WCDMA

7/17/2019 WCDMA

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Department of Communication SystemsLancaster University, UK

Universal Mobile

Telecommunications System

(UMTS)

Prof.G.Markarian

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Overview

• New romise! services

• UMTS" # $istorical overview

• %asic concets

• &ell an! network structure

• 'a!io interface

• Power control an! $an!over

• Ot$er G systems

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UMTS coverae vs. bit rate

•Outdo

ors

•Vehicle

•Walk

•Fixed

•Indoors

•155Mb/s•2.0•0.5

•GSM

•M!S

•"roadband $adio

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UMTS services

• *i!eoconference

• *i!eo streamin

• *i!eo on !eman!

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UMTS services

• +nteractive Ma+nteractive Ma

• ,ocali-ation Service,ocali-ation Service

• Naviation System Naviation System

•

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G Mobile Systems

• New e/citin services" live music0

interactive Meabit web sessions0 vi!eo

conference0 !iital T*

• CDMA2000 (ura!e on +S123%)

• WCDMA (ura!e on GSM)

• TD-SCDMA (in &$ina ura!e on GSM)

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UMTS

• T$e overall ro4ect of 5TS+ relatin to r!

Generation mobile systems is known as t$e

Universal Mobile Telecommunication System(UMTS) w$ile t$e UMTS Terrestrial 'a!io #ccess

Network is calle! UT'#N.

• +t was submitte! to +MT16777 bo!y in 8229.

• +t ensures comatibility wit$ 6G GSM0 +S1230

P:& T:M# tec$noloies0 as well as 6.3G.

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UMTS

• UMTS $as been !eveloe! mainly incountries wit$ GSM networks infrastructure.

• :isa!vantae" new fre;uency ban! re;uire!.• #!vantae" Plenty of new caacity0 $ence

ossibilities for new e/citin services.

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<istorical Overview

• 5arly 8227 = start of researc$ (wit$ 5TS+ fun!e!

ro4ects '#&58>60 &O:+T0 #T:M#)

• ?eb 8226" 899316763M<- an! 688716677M<-allocate! for future UMTS use

• :ec. 822@0 Auric$" establis$ment of UMTS form

• Ban. 82290 Paris" C&:M# wit$ ?::1 an! T::1&:M# selecte! for UMTS oeration

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<istorical Overview

• :ec. 8229" GPP forme! in &oen$aen

• #ril 8222" NTT :o&oMo first sulier of

C&:M# e;uiment for Baan• Ban 6778D :o&oMo launc$e! a trial G service (i1

mo!e). T$ree $one mo!els commercially available

• ?eb. 6773" 5ricsson !emonstrates 2 Mbscommunication wit$ C&:M# an! <S:P#.

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UMTS

AMERICAS

EDGE,WCDMA and

multi-carrier CDMA

in existing bands

currently used by 2G

systems

EUR!E"

IM#-2$$$ band" WCDMAGSM %&$$ band"EDGE

ASIA"IM#-2$$$ band" WCDMA

GSM %&$$ band"EDGE

'REA"

IM#-2$$$ band" WCDMA

(A!A)"IM#-2$$$ band" WCDMA

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?OM#" ?ree!om of Mobile

Multime!ia #ccess

• ?irst commercial G network

• ,aunc$e! by NTT :o&oMo in Oct 6778

• %ase! on an earlier version ('elease22) of t$eUMTS.

• 6G<- fre;uency ban!0 C&:M# wit$ @E kbs(ulink) an! 9E kbs (!ownlink). Ulink @Ekbscircuit inten!e! for real1time services (e..0 vi!eo

conference).• #vailable services" +nternet access0 e1mail0 file

transfers0 fa/in0 tele$ony0 vi!eo conference.

