2020 International Symposium on Performance Evaluation of Computer and Telecommunication Systems

July 20 - 22, 2020
Virtual Conference
SPECTS’20 is an annual conference whose goal is to provide a forum for professionals and researchers to discuss and disseminate the most promising contributions on performance evaluation of computer and telecommunication systems. Papers describing results of theoretic and/or practical significance are solicited. Experimental, modeling, analysis, and simulation studies as well as testbed deployment, field trials and experiences gained are all in the scope of the conference. Work presenting novel performance evaluation methods or providing insights on design and runtime tradeoffs are particularly encouraged.






SummerSim 2020 Best Paper
Title: A General Variable Neighborhood Search for Simulation-Based Energy-Aware Flow Shop Scheduling
Author: Bernhard Heinzl and Wolfgang Kastner
Session | Track: Session 2.1 | Applied Theory of Modeling and Simulation (AToMS) Track
Date | Time: Tuesday, July 21, 2020 | 2:00 p.m. CEST

SPECTS 2020 Best Paper
Title: Analysis of Network’s QoS in Service Chains
Authors: Khalil Mebarkia and Zotlán Zsóka
Session: Session II, Networking Technologies and Telecommunications
Date | Time: Wednesday, July 22, 2020 | 3:00 p.m. CEST


Virtual Conference Author Information

What to Expect on the Day of Your Presentation

Note: All presentations that provided consent will be recorded and uploaded with printed presentation online.

Step 1: Presenters should find their session schedule from the conference program online at https://scs.org/2020-spects-conference-2/ and connect at least 15 minutes before their scheduled presentation time slot using the link provided in the email that will be sent to you as a registered attendee.

Step 2: Using the presentation link mentioned above, the presenter should ideally be present during the entire session and must provide their full name on Zoom to make sure that the session chair can easily spot them. If there is a different name or nickname, a participant can rename his/her name after connecting.

Step 3: Presenters should be visible to all people attending the session, so testing your camera and audio before the day of the event is advised.

Step 4: Once it is the presenter’s allocated time slot, the session chair will call the presenter’s name and give the green light to start. Then, the presenter should share their screen using the green button located in the lower middle on Zoom. As a presenter, you have the option to share the entire screen or just the presentation application (e.g., PowerPoint).

Step 5: If this is a regular paper presentation, the presenter will have a 30-minute time slot. The presenter should spend the first 20 minutes for their live presentation without questions, and the last 10 minutes will be devoted to Q/A moderated by session chairs.  (Please keep track of your time and practice your presentation before hand to keep within the time limit).  All presentation times are provided on the SCS website within the program.

Step 6: When the 30-minute time slot ends, the presenter will need to stop sharing their screen, the session chair will end the screen share at the designated time if the presentation is running over.

Step 7: If presenter would like to further discuss their paper or other papers, there are slack rooms available. They are listed on the website and within the email you received of the Zoom link.

How to Give Great Virtual Presentation

Suggestions for presenting on the video platform Zoom, to driving engagement with questions, and tips for powerful virtual presentations. Please visit https://www.zoom.us/resources for videos and prior to the meeting go to https://zoom.us/download#client_4meeting to allow you to join a meeting without downloading any software. How to videos for zoom are also located here https://support.zoom.us/hc/en-us/articles/206618765-Zoom-Video-Tutorials

1. Practice Your Virtual Presentation (Twice)
Do not let the first time you use your presentation technology (audio tools, webinar software, etc.) be in front of your audience. Grab a friend, family member, or coworker to do a dry run.
Record yourself presenting in Zoom from start to finish (no stopping to fix something). Watch the recording later and make improvements. Do it again.

2. Consider Using a Virtual Background
Spotty Wi-Fi with an unprofessional background and a poorly lit face can damage your presentation.
Check what is visible in your camera background before you start.
Make use of virtual backgrounds.  What you think of as an innocuous background can be extremely distracting to your audience.  Zoom’s virtual backgrounds can be used.
Pay attention to your lighting (and do not forget how this changes throughout the day!) Too much light from behind leaves you featureless, so be sure to have good even lighting from the front.  Check that you are lit from the front, not from behind

3. Minimize Distractions… And Unnecessary Tabs
Turn off your notifications. All of them. MacOS has a Do Not Disturb mode that is useful.
Pets can be a big distraction, and you may want to isolate yourself from them.
Only share the minimum necessary applications, close any tabs that you do not need for the presentation. If you have to share your whole desktop, remove anything that lives there and set a neutral background.
Check that you are looking straight at the camera and your video feed is framing the upper part of your torso and your head.  Look directly into the camera and not down at your notes or screen.
Prepare some drinking water and set a timer.

