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7 Oct 2017

4G Technology


4G Technology Training Institute

4G Technology Training Institute – Fourth Generation Mobile System” and successor of 3G, 2G, and 1G mobile technologies is here to replace the 3G systems.  Most of the users are getting very high speed Internet connections at homes, offices, super markets and restaurants but when they are outside of these places they are unable to get those high speed connections. Now with the help of 4G you can get secure high speed internet access on the go.

1G which was widely used in cell phones and only allows the phone calls. Then 2G was introduced digital mobile communication that combined calling and texting only. Then came 3G finally the internet went mobile, with the simple mobile device you can send mails, read the newspaper, check your favorite social media and many more things. 4G will enhance the security measures and increase efficiency for users. It will also reduce the difficulties in transmission when a user moves from one network to another network.4G technology will use the network based IP address system same as used for internet.

4G Technology Training Institute

Now we will discuss about the technologies that are being used in 4G network. The technologies used in 4G are · OFDM · MIMO · IPv6 (Internet protocol version 6) · VoIP (Voice Over IP) · Ultra Wide Radio Band (UWB) · QOS(Quality of service) · SDR(Software Defined Ratio).

OFDM is abbreviation of orthogonal frequency-division multiplexing. It’s a method of encoding digital data on multiple carrier frequencies. In this way Single channel utilizes multiple sub- carriers on adjacent frequencies. Sub-carriers in an OFDM system are precisely orthogonal to one another thus they are able to overlap without interfering. OFDM allows transfer of more data than other forms of multiplexing (time, frequency, code, etc.). Another technology used in 4G is known as MIMO. It is abbreviation of “Multiple input and multiple output”. It is the use of multiple antennas at both the transmitter and receiver to improve communication performance. Before MIMO there SISO (Single input single output), SIMO (single input single output) and MISO (Multiple input Multiple Output).MIMO is the improved version in which there are multiple antenna instead of one on both transmitting and receiving end. MIMO helps to reduce effects of fading signals due to use of multiple antenna at receiving end, Higher downloads, more Mbps with exiting spectrum and power. MIMO also helps to reduce breaks in call and data.

IPv6 is also used in 4G. IPv6 is upgraded version of previously used IPv4. IPv6 helps in easier management of network because it has auto configuration capabilities, it is simpler and more manageable. IPv4 has 4 octets for address while IPv6 has 16 octets for address. Direct addressing is possible in IPv6 due to vast address space. IPv4 addresses were not enough for the complete world but IPv6 has abundance of addresses (3.4 x 1038).IPv6 Provides interoperability and mobility capabilities. Security features are also improved in IPv6.

Another technology used in 4G is VoIP which is the abbreviation of “Voice over internet protocol”. With the help of VoIP we can make calls over IP-based data networks with a great quality and less cost. With the help of VoIP we can make call PC to PC and phone to phone (via internet) at much less cost. With the help of VoIP integration of voice and data is possible. It gives us more bandwidth and cost reduction. Then we have QOS (Quality of service), it is the idea that data transmission rate, error rates, and other characteristics can be measured can be measured and improved. It is important for new internet applications. It helps in prioritization of network traffic. SDR is also used in 4G. It is the short form of “Software defined radio”. SDR helps in software upgrading of commercial radios. As the hardware implemented by the means of software so a generic hardware can be used for many applications. It will reduce cost of new prototypes because software prototyping is faster and cheaper as compared to hardware prototyping.

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