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  1. 1. . DRAFT AFRALTI WORKSHOP INITIAL BASIC PROJECT SUBMITTED BY AIRTEL TELETRAFFIC ENGINEERING WORKSHOP:GSM Cellular Network; NGN; High Speed Network, QoS of IP and 3G Network New Challemges Montevideo, November 2004 RATIONALE To provide an overview of basic teletraffic theory for GSM and fixed voice and data networks; To highlight optimal dimensioning, optimal traffic routing and performance characterization of mobile and fixed voice and data networks; To examine the evolution of wireline dimensioning methods; To evaluate the impact of GPRS on GSM QoS ; To evaluate the impact of new traffics and NGN related to QoS new definitions and measurements. AUDIENCE The course is designed for telecommunications networks engineers, networks planners and managers. PREREQUISITES (Assumed prior knowledge) This course assumes a basic background in calculus, in non-linear optimization , in applied probabilities and networks modeling based on elementary graphs theory.
  2. 2. COURSE OBJECTIVES The objectives of this course are to give to the audience: - A deep appreciation of basic teletraffic concepts and notions; - An overview of the state of the art classical and current state of teletraffic engineering theory; - Tools to highlight the relations between practical, feasible and theoritical aspects of teletraffic methods in networks design feasible and viable ; - Fundamental notions and steps in mobile and fixed network planning; - Fundamentals of fixed and mobile networks dimensioning and routing optimization; - Modeling and algorithmic tools to solve the associated problems ; - Relevant approaches to deal with up-to-date teletraffic models taking into account the new class of traffic; - New Generation Networks (NGN) Quality of Service paradigms; - Optimal dimensioning of networks subject to Grade of Service constraints or Budget constraints. 1) INTRODUCTION : 1.1 Context 1.2 Mobile networks design performance goals : Quality of service factors Goals choice Specific performance goals Quality of service measures 1.3 GSM network design optimization process 2 ) NETWORKS ARCHITECTURES 2.1 Fixed hierarchical networks, fixed non-hierarchical networks
  3. 3. 2.2 A particular hierarchical network: the cellular network 2.3 Non-hierarchical networks 2.4 CAPLAN training session 3) MODELING 3.1 Cellular networks modeling 3.2 Architecture and traffic routing models 3.3 Hand-off traffic routing models; directed retry traffic routing models 3.4 CAPLAN training session 3.5 Network planning process survey 3.6 Hand-off traffic vs overflow traffic : analogy 4) BASIC TRAFFIC CONCEPTS 4.1 Erlang B and Erlang C survey 4.2 Smith and Smith loss formula 4.3 Call congestion , Time congestion : Fundamentals ; Poissonnien traffic ; non-Poissonnien traffic; total traffic lost vs. total offered traffic ; 4.4 Blocking probability : Kaufmann and Labourdette formulas 4.5 Erlang B vs. Erlang C 4.6 Erlang C modeling and repeated calls 4.7 Cellular networks traffic forecast: fundamentals ; Kruithof algorithm 4.8 Caplan training session 5) CELLULAR NETWORKS DIMENSIONING 5.1 Dimensioning: fundamentals, access network dimensioning
  4. 4. 5.2 Erlang B marginal occupancy vs.Erlang C marginal occupancy 5.3 Erlang C numerical approximation 5.4 Inter MSC hierarchy 5.5 Non Hierarchical MSCs set 5.6 Hierarchical cell structure (HCS) Dimensioning: Fundamentals, basic model and generalization; 5.7 C/I analytic modeling 5.8 CAPLAN training session 6) NGN DIMENSIONING APPROACHES : Data Networks 6.1 PSTN-NGN migration: the state of art ; paradigms 6.2 New traffics: modeling ; 6.3 Dimensioning high-speed networks: fundamentals; various methods; 6.4 IP Quality of Service concepts; 6.5 Impact of GPRS on GSM Quality of Service; 6.6 GSM Networks (SMS, MMS, GPRS): SDCCH-TCH dimensioning model; 6.7 GSM Network Multi-hour Dimensioning 6.8 GSM Load Sharing Optimization 6.9 UMTS: voice and data load sharing model 6.10 CDMA dimensioning model: ECCS-B method extension. 6.11 Caplan Training session 6.12 Antenna positioning optimization: models and examples
  5. 5. 6.13 analogous traffic matching coefficients in fixed or mob ile networks dimensioning: fixed hierarchical and non-hierarchical, GSM, hierarchical cell structure, CDMA 6.14 Network case study with CAPLAN