Guru Tegh Bahadur Institute of

Technology

BY•TALVINDER SINGH

Enrollment no.

•04013202810

Class

•ECE 1

4G WIRELESS SYSTEM

The way in which the companies are developing their networks is problematic — all are currently preceding in different directions with their technology improvements.

3G systems still have inherent flaws. They are not well-designed for data; they are improvements on a protocol.

A data-centered protocol is needed. If one were to create two identical marketplaces in which cellular providers used 3G and 4G respectively was originally designed for voice.

Problems with the Current System

Consumers demand more from their technology. Whether it be a television, cellular phone, or refrigerator, the latest technology purchase must have new features. With the advent of the Internet, the most-wanted feature is better, faster access to information. Cellular subscribers pay extra on top of their basic bills for such features as instant messaging, stock quotes, and even Internet access right on their phones. But that is far from the limit of features; manufacturers entice customers to buy new phones with photo and even video capability. It is no longer a quantum leap to envision a time when access to all necessary information the power of a personal computer, sits in the palm of one’s hand. To support such a powerful system, we need pervasive, high-speed wireless connectivity.

Need of 4G

4G , an acronym for fourth generation system, is a term used to describe the next step in wireless communication.

A 4G system will be able to provide a comprehensive IP solution where voice data and streamed multimedia can be given to users on an “Anytime, Anywhere” basis and at higher data rates than previous generation.

4G will be fully IP based integartion system, will be capable of providing between 100 Mbit/s with premium quality and high security.

Increased speed is a crucial requirement for 4G . Data rate increased by 10 to 50 times over 3G will put streaming audio and video access into the hands of the consumers.

An Insight into 4G

EVOLUTION

*Interactive multimedia Voice & Video streaming*High speed global internet access*Service portability with scalable mobile services*High capacity & low cost services*Improved information security*Spectral Bandwidth efficiency

Better coding techniques like concatenated FEC coding is used in order to improve network performance and send much large blocks of data while reducing bit-error rate.

Goals of 4G

Whats new in 4G

3G wireless Unifies existing cellular

standards Circuit switched & packet

switched Features include:- -phone calls -Global roaming -Send/ receive large data - High speed web navigation/maps -Video conferencing -Tv streaming -Speed: 144kb/s- 2Mb/s

4G wireless Packet switching only Interleaved FDMA. *Features include -phone calls -Global roaming Send/ receive large data -Extremely high speed(10-50x>3G) -Real time audio -Ip based integration system -HDTV streaming -speed : 100 Mb/s-1Gb/s

In the 1st generation wireless standards used plain TDMA but it proved to be less efficient in handling the high data rate channels.

In the 2nd generation system, the combination of FDMA and TDMA was used.

Increased data rate and efficiency to handle the multipath channel , anabled the 3rd generation systemsr to use CDMA as the Access scheme.

New access scheme like interleaved FDMA and multi carrier code division multiple access(MC-CDMA) are gaining more importance

IFDMA provides less power fluctuation and thus avoids amplifier issues.

ACCESS SCHEMES OF 4G

4G will be based on packet switching only. This will require low latency data transmission.

4G generation wireless will support IPV6 which is an important network layer technology thatcan support a large number of wireless enabled devices.

By increasing the number of ip addresses , IPV6 removes the need for Network address translation(NAT)

With the available address space and number of addressing bits in IPV6, many innovative coding schemes can be developed for 4G devices.

IPV6

The vision for the future development of 4G is that there will be a steady & continuos evolution.

In conjunction with the future development of 4G there may be an inter-relationship with other radio system.

In the future wireless service provisions will be characterised by global mobile access, high quality of service and easy and simple access to multimedia services for voice, data, www, GPS etc via one user terminal.

Future development

4G in public safety

Sensors in public vehicle

Cameras in traffic light

First responder route selection

Traffic control during disasters

Other Applications

China has already decided to move to 4G network, since there was many problem in allocating 3G spectrum to telecom networks and in setting up 3G mobile network at high costs.

We are lucky in india that our network particularly that of the incumbent and IP2 licenses like railways, power grid, electricity boards etc have connected about 30,000 exchanges by Optical fiber.

These fiber ends can then be connected to all villages by free spectrum available and all villages can be connected for delivery of voice telephony, broadband, TV, e-governance, e-education,e-agriculture etc.

India moving to 4G networks

The fourth generation promises to fulfil the goal of PCC(Personal computing & communication)- a vision that affordably provides high data rates everywhere over a wireless network.

4G provides with a very efficient wireless communication system for seamless roaming over various network including internet which uses IP network.

It will dominate the wireless communication, and its converged system system will replace most conventional wireless infrastructure.

Conclusion

THANK YOU