© Alcatel University – 8AS902001638VHZZA Ed.022.1

2 Radio environment

2.2

2 - Radio environment Session presentation

Objective :

to be able to configure the radio environment to suit the RCP

Program :

Page

2.1 Global radio environment of an RCP 2.3

2.2 Radio environment of an RCP in GSM 2.11

2.3 Radio environment of an RCP in UMTS 2.19

2.4 GSM - UMTS interactions 2.29

© Alcatel University – 8AS902001638VHZZA Ed.022.3

2 - Radio environment

2.1 Global radio environment of an RCP

2.4

2.1 Global radio environment of an RCPOverview of the EVOLIUM UMTS network

3GPP UMTS core network

with UTRAN and BSS

BG

Circuit domain

EIRSMSCSCP

Packet domain

A

Iu-PSIP

Network

3G GGSN

GPRSbackbone

3G MSC/VLR

3G SGSN

HLR

BTS BSC

IubRNC

Iub

Abis

Node B

Node B

Um

Uu

Uu

UE

RNS

BSS

Circuit CoreNetwork

GMSC

PSTN

Gr

Gn

Gi

CD

Gc

DNSDHC

P

GsIu-C

S

Gb

2.5

• The LAs that form these cells/SAs

2.1 Global radio environment of an RCP Radio environment components

RCP1 RCP2

BSC

1

RNC

2

BSC

3

RNC

4

• Cells controlled by these BSC/RNC's• Area Managed by RCP

• BSC/RNC's placed under the control of the RCP

• SAs controlled by these RNC's• Adjacent LAs (Brown, blue, pink)

One

individual cell

One

individual SA

=

a group of cells

2.6

2.1 Global radio environment of an RCP Location area (LA) structure

antenne omnidirectionnelle

antennes sectorisées

antenne unidirectionnelle

station de base

contrôleur de stations de base

LEGENDE

(25)

(25)

(25)

(25)

(25)

150

trafic en Erlangs (BSC) 150

trafic en Erlangs (BTS) (25)150

150

100 50

300

300

50

50

50

200

traffic in Erlangs (BTS)

traffic in Erlangs (BSC)

omni-directional antenna

sectorized antenna

uni-directional antenna

base station

base station controller

2.7

PLMN-Id = MCC + MNC identify the PLMN

Location Area Identifier - LAI

LAI = PLMN-Id + LAC LAC is the code of the LA within the PLMN (1 to 65635)

Cell Global Identifier - CGI

CGI = PLMN-Id + LAC + CI CI is the identifier of the cell within the LA (1 to 65635)

Service Area Identifier - SAI

SAI = PLMN-Id + LAC + SAC

2.1 Global radio environment of an RCPLocation areas

2.8

2.1 Global radio environment of an RCPImpact in the signalling network

The interfaces of the RCP with other

entities

SSP

OMC-CSX25

Q3 IC

RCPSPn

HLR

SPn

SMSC

SPn

SU2ACross

Connect

RNC MTP

SCCP

TCAP

MAP

MTPSCCPTCAPINAP

MTP

SCCP

RANAP

SPn

ATM

AAL5

MTP3b

SCCP

RANAP

SPn

SPL

SPn

SPnIu-CS

EIR

SPn

BSC A

MTP

SCCP

BSSAP

SCP

SPnMTPSCCPTCAPCAP

SPL

SPn

ATM / SDM

E1 / TDM

2.9

MTP3Narrowband

2.1 Global radio environment of an RCPUMTS : MTP3 evolution 1/2

SU2A

RNCi

NI=N, SPrnci

RCPj

Signallinggateway

MTP3b

BroadbandNI=N, SPssp

NI=NS Psu2a1

NI=N,SPrcpjLN 1

LN 2

NI : Signalling Network Identity = N national

LN = Logical Network

NI=NS Psu2a2

ATM / SDM

E1 / TDM

LN BB

FSM 1

FSM 2

© Alcatel University – 8AS902001638VHZZA Ed.022.11

2 - Radio environment

2.2 Radio environment of an RCP in GSM

2.12

2.2 Radio environment of an RCP in GSMArchitecture

BSS BSC

AA

PSTNGMSC

HLR SCP

MSC-VLR

SSP

RCP OMC-CS

SMSC

TDM

CDRCollecto

r

VM

IEEIR

TC

2.13

2.2 Radio environment of an RCP in GSMRadio resources management

RCP

SSP

BSC

LA

LA

GSM radio environment :

CREBSCBSCs

cells, LACs CREREV

CREAML (HO)

CREAVL (LocUpd)

MSC

LA

LA

Adjacent environment( adjacent LACs )

!