4. Share Your Screen
Make sure you know how your computer full screen works before your presentation.
If you haven’t shared your screen on Zoom before, make at least one practice share because Zoom will require certain permissions to be given. In this way, you will not waste time during your actual presentation.
Check your bandwidth if you have any reason to suspect it is low.
Keep slides simple and clean.
Provide a good introduction and conclusion.

5. Test Your Audio, and Test it Again
Adding a microphone is better than your computers audio, suggestions are, Blue Yeti or Antlion Wireless ModMic.
“Check your sound. Zoom has a test function for this.
Always have a Plan B for audio. Your phone, headset, internal microphone are all good options.
Zoom has new features to cancel background noises from your microphone. If you do not see it, you may need to update the Zoom app.

6. Use Large Font Size
Present off the lowest resolution display you have.
Always assume that you need to make your text bigger. If you are sharing code or your command line, check your text color, background color, and font size. If you are not sure, ask a friend to check. In addition, if you have an opportunity to add a little personality with your background or color.

7. Schedule Time for Virtual Q&A
Presenting to a camera can feel lonely. If possible, build in a way for the audience to interact-chat, question & answer, and breakout rooms are all great options.

8. Look Directly at the Camera
Present as if you are talking to a person, not your camera.
Make sure you are making eye contact with the camera.  Do not have your camera at one angle and looking at another angle.
Put your speaker notes or participant video as close to your camera as possible.

9.  Backup Plan
If you know you will have spotty Wi-Fi, you can prepare a backup presentation to use.

10. Set Yourself up for Success
Audio and video quality make a big difference.

Important Dates

Tutorial Proposals: May 22, 2020 (Extended)
Paper Submission: May 22, 2020 (Extended)
Author Notification: June 15, 2020 (Extended)
Camera-Ready Paper Submission: July 6, 2020 (Extended)



Gabriel A. Wainer, Ph.D.

Presentation Title: Modeling and Simulation of Cellular Networks: Formalizing the Models

Presentation Abstract: Modeling and Simulation methods have been used to better analyze the behavior of complex physical systems and it is now common to use simulation as a part of the technological discovery process. Formal M&S appeared in order to try to improve the development task of very complex simulation systems. Some of these techniques proved to be successful in providing a sound base for the development of discrete-event simulation models, improving the ease of model definition and enhancing the application development tasks, reducing costs and favoring reuse.

This is particularly important in the development of computer networks. Future mobile networks should provide high data rate services for their customers regardless of their location. This is a challenging task, specifically for the users in the edge of the cell’s area. To overcome this problem, Long Term Evolution Advanced introduced Coordinated Multi-Point (CoMP) and other advanced techniques were introduced. In this talk, we will present different methods developed recently for the next generation of mobile networks, based on CoMP and other techniques. We discuss different M&S techniques employed, and new results obtained that show that these methods can improve the performance for end users.

We will discuss Upload User Collaboration (UUC); an algorithm can be combined with CoMP to enhance the upload performance of cell-edge users.

We will then discuss new methods to improve the performance of video traffic in cellular networks. We present different algorithms that combine Device-to-Device (D2D) communication, introduced by the Long Term Evolution-Advanced standard (LTE-A). We present two algorithms for improving the throughput of video transmission in cellular networks. The algorithms are called Cached and Segmented Video Download (CSVD), and DIStributed, Cached, and Segmented video download (DISCS).

Biography: FSCS, SMIEEE, received the M.Sc. (1993) at the University of Buenos Aires, Argentina, and the Ph.D. (1998, with highest honors) at the Université d’Aix-Marseille III, France. In July 2000 he joined the Department of Systems and Computer Engineering at Carleton University (Ottawa, ON, Canada), where he is now Full Professor and Associate Chair for Graduate Studies. He has held visiting positions at the University of Arizona; LSIS (CNRS), Université Paul Cézanne, University of Nice, INRIA Sophia-Antipolis, Université de Bordeaux (France); UCM, UPC (Spain), University of Buenos Aires, National University of Rosario (Argentina) and others. He is the author of three books and over 400 research articles; he edited four other books, and helped organizing numerous conferences, including being one of the founders of the Symposium on Theory of Modeling and Simulation, SIMUTools and SimAUD. Prof. Wainer was Vice-President Conferences and Vice-President Publications and is a member of the Board of Directors of the SCS. Prof. Wainer is the Special Issues Editor of SIMULATION, member of the Editorial Board of IEEE Computing in Science and Engineering, Wireless Networks (Elsevier), Journal of Defense Modeling and Simulation (SCS). He is the head of the Advanced Real-Time Simulation lab, located at Carleton University’s Centre for advanced Simulation and Visualization (V-Sim). He has been the recipient of various awards, including the IBM Eclipse Innovation Award, SCS Leadership Award, and various Best Paper awards. He has been awarded Carleton University’s Research Achievement Award (2005, 2014), the First Bernard P. Zeigler DEVS Modeling and Simulation Award, the SCS Outstanding Professional Award (2011), Carleton University’s Mentorship Award (2013), the SCS Distinguished Professional Award (2013), SCS Distinguished Service Award (2015), Nepean’s Canada 150th Anniversary Medal (2017), ACM Recognition of Service Award (2018), IEEE Outstanding Engineering Award (Ottawa Section – 2019), He is a Fellow of SCS.

