3G Technology(1)

Introduction

·         3G is the third generation of wireless technologies.

o   High-speed transmission

o   Advanced multimedia access

o   Global roaming

·         3G is mostly used with mobile phones and handsets as a means to connect the phone to the Internet or other IP networks in order

o   To make voice and video call.

o   To download and upload data and to surf the net.

How 3G is better?

·         3G has the following enhancements over 2.5G and previous networks:

• Several times higher data speed;
• Enhanced audio and video streaming;
• Video-conferencing support;
• Web and WAP browsing at higher speeds;
• IPTV (TV through the Internet) support.

3G Technical Specifications:

·         The transfer rate for 3G networks is between 128 and 144 kbps (kilobits per second) for devices that are moving fast and 384 kbps for slow devices.

·         Fixed wireless LANs, the speed goes beyond 2 Mbps.

·         3G is a set of technologies and standards that include W-CDMA, WLAN and cellular radio.

·         3G follows a pattern of G's that started in the early 1990's by the ITU.

·         The pattern is actually a wireless initiative called the IMT-2000 (International Mobile Communications 2000).

·         3G therefore comes just after 2G and 2.5G, the second generation technologies.

·         2G technologies include the Global System for Mobile (GSM) - the famous mobile phone technology we use today.

·         2.5G brings standards that are midway between 2G and 3G, including the General Packet Radio Service (GPRS)

·         3G brings Enhanced Data rates for GSM Evolution (EDGE), Universal Mobile Telecommunications System (UMTS) etc.