2.14

2.2 Radio environment of an RCP in GSM BSCs declaration & deletion

BSC management

INTBSC to interrogate

CREBSC to create A BSC is declared by CREBSC. It involves specifying:

the name of the BSC (arbitrary) its SPC (in the communication network local to the RCP), as it was

declared when creating RCP BSC communication (ANS object), its number (value to be specified according to information from the

SSP team), its type (BSCTYP). This complex parameter conveys a set of BSC

software characteristics, an explanation of which is beyond the scope of this course. We will therefore assume here that BSC is of a known type.

MODBSC to modify

DELBSC to suppress

2.15

2.2 Radio environment of an RCP in GSM Cells declaration & deletion

Cells & LA management INTREV to interrogate CREREV to create

Cells are declared by CREREV. It is important to specify: the number of the cell within the LA. the code of the LA to which it belongs. the name of the BSC on which it depends. the geographic area (GAN) on which it depends. This item of data is

used for routing emergency calls (example: 18 = fire service) to stations closest to the caller. It must be completed on the basis of information from the SSP team.

the address of the cell (LOCNB); the cell addresses default to the address of their MSC.

the cell's charging zone (NCGZ). This data item is rarely used: in networks where charging dependent on the caller's location is applied. It must be completed on the basis of information from the SSP team.

MODREV to modify DELREV to suppress

2.16

2.2 Radio environment of an RCP in GSM Adjacent LAs declaration & deletion

Adjacent MSC & VLR management : adjacent LAs are declared twice

as LA managed by adjacent MSC, The command used is CREAML which defines for each adjacent

LA the name (MSCNAM) and global title (MSCGA) of the MSC on which it depends

INTAML to interrogate adjacent MSC (HO) DELAML to suppress

as LA managed by an adjacent VLR. The command used is CREAVL which defines for each adjacent

LA the SPC (VLRDPC) or GT (VLRGA) of the VLR on which it depends.

INTAVL to interrogate adjacent VLR (LU) DELAVL to suppress

2.17

2.2 Radio environment of an RCP in GSM Modification procedure of the radio environment - 1

1. Are there cells to be deleted from an LA (or a BSC) of this RCP?

If YES: delete the declarations of these cells (DELREV).

2. Are there BSCs to be deleted from this RCP?

If YES: delete the declarations of these BSCs (DELBSC). delete the RCP BSC communication.

3. Are there BSCs to be added to this RCP?

If YES: create the RCP BSC communication. declare these BSCs (CREBSC).

4. Are there cells to be added to an LA (or a BSC) of this RCP?

If YES: declare these cells (CREREV).

RCP

SSP

BSC

LA

LA

MSC

LA

LA

2.18

2.2 Radio environment of an RCP in GSM Modification procedure of the radio environment - 2

5. Has an LA stopped being adjacent for this RCP?

If YES : delete the declaration of this LA as an adjacent LA (DELAML, DELAVL). Has its MSC stopped being adjacent? if YES delete the RCP adjacent MSC

communication.

6. Has an LA become adjacent for this RCP?

If YES : if necessary, create the RCP adjacent MSC communication, Then, declare this LA as adjacent (CREAML, CREAVL).

Points 5 and 6 must be repeated for all the affected LAs.

© Alcatel University – 8AS902001638VHZZA Ed.022.19

2 - Radio environment

2.3 Radio environment of an RCP in UMTS

2.20

2.3 Radio environment of an RCP in UMTSCircuit Domain architecture

EVOLIUM UMTS core network (circuit domain)

PSTNGMSC

HLR SCP

3G MSC-VLR

SSP

RCP OMC-CS

SMSC

TDM

CDRCollecto

r

VM

IE

or ATM

UTRAN RNCIu-csIu-cs

TC

EIR

2.21

2.3 Radio environment of an RCP in UMTSRadio resources management

RCP

SSP

BSC

RNC

LA

LA

Existing (GSM) radio environment :

New (UMTS) radio environment :

CREBSC

CRERNC

LA

SA

SA

BSCs

cells, LACs CREREV

SAs

RNCs

CRESAE

CREAML (3G->2G HO)

, LACs

! !

CREAVL (3G->3G LocUpd)

MSC

LA

Adjacent environment

CREAMU (3G->3G HO)

LAis the same( adjacent LACs )

But ...

