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18-Nov-20

GSM Architecture ECPC 72 ( WMC) ECPC-72

Dr. Rajender Kumar AP, ECE D, NIT Kurukshetra 1.1

The NSS solution Session presentation

Obj ti  Objective:  To be able to introduce the Alcatel 900/1800 NSS solution, locate each Alcatel NSS equipment, and list their interfaces

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1 GSM Identifier

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1 GSM Identifier : GSM Network

GSM Network EXTERNAL NETWORK

PLMN

BSS

NSS (Network and Switching Sub-system)

(Base Station System)

MS

OSS (Operation & maintenance Sub-System)

OPERATORS USERS

8

-20

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1 GSM Identifier NSS NSS EXTERNAL NETWORK

(Network (Network and and Switching Switching Sub Sub--system)

IMSI IMSI MS-ISDN

Ki IMEI IMSI LA

BSS

OSS

(Base Station System)

(Operation & maintenance Sub-System)

1.5

1 GSM Identifier User Identifiers in a PLMN  Concept of SIM Card (“SIM Roaming”) Mobile Station GSM SIM ID1



Plug-in SIM

Subscriber Identity Module 18-Nov-20

6 1.6

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1 GSM Identifier User Identifiers in a PLMN  IMEI =Serial number of your mobile IMEI

TAC

FAC

Type Approval Code

IMEISV:

SNR

SP

(SPare)

Serial NumbeR Final Assembly Code

TAC

FAC

SNR

SVN

Software Version Number

( International Mobile Equipment Identity and Software Version number) (Phase 2+)

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7 1.7

1 GSM Identifier User Identifiers in a PLMN CC

 MS MS--ISDN = Mobile Phone Number  IMSI = Subscriber Identity in the network and store in the SIM card

NDC

Country National Code Destination Code 1 to 3 2 to 4

MCC

MNC

Mobile Mobile Country National

SN xx xx xx xx

xx

Subscriber Number ( national identity ) total up to 15

MSIN xx xx xx xx

xx

Mobile Subscriber Identity

Code

Code

Number

3

2

max 10

208 208 01 01 69xxxxxxxx 69xxxxxxxx IMSI

IMSI MS-ISDN

I want to call MS-ISDN

33 33 607 607 61xxxx 61xxxx 18-Nov-20

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1 GSM Identifier User Identifiers in a PLMN MCC

MNC

LAC

CI

LAI

 Cells and Locations Area

CGI

LAI: Location Area Identification Â

MCC = Mobile Country Code

Â

MNC = Mobile Network Code

Â

LAC = Location Area Code

CGI: Cell Global Identification Â

LAI

=Location Area Identifier

Â

CI

= Cell Identifier

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9 1.9

1 GSM Identifier User Identifiers in a PLMN

Random number selection GSM

Ki

RAND (128 bits)

Radio Channel

SIM card Identification key (128 bits)

Ki

RAND

A3

A3

A3

A3 SRES

Signed ref. (32 bits)

SRES

=? OK

A8

A8

A8

Cipher command

Kc : Cipher key

A8 BTS

Kc

for the call (64 bits) A5 Speech - Data - Signalling

A5

Ciphering/Deciphering

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Ciphered data

TMSI Allocation

A5

A5 Speech - Data - Signalling

Ciphering/Deciphering

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NSS Architecture

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2 NSS implementation Solution

IWF MSC SMIM

SSP

External Networks

MSC

HLR

AuC

RCP

HLR

VLR

VLR

AuC 18-Nov-20

HLR

12 1.12

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2 NSS implementation Alcatel Solution Alcatel 1000 E10 MSC SMIM

SSP

External Networks

MSC

RCP

A1422

VLR AuC 18-Nov-20

Alcatel HLR 13

HLR

1.13

2 NSS implementation RCP functions

VLR RCP

RCF

SCCP Gateway 18-Nov-20

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2 NSS implementation HLR functions

HLR HLR

AuC 18-Nov-20

15 1.15

2 Alcatel NSS implementation SSP function

SSP

STP

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2 Alcatel NSS implementation SSP Station

Exist in two different Technologies:  Alcatel 1000 E10  Alcatel 1000 MM E10

SSP

Î System functions are distributed over its component modules Î it has a modular architecture 9 Ease of adaptation 9 Reliability 9 Dependability 9 Easy upgrades 18-Nov-20

17 1.17

2 Alcatel NSS implementation HLR / RCP Station

RCP

HLR

Based on the same hardware: A836x

– – – – – – 18-Nov-20

multiprocessor (with common memory) multitasking protected (hardware and software redundancy) modular (application-dependent configurations) does not incorporate hardware for circuit switching supports the SS7,X.25 and TCP/IP communication protocols (included in the operating system, RTOS) 18 1.18

