OWA310002 UMTS Core Network Overview ISSUE 3.0

www.huawei.com

Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.

UMTS Core Network Overview


Objectives

Upon completion of this course, you will be able to:

describe the evolution of UMTS core network from R99

to R5

describe UMTS R99/R4/R5 core network architecture

describe UMTS number planning


Contents

1. UMTS Core Network Evolution

2. UMTS Interface and Protocol Introduction

3. UMTS Number Planning


UMTS Protocol Version Evolution

R4

R5

R99

Include all the services and functions of 2G ( GSM and GPRS )

CN is composed of CS domain and PS domain

Adopt WCDMA UTRAN Iu interface between

RAN and CN is based on ATM

Include all the services and functions of R99

CS domain change: control is separated from bearer, the function of MSC can be fulfilled by MSC SERVER and MGW.

Packet voice supported by CS domain, supporting ATM, IP, TDM

Include all the services and functions of R4

IMS domain is adopted

Enhanced IP QoS ability , supporting end to end IP multimedia service

2000 2001 2002 functionally frozen time


UMTS R99 Network Architecture

GSM /GPRS BSS

BTS

BSC

NodeB

RNC

PCU

UMTS UTRAN

SS7

SCP

SMS

SCE

Other PLMN PSTN,ISDN

Internet,Intranet

MSC/VLR GMSC

HLR/AUC

SGSN

CG BG

GGSN

GPRSbackbone

Other PLMN’s GPRS network


R99 Feature(1) Core Network is split into CS domain and PS domain.

CS domain is in charge of call control and mobility

management of circuit service.

Call control: ISUP/TUP

Mobility management: enhanced MAP

Physical node:MSC,GMSC,VLR

PS domain is in charge of session management and mobility

management of Packet service.

There are some change from GPRS: interfaces, flows, some

functions

Physical node: SGSN,GGSN,CG


R99 Feature(2)

Transcoders is placed in CN side

TFO: Tandem Free Operation

Supporting inter-system handover (UMTS/GSM)

Enhanced security and charging


UMTS R4 Network Architecture

GSM /GPRS BSS

BTS

BSC

NodeB

RNC

PCU

UMTS UTRAN

SS7

SCP

SMS

SCE

Internet,Intranet

HLR/AUC

SGSN

CG BG

GGSN

MGWMGW MGWMGW

VMSC Server GMSC Server

IP/ATM BackboneOther PLMN PSTN,ISDN

Other PLMN’s GPRS network

GPRSbackbone


MSC

SCP HLR

MSC

RAN RAN RAN

TDMMSC Server

SCP HLR

RAN RAN RAN

TDM/ATM/IPCS-MGW CS-MGW

MSC ServerTUP/ISUP/BICC

TUP/ISUP

Notes: PS domain structure remain unchangedR99 R4

H.248 H.248

MAP Over TDM MAP Over TDM/IPCAP Over TDM CAP Over TDM/IP

CS domain evolution

Difference between R99 and R4


R4 CN Feature(1)

CS domain

Control is separated from bearer,MSC is split into MSC

server and MGW

Traffic bearer can be IP , ATM or TDM

Signaling bearer can be IP or TDM

TrFO: Transcoder Free Operation


R5 Network Architecture

GSM /GPRS BSS

BTS

BSC

NodeB

RNC

PCU

UTRAN

SS7

SCP

SMS

SCE

Internet,Intranet

HLR/AUC/HSS

SGSN

CG BG

GGSN

GPRSbackbone

MGWMGW MGWMGW


IP/ATM BackboneCS domain

PS domain

Iu-CS

Iu-PS

IP backbone

MRFPMRFP

IMS domain

MGWMGW

P-CSCF S-CSCF

MGCF

MRFC

Other PLMN PSTN,ISDN


R5 CN Feature

Multimedia service based on IP

IP multimedia subsystem

SIP call control protocol

Interworking with other domain

Interworking with CS domain

Interworking with IP domain

CAMEL4

IPV6


Service

Control

Switch

Access

SoftSwitch

3G AccessAMGIAD

Broadband Access

PSTN

TMGSG

PLMN

IP core network

UMG

UMG

App ServerPolicy ServeriOSS IN

SoftSwitch

MRS

SS RR

The Trend of Network: Network Layer Structure


Contents





User Equipment Domain

Access Network Domain

Core Network Domain

Infrastructure Domain

Cu

Mobile Equipment Domain

USIM Domain

Home Network Domain

Transit Network Domain

Uu Iu

[Zu]

[Yu]

Serving Network Domain

The core network domain may result from evolutions of existing network infrastructure.

