Modeling and Dimensioning of Networks

Lecturer:

Tutor:

Supervisor:

Department of Telecommunications Engineering

Synopsis:

The aim of the course is to present an overlook of dimensioning of telecommunications net-works on the basis of results of the queuing theory (QT). Introduce possibilities of simulation and modeling networks both from the point of view of grade of service GoS and quality of service QoS as well. Results of the QT are applied on different service systems and telecommunication networks deploying and operating at time being. Theoretical knowledge about models of service systems can be utilized for dimensioning of different service systems in real life - not only on the telecommunications one.

Requirements:

The Examination:

-has two parts - written and oral,

-the written part consists of ten randomly selected questions for each student,

- the oral part is focused on the discussion about the written preparation (if the written answer is not intelligible),

- to pass the exam, it is necessary to successfully answer at least five questions out of ten (classification E).

Award grade requirements:

Hand in and defending errorless project and the numerical results of examples.

Syllabus of lectures:

1. Modeling of telecommunication networks (TN), queueing theory. Types of service systems (SeSy).

2. Mathematical model of service system, Kendall's notation.

3. Flow of demands, characteristics, mathematical specification. Poisson's flow, nature and character.

5. Parameters of service system.

5. Models M/G/N/0 specification, parameters GoS. Dimensioning.

6. Telecommunication network dimensioning. Overflow traffic - characteristics - dimensioning of SS.

7. Models M/M/N/inf./FIFO (RANDOM, LIFO), parameters GoS.

8. Models M/M/N/R, specification, parameters GoS. Dimensioning.

9. Models G/M/N/, M/G/N/ and G/G/N/. Application in UMTS networks.

10. Quality of service (QoS, GoS, NP). Dependability, availability and reliability of item and network.

11. Modeling of SS and TN. Matlab, SimEvents.

12. Priority SeSy. Application in practice, models of queueing discipline and memory organisation (packet networks, PQ, CQ, LLQ, FQ, WFQ).

13. Service systems - models and methods of overload protections.

14. Traffic forecast methods, regression functions. Summary of the theory of loss and waiting SeSy for practical applications.

Syllabus of tutorials:

1. 6. 10. Introduction to seminars. Network topology optimisation. Input information on project.

2. 13. 10. Free time.

3. 20. 10. Free time.

4. 27. 10. Free time.

5. 3. 11. Free time.

6. 10. 11. Lab: Loss SS - dimensioning - models M/G/N/0.

7. 17. 11. Free time.

8. 24. 11. Lab.: Application of G/M/N, M/G/N and G/G/N models in TN networks.

9. 1. 12. Free time.

10. 8. 12. Lab.: Dimensioning nonpriority SS with waiting, application of M/M/N/R model using MATLAB.

11. 15. 12. Lab.: Introduction to SimEvents simulator. Simulation of M/M/N/R SS.

12. 22. 12. Free time.

13. 5. 1. Lab.: Influence of QD (FIFO, WFQ, CQ, PQ) on QoS in packet network.

14. 12. 1. Applications of generalized Erlang's model for dimensioning. Summary of seminars. Assessment.

Study Objective:

The aim of the course is to present an overlook of dimensioning of telecommunications net-works on the basis of results of the queuing theory (QT). Acquired knowledge applied in individual project dimensioning of data network.

Study materials:

[1] Křížovský, F., Kříž, P. Šťastný, M, Vaněk, N. Provozní zatížení v telekomunikacích - ne-publikováno. Kapitoly 1 - 5. http://moodle.kme.fel.cvut.cz

[2] Gross, D., Harris, C., M. Fundamentals of queuing theory. Third Edition. New York, Lon-don: J. Wiley and Sons, 1998. 439 p. ISBN 0-471-17083-6

[3] Villy B. Iversen. Teletraffic Engineering and Network Planning. Geneva: ITC in cooperati-on with ITU-D SG2, May 2010. ftp://ftp.dei.polimi.it/users/Flaminio.Borgonovo/Teoria/teletraffic_Iversen.pdf, 623 p.

[4] Amir Ranjbar. CCNP ONT Official Exam Certification Guide. Cisco Press; Har/Cdr editi-on, 2007. 408 p. ISBN-10: 1587201763, ISBN-13: 978-1587201769

[5] http://www.itu.int/rec/T-REC/e

Note:

Further information:

https://moodle.fel.cvut.cz/courses/AD2M32MDS

No time-table has been prepared for this course

The course is a part of the following study plans:

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• Kybernetika a robotika - Systémy a řízení_145356 (elective course)
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• Otevřená informatika - Počítačové inženýrství_145440 (elective course)
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