|
|
|
|
Technology changes very
quickly, which is why you have to be very sure about the gadgets and
tools you purchase to get the most benefits. There are several
generations available, as far as mobile phones are concerned. You may
find that some are still very functional enough to provide for your
personal and professional needs. Here are some details about the
technology and corresponding network.
The Technical Terms
Generations are defined according to their period of existence. The
first kinds are 1G networks, namely C-Nets, NMT, TACS and AMPS which
are categorized among the first analogue cellular systems. These began
in the early periods of the 1980s. There are radio telephone systems
before these. The 2G networks, namely DAMPS, GSM and CDMAOne are the
initial digital cellular systems released during the early 1990s. The
2.5G networks, CDMA2000 1x and GPRS are the improved versions of the 2G
networks with information speeds moving up to 144 Kbps.
3G networks, namely UMTS TDD and UMTS FDD, CDMA2000 3x, TD-SCDMA,
CDMA2000 1x EVDO, Arib WCDMA, IMT-2000 DECT and EDGE are the most
recent cellular networks with data rates ranging up to 384 Kbit/s and
higher. 4G is generally a marketing concept at present. There are
already studies and research being conducted to develop the 4G,
although no frequencies have been assigned yet. This newest technology
is expected to launch in 2012.
The International Groups
ETSI or European Telecommunications Standards Institute is functioning
in Europe to improve technical standards for the UMTS. 3GPP or 3rd
Generation Partnership Project is a participation between international
standards groups will lead to UMTS and 3G mobile telephony technical
specifications. The starting members include TTC and ARIB from Japan,
TTA of Korea, T1 (ANSI) of the United States and ETSI from Europe. The
function of the groups is presented globally by the ITU or
International Telecommunication Union.
ITU direct worldwide spectrum and the standardization of IMT2000, lets
regional regulatory policies work together and is a framework and base
for 3G combination over different technologies and regions. The UMTS
Forum shows the opinions and views of the telecommunication operators
and industry. These are a mobile operator group, together with GSM
Associates. European Union or EU brings together the 15 members on
implementation of the UMTS.
Comparing UMTS
UMTS is quite different and unique from other 2G networks at present.
It offers higher speech quality that available networks now have, in
addition to speech traffic UMTS, with information services and advanced
information. UMTS is advantageous compared to 2G because of its
capacity to support 2 Mbit/s data speeds. UMTS is considered as a true
global system, made of both satellite and terrestrial components. The
consistent service area is one of the best aspects, even when the
person is roaming through the VHE or Virtual Home Environment. Users
still get to have a variety of services, despite a roaming status.
Being Wideband
WCDMA is called wideband, because 3G WCDMA systems have a bandwidth of
5 MHz in a single direction. 5 MHz is not considered wide or narrow,
but the bandwidth is relatively very high. The recent 3G WCDMA systems
have a bigger bandwidth compared to current 2G CDMA systems. The new 3G
WCDMA systems have wider bandwidth compared to current CDMA systems.
There are also commercial CDMA systems with 20 MHz bandwidth.
More on 3G: 2G to 3G Development 3G Compatibility 3G history 3G Networks 3G Now 3G Phones 3G Platforms 3G uses and features Advantages of 3G CDMA 2000 Choosing a 3G unit Evolution of Smart Phones 3G Demonstration An Introduction to 3G UMTS Uses of 3G WCDMA
Disclaimer: The information provided here is only
for
informative purposes and nothing more. It is not in any way to be
construed as authoritative. Always consult your advisor
before taking any decision. It is informed to the people that this
information that is provided here is not to be acted upon. In spite of
our advise, if any person acts upon the contents of this web site and
incurs a loss, they do it on their own risk. We are not to be held
responsible for any loss, incorrect information etc.
Privacy
Policy
|
|
|
|
