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Overview
In fixed line telecommunications systems, the location of the calling and
called parties is derived from the numbering scheme adopted in the network.
However in wireless systems the situation is different because a subscriber
can roam across the coverage areas, which in the case of GSM/DCS are multiple
countries typically. For incoming mobile calls there is no direct translation
between the number of the mobile handset and the location of the customer.
Procedures are therefore required to determine the location of a called
customer on a real-time basis to allow delivery of incoming calls.
MAP provides core cellular network functionality - for example the functionality
to route calls to and from mobile subscriber or messaging be it Short
Message Service (SMS), Enhanced Messaging Service (EMS) or
Multimedia Messaging Service (MMS). The US version is known as
ANSI41-MAP. The international version is known as GSM-MAP. |
Prerequisites
The course assumes that the delegates are familiar with signalling system #7 (C7/SS7) and basic
telecommunication concepts. It is recommended that previous attendance at
the 5-Day SS7/C7 to Binary Level (course code SS7-B) have been made, although this is not compulsory. |
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Training Method
- Lectures
- Exercises
- Demonstrations
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Course Details
- Duration: Two Day
- Language: English
- Documentation: English
- Participants: Generally class of five on a public course
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Learning Outcomes
- Knowledge of C7/SS7 Architecture Including Signaling Points and Links
- Understand signalling and its importance in cellular networks
- Know what the components of the C7 network are and what their function is
- Understand Point Code structure and how Point Code routing is used in GSM
- Know how the role of SCCP and TCAP in relation to MAP
- Explain SCCP addressing methods including Global Title Translation and associated parameters
- Know the SCCP and TCAP messages and parameters used by MAP and their function
- Recognise the C7 protocols used in GSM and identify their functions
- Understand the PLMN Architecture
- Be familiar with GSM network interfaces and signalling protocols
- Know what C7 protocol stack is at each GSM NSS component and what C7 protocol is used on each GSM interface
- Know what numbering identifiers are used in GSM
- Explain common sequence flows such as those for mobile originated calls as well as mobile terminated calls
- Understand how MAP performs its functions
- Understand MAP procedures
- Know all Phase 2 MAP operations and their functions
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Who Should Attend
- Those requiring a general outline of the Network Switching Subsystem (NSS)
and the signalling protocols that operate over its interfaces.
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Presenter Details
The course is delivered by Lee Dryburgh lead
author of "SS7/C7 Protocol, Architecture and Applications". |
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Course Contents |
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DAY 1 GSM Centric C7 Overview
- What is Signaling?
- Signalling System #7 Network Elements
o Service Switching Point (SSP)
o Signal Transfer Point (STP)
o Service Control Point (SCP)
o Links and Linksets Explained
o Link Set Types Explained
o Routesets Explained
o Associated and Quasi-Associated Signalling
o Route And Routesets
o Link Types
o Plain Flavour Stack
- Signalling System #7 Overview
- Signalling System #7 Protocol Architecture
o Message Transfer Part 1 (MTP 1)
- E1 and TDM Hierarchy
o Message Transfer Part 2 (MTP 2)
- MTP2 Overhead and Functions
- SUs and SU Formats
- SUs Generated by Layer
o Message Transfer Part 3 (MTP 3)
- MTP3 Overhead and Functions
- SIO and Subfields
- C7 Network Hierarchy
- The ITU Routing Label Shown
- ITU Point Code Format Explained
- National Point Codes Explained
- ANSI Routing Label Shown
o ISDN User Part (ISUP)
- ISUP Messages
- Call setups/clear downs shown
o Signalling Connection Control Part (SCCP)
- Capabilities
- Overhead
- GSM-MSC Stack
- Architecture
- Protocol Classes
- Message Structure
- Messages
- Addressing
- DPC+SSN Routing
- ITU and GSM Subsystems
- Global Title Routing
- MTP Addressing in GSM
- GT Addressing in GSM
- MAP SCCP Addressing
- CgPA and CdPA Parameters
- Inter and Intra PLMN Addressing
- CgPA and CdPA Decode
- Subsystem Management
- C7 and Cellular Protocol Standards Bodies
- Tutorial #1
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DAY 2 GSM-NSS Specific Signalling
- Transaction Capabilities Application Part (TCAP)
o Users and Services
o Addressing
o Internal Structure
o Message Format
- Component Sublayer
- Transaction Sublayer
o Messages used in GSM
o MAP and TCAP
- GSM Network Components
o OSS, NSS, BSS
o MS, SIM, BTS, BSC, MSC, HLR, VLR, EIR
- GSM Identifiers
o IMEI, IMSI, TMSI, MSISDN
- Protocol Stack by GSM Node Type
- Interfaces A-H
- MSC Protocols
- Mobile Application Part (MAP)
o Introduction to GSM-MAP
o Operation Encapsulation
o MAP SCCP Addressing Outcomes
o C7 Protocols on GSM Interfaces
o Example MAP Operations on GSM Interfaces
- B-D Interfaces
- E-H Interfaces
o MAP Procedures
- Common Services
- Mobility
- Operations and Maintenance
- Call Handling
- Supplementary Services
- Short Message Service
o MAP Operations
- B-Interface
- C-Interface
- D-Interface
- E-Interface
- F-Interface
- G-Interface
- H-Interface
o Communication Between MAP and its Users
o Local Operation Codes for MAP
o Communication Between Application, MAP and TCAP
- Tutorial #2
- Practical Session
- Analysis of MAP traffic
- Practical Exercises
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