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UMTS" &ell Structure

• :ifferent coverae to !ifferent users. T$ere

are four !ifferent cell structures"

8. picocell (e..0 one office room)

6. microcell (e..0 several buil!ins)

. macrocell (e..0 few kilometers)

E. global cell (covere! by a satellite)

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UMTS" Network Structure

• # basic network structure consists of t$ree

fun!amental comonents"

8. Radio access network (RAN rovi!es access between UMTS an! a mobile user via %S

6. Core network (CN or fi/e! network

resonsible for $an!lin all internal connections

. !ntelligent network (!N = in c$are of billin0

location reistration0 roamin0 $an!over

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Department of Communication Systems

Lancaster University, UK

UMTS" Tec$noloy %e$in!

• Ci!eban! &:M# (C&:M#) wit$ !irect

se;uence srea! sectrum (:S1SS)

• 3M<- ra!io c$annels

• C&:M# simulators are 87 times more

comute1intensive t$an 6G simulators0

$ence increase! cost.

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UMTS" 'a!io +nterface

• UMTS Terrestrial 'a!io #ccess (UT'#) is

wit$ two oeratin mo!es" ?:: F T::

• UT'# ?:: is suitable for suburban areas

wit$ rates u to 9E kbs.

• UT'# T:: works in $ouse$ol!s suitable

for seec$>vi!eo broa!cast wit$ u to6Mbs rate.

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UT'#1?::

• Occuie! fre;uency ban!" 826718297 M<-

(ulink) an! 68871687 M<- (!ownlink)

• 827M<- san between !ownlink an! ulink

• &omle/ erformance control nee!e!

• Minimum fre;uency ban! is 6/3M<-.

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UT'#1T::

• Same carrier fre;uencies are use! for

ulink an! !ownlink.

• &$annel searation is imlemente! by usin

!ifferent srea!in co!es an! time slots

• &ellwise sync$roni-ation is re;uire!0 $ence

suitable for small cells (in!oor).

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UT'#" Secifications

• Ma/imum number of voice c$annels er 6/3M<-" 637 (?::) an!867 (T::)

• *oice co!ec" #M' co!ec

• &$annel co!in" convolutional an! turbo co!es

• 'ake receiver is use!• Mo!ulation" HPSI

• :ata tye" acket an! circuit1switc$e! !ata

• &$i rates" .@9 (?::) an! .9E (T::) Mcs

• ?rame lent$" 87 msec wit$ 83 slots er frame

• 3M<- c$annels wit$ c$annel raster of 677k<-

• <an!over" Soft an! $ar!

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C&:M#

• C&:M# system !eloyment $as reac$e!t$e level w$ere first oerators in 5uroe

$ave launc$e! t$e networks for commercialoeration an! more oerators set to follow.

• &urrently0 t$e main focus s$ifts fromcontrollin t$e ra!io resources to ;ualitymanaement an! service>;uality!ifferentiation.

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C&:M#

• ?ollowin t$e first C&:M# version0'eleaseJ220 bein !eloye!0 t$e ne/t ste in

C&:M# stan!ar!isation evolution $as been

comlete! for imrove! system erformance.

• T$e most sinificant feature comlete! is t$e

<i$ See! :ownlink Packet #ccess (<S:P#)

services0 w$ic$ s$oul! offer see!s u to 91

87Mbs.

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C&:M# '#N #rc$itecture

• T$e use of C&:M# ra!io accesstec$noloy $as s$ae! t$e ra!io access

network ('#N) arc$itecture.• Smoot$ system oeration an! !eloyment

re;uires t$at t$ere are no network locationsw$ere soft $an!over is not ossible betweent$e cells oeratin on t$e same fre;uency as!one wit$ &:M# tec$noloy.

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• Cit$out t$e link e/istin to all base stations0

ower control cannot oerate correctly an! t$e

near1far roblem woul! be intro!uce! in t$eulink.

• T$e followin fiure s$ows t$e basic

C&:M# ra!io access network arc$itecturein!icatin t$e connections for bot$ circuit1

switc$e! an! acket1switc$e! traffic.

