Information Systems

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3G networks are not IEEE 802.11 networks. IEEE 802.11 networks are short range,

higher-bandwidth (primarily) data networks, while 3G networks are wide area cellular telephone

networks which evolved to incorporate high-speed internet access and video telephony.

Features

The most significant feature offered by third generation (3G) mobile technologies is the

capacity to support greater numbers of voice and data customers — especially in urban centres

— as well as higher data rates at lower incremental cost than 2G.

3G uses 5 MHz channel carrier width to deliver significantly higher data rates and

increased capacity compared with 2G networks. The 5 MHz channel carrier provides optimum

use of radio resources for operators who have been granted large, contiguous blocks of spectrum.

On the other hand, it also helps to reduce the cost to 3G networks while being capable of

providing extremely high-speed data transmission to users. It also allows the transmission of

384kbps for mobile systems and 2Mbps for stationary systems. 3G users are expected to have

greater capacity and improved spectrum efficiency, which will allow them to access global

roaming between different 3G networks

6.2.5 4-G

4G is short for fourth-generation cellular communication system. There is no set

definition to what 4G is, however the features that are predicted for 4G can be summarized in a

single sentence:

The 4G will be a fully IP-based integrated system of systems and network of networks

achieved after the convergence of wired and wireless networks as well as computer, consumer

electronics, communication technology, and several other convergences that will