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Switching aND ROUTING Systems

Sisteme de comutatie si rutare (SCR)

 

Year:

                                   

III TST-E

Telecommunications Technologies and Systems

English language  

Course:

Professor Virgil Dobrota, Ph.D.

Laboratory:

Assistant Professor Bogdan Rus, Ph.D.

Assistant Robert Botez, Ph.D. student

Project:

Professor Virgil Dobrota, Ph.D.

 

>>>>>> 

C O U R S E S (Room 368)

Course 1:

03.03.26

8 am -10 am

 

* References

Chapter 1: Digital Switching

1. Type of Digital Switches

2. Single Stage Space-Division Switch

3. Classification of Multiple Stage Switches

Course 2:

10.03.26

10 am -12 pm

4. Multiple Stage Switch with Complete Permutation Paths (Clos)

5. Strictly Non-Blocking Three-Stage Clos Switch

6. Blocking Probabilities. Lee’s Method

7. Clos Network of IP Switches

Course 3:

17.03.26

8 am -10 am

8. Generalization of Clos condition

9. Multiple Stage Switches with Single Path (Banyan)

10. Batcher-Banyan Switches (optional)

Course 4:

24.03.26

8 am -10 am

11. Multiple Stage Switches with Multiple Path

12. Time-Division Switching: T

13. Time-Space-Division Switching: TS

Course 5:

31.03.26

8 am -10 am

14. STS Switch

15. TST Switch

16. TSSST Switch (optional)

17. Practical examples of telephone exchanges and switch fabrics (optional)

18. Switches in cloud (optional)

Course 6:

07.04.26

8 am -10 am

Chapter 2: Traffic Analysis

19. Characteristics of a Queuing System

20. Models for Clients Arrivals: Bernoulli, Poisson

Course 7:

14.04.26

8 am -10 am

21. M/M/1/∞ System

22. M/M/1/N System

TUTORIALS:

Queuing Systems with Poisson arrivals and services

Course 8:

21.04.26

8 am -10 am

23. M/M/m/∞ System. Erlang C Formula

24. M/M/m/m System. Erlang B Formula

 

TUTORIALS:

Queuing Systems with Poisson arrivals and services

Course 9:

28.04.26

8 am -10 am

25. M/D/m/∞ and M/D/1/∞ Systems

26. M/G/1/∞ System. Pollaczek-Khinchin Formula

27. Traffic Processing

 

TUTORIALS:

Queuing Systems with Poisson arrivals and services

Queuing Systems with Poisson arrivals, Poisson, Deterministic and General services

Course 10:

05.05.26

8 am -10 am

Chapter 3: Routing Algorithms

28. Basics of Routing: Definitions

Course 11:

12.05.26

8 am -10 am

29. Bellman-Ford Algorithm

30. Dijkstra’s Algorithm

Course 12:

19.05.26

8 am -10 am

31. Floyd-Warshall Algorithm (optional)

32. Comparison between Bellman-Ford, Dijkstra’s and Floyd-Warshall Routing Algorithms

33. Cost function

Course 13:

26.05.26

8 am -10 am

34. Optimal Routing

Course 14:

02.06.26

8 am -10 am

* Review

* Examples of subjects given at 2024-2025 exam

 

 

>>>>>> 

L A B O R A T O R I E S

(Rooms 211/A, 209)

Lab. 1:

04.03.26

8 am – 10 am

05.03.26

4 pm – 8 pm

1. Linux Installation

 

2331/1 (Room 211/A)

 

2331/2 (Room 209), 2331/3 (Room 209)

Lab. 2:

11.03.26

8 am – 10 am

12.03.26

4 pm – 8 pm

2. Introduction to Linux: working with files

Lab. 3:

18.03.26

8 am – 10 am

19.03.26

4 pm – 8 pm

3. Strictly Non-Blocking Three-Stage Clos Switch

4. Software Package for Designing Clos Switches

TUTORIAL:

Lab_3 (PowerPoint Presentation)

SOFTWARE RESOURCES:

Virtual machine + laboratory software packages

VMware Player Hypervisor (version 17.6.1)

Lab. 4:

25.03.26

8 am – 10 am

26.03.26

4 pm – 8 pm

5. Software Package for the Simulation of Rectangular Delta Switches  

6. Software Package for the Simulation of Rectangular Omega Switches

TUTORIAL:

