docslide-net_umts-explained.pptx

8/9/2019 docslide-net_umts-explained.pptx

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UMTS(Universal Mobile Telecommucation System)Overview

Features-High quality Speech ( Wideband speech) A new wideband AMR (Adaptive Multi-Rate) codec to increase the qualityo speech over !M"S#

High Speed $ac%et Access With HSDPA(high speed downlin% pac%et access) and HSUPA(high speed uplin%

pac%et access) a pea% data rate o &'#Mbitsec in the download direction# *urther i+prove+ents to the radio networ%

and user devices will be able to oer user pea% rates in the download direction o ,#Mbitsec#

Handover to .SM.$RS /oice calls and data traic can be transerred between .SM and !M"S sea+lessly#

Multi+edia Messaging Service (MMS) 0t allows the transer o +ulti+edia +essages between users without the

require+ent or the +ulti+edia +essages to be transerred in real-ti+e#Multi+edia "elephony or 0MS "his uses 0MS to oer telephony services such as video1 te2t1 picture sharing1 video

clip sharing etc#

0$-based +ulti+edia core networ% subsyste+ (0MS) "his provides support or 0$ +ulti+edia sessions in a le2ible

+anner to allow new +ulti+edia products and services to be oered# "he 0MS can use both the .$RS and !M"S radio

access technologies#

3peration in other requency bands - 0n addition to the .H4 band1 !M"S can also operate in the 5&'MH46

7''MH46 &8''MH4 and #.H4 bands#

9nd to end :uality o Service :uality o Service +anage+ent or the $ac%et Switched ($S) do+ain including the

0MS and the radio interace#

M;MS (Multi+edia ;roadcast Multicast Service) "his allows inor+ation such as strea+ed audio and video to be

sent over one radio channel to +any custo+ers si+ultaneously#

Wireless


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Major UMTS Components

"he !M"S Release 77 architecture is co+posed o three co+ponents-

User Equipment (UE) :

!M"S +obile station can operate si+ultaneously in both $ac%et Switched ($S)>ircuit Switched (>S) +ode or only any one o the+#

0t is co+posed o Universal Subscriber Identity !dule-card (!S0M-card)1 the radi! equipment (receiver-transceiver)1 the an-ac"ine Inter#ace (MM0)

(support or +ulti+edia1 WA$1 and other services) and $attery%

U&S &errestrial 'adi! Access et!r* (U&'A) :

!M"S radio access inrastructure is called !"RA=# 0t uses Wideband >ode ?ivision Multiple Access (W>?MA ) radio technology or air interace to

co++unicate with !9#

+!re et!r* (+) :

0t provide switching1 routing and transit or user traic# 0t also contains the databases and networ% +anage+ent unctions#

>ore =etwor% is split into the ollowing do+ains@

>S do+ain

"he >S do+ain is an evolution o .SM1 with substitution o the 0u->S interace or the A

interace and relocation o the transcoders to the >= side o the 0u->S interace#

"he >S do+ain uses %bps "i+e ?ivision Multiple2ed ("?M) channels# "his do+ain

provides a si+ilar set o services as those provided by .SM#

$S do+ain

"he $S do+ain is based on .$RS1 with substitution o the 0u-$S interace or the .b

interace#

"he +ost signiicant addition is a viable architecture or the :uality o Service (:oS)# "his

architecture is essential or the support o voice and other real-ti+e +edia services on the $S

do+ain#

3ther eiciency i+prove+ents have been +ade to the .$RS "unneling $rotocol (."$) and

to +obility +echanis+s# "hese changes are designed to +a%e real-ti+e services viable over

a pac%et inrastructure#


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Major Components

>ore =etwor% is split into the ollowing do+ains@+S (+ircuit Sitc") d!main -

0t uses %bps "i+e ?ivision Multiple2ed ("?M)

channels# "his do+ain provides a si+ilar set oservices as those provided by .SM#

0t uses 0u->S interace as A interace in .SM#

PS (pac*et sitc") d!main -

"he $S do+ain is based on .$RS1 with substitution

o the 0u-$S interace or the .b interace#


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RNC

Iub

Node B

UMTS Core Network(UCN)

IuPS

RNS

Uu

Node B

RNC

RNS

Uu

Node B Node B

Iur(logical connection)

RANAPRANAP

RNSAP

NBAP

NBAP

U&'A !vervie

It is composed of one or more RNS connected tocore network throuh Iu!S"Iu#S interface$

