Overview

Of

3G Mobile

3G AWARENESS•3G is the next generation mobile communications systems.•3G is basically an ITU defined set of standards, which along with other specifications provides for minimum data speed of 384 kbps.•It enhances the services such as

MultimediaHigh speed mobile BroadbandInternet AccessAbility to view video footage on your mobile handset.

224-Apr-09

High data rates(384kbps-14.4 Mbps)+ 2nd gen. services

1990 2000

1st Generation 2nd Generation 3rd GenerationAnalog speech Digital speech +

low-rate data ( 64 kbps)

NMT, AMPS, TACS GSM, PDC, IS-136, IS-95

UMTS/IMT-2000

1980

What is Third Generation?

424-Apr-09

Third Generation System

Third generation systems are designed for multimedia communications; With them person to person communication can be enhanced with high quality images and video, And access to information and services on public and private networks will be enhanced by higher data rates.

2024-Apr-09

Spectrum for 3G Systems

The IMT 2000 band has been identified in most of the countries for the launch of 3G services-

Uplink- 1920-1980 MHz, Downlink-2110-2170 MHz.

Mobile Soft switch SolutionLayered Architecture

Connectivity Layer

Control Layer

Application Layer

Application Layer:-Provide Services & contents

Control Layer:-Provide Session & call control function

Connectivity Layer:-Physical transport & access tech.

Mobile soft switch enable a layered architecture design for the mobile circuit core , where the network functions responsible for service management & control and for transport of service data are physically & logically separated

Mobile Soft switch Solution

Mobile Soft switch Solution

Advantages of Mobile Soft switch Solution

1. Packet backbone technology (IP or ATM) enables more efficient transmission of voice traffic over the backbone by retaining the same voice coding in the backbone as is used in the air interface

2. Access independent (GSM/WCDMA) core network

3. Reduction of backbone traffic

4. Simplification of network planning through common core for WCDMA & GSM

UMTS network structure

UE = User EquipmentRAN = Radio Access NetworkCN = Core NetworkNMS = Network Management System

Radio Access Method is Wideband Code Division Multiple Access

(WCDMA).

In GSM, we use TDM (Time Division Multiplexing) as the transmission method between the different network elements. For UMTS, ATM (Asynchronous Transfer Mode) has been chosen as the transmission method in the radio access network.

The basic difference between TDM and ATM is that in TDM, we use timeslots for conveying information between network elements. In ATM, on the other hand, the data is transmitted in cells (packets) of fixed size across the network. (An ATM cell has 48 octets of payload, 5 octets of headers.)

1. MSC Server

2. MGW

3. HLR/AUC

4. SGSN

5. GGSN

6. Mobile PBN

7. OSS

8. Lawful Intercept System

M-MGW

• Handel Payload

•Make IP/ATM/TDM transport possible in the back bone

•Echo Canceller

•Tone sending

MSC Server :- Connection managementMobility managementChargingSecurity

MSC

BSC

BTS

Chennai

Thanjavour

Thanjavour

Monolithic MSC Architecture

Layered Architecture Call Control

Switching

M S C Server

Media Gateway

BSC

BTS

MGW MGW

BSC

BTS

M S C Server

MGW

RNC

Node - B

BSC

BTS

SGSN GGSN

Internet

GSM N/W of BSNL would look like