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MS

R)C

*G MSC

R)C

*G SGS) GGS)

)+de ,

)+de ,

Iub

Iub

Iu-CS

Iu-!S

Iur

Responsible "or cell control#

e$%i&alent to 'S

Radio Network Controller

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C&:M# '#N +nterface

• T$e interface between t$e base station

(!enote! as Node ' in GPP terminoloy)

an! t$e 'a!io Network &ontroller ('N&) iscalle! +ub.

• T$e interface between two 'N&s is !enote!

as +ur .

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• T$e oen an! stan!ar!i-e! +ur interface is

alrea!y bein !eloye! an! teste! in t$e

multi1ven!or network by many oeratorsan! ven!ors0 t$us ensurin t$e soft

$an!over functionality in multi1ven!or

environment as well.

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• T$e Mobile Switc$in &enter (G MS&)

$as basically t$e same functionality as wit$

GSM networks to switc$ t$e &ircuitSwitc$e! (&S) transactions.

• T$e Servin GP'S Suort No!e (SGSN)

erforms t$e similar functions to PacketSwitc$e! (PS) services.

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C&:M# ,oical0 Transort an!

P$ysical &$annels

• T$e c$annel structure for C&:M# consists

of loical0 transort0 an! $ysical c$annels.

• T$is structure is relate! to t$e UMTS

rotocol arc$itecture !efine! in GPP0 TSG

'#N 63.78.

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UT'# ?:: Protocol #rc$itecture

',&

',&

',&

',&

',&

',&

MC

!DC!

!ysical .ayer

MAC

#rans/+rt Cannels

RRC

.+gical Cannels

.20MAC

.%

.20R.C

.20MC

.20!DC!

User !laneC+ntr+l !lane

.*

C + n t r + l

C + n t r + l

C + n t r + l

C + n t r + l

C + n t r + l

Radio link control

Radio reso%rce control

Data con&ergence protocol

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Iey C&:M# P$ysical Parameters

Physical layer parameter Alternatives

Chip rate 3.84 Mc s

Carrier spacing (nominal) 5 MHz

Carrier raster 200 kHz

Modulation uplink/downlink Dual-channel QPSK/ QPSK

Channel coding Convolutional or Turbo coding

Frame length 10 ms

Interleaving length 10, 20, 40 or 80 ms

Spreading factorsuplink/downlink

4-256/4-512

Power control command rate 1500 Hz

User data rate with1/2

rate coding0-2.8 Mbps (terminal capability)

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Srea!in &o!es

• Ort$oonal *ariable Srea!in ?actor

(O*S?) co!es are use!.

• Number of available O*S? co!es is e/actlye;ual to t$e srea!in factor.

• T$ey can be comletely ort$oonal if t$ey

oerate in e/actly sync$roni-e! c$annels.

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Srea!in

• Kou can calculate t$e bit rate for a c$annel

as"

'it rate c)ip rate *spreading "actor

• T$e followin table s$ows t$e srea!in

factors use! for !ifferent bit rates.

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•Orthogonal Variable Spreading Factor

•c•E08• L (8080808)

•c•608• L (808)

•c•E06• L (808018018)

•c•E0 • L (801808018)•c•606 • L (8018)

•c•E0E • L (801801808)

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Srea!in

User it Rate1b/s3

S/reading 4act+r Ci/ Rate 1Mc/s3

7 869 .9E

@7 @E .9E

867 6 .9E

6E7 8@ .9E

E97 9 .9E

2@7 E .9E

8267 6 .9E

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:ownlink Mo!ulation" HPSI

D!DC50D!CC5 S →

! Cc

I

6

S/reading Se7uence

-%89 %89-$89 $89

-%89

-$89

$89

%89

6

I

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&ells

• # cellular network is re;uire! to ensure t$e

G can rovi!e a $i$ caacity network.