1-2-1 (3)

Helen Karatza, Ph.D.

Presentation Title: Cloud and Fog Computing for Real-Time Applications: Resource Allocation and Scheduling Issues

Presentation Abstract: With the rapid adoption of cloud computing in science, enterprises, finance, etc. many applications have been moved from traditional computing environments to the cloud. Therefore, it is necessary to examine the various challenges involved.

For efficient cloud performance, many issues related to resource allocation, application scheduling, timeliness, cost and energy conservation need to be addressed. A particularly challenging issue in cloud computing is to run complex real-time applications which may feature high degree of parallelism. Effective scheduling algorithms should be utilized ensuring that the overall quality of service will be improved.

Due to the explosion of Internet of Things (IoT) paradigm, fog computing has emerged as a novel computing model beyond cloud computing to cope with problems related to network traffic and communication delay. However, the computational capacity of the fog resources is usually limited. Most of the IoT applications are real-time as decisions must be made very fast. Therefore, novel resource allocation algorithms and scheduling techniques are required for efficient utilization of the resources and for timeliness. Time-sensitive applications should be assigned to appropriate resources at the cloud and fog layers, based on their computational and communication characteristics.

In this talk we will describe techniques and solutions to address challenges in resource allocation and scheduling of real-time applications in cloud and fog systems and we will conclude with future trends and directions in the cloud and fog computing areas.

Biography: Helen Karatza is a Professor Emeritus in the Department of Informatics at the Aristotle University of Thessaloniki, Greece, where she teaches courses in the postgraduate and undergraduate level and carries out research. Dr. Karatza’s research interests include Fog and Cloud Computing, Energy Efficiency in Large Scale Distributed Systems, Resource Allocation and Scheduling and Real-time Distributed Systems.

Dr. Karatza has authored or co-authored about 230 technical papers and book chapters including five papers that earned best paper awards at international conferences. She is senior member of IEEE, ACM and SCS, and she served as an elected member of the Board of Directors at Large of the Society for Modeling and Simulation International. She served as Chair and Keynote Speaker in International Conferences.

Dr. Karatza is the Editor-in-Chief of the Elsevier Journal “Simulation Modeling Practice and Theory”. She was Editor-in-Chief of “Simulation Transactions of The Society for Modeling and Simulation International”, Associate Editor of “ACM Transactions on Modeling and Computer Simulation” and Senior Associate Editor of the “Journal of Systems and Software” of Elsevier. She served as Guest Editor of Special Issues in International Journals. More info about her activities/publications can be found in http://agent.csd.auth.gr/~karatza/

Submission Guidelines

For all submissions, unless noted otherwise in their guidelines, go to: https://www.softconf.com/sim/SPECTS20/

General Technical Papers

Current templates supplied by IEEE must be used. Submissions should not exceed 8 two-column, 8.5×11″ pages (including figures, tables, and references) in 10 point fonts. Please include 5-10 keywords, complete postal and e-mail address, and fax and phone numbers of the corresponding author. If you have difficulties with electronic submission, please contact Technical Program Co-Chairs or the Local Arrangement Chair.

Best Paper Awards

All accepted papers will be evaluated for a best paper award based on originality and technical contribution by an external commission.


SPECTS 2020 is soliciting proposals for tutorials (max 2 hours) to be held in conjunction with the conference. Tutorials should address established as well as new emerging research topics and practical applications in the area of performance evaluation of computer and telecommunication systems. Tutorials should present a comprehensive overview of the state of the art and outline open research and technical challenges. Proposals for tutorials should be sent to the Tutorial Chair. Tutorial abstracts along with keynote speeches’ abstracts will be included in the proceedings of the conference.