Lab_4 (PowerPoint Presentation)

Lab. 5:

01.04.26

8 am – 10 am

02.04.26

4 pm – 8 pm

7. Multiple Stage Switch with Multiple paths (Benes)

8. Software Package for the Simulation of Benes Switches

TUTORIAL:

Lab_5 (PowerPoint Presentation)

Lab. 6:

08.04.26

8 am – 10 am

09.04.26

4 pm – 8 pm

9. STS Switch

10. Software Package for Designing STS Switches

TUTORIAL:

Lab_6 (PowerPoint Presentation)

Lab. 7:

15.04.26

8 am – 10 am

16.04.26

4 pm – 8 pm

11. TST Switch

12. Software Package for Designing TST Switches

TUTORIAL:

Lab_7 (PowerPoint Presentation)

Lab. 8:

22.04.26

8 am – 10 am

23.04.26

4 pm – 8 pm

Chapter 2: Traffic Analysis

13. Software Package for the Calculation of Binomial, Laplace-Gauss and Poisson Distributions

14. Software Package for the Calculation of Erlang B and Erlang C Formulas

TUTORIAL:

Lab_8 (PowerPoint Presentation)

Lab. 9:

29.04.26

8 am – 10 am

30.04.26

4 pm – 8 pm

15. Problems within Chapter 2 (Traffic Analysis)

TUTORIAL:

Lab_9 (PowerPoint Presentation)

Lab. 10:

06.05.26

8 am – 10 am

07.05.26

4 pm – 8 pm

16. Problems within Chapter 1 (Digital Switching) + Chapter 2 (Traffic Analysis)

TUTORIAL:

Lab_10 (PowerPoint Presentation)

Lab. 11:

13.05.26

8 am – 10 am

14.05.26

4 pm – 8 pm

Chapter 3: Routing Algorithms

17. Bellman-Ford Algorithm

TUTORIAL:

Lab_11 (PowerPoint Presentation)

Lab. 12:

20.05.26

8 am – 10 am

21.05.26

4 pm – 8 pm

18. Dijkstra’s Algorithm

19. Java Applet for Dijkstra’s Algorithm

TUTORIAL:

Lab_12 (PowerPoint Presentation)

Lab. 12:

27.05.26

8 am – 10 am

28.05.26

4 pm – 8 pm

Project defending

 

No other project defending will be organized during academic year 2025-2026 !!!

Lab. 14:

02.06.26

4 pm – 8 pm

Recovery Laboratory

No other recovery lab will be organized during academic year 2025-2026 !!!

 

 

>>>>>> 

P R O J E C T S (Room 211/A)

P1:

02.03.26

10 am – 2 pm

09.03.26

10 am – 2 pm

1. IPv4 Addressing

 

2331/2, 2331/3

 

2331/1

P2:

16.03.26

10 am – 2 pm

 

 

 

 

23.03.26

12 pm – 2 pm

2. Project subjects  

3. Project assignment (updated: 23.03.26)

4. Configuration example for PBX-IP Based Asterisk and VoIP terminals

SOFTWARE RESOURCES:

Project Demonstration

 

2331/1

P3:

30.03.26

10 am – 2 pm

06.04.26

12 pm – 2 pm

5. Working on project: SIP (1XYZ, 2XYZ) and IAX2 (3XYZ, 4XYZ) subscribers

6. Design recommendations

P4:

 

 

 

13.04.26

 

20.04.26

08 am – 10am

 

10 am – 12 pm

 

20.04.26

12 pm – 2 pm

7. Working for project: Implementation of SIP functions

(0/0.25/0.5/0.75/1 point)

 

Easter Holiday (to be rescheduled)

 

 

2331/3,08am–10am (instead of 13.04.26, 12pm-2pm)

2331/2,10am-12pm (instead of 13.04.26, 10am-12pm)

P5:

27.04.26

10 am – 2 pm

04.05.26

12 pm – 2 pm

8. Working for project: Implementation of IAX2 functions

(0/0.25/0.5/0.75/1 point)

P6:

11.05.26

10 am – 2 pm

18.05.26

12 pm – 2 pm

9. Working on project: Integration of SIP and IAX functions

 

 

 

P6:

25.05.26

10 am – 2 pm

Project recovery + Q&A

No other project recovery will be organized during academic year 2025-2026 !!!

 

Last update: 23 March 2026