• #s wit$ any cellular system0 t$e totalcaacity of t$e network is !een!ent on t$e

si-e of t$e cells use!.

• T$e smaller t$e cells are ma!e0 t$e larert$e total caacity.

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&ells

• <owever0 t$e cell si-e is limite! by t$e

amount of infrastructure t$at can be set1u.

• T$e cell si-e also !etermines t$e ma/imumc$annel caacity for eac$ cell0 as

roaation effects suc$ as multiat$ an!

fa!in force lare cells to $ave a lower !atarate.

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&ells

• ,are cells also $ave to service a lare

number of users0 an! since t$e cell caacity

is aro/imately fi/e!0 eac$ user can only$ave a re!uce! !ata rate wit$ resect to a

smaller cell.

• +n or!er to otimi-e t$e cellular networkfour cell tyes are use!.

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&ell Tyes

• T$ese are t$e icocell0 microcell0 macrocell0

an! lobal cell.

• T$ese cell tyes tra!e off cell si-e wit$ totalcaacity an! services.

• T$e followin table s$ows t$e t$ree cell

tyes use! in t$e G system an! some oft$e cell c$aracteristics.

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&ells

Pico-cell Micro-cell Macro-cell

Cell radius <100m <1000m <20km

Antenna Ceiling/wall

mounted

Below roof top height Roof top mounting

Max. multipath dela

spread

1use! "use! 20use!

Appli!ations and

en#ironments

$ndoor/%utdoor

&ithin 'uildings

Cit !entres (o!al high 'it rate

)igh densit outdoor

Business *indoor+

,ixed *%utdoor+ $nner !it areas

(ow densit areas

-u'ur'an areas

r'an areas ,ixed *outdoor+

-er#i!es and data

rate supported

All ser#i!es *up to

2M'ps+

p to k'ps (imited su'set

*up to 1kp's+

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'a!io 'esource Manaement

• 'a!io 'esource Manaement (''M)consists of all functionalities t$at are

$an!lin t$e air interface resources of ara!io access network.• T$ese functions toet$er are resonsible for

sulyin otimum coverae0 offerin t$e

ma/imum lanne! caacity0 uaranteeint$e re;uire! HoS0 an! ensurin efficient useof $ysical an! transort resources.

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'a!io 'esource Manaement

• ''M consists of ower control (P&)0 $an!over

control (<&)0 conestion control (&&).

• && is tyically sub!ivi!e! into a!mission control(#&)0 loa! control (,&)0 an! acket !ata

sc$e!ulin an! t$e resource manaer ('M).

• T$e actual ''M alorit$ms are not stan!ar!i-e!

an! are sub4ect to in!ivi!ual interretation.

“N f bl ”

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• “Near-far problem”

• la,

la

•%l

a0%l

a

• MSs closer to BSmay create too muchinterference.

• Requirements: fastpower control in MS

• Taret: all MSs are

recei!e" at the BSwith the same power

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Near1far roblem

The uplink issue

•:8 •:6

•:8 :6

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''M" Power &ontrol

• Prevent near1far effect

• Maintain t$e link ;uality in ulink an! in

!ownlink by controllin t$e transmission owers

• Minimi-e effects of fast an! slow fa!in

• Minimi-e interference in network an! $ence

ma/imi-es t$e number of connections t$at can be

serve! wit$ t$e re;uire! Huality of (HoS)• # secon!ary a!vantae is0 t$at t$e battery

consumtion of t$e MS is minimise!.

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''M" Power &ontrol

• ?or t$e C&:M# stan!ar!0 t$e owercontrol is alie! in bot$ ulink an! in

!ownlink.• C$en t$e MS initiates a call0 it a!4usts its

transmission ower base! on t$e receive! ilot sinal ower.

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''M" Power &ontrol

• T$e ilot sinal is a cell secific sinal

broa!cast in every cell wit$ constant ower.

• +t rovi!es a rou$ measure of t$e roaation loss between t$e MS an! t$e

%S.

