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The Journey of ³G´ from 1 to 5 th Generation
Until the controversial spectrum scams were brought up in the l ime light many were ignorant of
what 1G, 2G or 3G stood for and all of a sudden a hike was found out amongst laymen so as to
be knowledgeable about it. Still a number of people are unaware of 1G or 2G when the world has
moved on to 4G.
The telecommunication service in World had a great leap within a last few year. . 6 billion people
own a mobile phones so we are going to analyze the various generations of cellular systems as
studied in the evolution of mobile communications from 1st generation to 5th generation .Now
almost all the service providers as well as the customers seek for availing these 3G and 4G
services.
We can analyze that this could be due to increase in the telecoms customers day by day. In the
present time, there are four generations in the mobile industry. These are respectively 1G the
first generation, 2G the second generation, 3G the third generation, and then the 4G the forth
generation. Ericson a Swedish company is launching this high tech featured mobile into the
market. It is being first introduced in the Swedish Capital city, Stockholm.
Present Status of Telecommunication Services in Asian CountriesNow we are in the midst of 4G. In China, the 3G service came into existence only by last
February. Therefore, that it may take time for exposing to other states. But we should also realize
many other countries such as the Asian countries were using these services since last decade.
Due to these reasons, we can hope that the 4G may enter within a few years. The 3G (Third
Generation) had also reached India recently. There is no doubt that within a few years India will
be the first in telecom users also.
What is 2G ?
Second Generation (2G) wireless cellular mobile services was a step ahead of First Generation(
1G) services by providing the facility of short message service(SMS) unlike 1G that had its prime
focus on verbal communication. A typical 2G G.S.M network service ranges from 800/900MHz or
1800/1900 spectrum. The bandwidth of 2G is 30-200 KHz.
Let us examine what these 3G & 4G have rather than that of 1G and 2G.
Analysis of 1G and 2G services
In 1G, Narrow band analogue wireless network is used, with this we can have the voice calls and
can send text messages. These services are provided with circuit switching. Today¶s the usual
call starts from the beginning pulse to rate to the final rate. Then in case of 2G Narrow Band
Wireless Digital Network is used. It brings more clarity to the conversation and both these circuit-
switching model.
Both the 1G and 2G deals with voice calls and has to utilize the maximum bandwidth as well as alimited till sending messages i.e. SMS. The latest technologies such as GPRS, is not available in
these generations. But the greatest disadvantage as concerned to 1G is that with this we could
contact with in the premises of that particular nation, where as in case of 2G the roaming facility
a semi-global facility is available.
2.5 Generation
In between 2G and 3G there is another generation called 2.5G. Firstly, this mid generation was
introduced mainly for involving latest bandwidth technology with addition to the existing 2G
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generation. To be frank but this had not brought out any new evolution and so had not clicked to
as much to that extend.
What is 3G Generation
But to overcome the limitations of 2G and 2.5G the 3G had been introduced. In this 3G Wide
Brand Wireless Network is used with which the clarity increases and gives the perfection as like
that of a real conversation. The data are sent through the technology called Packet Switching
.Voice calls are interpreted through Circuit Switching. It is a highly sophisticated form of
communication that has come up in the last decade.
In addition to verbal communication it includes data services, access to television/video,
categorizing it into triple play service. 3G operates at a range of 2100MHz and has a bandwidth
of 15-20MHz. High speed internet service, video chatting are the assets of 3G.
How is 2G different from 3G?y In comparison to 2G customers will have to pay a relatively high license fee for 3G.
y The network construction and maintenance for 3G is much expensive than 2G.
y From the point of view of customers, expenditure will be excessively high if they make
access to various facets of 3G.
What is Packet Switching
This is actually done by supplying various addressed packets, which will be interconnected to
have the conversation. It is not necessary to create a new dedicated path for sending the data. It
had been modified in such a way that the data can be send through any path; hence, this data
will be received at a less time as compared to that of voice calls.
Packet Switching in Computer networks
The data packs are also used in computer that is when we connected with internet this data pack
helps to download the web pages that is being displayed in the monitor. For a Data Pack it does
not need any separate path for downloading or displaying any objects in the computer or anyother equipment. This is due to the reason that by networking, separate paths are being created
and after analyzing each, the data are being transferred to the correct access point.
3G and 4G Featuress
Main 3G Services
With the help of 3G, we can access many new services too. One such service is the GLOBAL
ROAMING. Another thing to be noted in case of 3G is that Wide Band Voice Channel that is by
this the world has been contracted to a l ittle village because a person can contact with other
person located in any part of the world and can even send messages too. Then the point to be
noted is that 3G gives clarity of voice as well can talk with out any disturbance. Not only these
but also have entertainments such as Fast Communication, Internet, Mobile T.V, Video
Conferencing, Video Calls, Multi Media Messaging Service (MMS), 3D gaming, Multi-Gaming etc
are also available with 3G phones.
Main 4G Features
When It is still to estimate as to how many number of people have moved on from 2G to 3G ,
technology has come up with the latest of its type namely 4G.A successor of 2G and 3G, 4G
promises a downloading speed of 100Mbps and is yet to shower its wonders on. then with the
case of Fourth Generation that is 4G in addition to that of the services of 3G some additional
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features such as Multi-Media Newspapers, also to watch T.V programs with the clarity as to that
of an ordinary T.V. In addition, we can send Data much faster that that of the previous
generations.
