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MOBILE TELECOMMUNICATION

NETWORKSEEE F431/EA C452

Sarang C. Dhongdi

EEE & I

BITS, Pilani-K.K. Birla Goa CampusLecture 1

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Brief Introduction

During the past three decades, the world has seensignificant changes in the telecommunication industry.

There has been rapid growth in wirelesscommunications, as seen by the expansion in mobile

systems Wireless systems consist of Cellular system,

WLAN,WPAN

Over 1% of the worlds wireless subscriber had

already abandoned wired telephone service Rely solely on cellular service provider for telephone

access

Handsets are mass produced at low cost

Internet Technology has advanced

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Some Statistics !!!

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Interesting point

Techno-politics is the fundamental driver in theevolution of new technology and services,since radio propagation usage is controlled by

govt, not by service providers, equipmentmanufacturers, entrepreneurs, or researchers

Progressive involvement in technology

development is vital for govt if it hopes to keepits own country competitive in the rapidlychanging field of wireless personalcommunication

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Scope of the subject

Fundamentals of Cellular communication

Mobile network architecture

Telecommunication networking

Wireless data services

GSM CDMA Evolution towards 3G 4G vision

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Mobile telecommunication

network

PSTN

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Wireless networks

Based on Network architecture

Infrastructure-based network

Fixed network structure

Strict signaling sequence

Infrastructure-less network

Dynamically formed thru cooperation

Each node can make independent decision

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Wireless networks

Based on communication coverage area Wireless Wide Area Networks (WWANs) Cellular networks

Satellite networks

Wireless Metropolitan Area Networks (WMANs) 802.16 broadband wireless access

Wireless Local Area Networks (WLANs) 802.11 (WiFi)

HiperLan2

Wireless Personal Area Networks (WPANs) Bluetooth

Infrared

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Generations of mobile system

First Generation (1G)

Analog cellular system (Frequency modulation)

Ex(US) AMPS (Advanced mobile telephone

system)

(Europe) TACS (Total access comm sys)

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Generations of mobile system

Second Generation (2G)

Uses digital multiple access technology(TDMA or CDMA)

Ex GSM (Global system for mobile comm)CDMA (Code Division Multiple Access)

D-AMPS (Digital AMPS)

CT2 (Cordless telephone)PACS (Personal access comm sys)

DECT4 (Digital european cordlesstelephone)

Will be introduced in detail in later classes

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Generations of mobile system

2.5 G mobile systems

More data centric

Information (Voice or data) can be broken into

packets and routed by network

Offers wireless multimedia IP based services and

apps ExGPRS (General Packet Radio Service)

EDGE ( Enhanced Data rate for GSM

Evolution)

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Generations of mobile system

Third Generation (3G services)

Fully multimedia oriented

Seamless services across wired and wirelessnetwork

Universal Mobility

Uses advanced/Hybrid Multiple access techniques

Ex-

UMTS (Universal Mobile Telecomm System)

MBS (Mobile Broadband System)

CDMA 2000