System Requirements Wording

Usually I receive from my students (especially during thesis supervision) the question if there is a standard way to describe the wording of a system requirements.
An interesting approach to this is IETF RFC 2119, which defines the key words “MUST”, “MUST NOT”, “REQUIRED”, “SHALL”, “SHALL NOT”, “SHOULD”, “SHOULD NOT”, “RECOMMENDED”, “MAY”, and “OPTIONAL”

1. MUST This word, or the terms “REQUIRED” or “SHALL”, mean that the definition is an absolute requirement of the specification.

2. MUST NOT This phrase, or the phrase “SHALL NOT”, mean that the definition is an absolute prohibition of the specification.

3. SHOULD This word, or the adjective “RECOMMENDED”, mean that there may exist valid reasons in particular circumstances to ignore a particular item, but the full implications must be understood and carefully weighed before choosing a different course.

4. SHOULD NOT This phrase, or the phrase “NOT RECOMMENDED” mean that there may exist valid reasons in particular circumstances when the particular behavior is acceptable or even useful, but the full implications should be understood and the case carefully weighed before implementing any behavior described with this label.

5. MAY This word, or the adjective “OPTIONAL”, mean that an item is truly optional. One vendor may choose to include the item because a particular marketplace requires it or because the vendor feels that it enhances the product while another vendor may omit the same item.

For more info please refer to the RFC here

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Posted by on December 28, 2013 in Article


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Current developments in video quality: From the emerging HEVC standard to temporal video quality assessment and classification

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Posted by on October 4, 2013 in Presentation


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The Fourth International Workshop on,Perceptual Quality of Systems (PQS 2013)

PQS 2013

The Fourth International Workshop on
Perceptual Quality of Systems

Place: Kardinal König Haus, Vienna, Austria Date: September 2-4th 2013

This 2 and a half day workshop aims to bring together researchers from various fields and communities that are all related to perceptual quality. It will serve as a forum facilitating an interdisciplinary exchange of ideas between both academic and industrial researchers working on different aspects of perceptual quality of systems.

Contributions should address methodological aspects of quality and usability assessment and evaluation, the underlying perception and judgment processes involved, or the user perceived quality of particular technologies, systems or services. Suggested topics are:

· Methodologies and Methods of Quality Assessment and Evaluation · Metrology: Test Design and Scaling· Quality of Speech, Audio and Music

· Quality of Images and Video

· Quality of Haptics

· Quality of Multimodal and Multi-sensory Perception · Perceptual Quality vs. Quality of Experience vs. User Experience vs. Usability· Semio-Acoustics and -Perception

· Quality Engineering Processes

· Quality and Usability of Interactive Multimedia Services

Tentative Submission Deadline: 31.3.2013

For more information, please refer to the workshop website

Organizing Committee:

Raimund Schatz, Sebastian Egger, Sebastian Möller,

Alexander Raake, Ercan Altinsoy, Tobias Hossfeld


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Posted by on October 2, 2012 in Workshop


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Improving QoS and QoE for Mobile Communications – Journal of Computer Networks and Communications (JCNC)

Improving QoS and QoE for Mobile Communications – Journal of Computer Networks and Communications (JCNC)

Background and Scope:
The number of mobile Internet users and the volume of traffic generated by them keep increasing every year. In this context, the proliferation of smartphones, tablets, and cheap mobile data tariffs along with the emergence of new media services and the increasing use of 3G and upcoming 4G cellular networks as a substitute for traditional fixed-line connectivity, creates a host of new challenges when it comes to achieving good network performance and a satisfactory user experience. Beyond traditional multimedia applications such as IPTV and video conferencing which have a fairly very well-known set of performance requirements from the network perspective, the increasing uptake of web- and cloud-based services also introduces a new set of requirements for network performance. Furthermore, the evolution of mobile networks towards an all-IP paradigm (e.g. LTE) introduces new challenges for traditionally circuit-switched services such as voice telephony, where it is critical for operators to guarantee minimum levels of performance and improve them where possible.

