1G:
1G means the first generation of wireless
telecommunication technology, which is commonly known as cell phones. First
wireless standards were made in 1980’s. This technology was based on analog
radio signals. Through this technology, a voice call was modulated to a
frequency of higher range of about 150MHz and transferred between towers. Its
basic technique was FDMA (Frequency Division Multiple Access). 1G had poor
voice quality and high security risk.
2G:
Second generation of
telecommunication usually cannot transfer software or emails. Other than voice
calls, SMS service is available on it. Progress made in 2G is GPRS and EDGE.
GPRS can provide data rates from 56kbps to 115kbps. MMS is also offered by
using GPRS. EDGE is the technology that is a step further ahead of GPRS. It is
three times faster than GPRS.
3G:
3G technology offers the user a wide
range of advanced services. Like, wide area wireless telephony, video calls and
high speed internet. Main technique used by 3G technology is HSPA (High Speed
Packet Access). HSPA is a protocol that provides smooth path for high speed
data travel. It is a packet based data service. It provides downlink speed up
to 8-10Mbps at 5MHz bandwidth. It enhances advanced person-person data
applications execution. It provides uplink up to 1.4-5.8Mbps.
4G:
4G means all-IP packet switched
mobile networks. It is basically an extension to the 3G technology, with wider
band and services range than 3G. While all the services are called 4G but the
underlying technology is not the same for all. No matter what technology is
being used by the service provider, 4G is designed to provide speed. 4G is 4 to
10 times faster than 3G.
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