Omf001006 sistema de sinalização gsm bssap(bss)

Sistema de Sinalização BSSAP(BSS) www.huawei.com

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

Re fe rê ncia s 

31033202-BSS Signaling Analysis Manual



GSM Specification 0808



GSM Specification 0408

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

Page2

Obje tivos 

Após o término deste curso, você estará apto a: 

Entender a estrutura da mensagem BSSAP



Distinguir mensagens BSSMAP e DTAP



Conhecer alguns elementos de mensagens BSSMAP e DTAP

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

Page3

Conte údo 1. Estrutura Funcional BSSAP 2. Menssagens Típicas 3. Detecção de Sinalização e Interface BSC

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

Page4

Loca liza çã o da BS S MAP no Dia gra ma de P rotocolo GS M MS

BTS

BSC

CM

MSC CM

BSSAP

MM

MM

RR

RR

L3

RR

BSSMAP

BTSM

BTSM

L2

LAPDm

LAPDm

LAPD

LAPD

L1

Sign.

Layer1

Sign.

Layer1

Sign.

Layer1

Sign.

Layer1

Um

BSSMAP

SCCP

SCCP

MTP

MTP

Abis

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

A

Page5

Es trutura Funciona l BS S AP To air interface transmission equipments

To other processes within BSC

BSSAP DTAP

BSSMAP

Distribution Function

Operation and Maintenance information for PLMN O&M centre BSS OMAP

To other application e.g. call control BSSAP DTAP

BSSMAP

Distribution Function

SCCP

SCCP

MTP

MTP A-Interface

BSS Copyright Š 2006 Huawei Technologies Co., Ltd. All rights reserved.

MSC

Page6

Operation and Maintenance information for PLMN O&M centre

BSS OMAP

Es trutura Funciona l BS S AP DTAP

MSC/VLR MM+CM(CC , SS , SMS)

RR BSC

BSSMAP

RR BTS

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

Page7

Abre via çã o da Es trutura Funciona l BS S AP 

BSSAP ： BSS Application Part 

BSSMAP ： BSS Management Application Part



DTAP ： Direct Transfer Part 

CM: Connection Management – CC: Call Control – SS: Supplementary Service – SMS: Short Message Service



MM: Mobile Management



BSS OMAP - BSS Operation and Maintenance Application Part



SCCP ： Signaling Connection Control Part



MTP ： Message Transfer Part

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

Page8

Funçã o da DTAP e BS S MAP 

DTAP 

DTAP é responsável pela transferência transparente de mensagens da L3 da MS para a MSC, ou da MSC para a MS que não serão analisadas pela BSC. É transferida entre BSS e MSC utilizando serviço classe 2 da SCCP (classe de conexão orientada básica)



BSSMAP 

A transmissão de mensagens BSSMAP na SCCP se dá para que entidades funcionais de MSC e BSS troquem informações.

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

Page9

Funçõe s de S ub-la ye r de Dis trubuiçã o 

Discriminar mensagens DTAP e BSSMAP



Distribuir as mensagens DTAP para o ponto de acesso da L2 do link de rádio



Convergir mensagens DTAP recebidas de um link de rádio da L2 para o link de sinalização da interface A.

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

Page10

Compone nte s de S ub-la ye r de Dis tribuiçã o DTAP Octet 1

Identifier

Octet 2

DLCI

Octet 3

Length Indicator

Octet 4

L3

BSSMAP Octet 1

Octet 2 Length Indicator Octet 3

Message

Octet L+2

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

Distribution Data Unit Length Indicator

L3

……..

……..

Octet L+3

Identifier

Message

Page11

L3 Messages

Compone nte s de Da dos de Us uá rio

I Distribution Data Unit User data

II Length Indication III L3 Information

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

Page12

Unida de de Dis tribuiçã o de Da dos do DTAP 

A Unidade de Distribuição de Dados tem dois parâmetros:



Discriminador : 00000001



Data Link Connection Identity （ DLCI ） : 

Indica o tipo de link de dados que deve ser usado na interface de rádio para as mensagens enviadas da MSC para BSC.



Indica o tipo de link de dados na interface de rádio que apresenta a mensagem enviada pela BSS para MSC. Bit:

8

7 6

Discriminator:

0

0

5 4

0 0 0

3 2

1

0 0

D

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

D=1 stands for transparent transmission (DTAP)

Page13

Unida de de Dis tribuiçã o de Da dos do BS S MAP 

As mensagens da Unidade de Distribuição de Dados do BSSMAP só tem o discriminador. ‘D’ deve ser igual a 0 que representa transmissão não-transparente.