UMTS Architecture


Interfaces in R99 network

GSM /GPRS BSS

BTS

BSC

NodeB

RNC

PCU

UMTS UTRAN

SS7

SCP

SMS

SCE

PSTNISDN

Internet,Intranet

MSC/VLR GMSC

HLR/AUC

SGSN

CG BG

GGSN

Other PLMN

A

Gb

Iu-CS

Iu-PS

Gi

Gp

C/D/Gs

Gr/Gs/Gd/Ge Gc

GPRS backbone


MSC/VLR GMSC

Node B

RNC

HLR/AuC

GGSNSGSN

PSTN

GPRS backbone

CGF BG

SS7

SCP

Inter-PLMN

Iub

Iu-PS

Iu-CS

L1 （ PHY）

ATM

AAL5

SSCOP

SSCF-NNI

MTP3B

SCCP

RANAP

AAL2

IuUPControl PlaneControl Plane User PlaneUser Plane

Iu-CS Interface Protocol Stack


MSC/VLR GMSC

Node B

RNC

HLR/AuC

GGSNSGSNGPRS

backbone

CGF BG

SS7

SCP

Inter-PLMN

Iub

MAP

CAP

ISUP

TUPTCAP

SCCP

MTP3

MTP2

MTP1

BSSAP+

PSTN

SS7 Interface Protocol Stack


MSC/VLR GMSC

Node B

RNC

HLR/AuC

GGSNSGSN

CGF BG

SS7

SCP

Inter-PLMN

Iub

L1 （ PHY）

ATM

AAL5

SSCOP

SSCF-NNI

MTP3B

SCCP

RANAP

AAL5

GTP-UControl PlaneControl Plane User PlaneUser Plane

IP

UDP

Iu-PS

GTP(GTP')

UDP

IP

L2(MAC)

L1(PHY)

Gn/Gp/Ga

GPRS backbone

PSTN

PS Domain Interface Protocol Stack


New Interfaces in R4

GSM /GPRS BSS

BTS

BSC

NodeB

RNC

PCU

UMTS UTRAN

SS7

SCP

SMS

SCE

PSTNISDN

Internet,Intranet

HLR/AUC

SGSN

CG BG

GGSN

GPRS backbone

Other PLMN

MGWMGW MGWMGW


IP/ATM Backbone

Nc

McNb


Interfaces in R4 CS Domain

MGW

Mc Mc

Nb

NcMSC

Server

MGW

GMSC Server

BICC/ISUP/TUP MTP3 MTP3B M3UA MTP2 SSCF/SSCOP SCTP MTP1 AAL5/ATM IP

H.248 SCTP UDP MTP3B

IP SSCF/SSCOP/AAL5

RTP AAL2 Voice UDP/IP ATM PCM


R5 network interface

P - C S C F

I M S u b s y s t e m

C S C F M G C F H S S

C x

I P M u l t i m e d i a N e t w o r k s

I M S -M G W

P S T N

M n

M b

M g

M m

M R F P

M b

M r

M b

L e g a c y m o b i l e s i g n a l l i n g N e t w o r k s

C S C F

M w

G o

P D F

M w

G m

B G C F M j M i

B G C F

M k M k

C , D , G c , G r

U E

M b

M b

M b

M R F C

S L F D x

M p

P S T N

P S T N


Interfaces ListType Name Bearer Loation

Function

Iu-CS（RANAP）

ATM/ IP(R5)

MSC-RNC WCDMA user signaling access and voice bearer assignment

Iu-PS（RANAP）

ATM/ IP(R5)

SGSN-RNC WCDMA user signaling access and data bearer assignment

CN-RAN

A (BSSAP) TDM MSC-BSC GSM user signaling access and voice bearer assignment CS-PS Gs

( BSSAP+) TDM MSC-SGSN Inter-working between PS domain and CS domain,

e.g. combined location update, combined paging. B Internal

interface MSC-VLR Inner interface, used for user information query, for

example, mobility management, LAU, supplemental services activate and so on.

