Telefocal Asia - Independent training, consulting and research firm focusing on wireless and fixed telephony, data communications, transmission engineering, switching, cell planning, telecommunications, network management, service applications, fibre certifications, fibre technician and inside outside plant fibre.

Course Date & Venue
27 June - 01 July 2010 (Sun - Thu) 5-day instructor-led training , 0900 - 1700 Dubai, UAE
Course Objectives
The goal of this training is to present details and analysis of the Network Switching Subsystem of GSM, including its interfaces, protocols, signaling and applications. The participants will become familiar with GSM NSS components, signaling flows,SS7 and its debugging and its other services such as SMS service. The participants will learn about practical usage of NSS traces and be able to use it in daily operations and maintenance as well as in network troubleshooting. In addition they will also be able to understand the forecasting mechanism and cover aspects of performance management to help them develop insight in the KPIs.
Course Overview
Core network architecture Interface Signaling, CAS & SS7 Call flows SS7 stack MAP signalling QoS & Performance management Case studies
Key Benefits
In-depth understanding of core network architecture Core network issues and troubleshooting and performance degradation Tracing and issue resolution Dimensioning criteria
Pre-Requisites for Participants
Engineering background with familiarity with GSM network architecture.
Who Should Attend?
Engineering planners, managers, senior managers, operations engineers, managers and senior managers, NOC team.
Course Outline
Introduction to GSM Interfaces/ Protocols GSM Numbering Plan GSM Mobile Service Management GSM Security Management GSM Interfaces A Interface; B Interfaces; C and D Interfaces; E Interface; F Interface; Concept of E1/T1/STM-1, STM-xx, ATM, IP Fundamental Loss Models Erlang B formula, traffic load Erlang Loss Model (M/M/m/m) and Blocking Probability Calculation Engset Loss Model (M/M/m/m/K) and Dimensioning Curves Detailed Examples of Application of Loss Models (e.g; FDMA/TDMA/CDMA systems) Intermediate Queuing Theory Renewal Processing and Residual Lifetime General Service Time (M/G/1) and P-K Formula General Arrival Rate (using Embedded Markov Chains) Detailed Examples of Applications of Intermediate Queuing Models NSS Dimensioning (Voice) Forecasting Key influencing factors Dimensioning methodology Subs forecasting Subs roll out Traffic modelling Traffic loading Geographical distribution Distribution matrix Network topology, MGW interfaces & dimensioning MSS interfaces & dimensioning HLR interfaces & dimensioning Dimensioning assumptions SPoF avoidance Planning for special events NSS voice KPIS A interface dimensioning Inter-MSC trunk dimensioning Intra-MSC trunk dimensioning Congestion control Overflow control and re-routings Migration plans Formulas and KPI reconciliation KPI reporting and PM Expansions and capacity building Traffic balancing Link monitoring and escalation thresholds Processes and procedures Reporting for special events Packet core dimensioning Traffic model & QoS SGSN planning and dimensioning GGSN planning and dimensioning Gb & Gi interface planning and dimensioning Session activation & attachment Inter and Intra SGSN RA KPIs for success rates and failure reporting Classic and evolution features SPoF avoidance Case studies for Voice and packet data growth Call Signaling Flow; Mobility Management Service; Security Management Service; Error Recovery Management; Call Control Management Service; GSM Signaling Flow Exercises; No. 7 Signaling System SS7 Overview: CAS and CCS7 Protocol Stack; MTP1 Layer; MTP2 Layer; MTP3 Layer; Application Layer; Network Architecture and Elements; SP and STP Concepts; OPC and DPC Nodes; Signaling Routing Analysis Signaling Connection Mode ISUP Signaling ISUP Message Flow; Signaling Units: FISU, LSSU and MSU; ISUP detailed IAM, ACM Analysis; ISUP detailed ANM, REL Analysis; SS7 MTP3 Exercises; ISUP Call Set-up Exercises; Introduction to SCCP and GT Routing Function of SCCP; Limitation of MTP3; Circuit/ Non-circuit Related Signaling; DTAP Messages BSSMAP Messages SSN Introduction SCCP Addressing GT Routing/ Number Analysis GT Case Studies/ Signal Flow SCCP Messages SCCP Addressing Exercises; GT Routing Exercises; GSM TCAP Layer TCAP Dialogues; TCAP Transaction; TCAP Application: Location Update; TCAP Trace Analysis; TCAP Protocol Exercises; GSM MAP Signaling GSM Functional Services; BSSAP Signaling SCCP Modes BSSMAP Analysis DTAP Analysis MAP Protocol Services MAP Protocol Version SCTP adaptation layers SIGTRAN protocol stack, IN Basics IN drivers & objectives IN services & market IN Architectural Principles PSTN/POTS & SS7 basics First IN architecture IN evolution IN Standards Framework Standards bodies overview ITU-T Q.1200 IN series IN Conceptual Model (INCM) IN Capability Set 1 - Services Definitions Service modelling Functional architecture INAP Overview of SS7/ SCCP Routing Understanding GSM MAP Signaling Basic GSM SMS Theory Analysis & optimization GT analysis SS7 traces and analysis SMS trace and analysis Root cause analysis KPI anlaysis