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.
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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.
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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
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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
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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
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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)
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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)
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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.
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