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

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


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: