02 Overview

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Lesson 2

UMTS System and CCN-CSTranslations Overview

The copyright of this document is the property of Nortel Networks. Without the written consent of Nortel

Networks, given by contract or otherwise, this document must not be copied, reprinted or reproduced in any

material form, either wholly or in part, and the contents of this document, or any methods or techniques

available therefrom, must not be disclosed to any other person whatsoever.

Course UM970

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Objetives

Using site-specific information and appropriate documentation, you will

be able to discuss the function and purpose of the components in theUMTS system and CCN-CS translations, such as:

Mobile-services Switching Center MSC! function

"ome #ocation $egister "#$! function

%isitor #ocation $egister %#$! function &'uipment (dentification $egister &($! function

)uthentication Center )uC! function

*ase Station Subsystem *SS! function

various networ+ functions basic call scenarios

phases of CCN-CS translations

Using site-specific information and appropriate documentation, you will

be able to discuss the function and purpose of the components in theUMTS system and CCN-CS translations, such as:

Mobile-services Switching Center MSC! function

"ome #ocation $egister "#$! function

%isitor #ocation $egister %#$! function &'uipment (dentification $egister &($! function

)uthentication Center )uC! function

*ase Station Subsystem *SS! function

various networ+ functions

basic call scenarios

phases of CCN-CS translations

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ordisclosedwithoutpermission".

UMTS !untional "r#iteture

Core Networ+UT$)N

Node **TS!

Uu

(ub )TM!

$NC

(uCS S!

$NC

(ur

(ur

(uCS S!

Node **TS!

Uu

U&

U&

(ub )TM!

U&

./ MSC

(u CS!

Circuit 0omain

"#$1)uC%#$

./S/SN

ac+et 0omain

(u S!

*

C

0

.///SN

(u

2ireless/ateway

)TM*ac+bone

)TM*ac+bone

(*ac+bon

e

(*ac+bon

e(ntranets

(ntranets

(nternet

(nternet

STN

STN

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Ciruit Core Networ$ Com%onents

CCN-CS

(u CS!

%#$"#$

C*

0

SMS-SC

&($

)ccessNetwor+

STN

2ireless /ateway

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UMTS UT&"N Com%onents and 'nter(aes

Core Networ+

UT$)N

Node **TS!

Uu

(ub )TM!

$NC(u

CS S!

$NC

(ur

(ur

(uCS S!

Node **TS!

Uu

U&

U&

(ub )TM!

)TM*ac+bone

)TM*ac+bone

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Networ$ !untions

To understand Translations in UMTS Networ+,the following activities are important:

+Incoming call handling !obile Terminating"

+#utgoing call handling !obile #riginating"

+!obility management location registration"

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CCN-CS

VLR

CCN-CS

VLR

/ateway CS

CCN-CS

HLR

$NC

$NC

STN

&T Trun+

34 ()MMS(S0N!

54 S$(MS(S0N!

.4 $N(MS(!

64 $N-)C78MS$N9

4 S$( )C78MS$N9

;4 ()MMS$N!

&T Trun+

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CCN-CS

VLR

CCN-CS

VLR

/ateway CS

CCN-CS

HLR

$NC

$NC

STN

&T Trun+

&T Trun+

/SM Trun+

/SM Trun+

34 S&TU MS(S0N!

()M MS(S0N!

()M

Mobile-to-Land Call) Overall *iture

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CCN-CS

VLR

CCN-CS

VLR

/ateway CS

CCN-CS

HLR

$NC

$NC

&T Trun+

/SM Trun+

/SM Trun+

34 S&TU MS(S0N!

54 S$( MS(S0N!

.4 $N(MS(!

64 $N-)C78MS$N9

4 S$( )C78MS$N9

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CCN-CS

VLRHLR

VLR

(old)

Country )"ome #MN Country *

%isiting #MN

34 U& roamsfrom ) to *

54 #ocation Update $e'uestincludes (MS(

.4 (MS( %erification

64 Update #ocation

4 (nsert Subscriber 0ata 8(S09;4 (S0 )c+

4 #ocation $egistration )c+

3?4 Cancel#ocation

)c+

'nter-*LMN &oamin+

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CCN-CS Translations Overview

CCN-CS translations involves the following sections:

the three phases of translations

$ phase I % the !&I&'N

$ phase II % the !&(N

$ phase III % the )ser *quipment )*"

the &(I request

the paging selector

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CCN-CS

VLR

/ateway CS

HLR

$NC

(MSISDN)

IAM

Trunk

Translations

Universal

Translations

3

5

Start MS(S0N

S$( @eature

/CS

.4 S$( 8MS(S0N9

;4 S$(-)c+ 8MS$N9

64 $N(MS(!4 $N )c+

8MS$N9

Translations *#ase ' ,MS'SN.

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CCN-CS

VLR

/ateway CS

HLR

$NC

MSRN

Table

XLAENTRY

Universal

Translations

Start

/MST$M @eature

/CS

Table

DNROUTE

Translations *#ase '' ,MS&N.

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CCN-CS

VLR

/ateway CS

HLR

$NC

MSRN

Universal

Translations

Start

/CS

aging $e'uest

Translations *#ase ''' ,U/.

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*SC

TCU

TCU

*TS

*TS

*TS

STN

AMC-S AMC-$

&($NSS *S

S

ASS

GSM Network Architecture

MSC/MSC

0MS

"#$1)uC

0MSMSC1%#$

Documents

02 Overview