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4 G wireless Technology |
| How 4G can be used even before 3G is fully functional? |
4G can be used simply because unlike other technologies, the cellular technologies today are classified based upon transmission rates. As we discussed earlier, difference between 1G and 2G was that 1G used Analog systems, while 2G used digital technology. The technology used for 2G. 3G and 4G is essentially the same (digital).
The rate of transmitting data in 2G is 10 Kilobits per second to a max of 100 Kilobits per second, for third generation mobile (3G) data rates are 384 kbps (download) maximum, In 4G technology, the rate of download is 20 Mega bits per second.
As the technology is progressing so are the capabilities. Today phones can be used like laptops and large files, emails can be downloaded to the phone itself. People can play online games, listen to radio and songs, have conferences with people at distant places and receive streaming videos (live shows).
The companies that provide the cellular services use certain standards. The popular standards used are GSM and CDMA. |
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GSM is Global System for Mobile communications (GSM). The standard is the most popular compared to other standards, and thus one can use a GSM phone anywhere in the world.
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| GSM systems have quite a few advantages |
- Short Message Service (SMS) for text messages and paging
- Call forwarding
- Caller ID
- Call waiting
- Multi-party conferencing
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