his LTE tutorial covers LTE system overview, LTE air
interface,LTE SAE and provide link for LTE Frame structure, LTE
physical layer,LTE protocol stack,LTE terminologies,LTE
advanced,LTE vendors etc.LTE OverviewLTE standard has een pulished
y !"## as an e$tension of %&TS'ased on !"## standard(
and)$E*+,O'ase on !"##- standard( technologies. LTE is mainly
designed for high speed data applications oth in the uplink and
downlink. LTE network offers aout !..&ps data rate in the
downlink and aout /0 &ps in the uplink. There is possiility of
supporting voice over LTE'*oLTE( in the future. There are various
methods under progress to support *oLTE some of them includes *O1#,
legacy fallack to previous e$isting wireless networks.This tutorial
on LTE covers following in addition to LTE air interface and LTE
system architecture2LTE Air interfaceThe Air interface etween LTE
network and %E supports high data rate owing to OF,& and
&ultiple antenna techni3ues employed. OF,&A is used from
network to %E air interface and S4+F,&A is used from %E to
network air interface. 5efer following links to know OF,&A
asics.OF,&A Types OF,& versus OF,&A OF,&A #hysical
layerLTE System Architecture Evolution As shown in the figure LTE
SAE'System Architecture Evolution( consists %E,e6ode7 and
E#4'evolved packet core(. *arious interfaces are designed etween
these entities which include %u etween %E and e6ode7, 8- etween two
e6ode7, S) etween E#4 and e6ode7. e6ode7 has functionalities of oth
564 and 6ode7 as per previous %&TS architecture.LTE is
completely 1# ased network.The asic architecture contains the
following network elements.). LTE E%T5A6 'Evolved %niversal
Terrestrial 5adio(-. LTE Evolved #acket 4ore.LTE E%T5A61t is a
radio access network standard meant to e a replacement of the
%&TS, 9S,#A and 9S%#A . %nlike 9S#A, LTE:s E+%T5A is an
entirely new air interface system. 1t provides higher data rates,
lower latency and is optimi;ed for packet data. E%T5A6 'Evolved
%niversal Terrestrial 5adio( consists of e67 '7ase station(. E%T5A6
is responsile for complete radio management in LTE.