For these reasons, operators need to understand, measure, and manage both quality and performance of the 3G and 4G services they offer. This has to be fulfilled on the technical quality of service (QoS) as well as on the quality of experience (QoE) level, since ultimately it is the human end-user who decides whether the quality of a given service is inacceptable, sufficient, or even exceeding expectations.

Topics of Interest:
This special issue aims at bringing together the state-of-the-art research on evaluating and improving QoS and QoE in wireless 3GPP networks. We encourage authors to submit recent unpublished work focused on the following topics. Potential topics include, but are not limited to:
. New mobile applications with special requirements in terms of network performance . Methods for objective and subjective QoS and QoE assessment . QoE evaluation methodologies for novel emerging mobile services . Subjective QoE testing of mobile services in the lab and in the field . Measurement, simulation, and evaluation techniques, tools, and testbeds . Combining user-, application-, and network-level measurements on different platforms . Modeling and mapping relationships between QoS and QoE . QoS and QoE monitoring in 3G and 4G networks . QoS- and QoE-driven resource control and service optimization in 4G networks, in particular regarding cross-layer approaches, extensions of current standards, and multitechnology connectivity . Trade-offs in contrast to QoS or QoE requirements (e.g., energy-efficient mechanisms coping with limited battery capacity, security, and reliability issues)

Before submission authors should carefully read over the journal’s Author Guidelines, which are located at Prospective authors should submit an electronic copy of their complete manuscript through the journal Manuscript Tracking System at according to the following timetable:
Manuscript Due Friday, 7 Sept 2012
First Round of Reviews Friday, 30 Nov 2012
Publication Date Friday, 4 Jan 2013

Lead Guest Editor:
. Pedro Merino, University of Malaga, Teatinos Campus, 29071 Malaga, Spain

Guest Editors:
. Maria G. Martini, Faculty of Computing, Information Systems and Mathematics, Kingston University, Kingston Upon Thames, UK . Raimund Schatz, Telecommunications Research Center Vienna (FTW), Vienna, Austria . Lea Skorin-Kapov, Faculty of Electrical Engineering and Computing, University of Zagreb, Unska 3, Zagreb, Croatia . Martin Varela, VTT Technical Research Centre of Finland, P.O. 1100, 90571 Oulu, Finland

Online version of this CfP:

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Posted by on August 9, 2012 in Journal


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5th International Conference on Telecommunications & Multimedia (TEMU2012)

Supported by NCSR “Demokritos”/IIT
and technically co-sponsored by IEEE/Communications Society (accepted articles to be included in IEEE Xplore library)

July 30 to August 01, 2012, Heraklion, Crete, Greece


TEMU2012 is an International conference under the technical co-sponsorship of IEEE/ComSoc, presenting new and original research results and the latest in the-state-of-the-art in Telecommunications and Multimedia. It fosters communication and discussions among researchers, scientists and students working in the design, implementation and applications of telecommunications and multimedia fields. The 2012 conference will provide a three-day Scientific Program, including presentations of invited and regular papers from researchers, manufacturers, academia and services providers. Authors are invited to submit novel, challenging and innovative results on both theoretical and practical aspects of the scope of the conference, which includes but is not limited to:

• Network & Service Infrastructures
• Beyond NGN
• Ad-Hoc and Mobile Networks
• Satellite & Space Communications
• Cognitive Radio & Dynamic Spectrum Access
• Optical Communications and Fiber Optics
• Broadcasting Future Media Internet
• Broadcasting Internet Platforms
• Cloud Computing
• Network Virtualisation
• Content aware networks & Network aware services
• IPTV, Mobile TV and P2PTV
• Service Architectures and Software Engineering
• Multimedia Authoring Tools
• Testbeds and experimentation
• Energy saving and green technologies
• Quality of Service and Quality of Experience
• Security, Privacy and Billing
• Electronic commerce and e-business

Submitted papers should not exceed 6 pages-long, following the Standard IEEE conference templates for MS Word or LaTeX formats. Papers should be submitted as PDF files through the EDAS system ( All submitted papers will be subject to three independent reviews and judged on originality, technical correctness, relevance, and quality of presentation. Accepted papers in TEMU2012 will be also published in IEEE Xplore.