C MSC-HLR Get MSRN, get user’s intelligent service status, Get user’s location(29.002, 23.078)

D VLR-HLR Get MSRN, get user’s intelligent service status, Get user’s location(29.002, 23.078)

E MSC-MSC Handover between different MSC. And the SMS transfer between SMC and MSC.(29.002)

F MSC-EIR Check UE IMEI status G VLR-VLR Exchange user’s information(IMSI, authentication data)

between different VLR (29.002) Gr SGSN-HLR PS user subscribe information, UE location information

MAP

Gc

TDM/ IP

GGSN-HLR Support PUSH service (network initiate PDP context activation )


Interfaces ListType Name

Bearer Location Function

CAP CAP TDM/ IP

MSC(SSP)- SCP

Wireless intelligent network interface, used for intelligent service logical control

Mc ( H.248 ) IP/ ATM

MSC Server – MGW

Inter-working between control plane and bearer plane

Nc( ISUP / BICC)

TDM/ ATM/ IP

MSC Server --- GMSC Server

Control plane negotiate between MSC Servers

Nb (NbUP/IuUP)

TDM/ ATM/ IP

MGW—MGW User plane negotiate between MGWs

Media Control Inter- face

MTUP /MISUP

TDM GMSC—PSTN/TMSC

Communicate with outside network, e.g. PSTN, ISDN

Gn/Gp SGSN-GGSN SM management Ga

IP GSN-CG Charging

Gr SGSN-HLR Location management, subscriber information management

Gc

TDM/ IP

GGSN-HLR Optional interface and support PS MT service: PUSH

PS CN interface

Gi IP GGSN-PDN Communication with the outside data network Uu Radio UE—NodeB Air interface Iub ATM/

IP(R5) NodeB—RNC Radio resource management

RAN interface

Iur ATM/ IP(R5)

RNC-RNC Soft handover


Contents





Contents


3.1 Subscriber Number

3.2 Network Equipment Number

3.3 Area Number


IMSI

MCC MNC MSIN

3 digits 2/3 digits

Not more than 15 digits

IMSI (International Mobile Subscriber Identity)

NMSI

MCC: Mobile Country Code

MNC: Mobile Network Code

MSIN: Mobile Subscriber Identification Number

NMSI: National Mobile Subscriber Identity


TMSI TMSI: Temporary Mobile Subscriber Identify

Function: Taking the place of IMSI to be transferred in radio interface to

ensure the security of subscriber’s information.

Structure: consists of 4 octets, and the structure and coding can be

chosen by agreement between operator and manufacturer in order to

meet local needs.

Type:

TMSI, used in CS domain, allocated by VLR;

P-TMSI, used in PS domain, allocated by SGSN;

Notes: the TMSI has only local significance (i.e. within a VLR and the

area controlled by a VLR, or within an SGSN and the area controlled by

an SGSN).


IMEI

The IMEI is composed of the following elements (each element shall consist of decimal digits only):

Type Allocation Code (TAC). Its length is 8 digits;

Serial Number (SNR) is an individual serial number uniquely identifying each equipment within each TAC. Its length is 6 digits;

Spare digit: this digit shall be zero, when transmitted by the MS.

TAC SNR SPARE

1 digits6 digits

IMEI (International Mobile Equipment Identity)

8 digits


MSISDN

CC NDC SN

National ( Significant ) Mobile Number

MSISDN: Mobile Station International ISDN number

CC: Country Code

NDC: National Destination Code

SN: Subscriber number


MSRN MSRN: Mobile Station Roaming Number

Function: to route calls to called MS/UE

Structure: the same as MSISDN

Notes:

The MSRN must not be used for subscriber dialling.

The MSRN normally uses number segment different from

that of MSISDN.

MSRN is allocated by the VLR that the called MS is

visiting.


IMS Subscriber Identification Private user identity: the unique global identifier of IMS user’s

subscription . It is similar to IMSI, stored in HSS and can’t be modify by UE. The Private User Identity identifies the subscription, not the user.