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NSS Interfaces

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3 NSS interfaces

BSSAP

A interface

DTAP

RCP

BTS

BSC

BSSMAP

INAP ALCATEL

E and G interfaces

BSS

ISUP SSP

PSTN

MAP INAP ALCATEL Logical connection RCP

C and D interfaces

MAP

PCM connection HLR 20 1.20

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3 Alcatel NSS Interfaces Global Network SALE Administration Center

CDRC

NMC2 SCP

OMC

HLR SMIM

PSTN

RCP SSP

Voicemail Server

BTS

BSS SM-SC BSC

EIR CBC 18-Nov-20

21 1.21

Thanks For queries & suggestions, Please contact  Dr. Dr Rajender Kumar  E-mail: [email protected] [email protected]  Website : https://nitkkr.ac.in/comp_faculty_details.php?idd=248  Phone : (0ff) 01744-233139  Mobile : +91 - 8950603123

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Basic Services & Operators ECPC 72 ( WMC) ECPC-72

Dr. Rajender Kumar AP, ECE D, NIT Kurukshetra 1.1

Features presentation

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Features presentation Session presentation

Objective: ti  Obj  To be able to introduce the GSM services provided to the subscriber, and the operator and network features, and the value-added services available in the Alcatel NSS solution

1.3

Features presentation Session presentation

Program : Page

 Features presentation

1

z 1 Basic Services

4

z 2 GSM Supplementary Services provided to the subscribers

9

z 3 Operators and network features

19

z 4 Network and value-added services (CAMEL)

25

z Exercises

33

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Features presentation 1 Basic Services

1.5

1 Basic ServicesTeleservices and Bearer Services

 Teleservice: Transmission capability including terminals and applications  Bearer Service: According network capabilities Interfaces

Teleservices Bearer services

TE TE

... … … ...

GSM PLMN

IWF

TE = Terminal Equipment

Transit network, if any

IWF

Terminating network

IWF = InterWorking Function

1.6

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1 Basic Services Categories of Teleservices

Class

Name

Abbreviation

Telephony Speech Emergency call Short message service

Fax service

Short message mobile terminated

SM MT

Short message mobile originated

SM MO

Alternate speech and facsimile group 3 (transparent and non-transparent) Automatic facsimile group 3 (transparent and non-transparent)

1.7

1 Basic Services Transparent and Non Transparent mode

 Transparent mode Î Fixed rate, no flow control: fast but high error ratio  Non Transparent mode Î the RLP (Radio Link Protocol) is implemented. 9 This protocol is similar to the HDLC protocol, and secures transmission. 9 However, it causes uncontrolled delays because of the repetition procedures to counteract bad transmissions.

1.8

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1 Basic Services Bearer Services : principles Data Transmission between 2 PSTN users Standard interface

PSTN

Standard interface

3.1 kHz audio line Audio modem

Audio modem

PSTN user

Standardized transmission

(DTE)

(DCE)

(DCE)

PSTN user (DTE)

Data Transmission between one GSM user and one PSTN user Standard interface

GSM Network

IWF

PSTN

St d d iinterface Standard t f

3.1 kHz audio line

GSM user (DTE)

GSM transmission

Audio modem

Standardized transmission

(DCE)

Audio modem

(DCE)

PSTN user (DTE) 1.9

Features presentation 2 GSM Supplementary Services provided to the h subscribers b ib

1.10

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2 GSM Supplementary Services provided to the subscribers CLIP/CLIR A

B

CLIP Call from A

CLIP A

CLIR

B

unknown

CLIR override Call from A

1.11

2 GSM Supplementary Services provided to the subscribers CW/CH

CH

CW MSC HLR PLMN

1.12

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2 GSM Supplementary Services provided to the subscribers COLP/COLR B

A

C Number of C

COLP

COLP Number of B

A COLR C

B Number of C COLR Override

1.13

2 GSM Supplementary Services provided to the subscribers Call forwarding (CF) Unconditional CF Unconditional HLR

A VLR

Conditional CF On BUSY On No REPLY C

On No REACHABLE

VMSC

GMSC

1.14

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2 GSM Supplementary Services provided to the subscribers Subscriber controled call barring (CB) All outgoing calls (CBOC) Outgoing international calls (CBOI)

FPLMN FPLMN

Outgoing international calls except to the home country (CBOIEXHC) All incoming calls (CBIC) All incoming calls when the subscriber is outside his/her home country (CBIRO)

HPLMN

FPLMN

1.15

2 GSM Supplementary Services provided to the subscribers Explicit call transfer (ECT)

B

Subscribers B and C 3

C

connected

A

ECT

1.16

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2 GSM Supplementary Services provided to the subscribers Multiparty conference call (MPTY)

