SIGNALING SYSTEM 7 SSP STP SCP MTP SCCP ISUP INTELLIGENT NETWORK

Transcription

1 SIGNALING SYSTEM 7 SSP STP SCP MTP SCCP ISUP INTELLIGENT NETWORK CS-1 CS-2 CS-3 INAP CAMEL PINT Simon ZNATY, EFORT Etudes et FORmations en Télécommunication 1

2 Translated from French by : Loïc ABBES, Sébatien GARCIN, Simon ZNATY 2

3 Contents I Introduction...8 II The Intelligent Network...10 II.1 INTRODUCTION...10 II.2 PURPOSES AND PRINCIPLES OF THE INTELLIGENT NETWORK...10 II.3 CONCEPTUAL MODEL OF THE INTELLIGENT NETWORK...12 II.4 SERVICE PLANE...15 II.4.1 CS-1 services...15 II.4.2 CS-1 service features...20 II.4.3 Application to the Virtual Private Network service (VPN)...24 II Abbreviated dialing...25 II Authorization code...25 II Information operator...25 II Follow-me diversion...26 II Off-net access...26 II Off-net calling...26 II.4.4 CS-2 services...27 II Telecommunication services...27 II Service management services...28 II Service creation services...29 II.4.5 Service creation environments...30 II SCE requirements...30 II Description of an SCE...32 II Service creation environment requirements...34 II.5 GLOBAL FUNCTIONAL PLANE...37 II.5.1 Global functional plane for CS II SIB structure...37 II CS-1 SIBs...39 II CS-1 Points Of Initiation...52 II CS-1 Points Of Return...53 II Example of services described in the global functional plane...54 II.5.2 CS-2 Global functional plane...56 II BASIC CALL UNRELATED PROCESS SIB (BCUP), POIs and PORs 57 II CS-2 SIBs...58 II HLSIB...58 II Parallel service processing...58 II.5.3 Response of the manufacturers in SIB design...59 II.6 DISTRIBUTED FUNCTIONAL PLANE...61 II.6.1 Functional entities of the CS-1 distributed functional plane...61 II Call processing related functions...61 II Service related functions...62 II Management functions...62 II Relationships between the functional entities

4 II.6.2 SSF/CCF model...64 II SSF/CCF structure...64 II The call processing model...65 II User-BCSM interactions...71 II The IN-Switching State Model (IN-SSM)...73 II Sequence of events for a service...74 II.6.3 Translation of SIBs in the distributed functional plane...76 II Information flows associated to SIBs...77 II Event reporting...82 II Call setup and release...82 II Call party handling...83 II Call initiation...83 II Translation of POIs and PORs in the distributed functional plane...84 II SIB unrelated information flows...86 II.6.4 From the global functional plane to the distributed functional plane through an example...86 II.6.5 Functional entities of the CS-2 distributed functional plane...89 II.7 PHYSICAL PLANE...91 II.7.1 Physical entities...91 II.7.2 INAP protocol...97 II.7.3 Method for IN CS-1 service creation and introduction...99 II.7.4 Conclusion II.8 MEASUREMENT OF QUALITY OF SERVICE FOR THE INTELLIGENT NETWORK 101 II.8.1 Quality of service criteria II Distribution of busy hour call attempts (BHCA) II Traffic characteristics II Signaling traffic load II Call processing logic II Call processing data II Communication paths II New network components and functions II Additional complexity of traffic estimation II Redimensioning II.8.2 Dimensioning of the Intelligent Network II Determination of network load II Resource allocation and component dimensioning II.9 IN AND INTERNET II.9.1 PINT II Introduction II Interest of PINT II Example of Click-to-dial-back service scenario II Example of Click-to-fax service scenario II Example of click-to-fax-back service scenario II Examples of Voice-access-to-content service scenarios II Architectural concepts : implication of the PINT model within the intelligent network II Functional architecture for IN support of the Internet II Service description in the distributed functional plane II Problems encountered II And after?

5 II.9.2 WebIN II WebIN architecture II Update of the intelligent network databases from the Internet II Distribution of the service data within the intelligent network and the Internet II Share-out of the service logic (and data) between the intelligent network and the Internet II A fourth phase : triggering of IN services from the Internet II.9.3 Conclusion II.10 IN AND GSM : CAMEL II.10.1 The GSM standard II.10.2 CAMEL II.10.3 CAMEL architecture II.10.4 CAMEL phase 1 principles II Description of CAMEL O_BSCM II Description of CAMEL T_BSCM II Detection points II Call set up within a CAMEL integrated network: II Call reception within a CAMEL integrated network II Functionalities II.10.5 Additional functionalities of CAMEL phase II Specialized resources II Interaction between the service and the subscriber II Billing II Service security II Triggering and service logic optimization II CAMEL phase 2 architecture II Basic principles for the use of intelligent peripherals II.11 INTELLIGENT NETWORK EXERCISES II.11.1 Questions II.11.2 Answers III The signaling system N III.1 STRUCTURE OF A SIGNALING NETWORK III.1.1 Signaling modes III Associated mode III Nonassociated mode III Quasi-associated mode III.1.2 Signaling transfer point III.1.3 Signaling links III A link III B link III C link III D link III E link III F link III Signaling linkset III System performance III.2 SS7 PROTOCOL STACK

6 III.3 MTP III.4 MTP LEVEL III.4.1 MTP2 functions III Signal unit delimitation III Signal unit alignment III Error detection III Error correction III Initial alignment III Signaling link error monitoring III Flow control III.4.2 Signal unit format III Flags III Length indicator III Service information octet III Sequence numbering III Indicator bits III Check bits III Signaling information field III Status field III.5 MTP LEVEL III.5.1 Routing label III.5.2 Signaling message handling functions III Message discrimination and message distribution functions III Message routing function III.5.3 Routing in a signaling system n III.5.4 Load sharing III.5.5 Signaling network management III Signaling network management messages format III Signaling link management III Signaling traffic management and signaling route management functions 185 III.6 SCCP III.6.1 Services provided by the SCCP III.6.2 SCCP message structure III Connection request (CR) III Connection confirm (CC) III Connection refused (CREF) III Released (RLSD) III Data form 1 (DT1) III Data form 2 (DT2) III Expedited data (ED) III Reset request (RSR) III Protocol data unit error (ERR) III Inactivity test (IT) III UnitData (UDT) III Unitdata Service (UDTS) III Extended unitdata (XUDT) III Extended unitdata service (XUDTS) III.6.3 Addressing with SCCP III.7 ISUP III.7.1 ISUP message

7 III Circuit identification code III.7.2 Call set up III Initial Address Message (IAM) III Address complete message (ACM) III Answer (ANM) III Connection message (CON) III Subsequent address message (SAM) III Information request III Pass along and SCCP methods III Continuity check III Overload III Suspend and resume III Call progress (CPG) III Call release III Reset circuit (RSC) III.7.3 Voice / data circuits monitoring III Circuit group query III Circuits and circuit group blocking and unblocking III Circuit and circuit group reset III.7.4 Additional ISUP messages III.8 EXERCISES ABOUT SIGNALING SYSTEM N III.8.1 Questions III.8.2 Answers Bibliography Acronyms Keywords