• T$e stroner t$e receive! ilot sinal oweris0 t$e less transmission ower is nee!e!.

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''M" Power &ontrol

• T$is tye of initial ower a!4ustment is

arrane! by open-loop power control.

• T$e rocess $as to be suorte! by a rioriinformation w$ic$ mobile receives.

• To set u a connection also ot$er control

c$annels are re;uire! to be use!.

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''M" Power &ontrol

• T$e variations in t$e multiat$ c$annel may

cause t$at a fi/e! taret S+' value cannot

always uarantee a satisfactory bit errorrate.

• T$erefore t$e taret must be controlle!

base! on t$e ac$ieve! bit error rate or frameerror rate.

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''M" Power &ontrol

• +f t$e error rate is too $i$0 t$e taret isincrease! until t$e !esire! error rate is met.

• +ncreasin t$e taret for t$e ulink causest$e oen1loo ower control to lift t$etransmit ower of MS until t$e new taret isreac$e!.

• T$e controllin of t$e S+' taret is name!o%ter-loop power control .

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''M" Power &ontrol

• Outer1loo ower control can"

8). &omensate c$anes in t$e environmentD

6). #!4ust t$e S+' taret to ac$ieve t$e

re;uire! bit error rateD

). :een!s on MS mobility an! multiat$

!iversity.

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''M" Power &ontrol

• T$e wi!eban! sinal in ulink an! !ownlink is

often sub4ect to fast fa!in.

• T$us0 an a!!itional mec$anism calle! closed-loop(inner-loop power control is nee!e!.

• +n close!1loo ower control0 t$e transmitte!

ower of t$e MS is a!4uste! base! on t$e receive!

ower measurement at t$e %S.

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''M" Power &ontrol

• %S comares t$e receive! enery er bit to

interference enery ratio 5 b>+o to a taret

value an! comman!s t$e MS to increase or!ecrease its ower accor!inly.

• T$e same rocess is erforme! in t$e

!ownlink !irection.

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&lose! ,oo Power &ontrol

1C0I3:1C0I3t

R;

#; D!CC5

R;

R;

#;

<ES

)Decrease by !#xc

Increase by !#xc

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''M" Power &ontrol

• <ence0 close!1loo ower control mitiates

fast fa!in0 functions in bot$ !ownlink an!

ulink !irection0 an! works base! on afi/e! ;uality taret set in mobile station or

base station (for !ownlink an! ulink0

resectively).

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''M" <an!over &ontrol

• <an!over (<O) control is a cell reselection

rocess0 w$en an MS moves away from t$ecell un!er t$e control of one %S to anot$er.

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• T$e <an!over &ontrol of C&:M#

suorts !ifferent tyes of $an!overs an!

$an!over roce!ures.• T$e <O can be !ivi!e! into t$e followin

$an!over tyes"

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• Intra-system HO is occurrin wit$in a

C&:M# system. +t can be furt$er

sub!ivi!e! into Intra-frequency HO0 between cells belonin to t$e same

C&:M# carrier0 an! Inter-frequency HO0

between cells oerate! on !ifferentC&:M# carriers.

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• Inter-system HO is takin lace between

cells belonin to two !ifferent ra!io access

tec$noloies ('#T) or !ifferent ra!io accessmo!es0 like ?::1C&:M# to T::1

C&:M#. T$e most fre;uent case for t$e

first tye is e/ecte! between C&:M# an!GSM>5:G5 systems.

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• T$e followin <O roce!ures can bei!entifie!"

• Hard handover (HHO), a cateory of <O roce!ures0 w$ere all ol! ra!io links an MSis usin are release! before t$e new ra!iolinks are establis$e!. ?or real1time bearers

it means a s$ort !isconnection of t$e bearer0for nonreal1time bearers <<O is lossless.

