Workshop on Advances in Communication Technologies 2015 organized by VSB-Technical University of Ostrava, Room NA178, April 15-16, 2015, 9AM

This workshop is supported by the project No. CZ.1.07/2.3.00/20.0217 "The Development of Excellence of the Telecommunication Research Team in Relation to International Cooperation" within the frame of the operation programme "Education for competitiveness" financed by the Structural Funds and from the state budget of the Czech Republic.


Invited Speaker: Homero Toral-Cruz, University of Quintana Roo, México
Delivering lecture on: QoS Parameters Modeling of Self-similar VoIP Traffic
Abstract: The voice quality of VoIP systems depends on many QoS parameters. Particularly, jitter and Packet Loss Rate (PLR) have an important impact on voice quality. To achieve the satisfactory voice quality, the VoIP applications must be designed by using representative traffic models. In order to implement representative traffic models it is necessary to monitor the QoS parameters, by means network measurements.On the other hand, studies of real teletraffic data in modern computer networks have shown that: ) IP traffic exhibits self-similar and heavy-tail nature, (2) Packet loss is bursty in nature and exhibits a finite temporal dependency.In this lecture, it is shown that VoIP jitter can be modeled by alpha-stable distribution and self-similar processes with Short Range Dependence (SRD) or Long Range Dependence (LRD). Practically speaking, the implication of these behaviors for VoIP and other interactive multimedia services is that receiver de-jitter buffer may not be large enough to mask the jitter with LRD and alpha-stable characteristics. These models can be used to: (1) to design a de-jitter buffer, and (2) to implement a synthetic generator of VoIP jitter data traces, where the synthetic jitter dada traces can be used as test vectors to carry out the performance evaluation of a de-jitter buffer of VoIP system.

Invited Speaker: Peppino Fazio, University of Calabria, Italy
Delivering lecture on: Networking in vehicular networks: Overview on VANETs and routing optimization
Abstract: Recently, distributed mobile wireless computing is becoming a very important communications paradigm, due to its flexibility to adapt to different mobile applications. As many other distributed networks, routing operations assume a crucial importance in system optimization, especially when considering dense urban areas, where interference effects cannot be neglected. To enable communications within an ad-hoc network, characterized by continuous node movements, routing protocols are needed to react to frequent changes in network topology. In this lecture, the attention is focused mainly on the network layer of VANETs, proposing an approach to reduce the interference level during mobile transmission and routing protocols are presented to reduce the delay end to end and to increase packet delivery ratio (PDR) and throughput in VANETs.

Invited Speaker: Miroslav Uhrina, University of Zilina, Slovakia
Delivering lecture on: Correlation between objective and subjective methods used for video quality evaluation
Abstract: The video quality evaluation can be divided into objective and subjective assessment. The subjective assessment consists of the use of human observers who score the video quality. It is the most reliable way how to determine the video quality and can be regarded as the best one but it is time consuming method and human resources are needed. Because of this fact in many cases objective methods are mostly used. They consist of the use of computational methods called “metrics” which produce values that score the video quality. They measure the physical characteristics of a video signal such as the signal amplitude, timing, signal to noise ratio. They are repeatable.

Invited Speaker: Zdenek Becvar, Czech Technical University in Prague, Czech Rep.
Delivering lecture on: Evolution towards 5G mobile networks: Overview and key enablers"
Abstract: The lecture gives overview on expected evolution of mobile networks beyond 4G. Furthermore, selected major extensions and key technologies enabling to meet expected requirements on future mobile networks will be introduced.

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= Agenda of WORKSHOP, April 15, 2015 =
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1st DAY, April 15, 2015

9:00-9:30 - registration and workshop opening

9:30 - 10:00
LIPTEL meeting (compulsory for members of LIPTEL team), discussion on new oportunities and projects

10:00-10:30
Miroslav Vozňák
Security Issues of GSM technology

cofee break

10:30-11:00
Martin Mikulec
Work experience from internship at Edvina AB, Stockholm 2014

11:00-11:30
Jan Vitásek
Fellowship Expierence from TU Graz

LUNCH

12:30-13:30
Homer Toral-Cruz
Invited Lecture on: QoS Parameters Modeling of Self-similar VoIP Traffic

13:30-14:00
Filip Řezáč
Network Security – Hacking v praxi

cofee break

14:30-15:30
Miroslav Uhrina
Invited Lecture on: Correlation between objective and subjective methods used for video quality evaluation

15:30-16:00
Discussion

18:30 -
Dinner

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= Agenda of WORKSHOP, April 16, 2015 =
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2nd DAY, April 16, 2015

9:00-10:00
Miralem Mehic
Approaches to Routing in QKD networks

cofee break

10:30-11:30
Peppino Fazio
Invited Lecture on: Networking in vehicular networks: Overview on VANETs and routing optimization

LUNCH

12:30-13:00
Jakub Šafařík
Certified Ethical Hacking

13:00-14:00
Zdeněk Bečvář
Invited Lecture on: Evolution towards 5G mobile networks: Overview and key enablers

cofee break

14:30-15:00
Pavol Partila, Jaromír Továrek, Martin Mikulec
Expierence from training in UNICAL

15:30-16:30
Discussion and Wrap up

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= Thank you for coming =
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