Bit:

8

7 6

Discriminator:

0

0

5 4

0 0 0

3 2

1

0 0

D

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

D=0 stands for non-transparent transmission (BSSAP)

Page14

Conte údo 1. Estrutura Funcional BSSAP 2. Mensagens Típicas 3. Detecção de Sinalização e Interface BSC

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

Page15

Conte údo 1. Mensagens Típicas 2.1 Mensagem BSSMAP 2.2 Mensagem DTAP

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

Page16

Me ns a ge ns BS S MAP Messages Name

Messages are sent using the connectionless services of the SCCP

Direction

BLOCK

BSS to MSC

BLOCKING ACKNOWLEDGE

MSC to BSS

UNBLOCK

BSS to MSC

UNBLOCKING ACKNOWLEDGE

MSC to BSS

HANDOVER PERFORMED

BSS to MSC

HANDOVER CANDIDATE ENQUIRE

MSC to BSS

HANDOVER CANDIDATE RESPONSE

BSS to MSC

RESOURCE REQUEST

MSC to BSS

RESOURCE INDICATION

BSS to MSC

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

Page17

Me ns a ge ns BS S MAP Messages Name PAGING

Messages are RESET sent using the RESET ACKNOWLEDGE connectionless services of the OVERLOAD SCCP

Direction MSC to BSS Bi-direction Bi-direction Bi-direction

RESET CIRCUIT

Bi-direction

RESET CIRCUIT ACKNOWLEDGE

Bi-direction

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

Page18

Me ns a ge ns BS S MAP Messages Name

Messages are sent using the connection oriented services of the SCCP

Direction

ASSIGNMENT REQ

MSC to BSS

ASSIGNMENT COMPLETE

BSS to MSC

ASSIGNMENT FAILURE

BSS to MSC

HO Request

MSC to BSS

HO Required

BSS to MSC

HO Request Acknowledge

BSS to MSC

HO Command

MSC to BSS

HO Complete

BSS to MSC

HO Detected

BSS to MSC

HO performed

MSC to BSS

HO Failure

BSS to MSC

HO Required Reject

MSC to BSS

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

Page19

Me ns a ge ns BS S MAP Messages Name

Messages are sent using the connection oriented services of the SCCP

Direction

Clear Request

BSS to MSC

Clear Command

MSC to BSS

Clear Complete

BSS to MSC

Class Mark Request

MSC to BSS

Class mark Updated

BSS to MSC

Cipher Mode Command

MSC to BSS

Cipher Mode Complete

BSS to MSC

Cipher Mode Reject

BSS to MSC

Complete L3 Message

BSS to MSC

Paging

MSC to BSS

SAPI“n” Reject

BSS to MSC

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

Page20

Conte údo 1. Mensagens Típicas 2.1 Mensagem BSSMAP 2.2 Mensagem DTAP

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

Page21

Me ns a ge ns DTAP Messages Name

MM Messages

Direction

Authentication request

Network to MS

Authentication response

MS to Network

Authentication reject

Network to MS

CM Re-establishment request

MS to Network

CM service request

MS to Network

CM service accept

Network to MS

CM service reject

Network to MS

Identity request

Network to MS

Identity response

MS to Network

IMSI detach indication

MS to Network

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

Page22

Me ns a ge ns DTAP Messages Name

MM Messages

Direction

Location updating request

MS to Network

Location updating accept

Network to MS

Location updating reject

Network to MS

MM-Status

Bi-direction

TMSI reallocation command

Network to MS

TMSI reallocation complete

MS to Network

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

Page23

Me ns a ge ns DTAP Messages Name Call confirmed

Called MS to Network

Call proceeding

Network to Calling MS

Connect CC Messages

Direction

Connect acknowledge

Called MS to Network/ Network to Calling MS Network to Called MS/ Calling MS to Network

Emergency setup

MS to Network

Modify

Bi-direction

Modify complete

Bi-direction

Modify reject

Bi-direction

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

Page24

Me ns a ge ns DTAP Messages Name

CC Messages

Direction

User information

Bi-direction

Setup

Bi-direction

Disconnect

Bi-direction

Release

Bi-direction

Release complete

Bi-direction

Congestion control

Bi-direction

Notify

Bi-direction

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

Page25

Me ns a ge ns DTAP Messages Name

CC Messages

Direction

DTMF Start DTMF

MS to Network

Start DTMF acknowledge

Network to MS

Start DTMF reject

Network to MS

Status

Bi-direction

Status enquiry

Bi-direction

Stop DTMF

MS to Network

Stop DTMF acknowledge

Network to MS

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

Page26

Conte údo 1. Estrutura Funcional BSSAP 2. Mensagens Típicas 3. Detecção de Sinalização e Interface BSC

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

Page27

Me ios de De te cçã o de S ina liza çã o e Inte rfa ce da BS C 



Console de Manutenção da BSC 

Detecção de Interface GSM



Revisão de Detecção de Interface GSM



Detecção de Mensagem NO7



Revisão de Detecção de Mensagem NO7

Analisador de Sinalização 

MA10



KC1297

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

Page28

Compa ra çã o dos Dife re nte s Me ios 

Analisador de Sinalização 

Caro, investimentos adicionais necessários.



Pode detectar todas as sinalizações da interface A e Abis da camada física.



Detecção de Interface GSM 

Nenhum equipamento ou investimento adicional é necessário.



Detecção da Interface A – detectar BSSAP e SCCP na BSC.



Detecção da Interface A-bis – detectar mensagens da L3 desta interface



Detecção da Interface Um – detectar mensagens da L3 desta interface

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

Page29

Es pe cifica çõe s Re le va nts de GS M 

GM 0808 ： Interface A



GM 0858 ： Interface A-bis



GM 0408 ： Interface Um

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

Page30

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