2.22

2.3 Radio environment of an RCP in UMTSRNC declaration - 1

RNC management

CRERNC :

RNCNAM = RNC name ( free local value ) RNCDPC = RNC DPC (Must be declared in an ANS object) RNCNUM = from 00 to 95 ( used as called number by the RCF in

the CREATE message ) RNCID = from 0 to 4095 ( RNC UTRAN Identifier ) LAC = list (10 max) of LACs under control of this RNC

INTRNC

DELRNC

2.24

2.3 Radio environment of an RCP in UMTS UMTS local Service Area - 1

To manage the UMTS local Service Area Environment of the RCP

CRESAE LAC = Location area Code SAC = Service area Code GAN = Geographical area number LOCNB = Location (E164) number of the service area NCGZ = Charging zone number of the service area LATIT = Latitude of the service area LONGIT = Longitude of the service area RADIUS = Radius of the service area

DELSAE

MODSAE

INTSAE

2.26

2.3 Radio environment of an RCP in UMTSRNC of an adjacent MSC

To manage RNC of an adjacent MSC

CREAMU PLMN = MCC+MNC of the PLMN RNCID = from 0 to 4095 ( RNC UTRAN Identifier ) RNCNAM = RNC name ( free local value ) MSCNAM = adjacent MSC name MSCGA = global address of the adjacent MSC

DELAMU

INTAMU

2.27

2.3 Radio environment of an RCP in UMTS Modification procedure of the radio environment - 1

1. Are there SAs to be deleted from an LA of this RCP?

If YES: delete the declarations of these SAs (DELSAE).

2. Are there RNCs to be deleted from this RCP?

If YES: delete the declarations of these RNCs (DELRNC). delete the RCP RNC communication.

3. Are there RNCs to be added to this RCP?

If YES: create the RCP RNC communication. declare these RNCs (CRERNC).

4. Are there SAs to be added to an LA of this RCP?

If YES: declare these SAs (CRESAE).

RCP

SSP

BSC

RNC

LA

LA

LA

SA

SA

3G-MSC

LA

LA

2.28

2.3 Radio environment of an RCP in UMTS Modification procedure of the radio environment - 2

5. Has an LA stopped being adjacent for this RCP? If YES :

delete the declaration of this LA as an adjacent LA (DELAML, DELAVL). Is the corresponding RNC no more involved in the UMTS adjacent environment ?

If YES : delete the declaration of this RNC as an adjacent RNC (DELAMU). Has its MSC stopped being adjacent? if YES delete the RCP adjacent

MSC communication.

6. Has an LA become adjacent for this RCP? If YES, has its MSC become adjacent ?

if YES create the RCP adjacent MSC communication, then declare this LA as an adjacent LA indicating the MSC's GT (CREAML, CREAVL).

If NO declare this LA as adjacent (CREAML, CREAVL). Is the corresponding RNC involved in the UMTS adjacent environment ?

If YES : declarate this RNC as an adjacent RNC (CREAMU).

Points 5 and 6 must be repeated for all the affected LAs.

© Alcatel University – 8AS902001638VHZZA Ed.022.29

2 - Radio environment

2.4 GSM - UMTS interactions

2.30

2.4 GSM - UMTS interactionsService Handover 1

Service Handover description :

It might be useful for network operators to control handover between UMTS and GSM networks.

For example, speech call started on UMTS can be rerouted to BSS access network in order to save UMTS ressources for high rate data services.

Then a service handover information element is sent to the RNC which use it as an additional information in the handover decision process.

UMTS to GSM Service handover is available for : Speech (TS11 and TS12) GBS 20 (circuit data asynchronous general bearer services)

2.31

2.4 GSM - UMTS interactions Service Handover 2

Operator indicates the prefered behaviour

No service Handover (decision to be taken by RNC)

Handover to GSM should be performed

Handover to GSM should not be performed

Handover to GSM shall not be performed

UMTS to GSM Service handover is controled for SPEECH and GBS 20 by :

MODSHO PLMN = MCC MNC or 00000 SHBS20 = SH behaviour for BS20 services SHSPEECH = SH behaviour fo speech services SHDEL = Delete a MCC MNC from the list

2.32

2 - Radio environment Exercise

Exercise 1 : (20 mn)– Describing the radio environment

of an RCPExercise 2 : (1 H 20 mn)

– Updating Exercise 3 : ( 10 mn)

– Check the modifications made

Time allowed :

2 H 00 mn

2.33

2 - Radio environment Evaluation

Objective: to be able to configure the radio environment to suit the RCP

Thank you for answering the self-assessment

of the objectives sheet