Today,
internet connection is available in mobile phones. This is made possible by
using GPRS technology, but now there are modern methods in accessing internet
through mobile phones, these are 3G and 4G technologies.
GPRS
uses packet data technology. With packet networks, you can immediately access
the mobile internet. This enables you to access the existing applications of
the internet such as email and web browsing without dialing into an ISP. Using the
medium or the radio link, several users can share the same radio channel very
efficiently. With packet data, users will only pay for the amount of data they
actually communicate and not the idle time. Packet based communication is
compatible with all other types of communication. GPRS can support the Internet
Protocol (IP) as well as X.25 protocol.
There is a new technology that takes cellular community closer to UMTS
or the 3G. It has a new modulation scheme called 8-phase shift keying (PSK). It
also provides higher data rates than GPRS. This technology is called Enhanced
Data for Global Environment (EDGE). The data rates allocated for EDGE are
started at 384 Kbps and above as a second stage to GPRS. EDGE uses a
combination of FDMA and TDMA as the multiple access control methods. If we view
the OSI stack model, EDGE uses FMDA and TDMA at the MAC layer.
EDGE is very special because its bandwidth is efficient than the GMSK
modulation scheme used in the GSM standard, it creates a new modulation scheme.
This technology provides a new physical layer: 8- PSK modulation, instead of
GMSK. EDGE still retains existing GSM parameters. These include frame length,
eight time slots per frame, and a 270.833 KHz symbol rate. These techniques
help EDGE to promote worldwide or globally into the market.
UMTS is part of a
global family of 3G mobile communications systems. It takes full advantage of
the trend of converging existing and future information networks, devices and
services, and the potential synergies that can be derived from such
convergence.
Mobile internet has many
applications. There are applications for moving to a wireless and a 3G environment.
These applications are customized infotainment, multimedia messaging service,
mobile intranet/extranet access, mobile internet access, location based services
rich voice, wireless advertising, mobile information, business solutions,
mobile transactions, mobile entertainment, person-person communications and
bearer entrance and periodic.
There is an issue that
needs to consider whether to simplify provide a wireless IP pipe to a service
offering hosted elsewhere on the internet, or to go for an interoperable
end-to-end solution. In wireless IP pipe business using tunneling protocols
will become a commodity operation, where cost, coverage, and data rate are the
only competitive dimensions.
Here are some advantages and disadvantages of 3G:
Advantages:
·
Overcrowding
is relieved in existing systems with radio spectrum.
·
3G
has more bandwidth, security and reliability.
·
Provides
interoperability among service providers.
·
Availability
of fixed and variable rates.
·
Support
to devices with backward compatibility with existing networks.
·
Always
online devices – 3G uses IP connectivity with existing networks.
·
Rich
multimedia services are available
Disadvantages:
·
The cost
of cellular infrastructure, upgrading base stations is very high.
·
Needs
different handsets.
·
Roaming
and data/voice work together has not yet been implemented.
·
Power
consumption is high.
·
Requires
closer base stations and are expensive.
·
Spectrum-license
costs, network deployment cost and handset subsidies subscribers are
tremendous.
Sources:
Broadband Telecommunications Handbook by Regis J.
Bates
http://www.careerride.com/3g-advantages-and-disadvantages.aspx
The 3G has the speed that the user wanted and is the latest that has been wide spread to the world today. 3G is the most common use of the people today. Good Job ^_^
ReplyDeleteThe current generation of cellular transmission, which primarily features higher speeds for Internet access.
ReplyDeleteanother thing 3G refers to the third generation of mobile telephony (that is, cellular) technology. The third generation, as the name suggests, follows two earlier generations.
ReplyDelete