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 Overview LTE standard has been published by 3GPP as an extension of UMTS(based on 3GPP standard) and 1xEV-DO(base on 3GPP2 standard) technologies. LTE is mainly designed for high speed data applications both in the uplink and downlink. LTE network offers about 300Mbps data rate in the downlink and about 75 Mbps in the uplink. There is possibility of supporting voice over LTE(VoLTE) in the future. There are various methods under progress to support VoLTE some of them includes VOIP, legacy fallback to previous existing wireless networks. This tutorial on LTE covers following in addition to LTE air interface and LTE system architecture: LTE Air interface The Air interface between LTE network and UE supports high data rate owing to OFDM and Multiple antenna techniques employed. OFDMA is used from network to UE air interface and SC-FDMA is used from UE to network air interface. Refer following links to know OFDMA basics. OFDMA Types OFDM versus OFDMA OFDMA Physical layer LTE System Architecture Evolution
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.