Format: similar to Email address.

E.g. sip: [email protected]

Public user identity: the called identifier of IMS subscriber when IMS subscriber using telecommunication service. It is similar to MSISDN, and can be informed to other subscribers.

Format: there are two types of public ID format, i.e. SIP URI and Tel URI

SIP URI ： sip: [email protected]

tel URI: +86 139 0001 2000


Contents




3.3 Area Number


Network Equipment Number

MSCs, GSNs and location registers are identified by

international PSTN/ISDN numbers and/or Signalling Point

Codes ("entity number", i.e., "HLR number", "VLR number",

"MSC number", "SGSN number" and "GGSN number") in each

PLMN.

CC NDC SN

MSC/VLR/HLR/SGSN/GGSN Number


Network Equipment Address IP address: SGSN, GGSN, CG, MGW, MSC Server will use

IP address to communicate to other network nodes.

IPv4 address: 32 bits, e.g. 10.136.20.15;

IPv6 address: 128 bits, e.g.

FEDC:BA98:7654:3210:FEDC:BA98:7654:3210

SGSN GGSN

IP IP

GnMGW

Mc

Nc

MGW

MSC Server

CG

IP

Gi

Gi

McNb

MSC Server


gd.ims.com.mnc<MNC>.mcc<MCC>.gprs

Network ID Operator ID

Access Point NameAccess Point Name

The APN Network Identifier which defines to which

external network the GGSN is connected to and optionally

a requested service by the MS. This part of the APN is

mandatory.

The APN Operator Identifier which defines in which PLMN

GPRS backbone the GGSN is located. This part of the APN

is optional.


SIP Address of IMS Equipment

In IMS subsystem, SIP protocol is widely used, and

SIP address is used to identify related network

equipment. For example, P/S/I-CSCF, BGCF, MGCF

etc. use SIP address for addressing.

SIP address will be translated into IP address by DNS

service.P-CSCF S-CSCF

sip: [email protected] sip:[email protected]

DNS


Contents




3.3 Area Number


Area Number

cellService area

PLMN B

PLMN A

Location area/ Routing area

MSC/VLR area

SGSN area

PLMN area


PLMN Identifier

PLMN Identifier: is used to uniquely identify a PLMN

network in the world.

MCCMCC MNCMNC

PLMN ID

MCC: Mobile Country Code;

MNC: Mobile Network Code.


Location Area Identification By detecting LAI, MS/UE may perform Location Area

Update procedure.

The Paging message for idle UE is broadcasted within a LA in CS domain.

MCC: Mobile Country Code

MNC: Mobile Network Code

LAC: Location Area Code, 2 octets, using a full hexadecimal representation except 0000 and FFFE.

MCCMCC MNCMNC

Location Area Identification

LACLAC


Routing Area Identification By detecting RAI, MS/UE may perform Routing Area

Update procedure.

The Paging message for idle UE is broadcasted within a

RA in PS domain.

RAI = LAI + RAC

Routing Area Code (RAC) which is a fixed length code (of

1 octets) identifying a routing area within a location area.

MCCMCC MNCMNC

Routing Area Identification

LACLAC RACRAC


Service Area Identifier The Service Area Identifier is used to identify an area

consisting of one or more cells belonging to the same

Location Area. Service Area can be used for indicating the

location of a UE to the CN.

SAI = LAI + SAC

SAC: Service Area Code, 2 octets, using a full hexadecimal

representation

MCCMCC MNCMNC

Service Area Identifier

LACLAC SACSAC


MCCMCC MNCMNC

Cell Global Identification

LACLAC CICI

Cell Global Identification

CGI, Cell Global Identification, the unique identifier of a

Cell in the PLMN.

CGI = LAI + CI

CI: Cell Identity, is of fixed length with 2 octets and it can

be coded using a full hexadecimal representation. Cell

Identity must be unique within a location area.


Summary

The evolution of UMTS network;

The main interfaces in core network;

The numbers of UMTS network: RAI, LAI, IMSI,

MSISDN etc.

Thank youwww.huawei.com

OWA310002 UMTS Core Network Overview ISSUE 3.0

Documents

Transcript of OWA310002 UMTS Core Network Overview ISSUE 3.0