Download Overview of 3G

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
Multimedia
High speed mobile Broadband
Internet Access
Ability to view video footage on your mobile handset.
What is Third Generation?
1st Generation
2nd Generation
3rd Generation
Analog speech
Digital speech +
low-rate data (  64 kbps )
High data rates
(384kbps -14.4 Mbps)
+ 2 nd gen. services
NMT, AMPS, TACS
GSM, PDC,
IS-136, IS-95
UMTS/IMT-2000
1980
24-Apr-09
1990
2000
2
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.
24-Apr-09
4
Spectrum for 3G Systems
The IMT 2000 band has been identified in most of the
countries for the launch of 3G servicesUplink-
1920-1980 MHz,
Downlink- 2110-2170 MHz.
24-Apr-09
20
Mobile Soft switch Solution
Layered Architecture
Application Layer
Control Layer
Connectivity Layer
Application Layer:-Provide Services & contents
Control Layer:-Provide Session & call control function
Connectivity Layer:-Physical transport & access tech.
Mobile Soft switch Solution
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
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 Equipment
RAN = Radio Access Network
CN = Core Network
NMS = 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 management
Mobility management
Charging
Security
Monolithic MSC Architecture
MSC
Chennai
BSC
Thanjavour
BTS
Thanjavour

Layered Architecture
Call Control
Switching
MSC
Server
Media Gateway
BSC
BSC
BTS
BTS

MGW


MGW
GSM N/W of BSNL would look like
MSC
Server
MGW
BSC
RNC
BTS
Node - B
Internet
SGSN
GGSN