omf001006 sistema de sinalização gsm bssap(bss)
TRANSCRIPT
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Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Sistema de Sinalização - BSSAP(BSS)
Page2Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Referências
31033202-BSS Signaling Analysis Manual
GSM Specification 0808
GSM Specification 0408
Page3Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Objetivos
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
Page4Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Conteúdo
1. Estrutura Funcional BSSAP
2. Menssagens Típicas
3. Detecção de Sinalização e Interface BSC
Page5Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Localização da BSSMAP no Diagrama de Protocolo GSM
BSSAPCM
MM
RR
LAPDm
Sign. Layer1
L3
L2
L1
BTSM
MS
Um
SCCP
MTP
BTSM
RR BSSMAP
Abis
BTS MSC
A
BSC
Sign.
Layer1
Sign.
Layer1
Sign.
Layer1
RR
LAPDLAPDm LAPD
CM
MM
BSSMAP
SCCP
MTP
Page6Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Estrutura Funcional BSSAP
BSS
BSSAP
SCCP
DTAP BSSMAP
Distribution Function
BSSAP
SCCP
DTAP BSSMAP
A-Interface
MSC
MTP MTP
To air interface transmission equipments
To other processes within BSC
Distribution Function
To other application e.g. call control
BSSOMAP
BSSOMAP
Operation and Maintenance information for PLMN O&M centre
Operation and Maintenance information for PLMN O&M centre
Page7Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Estrutura Funcional BSSAP
BTS
BSC
DTAP
MM+CM(CC , SS , SMS)
MSC/VLR
RR
RR
BSSMAP
Page8Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Abreviação da Estrutura Funcional BSSAP
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
Page9Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Função da DTAP e BSSMAP
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.
Page10Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Funções de Sub-layer de Distrubuição 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.
Page11Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Componentes de Sub-layer de Distribuição
Octet 1
Octet L+2
Octet 3
Octet 2
Octet 1
Octet 2
Octet 3
Octet 4
Octet L+3
DTAP BSSMAP
Identifier Identifier
DLCI
Length Indicator Length Indicator LengthIndicator
L3 L3
Message Message
……
..
L3 Messages
Distribution Data Unit
……
..
Page12Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Componentes de Dados de Usuário
III L3 Information
User data
I Distribution Data Unit
II Length Indication
Page13Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Unidade de Distribuição de Dados 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.Discriminator:
Bit: 8 7 6 5 4 3 2 1
0 0 0 0 0 0 0 DD=1 stands for transparent transmission (DTAP)
Page14Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Unidade de Distribuição de Dados do BSSMAP
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.
Discriminator:
Bit: 8 7 6 5 4 3 2 1
0 0 0 0 0 0 0 DD=0 stands for non-transparent transmission (BSSAP)
Page15Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Conteúdo
1. Estrutura Funcional BSSAP
2. Mensagens Típicas
3. Detecção de Sinalização e Interface BSC
Page16Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Conteúdo
1. Mensagens Típicas
2.1 Mensagem BSSMAP
2.2 Mensagem DTAP
Page17Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Mensagens BSSMAP
BSS to MSCRESOURCE INDICATION
MSC to BSSRESOURCE REQUEST
BSS to MSCHANDOVER CANDIDATE RESPONSE
HANDOVER CANDIDATE ENQUIRE
HANDOVER PERFORMED
UNBLOCKING ACKNOWLEDGE
UNBLOCK
BLOCKING ACKNOWLEDGE
BLOCK
Messages Name
MSC to BSS
BSS to MSC
MSC to BSS
BSS to MSC
MSC to BSS
BSS to MSC
Direction
Messages are sent using the connectionless services of the SCCP
Page18Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Mensagens BSSMAP
RESET CIRCUIT ACKNOWLEDGE
RESET CIRCUIT
OVERLOAD
RESET ACKNOWLEDGE
RESET
PAGING
Messages Name
Bi-direction
Bi-direction
Bi-direction
Bi-direction
Bi-direction
MSC to BSS
Direction
Messages are sent using the connectionless services of the SCCP
Page19Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Mensagens BSSMAP
MSC to BSSHO Required Reject
BSS to MSCHO Failure
MSC to BSSHO performed
BSS to MSCHO Detected
BSS to MSCHO Complete
MSC to BSSHO Command
HO Request Acknowledge
HO Required
HO Request
ASSIGNMENT FAILURE
ASSIGNMENT COMPLETE
ASSIGNMENT REQ
Messages Name
BSS to MSC
BSS to MSC
MSC to BSS
BSS to MSC
BSS to MSC
MSC to BSS
Direction
Messages are sent using the connection oriented services of the SCCP
Page20Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Mensagens BSSMAP
BSS to MSCSAPI“n” Reject
MSC to BSSPaging
BSS to MSCComplete L3 Message
BSS to MSCCipher Mode Reject
BSS to MSCCipher Mode Complete
Cipher Mode Command
Class mark Updated
Class Mark Request
Clear Complete
Clear Command
Clear Request
Messages Name
MSC to BSS
BSS to MSC
MSC to BSS
BSS to MSC
MSC to BSS
BSS to MSC
Direction
Messages are sent using the connection oriented services of the SCCP
Page21Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Conteúdo
1. Mensagens Típicas
2.1 Mensagem BSSMAP
2.2 Mensagem DTAP
Page22Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Mensagens DTAP
MS to Network
IMSI detach indication
MS to
Network
Identity response
Network to
MS
Identity request
Network to MS
CM service reject
CM service accept
CM service request
CM Re-establishment request
Authentication reject
Authentication response
Authentication request
Messages Name
Network to
MS
MS to
Network
MS to
Network
Network to
MS
MS to
Network
Network to
MS
Direction
MM Messages
Page23Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Mensagens DTAP
TMSI reallocation complete
TMSI reallocation command
MM-Status
Location updating reject
Location updating accept
Location updating request
Messages Name
MS to
Network
Network to
MS
Bi-direction
Network to
MS
Network to
MS
MS to
Network
Direction
MM Messages
Page24Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Mensagens DTAP
Bi-directionModify reject
Bi-directionModify complete
Bi-directionModify
Emergency setup
Connect acknowledge
Connect
Call proceeding
Call confirmed
Messages Name
MS to Network
Network to Called
MS/
Calling MS to
Network
Called MS to
Network/
Network to Calling
MS
Network to Calling
MS
Called MS to Network
Direction
CC Messages
Page25Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Mensagens DTAP
Bi-directionNotify
Congestion control
Release complete
Release
Disconnect
Setup
User information
Messages Name
Bi-direction
Bi-direction
Bi-direction
Bi-direction
Bi-direction
Bi-direction
Direction
CC Messages
Page26Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Mensagens DTAP
Network to MSStop DTMF
acknowledge
Stop DTMF
Status enquiry
Status
Start DTMF reject
Start DTMF
acknowledge
DTMF Start DTMF
Messages Name
MS to Network
Bi-direction
Bi-direction
Network to MS
Network to MS
MS to Network
Direction
CC Messages
Page27Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Conteúdo
1. Estrutura Funcional BSSAP
2. Mensagens Típicas
3. Detecção de Sinalização e Interface BSC
Page28Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Meios de Detecção de Sinalização e Interface da BSC
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
Page29Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Comparação dos Diferentes Meios
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
Page30Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Especificações Relevants de GSM
GM 0808: Interface A
GM 0858: Interface A-bis
GM 0408: Interface Um