MOBILE

COMMUNICATION

SYSTEMS

>An electronic telecom device>Often referred to as a cellphone.>Mobile phones connect to wireless communication network through radio wave or satellite transmissions>Most mobile phones provide voice communications,Short Message Service

(SMS), Multimedia Message Service (MMS) and also provide Internet services such

as Web browsing and e-mail.

What is a MOBILE

From WARS…..

….To introductionof radio telephone

system inCARS

photography & texting

From

...To social Networkingthrough mobile Internet

MOBILE COMMUNICATION

SYSTEMS&

WIRELESSNETWORKS

ARESETTING THE FUTURE

SCOPE OF WIRELESS SYSTEMS

10/10/2011

In the past 3 decades,the world has seen significant changes in the telecom indusrty

There has been rapid growth in wireless communication and large expansion in mobile systems

Currently,wireless data represents 15%-20% of all air time

More than 10 billion people use wireless e-mail & INTERNET related wireless services

Wireless $ystemsconsist of ~

WWAN>Wireless Wide Area NetworkWLAN>Wireless Local Area NetworkWPAN>Wireless Personal Area Network

BLUETOOTH Ultra WideBand{ UWB }

Sensor Networks Zigbee

WPANShort Range & Low Power

Home RF

IEEE802a,b,g

WLANMedium Range & Medium Power

WWANLong Range & High Power

2G GSM

PDC

GPRS PHS

3G

the “Generation”’s

of cellular $ystem

1G •CELLULAR NETWORKS

2G •DIGITAL NETWORKS

3G •HIGH SPEED IP DATA NETWORKS AND MOBILE BROADBAND

4G •ALL IP NETWORKS

1G = Cellular Networks

>The 1st commercially available cellular network using 1G was introduced by NTT {Nippon Telegraph & Telephone} in 1979 in Japan>1G networks used analog signals,as opposed to digital signals used by the future succesive generations.

1G = Cellular Networks

>In 1G,voice communications were simply modulated to a higher frequency,about 150 MHz and more>At this time,the TDMA{Time Division Multiple Access} technology was used

Martin is credited with developing the 1st 1G cell phone approved for commercial use

2G = Digital Networks>2G was commercially launched by Radiolinja in 1991 in Finland

>2G mobile systems emerged primarily using the GSM{Global System for Mobile communication} standard

>2G allowed for enhanced data services & also introduced SMS{Short Message Service}

2G = Digital Networks>In 2G,voice communications were digitallly encrypted,allowing greater privacy,efficient data transfer & less expensive equipment

>Two revisions to 2G are reffered as 2.5G & 2.75G

2.5G >The combined introduction of GPRS {General Packet Radio Service} & the usage of CDMAone {Code Division Multiple Access} networks were collec- -tively known as 2.5G

>Services like WAP{Wireless Application Protocol} & MMS were introduced,along with InterNet services

2.75G >2.75G was the name given to the evolution of Enhanced GPRS{EGPRS}

>2G is the most widely used generation of mobile communication networks

3G = High $peed IP data & Mobile Broadand>3G was introduced by NTT DoCoMo in Japan in 2001

>3G used completely different radio frequencies from 2G.Thus,it required different equipment to achieve the new high data transfer rates

3G = High $peed IP data & Mobile Broadand>Also,the enormous costs of additional spectrum licensing fees delayed introduction of 3G in many countries

>The main difference between 2G & 3G technologies is the use of packet switching rather than circuit switching for data transmission

3G = High $peed IP data & Mobile Broadand>3G transfer rates are 384 kbps to 2Mbps allowing previously unavailable services like video calss,video conferencing, online conference call,mobile TV,online gaming etc….

>Along with these services,3G provides greater security & privacy

3G = High $peed IP data & Mobile Broadand>As with 2G,minor evolution of the standards resulted in 3.5G and 3.75G

>These standards allowed for higher data

transfer rates exceeding 2Mbps,reaching reaching about 14Mbps

4G = All IP Network>The next generation,4G mobile phones are all set to provide data transfer rates of 100Mbps to 1Gbps.Such speeds are not even present in wired networks commercially

>The 1st two commercially available technologies billed as 4G are the WiMAX standard & the LTE standard

4G = All IP Network>One of the main ways in which 4G differs from 3G is its elimination of circuit switch- -ing,instead employing all IP networks {Internet Protocol}>Thus,4G ushered in a treatment of voice calls just like any other type of streaming audio media,utilising packet switching over InterNet,LAN or WAN networks via VoIP{Voice over InterNet Protocol}-which delivers voice communi-

4G = All IP Network -cations & multimedia sessions over IP-networks,such as th InterNet