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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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