4G its the fourth generation of the cellular standards, which is also the short form of the fourth generation wireless network which is the next version of the 3G. this technology is in progress.

4G uses orthogonal frequency-division multiplexing (OFDM) instead of time division multiple access (TDMA) or code division multiple access (CDMA) are increasingly marketing their services as being 4G, even when their data speeds are not as fast as the International Telecommunication Union (ITU) specifies. International telecommunication Union says that it is necessary for a mobile device to transmit data at speed of 100 Mbits/sec so that it can be called as a 4G device.

Lets take a look at OFDM (Orthogonal Frequency Division Multiplexing): It states that OFDM split the signal  into several narrowband channels at different frequencies. This is more efficient than TDMA. Whereas in TDMA channel is divided into time slots and has multiple users take turns transmitting bursts or CDMA, which simultaneously transmits multiple signals on the same channel.

Requirements for 4G:

Need to dynamically share and utilize the Network resources.

Easy handover over different networks.

Based on all IP packet switched network.

Ability to offer high quality service.

Scalable channel bandwidth, between 5 and 20 MHz.

4G Technology offers high data rates that will generate new trends for the market and prospects for established as well as for new telecommunication businesses. 4G networks, when tied together with mobile phones with in-built higher resolution digital cameras and also High Definition capabilities will facilitate video blogs. Cellular systems such as 4G allow seamless mobility; thus a file transfer is not interrupted in case a terminal moves from one cell (one base station coverage area) to another, but handover is carried out. The terminal also keeps the same IP address while moving, meaning that a mobile server is reachable as long as it is within the coverage area of any server.


About ameyasworld
I think I'm very shy guy... and too much funny.. I love to increase my friend network but always my nature comes before it ... I love reading books and listening to GOOD music.. I'm a diehard fan/supporter of my Manchester United

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