A tutorial proposal should contain the following information:

  • Tutorial title
  • Names, titles, affiliations and contact details of the presenters
  • Preferred duration
  • Extended abstract
  • Short description of the intended audience and prerequisite knowledge of the attendees (if any)
  • Short bio of the presenters

The extended abstracts of the tutorials will be included in the conference proceedings. Tutorial proposals should be submitted for review in a single PDF file — not exceeding five pages — electronically to https://www.softconf.com/sim/SPECTS20/.

Registration & Pricing



Regular and Late Registration 

  • Member: $400
  • Non-Member: $485
  • Member-Student: $200
  • Non-Member Student: $230
  • Retiree: $200

Mandatory Fee Explanation of 2020 Event FAQ
This FAQ provides details on how SCS figures out conference registration fees and the changes for a virtual event like SummerSim’20.

Student Verification Form
Retiree Verification Form

Organization Committee

Honorary Chair: Mohammad S. Obaidat, KASIT, Univ. of Jordan, Jordan
General Chair: Malamati Louta, University of Western Macedonia, Greece
Program Co-Chairs: Joaquín Entrialgo, University of Oviedo, Spain and George Karetsos, University of Thessaly, Greece
Tutorial Chair: Maria Calzarossa, University of Pavia, Italy
Publication Chair: John Vardakas, Iquadrat, Spain
Webmaster: Antonio Bueno, University of Girona, Spain

Steering Committee

Franco Davoli, Univ. of Genoa, Italy
Pascal Lorenz, Univ. of Haute Alsace, France
Mohammad S Obaidat, Fordham Univ., USA (Chair)
Jose L. Sevillano, Univ. of Seville, Spain
Helena Szczerbicka, Leibniz Univ. of Hannover, Germany
Laurence Yang, St. Francis Xavier Univ., Canada

Technical Program Committee

Efthimios Alepis, Univ. of Piraeus, Greece
Ala’a Al-Habashna, Carleton Univ., Canada
Igor Bisio, Univ. of Genoa, Italy
Christian Callegari, Univ. of Pisa, Italy
Vicente Casares-Giner, Univ. Politécnica de Valencia, Spain
Minas Dasygenis, Univ. of Western Macedonia, Greece
Franco Davoli, Univ. of Genoa, Italy
Tomaso De Cola, DLR, Germany
Joaquín Entrialgo, Univ. of Oviedo, Spain
Peppino Fazio, Univ. of Calabria, Italy
Luca Foschini, Univ. of Bologna, Italy
Daniel Garcia, Univ. Of Oviedo, Spain
Carlo Giannelli, Univ. of Ferrara, Italy
Mary Grammatikou, National Technical Univ. of Athens, Greece
Fabrizio Granelli, Univ. of Trento, Italy
Carlos Guerrero, Univ. de les Illes Balears, Spain
Helen Karatza, Aristotle Univ. of Thessaloniki, Greece
George Karetsos, TEI of Thessaly, Greece
Baha Uddin Kazi, Carleton Univ., Canada
Zbigniew Kotulski, Warsaw Univ. of Technology, Poland
Udo Krieger, Univ. of Bamberg, Germany
Sanja Lazarova-Molnar, Univ. of Southern Denmark, Denmark
Alejandro Linares-Barranco, Univ. of Seville, Spain
Pascal Lorenz, Univ. of Haute Alsace, France
Malamati Louta, Univ. of Western Macedonia, Greece
Imadeldin Mahgoub, Florida Atlantic Univ., USA
Mario Marchese, Univ. of Genoa, Italy
Alvaro Marco, Univ. of Zaragoza, Spain
Luisa Massari, Univ. of Pavia, Italy
Pierre Olivier, Univ. of Manchester, UK
Ibrahim Onyuksel, Northern Illinois Univ., USA
Yahya Osais, King Fahd Univ. of Petroleum and Minerals, Saudi Arabia
Elena Pagani, Univ. di Milano, Italy
Georgios L. Stavrinides, Aristotle Univ. of Thessaloniki, Greece
Daniele Tessera, Catholic Univ. of Sacred Heart, Italy
George Tsihrintzis, Univ. of Piraeus, Greece
Iraklis Varlamis, Univ. of Athens, Greece
Manuel Villen-Altamirano, Univ. of Malaga, Spain
Gabriel Wainer, Carleton Univ., Canada
Bernd Wolfinger, Univ. of Hamburg, Germany

Questions? Call Phone: 858-277-3888 or Email scs@scs.org