Situation before conference set up

SSP A

B BSS

Situation after

C

conference set up A-B active

A-C on hold

SSP

A

B BSS C

A-B-C in conference

1.17

2 GSM Supplementary Services provided to the subscribers Closed user group (CUG)

F

G CUGIC = 033611AB

A D

C

B

CUGIC = 03361155 E

Subscriber A: CUGIC 033611 OCB, OA, IA 1.18

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(2 GSM Supplementary Services provided to the subscribers Multiple Long Distance Carrier selection service MLDC)

CARRIER 1

PLMN a

PLMN b

CARRIER 2

CARRIER 3

P S T N

1.19

Features presentation 3 Operators and network features

1.20

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3 Operators and network features Operator determined call barring (ODB)

 Incoming calls  Outgoing calls

FPLMN FPLMN

HPLMN

 Premium rate outgoing calls  Barring of recording of forwarded-to numbers

FPLMN

1.21

3 Operators and network features Mobile Number Portability (MNP)

Number Range Owner Network NPDB

Subscription Network HLRB

MNP- SRF

PSTN

MNP-SRF GMSCA NPDB

GMSCB

IAM (MSRN)

PORTABILITY CLUSTER 1.22

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3 Operators and network features Mobile Number Portability (MNP)

Number Range Owner Network

Subscription Network HLRB

MNP- SRF

NPDB

MNP-SRF GMSCA NPDB

GMSCB

Other Network NPDB

IAM (MSRN)

MNP-SRF

INDIRECT ROUTING DIRECT ROUTING VMSC

GMSC

PORTABILITY CLUSTER 1.23

3 Operators and network features Support of Optimal Routing (SOR)

International SCCP Gateways VLR SCCP

VMSC

International SCCP Gateways

VPLMN GMSC

SCCP

International Transit center

Called party HPLMN

COUNTRY 1

HLR i nterrogati t ti on GMSC PLMN

Trombone effect SCCP COUNTRY 2

1.24

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3 Operators and network features Support of Optimal Routing (SOR)

International SCCP Gateways VLR SCCP

VMSC

International SCCP Gateways

VPLMN GMSC

SCCP

International Transit center

Called party HPLMN

COUNTRY 1

HLR GMSC

PLMN

SCCP

interrogation

COUNTRY 2

1.25

Features presentation 4 Network and value-added services (CAMEL)

1.26

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4 Network and value-added services (CAMEL) IN GSM

SSP

HPLMN

RCP IN-GSM IN GSM

SCP

1.27

4 Network and value-added services (CAMEL) IN Network

SAC SSP

Speech

INAP-CS1 INAP CS1

HPLMN FPLMN

SCP

1.28

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4 Network and value-added services (CAMEL) CAMEL

HLR

MAP

MAP CAP / MAP HPLMN FPLMN

SCP

1.29

4 Network and value-added services (CAMEL) CAMEL vs IN NETWORK HPLMN CAMEL SCP

IN- GSM

HLR

1

VLR1

Réseau N°7 SSP INAP-CS1

INAP-CS

N°7 gateway

IN- Network

CAP

2

3

N°7 network

N°7 gateway

N°7 gateway

Telephone circuits

O-CSI service

NUM=SAC+...

N°7 network

N°7 network

VLR3 Cooperating PLMN

VLR4

Non-cooperating PLMN

1.30

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4 Network and value-added services (CAMEL) Mobile network services



Pre-Paid SIM CARD (PPS)



MOBILE VIRTUAL PRIVATE NETWORK (MVPN)



MOBILE UNIVERSAL ACCESS NUMBER (MUAN)

1.31

4 Network and value-added services (CAMEL) OC Call with CAMEL service Request-Report-BCSM-Event Initial DP Connect Event-Report-BCSM

END

SCP RCP

Createretrieve (ISDN ISDN) (CIC) JOIN Create, Event (ANM) (ACM) CIC31) Event Retrieve_RES(CIC31

PSTN SSP CIC6

BSC CIC31

ANM ACM IAM (ISDN ISDN)

1.32

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6 Features presentation Exercises

9 Answer the following list of questions.

Time allowed : 20 minutes

1.33

6 Features presentation Exercises

 Question 1/4 z Services are composed of Tele-services and Bearer services z Complete the diagram below with the appropriate name from the list:

Î Tele-services Î Bearer services

TE

... … … ...

TE

GSM PLMN

IWF

Transit network, if any

Terminating IWF

Network

1.34

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6 Features presentation Exercises

 Question 2/4

… / 1 Point

z Consider the following example z Only A has the CLIP service. If A calls B, which information is displayed on B screen?

Î A number Î B number Î Nothing (Select the correct answer)

1.35

6 Features presentation Exercises

 Question 3/4 z Consider the following example z Only B has the COLP service. If A calls B, which information is displayed on B screen?

Î A number Î B number Î Nothing (Select the correct answer)

1.36

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6 Features presentation Exercises

 Question 4/4 z In the following list, map the Feature with the correct definition call barring (CB) Operator determin...