• A new QoE fairness index for QoE management 

      Hossfelt, Tobias; Skorin-Kapov, Lea; Heegaard, Poul Einar; Varela, Martin (Journal article; Peer reviewed, 2018)
      The user-centric management of networks and services focuses on the Quality of Experience (QoE) as perceived by the end user. In general, the goal is to maximize (or at least ensure an acceptable) QoE, while ensuring ...
    • Definition of QoE Fairness in Shared Systems 

      Hossfelt, Tobias; Skorin-Kapov, Lea; Heegaard, Poul Einar; Varela, Martin (Journal article; Peer reviewed, 2016)
      User-centric service and application management focuses on the Quality of Experience (QoE) as perceived by the end user. Thereby, the goal is to maximize QoE while ensuring fairness among users, e.g., for resource allocation ...
    • Fundamental Relationships for Deriving QoE in Systems 

      Hossfeld, Tobias; Heegaard, Poul Einar; Skorin-Kapov, Lea; Varela, Martin (Chapter, 2019)
      In the context of subjective user studies conducted to derive relationships between influence factors and QoE, user diversity leads to distributions of user scores for test conditions. Such models are commonly exploited ...
    • No Silver Bullet: QoE Metrics, QoE Fairness, and User Diversity in the Context of QoE Management 

      Hossfelt, Tobias; Skorin-Kapov, Lea; Heegaard, Poul Einar; Varela, Martin (Chapter, 2017)
      Managing QoE is one of the most interesting direct applications of workable QoE models. Indeed, being able to predict how users perceive the quality of a service allows the service provider(s) to optimize its delivery, ...
    • On Additive and Multiplicative QoS-QoE Models for Multiple QoS Parameters 

      Hossfelt, Tobias; Skorin-Kapov, Lea; Heegaard, Poul Einar; Varela, Martin; Chen, Kuan-ta (Chapter; Conference object, 2016)
      Generic relationships between QoE and QoS have been inten- sively discussed in literature for single QoS parameters and often found to be logarithmic or exponential. While there are many experimental studies investigating ...
    • QoE - Defining a User-Centric Concept for Service Quality 

      Varela, Martin; Skorin-Kapov, Lea; De Moor, Katrien; Reichl, Peter (Chapter, 2016)
    • QoE Analysis of the Setup of Different Internet Services for FIFO Server Systems 

      Hoßfeld, Tobias; Varela, Martin; Heegaard, Poul Einar; Skorin-Kapov, Lea (Journal article; Peer reviewed, 2018)
      Queueing systems following a first-in-first-out (FIFO) strategy are well understood and various results are known for the response time of the system. However, the question arises how the results look like when taking into ...
    • QoE Beyond the MOS: An In-Depth Look at QoE via Better Metrics and their Relation to MOS 

      Hossfelt, Tobias; Heegaard, Poul Einar; Varela, Martin; Möller, Sebastian (Journal article; Peer reviewed, 2016)
      While Quality of Experience (QoE) has advanced very significantly as a field in recent years, the methods used for analyzing it have not always kept pace. When QoE is studied, measured or estimated, practically all the ...
    • The Interplay between QoE, User Behavior and System Blocking in QoE Management 

      Hossfeld, Tobias; Atzori, Luigi; Heegaard, Poul Einar; Skorin-Kapov, Lea; Varela, Martin (Chapter, 2019)
      In this position paper we highlight a shortcoming of current QoE management approaches that typically do not take into due account the resulting user behavior. As a result, a divergence is introduced between the predicted ...