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信令系统及七号信令介绍 PowerPoint PPT Presentation


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信令系统及七号信令介绍. 信令的基本概念和分类 No.7 信令系统概述 消息传递部分 ( MTP ) 电话用户部分( TUP ) 信令连接控制部分( SCCP ) 事务处理能力( TCAP ). 1.1 信令的基本概念和分类 通信协议的基本内容有: ① 规定在收发双方之间相互交换信息的表现形式; ② 为正确无误地将信息传送到对方所规定的控制规程。. 图 1-1 所示的是市话网中两分局用户电话接续时信令传送的示例。. 图 1-1 市话网中两分局用户接续示例. 1.2 信令的分类 1 .按信令的传送区域划分

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信令系统及七号信令介绍

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5716753


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No.7

MTP

TUP

SCCP

TCAP


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1.1


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1-1

1-1


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1.2

1


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2

,,


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3


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4


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1.2

1.2.1

1

2


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1.2.2

1

2


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2No.7

No.7


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1.4.2 No.7


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1No.7

No.7No.7Message Transfer PartMTPUser PartUP


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1-7 No.7


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OSI

OSI

OSI


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2OSINo.7

1

MTP

2

TUPNo.7

3


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4

TC

5

ISDNISUPTUP

6

7


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  • FISU

  • LSSU

  • MSU


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MSU:

MSUMSU272

F

CK

SIF

SIO

LI

FIB

FSN

BIB

BSN

F

The first transmitted bit

MSU

LI>2


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LSSU:

LSSULSSULSSUSF

F

CK

SF

LI

FIB

FSN

BIB

BSN

F

LSSU

Note: SF---- Status Field

The first transmitted bit

LI1~2


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FISU:

FISU

F

CK

LI

FIB

FSN

BIB

BSN

F

The first transmitted bit


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  • (F):

    • 01111110.

  • FISU


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(FSN, BSN):

(FSN)

(BSN)

(FIB, BIB):

FSN BSN, (FIB) (BIB) , 1,


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(LI):

LI0 byte: (FISU)

LI1 byte or 2: (LSSU)

LI>2 byte: (MSU)


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SIO

DCBA

DCBA

Sub-service

field

Service

indication

code

F

CK

SSF SI

SIF

SIO

LI

FIB

FSN

BIB

BSN

F

8 16 8n(n2) 8 2 6 1 7 1 7 8

The first transmitted bit


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1.4.4 No.7

1

No.7SPSTP

1SP

2STP

3


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2

1

2

3No.7

No.7HSTPLSTPSP


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2-13 No.7


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4

5

1

14


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2-14


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2

24

1-15


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1.5

1.5.1

1-16

1-17


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1-16


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1-17


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1.5.2

1

2

No.7CRC


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3

No.715ms

1

2


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1-18


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4

5

6

7


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2.5.3

No.7

1

1

2

3

3

2


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1-19

1-19


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2.6

1

2-20

2-20


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1

DPCOPCCIC32-21

2-21


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2

H0Hl

3

2

IAM


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2.6.2

1

1

2SAMSAO

3

4GRQGSM

5


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6

7

8

9

10

11


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2

1

2

2.6.3

1

1

2

3

4119110120


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ISUP


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2-26 119110120


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3

1

2

1

2


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1.7

1.7.1 SCCP

1SCCP

SSPSCP

MSCVLRHLR

ISDN


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MTP

SI416


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  • 2SCCP

  • SCCP

  • No.7


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1.7.2 SCCP

1

1

SCCPSub System NumberSSNSCCP

2

SCCPGlobal TitleGTSPCSSN


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2

SCCP4

1

0SCCPSLS

1SCCP


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2

2

3


2 7 3 sccp 2 41 sccp

2.7.3 SCCP2-41 SCCP


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1

DPCOPCSLSMTP3

2


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3

F

4

V

5

O


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1.7.4 SCCP

1SCCP

SCCPSCCPSCCP42-42


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2SCCP

SCCPSPCSSNGT

SPCMTPMTPDPCSIMTP

SSNSCCP

GT


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SCCPSCCP2-43

2-43 SCCP


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2-44

2-44


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  • GT0100GT2-45

2-45 GT=0100


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2.7.5

1

UDTXUDT

1

2-46 UDT


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2

3XUDT

4

2-47 XUDT


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2

2-48

1UDT1

2UDT2


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1.8

Transaction CapabilitiesTCTCAPTC-

1

TC2-49


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a. Component SublayerCSLAPDU

b.Transaction SublayerTSLTC-

2-49 TC


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  • 2

  • 1

  • 5

  • InvokeINV

  • -Return Result Not LastRR-NL

  • -Return Result LastRR-L

  • Return ErrorRE

  • RejectRJ


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2

3

4TC-

ID ID ID

ID

P-ABORT


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5

3

1TR-

TR-

ID P-Abort

TCTR2-16


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TC-

TR-

TC-UNI

TC-UNI

TC-Begin

TR-Begin

TC-Continue

TR-Continue

TC-End

TR-End

TC-U-Abort

TR-U-Abort

TC-P-Abort

TC-P-Abort

2-16 TCTR


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2

Begin

  • Continue

  • End

  • Abort


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1.8.3

TCSCCP

  • 2-50 TCMSUSCCP

TC


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1

TCInformation Element

2-51


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2-52

2-52


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1

Tag Class

Element Form

Tag Code

2-53


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2

  • 2-54


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2TC

2-55 TC


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