overview of 3g
DESCRIPTION
Overview of 3GTRANSCRIPT
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Overview
Of
3G Mobile
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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.
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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?
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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.
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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.
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Mobile Soft switch SolutionLayered Architecture
Connectivity Layer
Control Layer
Application Layer
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Application Layer:-Provide Services & contents
Control Layer:-Provide Session & call control function
Connectivity Layer:-Physical transport & access tech.
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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
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Mobile Soft switch Solution
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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
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UMTS network structure
UE = User EquipmentRAN = Radio Access NetworkCN = Core NetworkNMS = Network Management System
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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.)
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1. MSC Server
2. MGW
3. HLR/AUC
4. SGSN
5. GGSN
6. Mobile PBN
7. OSS
8. Lawful Intercept System
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M-MGW
• Handel Payload
•Make IP/ATM/TDM transport possible in the back bone
•Echo Canceller
•Tone sending
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MSC Server :- Connection managementMobility managementChargingSecurity
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MSC
BSC
BTS
Chennai
Thanjavour
Thanjavour
Monolithic MSC Architecture
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Layered Architecture Call Control
Switching
M S C Server
Media Gateway
BSC
BTS
MGW MGW
BSC
BTS
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M S C Server
MGW
RNC
Node - B
BSC
BTS
SGSN GGSN
Internet
GSM N/W of BSNL would look like