia service in

radio network


3G Application Service

Time Delay

BER

background

conversational

streaming

interactive


3G Application － Conversational and Background3G Application － Conversational and Background

Picture and Ring Picture and Ring tone downloadtone download

Vedio PhoneVedio Phone


3G Application － Streaming

Traffic monitoringTraffic monitoring Mobile TVMobile TV VODVOD


3G Application － Interactive

LCSLCSOnline gameOnline game



Chapter 2 3G standard contrastChapter 2 3G standard contrast



The Core technology of 3G: CDMA

CDMA

WCDMAWCDMACN: based on MAP and GPRS

RTT: WCDMA - FDD/TDD

TD-SCDMACN: based on MAP

RTT: TD-SCDMA

cdma2000CN: based on ANSI 41 and

MIPRTT: cdma2000


What is CDMA?

frequency

time

power

FDMA

frequencytime

power

TDMA

power

time

CDMA

frequency


Features of CDMA

High spectrum efficiency

Security

spreaded signal is close to noise

with ability of anti-interference

Soft capacity

More band occupancy

Self-interference system, Hard to carry out


WCDMA Protocol Version Evolution

3GPP Rel99

3GPP Rel4

3GPP Rel5

functionally frozen time

2000/03 2001/03 2002/03

GSM/GPRS Core Network

WCDMA RTT

CS domain change to NGN

WCDMA RTT

TD-SCDMA

IMS

HSDPA


cdma2000 Protocol Version Evolution

IS-95A

1995 1998 2000

Voice: QCELPData rate: 9.6kbps

Voice: same as 95AData rate: 115.2kbps

Voice: double capacity

Data rate: 307.2kbpscdma2000

1xEV-DO/DV

2002

DO: Data Only, 3Mbps

DV: Data and Voice

IS-95B

cdma20001x

cdma2000-3x

??

functionally frozen time


The development of TD-SCDMA

Started the research of TD-SCDMA

TD-SCDMAproposal finished

1990

1998

1999

TD-SCDMA was merged into WCDMA

TDD standard

TD-SCDMA was approved in the 3GPP conference, became the one of the three ultimate standards


Comparison between Three 3G Technologies

WCDMA cdma2000 TD-SCDMA

Multiple Access

methodFDMA ＋ CDMA FDMA ＋ CDMA FDMA ＋ TDMA ＋ CDMA

Duplex method FDD FDD TDD

Carrier band 5MHz 1.25MHz 1.6MHz

Chip rate 3.84Mcps 1.2288Mcps 1.28Mcps

Synchronization Asynchronous Synchronous Synchronous

Transmission

Diversity

STTD 、 TSTD

FBTDOTD 、 STS None

Receiver RAKE RAKE RAKE

Power control 1500Hz 800Hz 200Hz

HandoverSoft handover and

hard handover

Soft handover and

hard handoverBaton handover



Chapter 2 3G standard contrastChapter 2 3G standard contrast



WCDMA System Architecture

RNS

RNC

RNS

RNC

Core Network

Node B Node B Node B Node B

Iu-CS Iu-PS

Iur

Iub IubIub Iub

CN

UTRAN

UEUu

CS PS


WCDMA R99 Network Architecture

GSM /GPRS BSS

BTS

BSC

NodeB

RNC

PCU

UTRAN

SCP

SMS

SCE

MSC/VLR GMSC

HLR/AUC

SGSN

CGBG

GGSN

GPRS backbone/

Other PLMN

SS7

Internet,Intranet

PSTNISDN


WCDMA R4 Network Architecture

GSM /GPRS BSS

BTS

BSC

NodeB

RNC

PCU

UTRAN

SCP

SMS

SCE

HLR/AUC

SGSN

CG BG

GGSN

GPRS backbone

SS7

MGWMGW MGWMGW

IP/ATM Backbone

VMSC Server GMSC Server

PSTNISDN

Other PLMN

Internet,Intranet

www.huawei.com

Thank You

3g overview issue 1.0

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