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• Soft Handover (SHO) is a cateory of <O

roce!ures w$ere an MS always kees at

least one ra!io link to t$e UT'#N. :urinS<O an MS is sim%ltaneo%sl+ controlle! by

two or more cells belonin to !ifferent %Ss

of t$e same 'N& (intra1'N& S<O) or!ifferent 'N&s (inter1'N& S<O).

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Soft1<an!over

• simultaneous ra!io

link between MS an!

!ifferent %TSs

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Soft1<an!over • #!vantaes

= S<O ain at cell bor!er

= Macro!iversity

= 'e!uce! T/ ower ()

• :isa!vantaes

= &o!e waste

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•Cell A •Cell B

•Cell C

•Signal

•margin

•Soft handover•region

•ADD threshold

•DROPthreshold

•Time margin

•Ec/No

•Time

Macro!iversity 1 active set

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''M" Soft <an!over &ontrol

• S<O is a eneral feature in systems like

C&:M#0 w$ere nei$borin cells are

oerate! on t$e same fre;uency.• C$en in connecte! mo!e0 t$e MS

continuously measures servin an!

nei$borin cells (cells in!icate! by t$e'N&) on t$e current carrier fre;uency.

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• T$e MS comares t$e measurement results

wit$ <O t$res$ol!s rovi!e! by t$e 'N&0

an! sen!s a measurement reort back to t$e'N& w$en t$e reortin criteria are

fulfille!.

• S<O t$erefore is a mobile evaluate!$an!over.

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• T$e !ecision alorit$m of S<O is locate! in

t$e 'N&.

• %ase! on t$e measurement reort receive!from t$e mobile0 t$e 'N& or!ers t$e MS to

a!! or remove cells from its active set.

• S<O is ossible only on t$e same carrier.

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''M" <ar! <an!over &ontrol

• <<O means t$at +?1<O causes temorary!isconnection of t$e ra!io access bearer an!

is lossless for nonreal1time bearers.• +?1<O also enables <Os between searate

layers of a multi1layere! cellular network0for e/amle0 a network consistin of

macrocell an! microcell0 w$ere t$e celllayers are usin !ifferent carriers.

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Macr+ cell

Micr+ cells

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• T$e <& of t$e '#N s$oul! suort

followin tyes of +?1<O"

• !ntra-'TS )ard )ando&er (to control loadbetween carriers

• !ntra-RNC )ard )ando&er

• !nter-RNC )ard )ando&er

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• +nter1system $an!over (+S1<O) is a

$an!over between (?::1) C&:M# an! a

nei$bourin system usin a !ifferent ra!ioaccess tec$ni;ue ('#T) or also wit$in

C&:M# if t$e ot$er system uses a

!ifferent ra!io access met$o!0 i.e.0 T::1C&:M#

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• +S1<O is re;uire! to comlement t$e coverae

areas of C&:M# an! a nei$bourin system0

w$en t$e coverae area of C&:M# is limite!.

• C$en t$e coverae areas of C&:M# an! t$e

nei$bourin system overla an +S1<O can

also be use! to control t$e loa! between t$e

systems.

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• ?or e/amle0 seec$ connections can be

$an!e! over to a nei$bourin 6G system

an! !ata connections can be $an!le! wit$int$e C&:M# system.

• +S1<O is a $ar! $an!over0 t$at is0 an +S1<O

causes temorary !isconnection of t$e ra!ioaccess bearer.

H S + ki

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HoS +nter1workin

GPP secification work rovi!es smoot$ inter1workin wit$ t$eGSM>5:G5 networks

inclu!in common corenetwork0 multimo!eterminals0 inter1system$an!overs an! $armoni-e!

HoS arameters.

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&onestion &ontrol

• +n C&:M# it is imortant to kee t$e airinterface loa! un!er re!efine! t$res$ol!sin or!er to meet t$e HoS tarets.

• T$ree !ifferent functionalities are art oft$e conestion control"

• Admission control (AC) $an!lin all new

incomin traffic. +t is c$eckin0 w$et$er anew acket can be a!mitte! to t$e system.

