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Overview of 

3G Network 

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3G Standardization:

Two partnership projects have been established to accelerate allaspects of 3G standardization

1. 3GPP- UMTS

2. 3GPP2- CDMA2000

Main thrust of each project is to find commonality for their respectivestandards across regions

Global harmonization could enable:

lower overall costs faster product cycles

faster operator implementation of 3G services

3G Partnership Projects 

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3GPP Release

3GPP Rel99

3GPP Rel4

3GPP Rel5

2000/03  2001/03  2002/03 

GSM/GPRS Core Network

WCDMA

CS domain change to NGN

WCDMA Radio

HSDPA (DL=14.4 Mbps)

3GPP Rel6

HSUPA (UL=5.76Mbps)

MBMS: multimedia broadcast and Multicast service

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3GPP rel 99 Architecture

SS7

IP

BTS

BSCMSC

VLR

HLRAuC

GMSC

BSS

SGSN GGSN

PSTN

PSDN

CN

CD

GcGr

Gn Gi

Abis

Gs

B

H

AE PSTN

2G MS (voice only)

2G+ MS (voice & data)

Gb

3G UE (voice & data)

Node B

RNC

RNS

Iub

IuCS

ATM

IuPS

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3GPP rel4 Architecture- 

Soft Switching 

SS7

IP/ATM

BTS

BSCMSC Server

VLR

HLRAuC

GMSC server

BSS

SGSN GGSN

PSTN

PSDN

CN

CD

GcGr

Gn Gi

Gb

Abis

Gs

B

H

ANc

2G MS (voice only)

2G+ MS (voice & data)

Node B

RNC

RNS

Iub

IuCS

IuPS

3G UE (voice & data)

Mc

CS-MGW

CS-MGWNb

PSTNMc

ATM

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GSM vs WCDMA

GSM WCDMA

Base Station Subsystem(BSS)

Radio Access Network(RAN)

Base Station Controller

(BSC)Radio Network Controller

(RNC)

Base Transceiver Station(BTS)

Node B.

TDMA & FDMA WCDMA

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RNC  RNC 

Core Network 

Node B Node B  Node B  Node B 

Iu Iu

Iur

Iub IubIub Iub

Uu (the “radio interface”) 

C h 

a n 

n e  l 

  4 s

ak 

d j

f 

 

f j

 

as

ld 

f  

q w 

e 

r r 

ti

u

 

c  

.

sa

k d 

jf 

 

f j

 

as

ld 

f  

q w 

e 

r r 

ti

u

 

c  

.

sa

k d 

jf 

 

f j

 

as

ld 

f  

q w 

e 

r r 

ti

u

 

c  

.

UTRAN: Universal terrestrial radioaccess Network

RNC: Radio Network ControllerUE: User Equipment

UTRAN

3G UMTS Architecture

UE 

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User equipment

USIM: Universal Subscriber Identity Module

USIM

ME

UE

Cu

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 2G

3G

Complete evolution from 2G to 3G

Evolution should cover not only the technical evolution of network

elements but also expansions to network architecture and services.

When these three evolution types go hand in hand the smoothmigration from 2G to 3G will be successful.

Technical evolution

Network evolution

Service evolution