now let us know something about 4G

now you got a idea what a 4G is now we shall about 4G technically

4G is defined as a network that is spectrum efficient ans that can provide high speed services over air ans offer seamless interoperability,roaming ans real content .it is always on technologically transparent ans affordable with reasonable Q0S and hi

4G is an "ultra high speed wireless network" an information superhighway without cable.
the new network will enable wireless three-dimensional augmented ans virtual reality connection between phone users

4G is "wireless ad hoc peer- to peer networking"

then main defintion of 4G that ITU-R approved in June 2003 sates that the data rate should be around 100Mbps when moving fast (like in a train ) ans 1Gbps when not moving

sounds interesting naa soooo


Lets us proudly welcome the 4G technology for the benefit of human kind

now think about the speed in 4G

4G is defined as telephony at a data rates of 100Mbps globally that is bertween any two points in the world .locally ,1Gbps will be possible

which would be the dream of many people now that the dream is being implemented

about 4G

for the 4G way of communication we need to think out of box

unlike 3G ,which refers to a specific mobile standard and allows the transfer of data at minimum accepted speed ,4G or fourth generation of wireless communication refers to collection of technologies ans standards that will find their way in to range of new ubiquitous computing ans connection systems .in its early stages

4G offers teh promise of allowing users to connect to teh internet and one another thorugh a varity of device asn standards anytime , anywhere and at wide range of speeds, from narrow band to broad band

how is 4G implemented

until now we know that we get more data rate in 4G but how we can we can get by using a special type of communication ie MIMO multiple input and multiple output , we make some changes in base stations and we can implement MIMO its the most efficient way to transfer the data when we need more data rate

sooo..... MIMO is invention made after few inventions it not new soo wat are the old inventions we got which gave rise to a revolution way of communication
think it ............................

now we are going to enter in to 4G

HI finally we have are aiming for 4G you may think that India we didn't even have the 3G why 4G but its very important as the features make us to get into 4G
using 4G access the TV and all GPS(global positioning system) i,e google earth (example) from u r Mobile itself it now u r mobile acts as the remote for u r life in the sense no need to waste the time my siting and browsing the Internet u can access the Internet form u r 4G set itself i am not saying that we do not have the option now but we can have more data rate so that the services are very fast and useful for man kind

soo................. how is 4G implemented now you get a thought
think ............... its same as general mobile communication but......................

1G,2G,3Gand Finally 4G

1G:- First generation

On April 3, 1973, Motorola employee Dr. Martin Cooper placed a call to a rival, Dr. Joel S. Engel, head of research at AT&T's Bell Labs, while walking the streets of New York City talking on the first Motorola DynaTAC prototype in front of reporters. Motorola has a long history of making automotive radio, especially two-way radios for taxicabs and police cruisers.

In 1978, Bell Labs launched a trial of the first commercial cellular network in Chicago using AMPS (Advanced Mobile Phone System), but this network was not approved by the FCC until 1982.

The first commercial launch of cellular telecoms was launched by NET in Tokyo Japan in 1979. In 1981 the NMT system was launched in Denmark, Finland, Norway and Sweden.

The first handheld mobile phone in the US market was the Motorola Dyna 8000X, which received approval in 1983.

2G:- Second Generation

In the 1990s, 'second generation' (2G) mobile phone systems such as GSM, IS-136 ("TDMA"), iDEN and IS-95 ("CDMA") began to be introduced. In 1991 the first GSM network (Radiolinja) opened in Finland. 2G phone systems were characterized by digital circuit switched transmission and the introduction of advanced and fast phone-to-network signaling. In general the frequencies used by 2G systems in Europe were higher than those in America, though with some overlap

• The second generation introduced a new variant to communication, as SMS text messaging became possible, initially on GSM networks and eventually on all digital networks.

• 2G also introduced the ability to consume media content on mobile phones, when Radiolinja (now Elisa) in Finland introduced the downloadable ring tone as paid content.

3G:-Third Generation

Not long after the introduction of 2G networks, projects began to develop third generation (3G) systems. Inevitably there were many different standards with different contenders pushing their own technologies. Quite differently from 2G systems, however, the meaning of 3G has been standardized in the IMT-2000 standardization processing. This process did not standardize on a technology, but rather on a set of requirements (2 Mbit/s maximum data rate indoors, 384 kbit/s outdoors, for example). At that point, the vision of a single unified worldwide standard broke down and several different standards have been introduced.

Finally Now 4G which can attain a very high data rate of 20–40 mbit/s and very efficient QoS provider for all classes of users and many more options

so the now we came finally to 4G

Mobile Phone Generations

As mobile communication has evolved in 1920's but the implementation came to existence form 1946

so as the research work was added new features and QoS of mobile communication has been added
so their are two types of communication

half duplex:A half-duplex system provides for communication in both directions, but only one direction at a time (not simultaneously).

full duplex:A full-duplex, or sometimes double-duplex system, allows communication in both directions, and, unlike half-duplex, allows this to happen simultaneously.

so based on the features added the generations of mobiles has been classified
1G,2G,3G
G:-Generations