3g technology ppt

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What is 3G ?


3G is the 3rd Generation wireless technology. It comes with enhancment over previous wireless technology, like high-speed transmission, advanced multimedia access and global raoming. 3G is commonly used with mobile phones and handsets as a means to connect the phone to Internet or other networks in order to make voice and video calls, to download and upload data and to surf the net.
3G allows simultaneous use of speech and data services and higher data rates up to 14.0 Mbps.

1G


The First Generatio began in the early 80’s with commerical deplyment of Advanced Mobile Phone System (AMPS) cellular networks.

Early AMPS Networks used Frequency Division Multiple Access (FDMA) to carry analog voice over channels in the 800Mhz frequency band.


2G


The Second Generation emerged in the 90’s when mobile operators deployed two digital voice standards.

In North America some operators uses CDMA in 800 Mhz band

Across the world many operators adopted GSM standard, which used TDMA in 900 and 1800 Mhz bands.


History about 3G


The first commercial 3G network was launched by NTT DoCoMo in Japan on 1 October 2001

In 2008, India entered into 3G Mobile arena with the launch of 3G enabled Mobile services by Mahanagar Telephone Nigam Limited (MTNL). MTNL is the first Mobile operator in India to launch 3G services.

Applications :

Some of the applications are :

Mobile TV - a provider redirects a TV channel directly to the subscriber's phone where it can be watched.

Video on demand - a provider sends a movie to the subscriber's phone.

Video conferencing - subscribers can see as well as talk to each other.