GSM - Signaling & Protocol Analysis
(The Core Network)

The GSM-Network and its Features

The GSM-Network Architecture
Tasks and functions of BSS, MSC, IWF, VLR, HLR, EIR, SMS-SC, Voicemail.
Features of GSM
Functional Description of national and international roaming, Mobile Originating Call (MOC), Mobile Terminating Call (MTC), Interworking with data networks, Short Message transfer in mobile originating and mobile terminating direction (SMS), Supplementary Service features and Supplementary Service (SS) handling.
The Future of GSM
Introducing GPRS, EGPRS and UMTS
Practical and Interactive Exercises

The SS7-Network
Tasks, functions and differences between SP’s, SCP’s and STP’s, the IN-concept.
The SS7-Protocol Stack
Introduction and differentiation of MTP 1 – 3, ISUP, TUP, SCCP, TCAP, MAP
The Message Transfer Part (MTP 1 – 3)
Functional description and procedures, FISU, LSSU, MSU, Routing Label.
SS7 Network Management and Network Test
Functional description and procedures, message format and message types
The ISDN User Part
Functional description and procedures, message format and message types, important parameters for call setup and release
The Signaling Connection Control Part (SCCP)
Functional description, the SCCP-subsystems, message format and message types, connection-less and connection-oriented services, SCCP-parameter description.
Practical and Interactive Exercises
Error Analysis of Real Life Recording Files for MTP 3, ISUP and SCCP

Transaction Capabilities Application Part (TCAP)
Functional description, parameter encoding and classes (primitives vs. constructors), strutcured dialog vs unstructured dialog, introduction to ASN.1 encoding, message format and message types, dialog portion, component portion, adressing principles of TCAP.
Mobile Application Part (MAP)
Functional description, common and special MAP-services (MAP-DELIMITER, MAP-OPEN, MAP-CLOSE, MAP-U-ABORT, MAP-P-ABORT, MAP-NOTICE), local operation codes for GSM, interaction between application, MAP and TCAP.
Practical and Interactive Exercises
Analysis of Real Life Recording Files for TCAP and MAP

CAMEL Basics
Phase 1, Phase 2, Phase 3 functional description, features and architecture (gsmSSF, gsmSRF, gsmSCF)
CAP (Camel Application Part)
Procedures for Mobile Originating and Mobile Terminating Calls, procedures for SMS, procedures for pre-paid services.
Practical and Interactive Exercises
Analysis of Real Life Recording Files for CAMEL

Registration and Location Updating
(Intra-PLMN and Inter-PLMN with CAMEL-Interworking)
Mobile Originating Call Setup
(Intra-PLMN and Inter-PLMN with CAMEL-Interworking for pre-paid services)
Mobile Terminating Call Setup
(Intra-PLMN and Inter-PLMN with CAMEL-Interworking)
Inter-MSC Handover and Subsequent Handover Function
Short Message Transfer
(subscriber reachable and non-reachable)
Supplementary Services Handling
(Activation, Registration and Interrogation)
Practical and Interactive Exercises
Analysis of Real Life Recording Files for the different scenarios

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