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There are several systems
developed for 3G technology, which explains why people should be more
aware about the changes and details of their new gadgets. 3G devices
can cost a lot of money, so you should learn how to check the specs and
platforms first if these work very well for your personal functions and
work. UMTS is one of the most common systems. You will find that it is
also one of the most ideal to use if ever you choose to invest.
Defining UMTS
UMTS stands for Universal Mobile Telephone System. It is one of the 3G
or third generation mobile systems created and developed inside the
framework of the ITU IMT-2000. It presents the new generation of
broadband multi-media mobile telecommunications technology. The area
covered by service providers will be on a global scale, through the
FLMTS type or Future Land Mobile Telecommunications Services.
This is now known as IMT2000. The coverage will be given through a
mixture of cell sizes starting from in-building Pico Cells to the
satellite Global Cells. These provide services to the far areas of the
globe. The UMTS is not an alternative of 2G or second generation
technologies like DCS1800, GSM and CDMA that constantly changes to
their optimum potential.
The Various Kinds
There are several networks types featured by 3G technology. ITU
suggestion ITU-R M.1457 indicates 5 kinds of 3G radio interfaces.
Inclusions are the IMT-2000 DECT assisted by the DECT forum, the
IMT-2000 TDMA Single Carrier, which is also called UWC-136 or Edge,
assisted by UWCC, the IMT-2000 CDMA that spreads directly, also called
UTRA FDD which includes WCDMA in Japan. UMTS is developed by 3GPP,
IMT-20000 CDMA, also called CDMA2000 3x developed by 3GPP and IMT-2000
CDMA TDD which is also called UTRA TDD and TD-SCDMA.
The Core Networks
There are various types of 3G core networks. The group IMT-2000 of 3G
systems involves 3 kinds of core network technology. The first one is
the Internet Protocol based in the future to be specific, the GSM based
protocols over SS7 protocols for signalling and the ANSI-41 based or
IS-634 protocols for sending signals.
CDMA2000 and UMTS Comparison
If you want to compare UMTS and CDMA2000, you can begin by telling
their origins. Both were developed individuals and are separate 3G
standards approved by ITU. CDMA2000 1xRT and future CDMA2000 3x were
enhanced to be backward compatible with CDMA One. The two 1x types are
similar in terms of bandwidth and chip rate. Successful deployment in
America requires backward compatibility. UMTS was enhanced primarily
for nations having GSM networks.
These prime countries are prioritized, since they agree to free new
frequency ranges for the networks of UMTS. The benefit is that there
are a lot of new capacities for operators because of the new range of
frequency. 3GPP manages the standard development and keeps the core
network very close to GSM network as much as possible.
Compatibility
UMTS cellular phone units are not intended to be backward compatible
with the systems of GSM. There are two flavors available for UMTS,
namely FDD and TDD. FDD is implemented first. There are also a number
of harmonizations done between the systems, such as pilot issues and
chip rate. Always consider your intended functions and level of
experience before choosing the right kind to buy and use.
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
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