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&onestion &ontrol

• Packet schedulin w$ic$ is $an!lin all t$enonreal1time traffic. %asically0 a acketsc$e!uler is !eterminin t$e time a ackettransmission is initiate! an! w$ic$ bit rate isuse!.

• !oad control, takin care of t$e situation t$at

system loa! $as e/cee!e! t$e t$res$ol!(s) an!correson!in counter measures.

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HoS Mec$anisms

• +n t$e conte/t of UMTS networks0 Huality of

Service (HoS) refers to t$e collective effect of

service erformances t$at !etermine t$e !eree of

satisfaction of t$e en!1user of t$e service.

• T$e HoS arc$itecture consists of all t$e UMTS

network functions t$at articiate in rovi!in t$e

en!1user t$e aroriate service ;uality.

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HoS Mec$anisms

• T$e UMTS bearer services are cateori-e!

into four traffic classes as s$own in

followin table.• T$e main !istinuis$in factor between

t$ese classes is t$e !elay sensitiveness of

t$e e/ecte! traffic.

$ i

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HoS Mec$anisms

#RA44ICC.ASS

C)=ERSA#I)A.C.ASS 1R#3

S#REAMI)GC.ASS 1R#3

&$aracteristics ,ow !elay

Preserves time relation between ackets

Preserves timerelation between

ackets

Tyical#lications

*oice0 $i$ly intensiveames

Streamin me!ia

H S M $ i

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HoS Mec$anisms

#RA44ICC.ASS

I)#ERAC#I=EC.ASS

AC'GRU)DC.ASS

&$aracteristics 'e;uest resonse attern

Preserves !atainterity

%est effort

Non1time critical !ata

Preserves !atainterity

Tyical#lications

Ceb browsin %ackroun!sync$ronisation0!ownloa!s0etc

C&:M# '#N 5 l ti

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C&:M# '#N 5volution

• Release , UMTS secifications contain!ownlink acket !ata oeration

en$ancement0 $i$1see! !ownlink acketaccess (<S:P#) w$ic$ utili-es +brid AR./ $i$er or!er mo!ulation an! No!e %(%S) sc$e!ulin for imrovin !ownlink

!ata sectral efficiency an! for us$in bitrates beyon! 87 Mbs.

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C&:M# '#N 5volution

• C&:M# evolution for Release an!

furt$er releases is continuin wit$ t$e

followin key areas bein worke! in GPPstan!ar!isation"

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C&:M# '#N 5volution

• 1n)anced %plink dedicated c)annel

• Suort for M%ltimedia 'roadcast and

M%lticast Ser&ice (M'MS

• Distrib%ted arc)itect%re otion t$at coul!

enable more efficient use of +P tec$noloy

G Systems" &omarison

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G Systems" &omarisonParametersParameters &:M#6777&:M#6777 C&:M#C&:M# T:1S&:M#T:1S&:M#

M%ltiple Access :S1&:M# :S1&:M# T:M#>:S1&:M#

C)annel coding &onvolutional orturbo co!es

&onvolutional0 orturbo

&onvolutional0 orturbo

Spreading codes Cals$ O*S? O*S?

Mod%lation HPSI HPSI HPSI>9PSI

'andwidt) 8.63Q6>.3Q6 M<- 3Q6M<- 8.@ M<-

C)ip rate 8.6699>.@9Mcs .9E Mcs 8.69 Mcs

rame lengt) 67ms0 3ms 87 ms 87 ms

Ma3im%m datarate

6.E Mbs 6 Mbs 6 Mbs

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Summary

• UMTS is still in !eveloin $ase

• Some features $ave been imlemente!0 some are

still to come.• +s market t$ereR

• ?urt$er stu!y" c!ma6777

• ?urt$er stu!y" +P Multime!ia Subsystem (+MS)

Documents

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