Cellular Mobile Wireless Services

Several broadband wireless data services are extensions of cellular mobile
telephone technology. You might see them described as 3G services because
they’re based on the third generation of cellular telephone technology. If
you have been using a mobile telephone for more than a year or two, you
probably remember that the earliest phones were only good for voice calls,
but as each new generation was introduced, your mobile carrier offered
more and better features. Table 2-2 describes the various generations.
For people who use their computers away from their home or office, the
great advantage of a mobile broadband service is that it covers a much wider
territory than any Wi-Fi base station; you can connect your computer to the
Internet without the need to search for a new hot spot and use a different
access account in each new location, and you can even keep the same connection
alive in a moving vehicle. Each of the major wireless broadband services
offers coverage in most metropolitan areas and much of the countryside
between cities.















Table 2 :- Cellular Mobile Telephone Generations
Name Features
1G Analog voice communication only
2G System can handle more calls
Digital voice
Uses less power
Less background noise
Digital data
Simple text messages
Email

2.5G Packet-switched signaling
Faster data transfer (up to 144Kbps)
Supports relatively slow Internet connections

3G Even more calls at the same time
Much faster data transfer rates (up to 2.4Mbps)
Broadband Internet
Video and music

4G Based on Internet technology
Packet signaling
Very high speed (100Mbps–1Gbps)
Will combine telephone, computer, and other technologies