IuCS

UE

UTRAN

UE

NBA

PIub Iub Iub

NBAP

cellcell cellcell


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U&'A +!mp!nents

!de $

A =ode ; is responsible or radio trans+issionreception in one or +ore

cells toro+ the user equip+ent# 0t can support *requency ?ivision

?uple2 (*??) +ode1 "i+e ?ivision ?uple2 ("??) +ode or dual-+ode

operation# 0t provides the ollowing interaces -

B 0ub interace towards the !M"S R=>B !u interace towards the !9

'+

"he R=> is the central ele+ent in the !"RA=# 0tCs +ain unction is to

control and +anage the RA=(Radio Access =etwor%) and the radiochannels# *or each connection between a !9 and the !"RA=1 there is

one serving R=S# A drit R=S supports the serving R=S by providing

radio resources#


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U&'A Functi!nalities

"he !"RA= provides the ollowing unctions@

B &rans#er !# user data

$rovides user data transer capability across the !"RA= between the 0u and

!u reerence points#

B 'adi! c"annel cip"erin, and decip"erin,

$rovides >iphering and deciphering services or radio channel session-dependent %ey1 derived through signaling andor session dependent

inor+ation#

B Services related t! $r!adcast and ulticast tra##ic

$rovides ;roadcast and Multicast 0nor+ation distribution and low control

B +$S status rep!rtin,

R=> collects status data per cell (=o-o-;roadcast->o+pleted-= or accounting purpose#


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Functi!ns related t! !verall system access c!ntr!l

Ad+ission control

"he purpose o the ad+ission control is to ad+it or deny new users1 new

radio access bearers or new radio lin%s#

>ongestion control

"he tas% o congestion control is to +onitor1 detect and handle situationswhen the syste+ is reaching a near overload or an overload situation

with the already connected users#

Syste+ inor+ation broadcasting

"his unction provides the +obile station with the Access Stratu+ and=on-Access Stratu+ inor+ation# "he basic control and synchroni4ation

o this unction is done in !"RA=#


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B Functi!ns related t! m!bility

Handover

"his unction is based on radio +easure+ents# 0t +anages the +obility

o the radio interace and +aintains the :uality o Service(:3S)

negotiated between the !9 and the >=#

SR=S Relocation"he SR=S relocation unction coordinates the activities when the SR=S

role is to be ta%en over by another R=S#

$aging support

"his unction provides the >ore =etwor% with the ability to contact the!9 when it is in the $


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B Functi!ns related t! radi! res!urce mana,ement and c!ntr!l

Radio resource +anage+ent is concerned with the allocation and

+aintenance o radio co++unication resources#

Radio resource coniguration and operation

0t conigures the radio networ% resources (cells 1transport channels)

Radio environ+ent survey

0t peror+s +easure+ents on radio channels#

co+biningsplitting control

0t controls the co+biningsplitting o inor+ation strea+s through cells

connection set-up and release

0t is responsible or the control o connection ele+ent set-up and release#

Allocation and deallocation o radio bearers

0t translates the connection ele+ent set-up or release requests into

physical radio channel allocation or deallocation#


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R* power control

"his group o unctions controls the level o the trans+itted power to

+ini+i4e intererence and %eep the quality o the connections#

Radio channel coding

0t provides unctions or detection or correction o signal errors

introduced by the trans+ission +ediu+# Radio channel decoding

0t provides channel coding unction to detect or correct possible errors in

the received data low#

0nitial (rando+) access detection and handling

0t provides unctions that has the ability to detect an initial access

atte+pt ro+ a +obile station and respond appropriately#


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+!reet!r* .vervie

0t provides unctions that has the ability to detect an initial access

atte+pt ro+ a +obile station and respond appropriately#

"he !M"S >ore =etwor% is split into a circuit-switched (>S) do+ain

and a pac%et-switched ($S) do+ain

>>= @

"he circuit-switched do+ain o the !M"S $ircuit>ore =etwor% (>>=)# "he >>= peror+s the +ain circuit switching

unctions and +anages the ollowing@

B co++unication a+ong !M"S !9

B co++unication between !M"S !9 and users in other networ%s

a/!r circuit-sitc"ed c!mp!nents

B "ranscoder and Rate Adaptation !nit ("RA!)