Important Dates
Special sessions and workshops proposals……March 30, 2012
Submission of technical papers…………………..May 07, 2012
Notification of acceptance …………………………June 04, 2012
Submission of camera-ready papers ……………June 25, 2012

Contact Email:

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Posted by on April 3, 2012 in Conference


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QoEMCS at EuroITV 2012

In the framework of the EuroITV 2012 (July 4 2012 @Berlin, Germany) the workshop of QoE for Multimedia Sharing will take place in parallel. The workshop is supported by Qualinet Cost action and I participate also in the Technical Program Committee (TPC). I believe that it is quite interesting to be supported by the QoE-related colleagues.

Conference Objective

Multimedia applications are becoming more and more part of our everyday life. With the fast development of social networks and exchange platforms, users interact with each other through multimedia content, from different places, using different platforms. In order to make these applications available and successful, all the elements involved in the chain between multimedia content production and consumption have to work together with one goal in mind : maximising the Quality of Experience on the user’s side. This global issue requires taking into account a high variability of devices, networks, users and consumption scenarios, while addressing technological constraints related to the available resources in terms of network capacities, computation power and storage. In order to gain more knowledge on the provision and assessment of Quality of User Experience, new parameters have to be considered, such as from the psychophysical and environmental context. These efforts are further justified by the emergence of new multimedia concepts and applications, such as 3DTV, Free Viewpoint TV and Mobile TV, which include complex interactions with the users and with their environment. The QoEMCS workshop has been part of the last two editions of EuroITV. The third edition will once again focus on QoE and multimedia interactions, centered around the evaluation and optimization of interactions between users across different places and platforms.

Organising Committee
  • Yohann Pitrey, University of Vienna (AUT),
  • Shelley Buchinger, University of Vienna (AUT),
  • Rui Jorge Lopes, Instituto de Telecomunicações and ISCTE – Instituto Universitário de Lisboa (POR)
  • Satu Jumisko-Pyykkö, Tampere University of Technology (FIN)
  • Hans-Jürgen Zepernick, Blekinge Institute of Technology (SWE)
Technical Program Committee
  • Manora Caldera, Curtin University of Technology (AUS),
  • Touradj Ebrahimi, Ecole Polytechnique Fédérale de Lausanne (CH),
  • Markus Fiedler, Blekinge Institute of Technology (SWE),
  • Helmut Hlavacs, University of Vienna (AUT),
  • Harilaos Koumaras, NCSR Demokritos (GR),
  • Maulana Kusuma, Gunadarma University (ID),
  • Hendrik Knoche, Ecole Polytechnique Fédérale de Lausanne (CH),
  • Patrick Le Callet, Université de Nantes (FR),
  • Andreas Mauthe, Lancaster University (UK),
  • Maria Paula Queluz, Instituto de Telecomunicações and IST (POR),
  • Bijan Rohani, Phybit, (SG),
  • Burkhard Stiller, Universität Zürich (CH),
  • Nitin Suresh, Georgia Institute of Technology (USA),
  • Junyong You, NTNU (NO)
Important Dates
  • April 20 2012 : Paper Submission

  • May 15 2012 : Notification of Acceptance

  • June 15 2012 : Camera-ready Version

  • July 4 2012 : Workshop at EuroITV in Berlin

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Posted by on March 16, 2012 in Workshop


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Participation and Presentation in the Public consultation on the FP7 ICT Work Programme 2013 for the Networked Media sector

On 23 January 2012 the Media Unit of EC INFSO had announced a public consultation workshop for the preparation of the FP7 ICT Work Programme 2013 (Objective 1.5). In the framework of this workshop, EC published a call for ideas and recommendations, based on which selected contributors invited for a short presentation at the workshop (Brussels, Belgium).

So, I got the opportunity to present also my idea, which is relative to the development of a QoE framework especially for cloud computing environments. All the presentations of the workshop are available for downloading at this web page (PRESENTATIONS).

Similarly, the final report on the public consultation for the FP7 ICT Work Programme 2013-Networked Media Systems is now uploaded in the website:


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Posted by on February 23, 2012 in Article


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