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LongTermEvolution

overviewMade by: Mehdi MARRAHA

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ummary

Introduction 

I.Radio mobile technologies evolutionII. LTE Long Term Evolution

. Introduction!. LTE features". LTE network achitecture#. Physical layer

5. Conclusion

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Introduction

LTE (LongTerm Evolution ! commonly marketed as "#$ is a standar

d for wireless communication of highs%eed data for mobile %h

ones and data terminals& It is based on the # 'E)#E and *'T

  + P, network technologies! increasing the ca%acity and s%eed

using a different radio interface together with core network im%

rovements&

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I& Radio mobile technologies evolution

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II& LTE Long Term Evolution

1. Introduction-

•. Long Term Evolution (LTE$ is a %ro.ect develo%ed by /#PP and aims toanswer the increasing demand in term of services of mobile communication&

•. Standardi0ed starting Rel 1•. LTE,dvanced Standardi0ed starting Rel23 !assures backward com%ati

bility with LTE& ,ssures much higher through%ut using new key techni4ues within the R5 %art&

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6& LTE features

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/& LTE network architecture

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LTE architecture

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LTE 7etwork Elements-

Evolved 7ode 8 (e78$

• Su%%orts air interface• Provides radio resource management functions

  erving #ateway ( #9$

•

Provides 'obility• Res%onsible for Routing and 5orwarding %ackets

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Packet )ata 7etwork #ateway (P)7 #9$

• Provides connectivity to Internet• Provides :oS and mobility between /# and non/# networks

'obility 'anagement Entity (''E$

• 'anages mobility and %rovides security• ;%erates in control %lane and %rovides user authentication• 'anages +andover and signaling

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Transmission chain -

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"& Physical layer

Physical layer details

• The Layer 2 is defined in a bandwidth agnostic way! allowing the LTE Layer 2 to ada%t to various s%ectrum allocations&

• The generic radio frame for 5)) and T)) has a duration of 23ms and consists of 63 slots with a slot duration of 3&<ms& Two ad.acent slots form one subframe of length 2ms& , resource block s%ans either 26 subcarriers with a subcarrier bandwidth of

2<k+0 or 6" subcarriers with a subcarrier bandwidth of =&<k+0 each over a slot duration of 3&<ms&

• ,n additional framing is defined for T)) owing backward com%atibility with T) SC)',

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Resource 8loc (R8$ structure *L)L -

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Channel ma%%ing

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Conclusion

This %resentation gives a general idea on lte! waiting in the ne>t %resenta

tion more details on LTE %rinci%als and 'ain features- access and tran

smision techni4ues (T))! 5))! ;5)',! SC5)',! 'I';$ and Self;rg

anising 7etworks (S;7 ,7R! S;7'L8! S;7'R;$

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