B Mobile Switching >enter (MS>)

B Ho+e


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+!reet!r* .vervie

&'AU

"he "RA! is a device that ta%es !M"S speech pac%ets as input and it

converts the+ into standard 0S?= %bps speech low#

S+

"he MS> is responsible or circuit do+ain call processing and circuit-

switched data# 0t coordinates the setup o calls to and ro+ all !M"Ssubscribers operating in its area# 0t controls the paging unction

(inco+ing calls) and peror+s tic%eting on calls or all subscribers based

in its area# "he MS> transers encryption para+eters ro+ /isitor


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+!reet!r* .vervie

Pac*et-sitc"ed d!main

"he pac%et-switched do+ain contains the ollowing +aEor co+ponents@

B ,.-Serving .$RS Support =ode (,.-S.S=)

B .ateway .$RS Support =ode (..S=)

12-S2S

"he ,.-S.S= requests location inor+ation ro+ the H


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+!reet!r* .vervie

.t"er +!re et!r* elements

30' (3isit!r 0!cati!n 'e,ister)"he /enter and the $enter (S>)#

SS Inter!r*in, S+

0t acts as an interace between a Short Message Service >enter and the $


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Protocols!u Air interace between a node; and !9#

0ub -0nterace between an R=> and its node;s#0ur - 0nterace between two R=>s support speciic unctions such as handover#

0upc - 0nterace between an R=> and a SAS (Stand-alone A-.$S SM) within the !"RA=#

0u->S - >ircuit switched variant o the 0u interace#

0u $S - $ac%et switched variant o the 0u interace#

; - 0nterace between the .SM!M"S MS> and the / - 0nterace between the .SM!M"S MS> and the H and the 90R#

. - 0nterace between /harging .ateway *unction (>.*) or billing#

.e - 0nterace between S.S= and the S>$ or >AM9< $hase 000#

. - 0nterace between S.S= and 90R#

.i - 0nterace between ..S= and the e2ternal networ%#

.n - 0nterace between ,.-S.S= and ..S=1 between dierent ,.-S.S=s in sa+e $


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UMTS trafc classes

"he !M"S networ% services have dierent :oS classes or our types o traic@

c!nversati!nal class"he conversational class is the typical class or speech telephony# "he conversational call is

the +ost de+anding class or transer delays (the +a2i+u+ aordable value is given by

hu+an perception)#

streamin, class

"he strea+ing class has the sa+e real-ti+e constraints as the conversational class#

However1 since it is a one-way class o service (the user is Eust listening or viewing) the

strea+ing class is less transer-delay sensitive than the conversational class#

interactive class

"he interactive class is not as real-ti+e constraining as the conversational and strea+ing

classes# However1 the interactive class requires a very low bit-error rate#

bac*,r!und class

"he bac%ground class is equivalent to the interactive class# "he dierence between the two

classes is that the bac%ground class is less delivery-ti+e sensitive and has a lower priority#


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UMTS Base Stations (NodeB)

Femt! +ell 0t is a s+all1 low-power cellular base station designed or use in aho+e or s+all business# 0t connects to the service providerCs networ% via broadband

(such as ?S< or cable)#

Pic! +ell - 0t is capable o providing services to !9 within a building#it is used to

e2tend coverage to indoor areas where outdoor signals do not reach well or to addnetwor% capacity in areas with very dense phone usage#

icr! +ell- 0t is served by a low power cellular base station (tower)1 covering a

li+ited area such as a +all1 a hotel1 or a transportation hub# A +icrocell uses power

control to li+it the radius o its coverage area#

acr! +ell 0t is served by a high power cellular base station (tower) covering

larger than +icrocell# "he antennae or +acrocells are +ounted on ground-based

+asts1 rootops and other e2isting structures# 0t is capable o providing services to

!9 within a city#


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UMTS Numbers

!M"S $ountry >ode I =ational ?estination >ode I Subscriber

=u+ber# MS0S?=s are allocated according to the >>0"" 9#& nu+bering plan#

ISI - "he 0nternational Mobile Subscriber 0dentity (0MS0) is a unique identiication o the subscriber# 0t is

stored in the S0M (see below) and Ho+e 0""

9#

&SI - "he "e+porary Mobile Subscriber 0dentity ("MS0) is a unique identity te+porarily allocated to visiting

!9# "he "MS0 identiies the !9 within a speciic /ircuit Switched (>S) do+ain#

P-&SI - "he $-"MS0 ($ac%et-"e+porary Mobile Subscriber 0dentity) is equivalent to the "MS01 or the $ac%et

Switched ($S) do+ain#

S' - "he Mobile Subscriber Roa+ing =u+ber (MSR=) is te+porarily assigned to the !9 while roa+ing and

is used to ter+inate calls to the !9#

docslide-net_umts-explained.pptx

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