4g Seminar Presentation

8/2/2019 4g Seminar Presentation

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5

WIRELESS SYSTEM


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CONTENTS

A BRIEF VIEW

WHAT IS 4G????

3G VS 4G

OBJECTIVE OF 4G IP V6 SUPPORTS

BENEFITS OF 4G

CONCLUSION


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Generation refers change in nature of Service compatible

transmission technology and new frequency bands.

1G systems used analog frequency modulation.

2G systems use digital communication techniques with

TDM, FDM, CDMA.

3G systems offer higher data rates and voice and paging

services to provide interactive multimedia includingteleconferencing and internet access.

4G aims to provide IP telephony, ultra-broadband Internet

access, gaming services.

A BRIEF VIEW


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WHAT IS 4G ???

4G refers to the fourth generation of cellular wireless standards

4G is a packet switched wireless system with wide area coverage andhigh throughput.

4G wireless uses OFDM and millimeter wireless that enables data rateof 20 mbps and frequency band of 2-8 GHz.

4G is going to be a packed based network.

4G provide an end-to-end IP solution where voice and data is goingto be served to users.


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3G Vs 4G

The following table shows comparisons between

3G and possible 4G systems.

3G 4G

Frequency Band 1.8 - 2.5 GHz 2 - 8 GHz

Bandwidth 5-20 MHz 5-20 MHzData rate Up to 2Mbps Up to 20 Mbps

Access Wideband CDMA Multi-carrier -

CDMA or

OFDM(TDMA)

Switching Circuit/Packet

Packet

Mobile top speeds 200 kmph 200 kmph


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OBJECTIVES OF 4G

4G being developed to accommodate QoS rate

requirements set by further development of existing

3G applications.

Flexible channel bandwidth between 5 and 20MHz,optionally up to 40MHz.

Data rate of at list 100Mb/s between any two points

in the world.

Increase system spectral efficiency of up to

3bit/s/Hz/cell in the downlink and 2.25bit/s/Hz/cell

for indoor usage.


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IPv6 SUPPORT

Unlike 3G, based on two parallel infrastructure circuit

switched and packet switched network nodes, 4G will be

based on packet switching only. This will require low-

latency data transmission.

IPv6 support large number of wireless enabled devices.

By increasing the number of IP addresses, IPv6 removes

the need for NAT (Network Address Translation).


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BENEFITS OF 4G

High speed, high capacity, and low cost per bit.

Support interactive multimedia, voice, streaming

video, Internet, and other broadband services.

Global access, service portability, and scalablemobile services.

Better scheduling and call admission control

techniques. Smooth handoff across heterogeneous networks.


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BENEFITS OF 4G

High quality of service for next generation

multimedia support (real time audio, high speed

data, HDTV video content, mobile TV, etc.)

Interoperability with existing wireless standards.

In addition to improvements in the multiplexing

systems, improved modulation techniques are

being used. Whereas earlier standards largelyused Phase-shift keying, more efficient systems

such as QAM are being proposed for use with

the 3GPP Long Term Evolution standards.
http://en.wikipedia.org/wiki/QAMhttp://en.wikipedia.org/wiki/QAM


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CONCLUSION

Migration to 4G networks ensuresconvergence of networks, technologies,applications and services.

4G can serve as a flexible platform. Wireless carriers have an opportunity to

shorten Investment return, improve operatingefficiency and increase revenues.

4G - a promising Generation of wirelesscommunication that will change peoples lives.


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4g Seminar Presentation

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