What is the reason for delay in implementing 3G and 4G Mobile services?
It is very sad to say that the 3G services had only reached with in some towns of china, so that it
may take time to reach to Other countries. Another major defect of this is that Wide BandFrequency Spectrum, which is needed for 3G, is lacking. Another reason for this is that it a cost
bearing item especially for sending data. So for us it is a higher one which could be used only by
upper classes. If it should be accepted among all customers, firstly it should be availed at a lower
rate, for which the rate of spectrum should be declined.
3G Mobile Phones
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Although originally designed to have EVDO, UMTS eventually emerging as the technology
adopted by all national carriers that already offer 3G access, including the course (now plans to
offer 3G UMTS based on the end of 2007), the TIM, the Hi and even to live, now operate a
network mixed with the UMTS and EVDO.
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As in the case of GSM, which supports the use of GPRS and EDGE, UMTS offers two modes of
access, which are used according to availability, quality of reception and the mode supported by
the device.
The most basic is the WCDMA (not to be confused with CDMA, which is the pattern of rival
GSM), which offers transmission rates up to 384 kbits for both download and to upload.
Although, on paper, the value is close to 236.8 kbits offered by EDGE, WCDMA in practice offersthe very best times of onset and a connection much more usable. A good example of the
difference is the use of VoIP applications, which are almost unusable on EDGE due to the lag in
transmission, but flow in a satisfactory manner in WCDMA.
Then we have HSDPA, a more recent protocol, which reduces latency and increases the rate of
download of the network so expressive. Using the HSDPA as the transport protocol, UMTS
supports rates of 1.8, 3.6, 7.2 and 14.4 megabits in accordance with the implementation used by
the operator (in Brazil the version of 7.2 megabits is the most common). Naturally, the actual
speed varies with the quality of the signal and the number of users connected to the same station
for transmission, but it is always higher than in WCDMA.
The big problem is that HSDPA works well only for relatively short distances, so the devices
automatically switch to WCDMA in the areas of lowest coverage, making the rate of transmission
is reduced. Another limitation is that the only HSDPA increases the rate of download, doing
nothing with the upload, which remains the only 384 kbits, as well as WCDMA.
The HSDPA is considered a 3.5G protocol and (in most devices) you can see which system is
being used simply looking at the icon of the connection. A "3.5G" indicates that you are using the
HSDPA, a "3G" you are using the WCDMA, a "E" you are using the EDGE and a "G" you are in
an area where only the old GPRS is available:
In Nokia, you will notice that the 3.5G icon appears only while the unit is transmitting data. This is
why he really only uses the HSDPA while the connection is active. In the rest of the time, it
switches back to the WCDMA, to save energy, making the icon back to "3G".
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4G iPhone and the World of 4G/LTE Technology
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By SwordSainT
4G iPhone Concept
Although Apple has successfully partnered with AT&T in its release of the three previous
iPhones, there are speculations that the Verizon¶s new LTE technology has put them up to be the
new carrier for the 4G iPhones. Verizon¶s Ivan Seidenberg believes that their Verizon Wireless
Network has a good chance of handling the new 4G iPhone with their new network technology
which is suppose to handle the 4G capabilities.
For those reading about the 4G iPhone, the question comes up: WHAT IS LTE/4G ALL ABOUT?
What is LTE?
LTE means Long Term Evolution. In a nutshell, it would create full IP based mobile
communications and full 4G wireless. It is definitely an evolution as to ± it will take some time for
the technology to develop and perform nationwide. So far it has been tested in Boston and
Seattle.What will 4G change?
Nowadays everyone is screaming ³3G´ with faster downloads and mobile surfing,. 3G was like
the evolution to cable connections from DSL but 3G bandwidth is quickly being yesterday¶s news
as new functions are introduced to the mobile world that demand something faster.
Faster Bandwidth
Picture this: You want to view a video on your iPhone, so you rent it from Netflix online and watch
it streaming to your iPhone at high quality. It¶s an amazing idea but would require a bandwidth
that would definitely strain the 3G capabilities. For 4G; however, this would not be a large
problem as the bandwidths will introduce a new breed of streaming video.
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iPhone hacked to perform video conferencing
S treaming Video
One of these new functions will be streaming video. Many phones such as the HTC Touch Pro2,
LG Cu500v, Samsung Eternity, and a few others already have the capabilities of providing live
video conferencing but do not yet have the network technology to perform them. Does your
phone have a ³Video Share´ function while on a call? Then you already have the possibility of performing this function. 4G/LTE technology will make it so that you can view the person you¶re
speaking to live or what they are viewing (if their phone does not have a camera in the front).
IP Based Phones
The LTE/4G evolution will also create an all IP-based mobile connection which opens a whole
new realm to IP networking functionality. Workers will be able to perform from their companies
servers using the new IP networking combined with faster bandwidth. It will place many mobile
phones in the same realm as small PCs.
If you think 3G has fully utilized the mobile phone, think again. There are so many changes
coming from the 4G/LTE Technology that will revolutionize the mobile industry once again. The
HTC MAX is a great mobile phone thats introducing 4G technology to the mobile industry.