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Quality of Experience (QoE) for mobile Web browsing is a complex and multidimensional concept. So far, the research community has addressed the influence of QoE perceptual dimensions on QoE and the impact of various influence factors on QoE perceptual dimensions for mobile Web browsing. In this study, we recognize the gap and need to analyze and gain a deeper understanding of the relationship between multiple influence factors and specific constructs of QoE perceptual dimensions. Utilizing a previously collected dataset, our goal is to fill the research gap in terms of investigating the impact of specific influence factors (loading time, aesthetics, number of taps, information quality) on various constructs comprising the user perception of usability, aesthetics, and information quality in the context of mobile Web browsing. A total of 14 research questions are raised: 7 addressing constructs comprising perceived usability (simplicity, effectiveness, quickness, efficiency, comfort, ease of use, organization), 3 addressing constructs comprising perceived aesthetics (perception of mobile Web site aesthetics, pleasance, clarity, systematicness), and 4 addressing constructs comprising perceived information quality (timeliness, clarity, conciseness, structuralism/completeness/spelling-correctness). Results of posed research questions provide indications on the strength and direction of the impact of considered QoE influence factors on the perception of studied constructs. This study contributes to the research community by being the first to address the impact of chosen QoE influence factors on individual constructs comprising QoE perceptual dimensions in the domain of mobile Web browsing, thus extending the knowledge on interplays and relations in this area. Furthermore, it contributes by revealing numerous new paradigms in the context of usability, aesthetics, and quality of information, such as: (i) beautiful and easy to reach is more simple, effective, efficient, and comfortable, (ii) easy to reach is more pleasant and clear, (iii) informative is more pleasant and clear, (iv) beautifully presented information has higher perceived quality, etc. Reported findings can be utilized by various stakeholders (mobile Web site designers, content providers, device designers, network providers) for indirect management of QoE. [ABSTRACT FROM AUTHOR]

In this paper, we investigate methodologies for modeling quality of experience (QoE) for networked video games, focusing on massively multiplayer online role-playing games (MMORPGs), and using Blizzard Entertainment's World of Warcraft (WoW) as a case study. In two user studies, involving a total of 104 players, we investigate system, user, and context parameters and evaluate their impact on QoE and related quality features. We also discuss some methodological questions related to measuring gaming QoE, which can be used as guidelines for future gaming QoE studies. We further analyze a set of quality metrics "beyond MOS". Having evaluated different modeling techniques, we present and evaluate four linear statistical models and three (non-linear) machine learning models for estimating MMORPG QoE. Finally, we make our datasets available to the research community to foster further analysis and reproducibility of results. [ABSTRACT FROM AUTHOR]

Browsing different types of Web sites on mobile devices has become a part of many people's everyday activities. In the context of Quality of Experience (QoE) research, there is an interest in understanding the impact of various web site design and performance factors, i.e., QoE influence factors (IFs) on different perceivable characteristics of a user’s experience which contribute to its quality, i.e., QoE features . In this paper, we refer to our recently published multidimensional QoE modelling study (Baraković and Skorin-Kapov, 2015), whereby 77 participants took part in a field study and rated sixteen different versions of an information portal and a thematic portal, and eight versions of an e-mail portal by using a smartphone or a tablet. We extend the previously reported data analysis with new findings explicitly exposing the relationships between QoE IFs and QoE features . In this paper, we quantify mutual relations between identified QoE IFs ( Web site loading time, Web site aesthetics, number of taps to reach desired Web content, quality of Web site information ) and selected QoE features ( perceived Web site loading time, perceived Web site usability, perceived Web site aesthetics, perceived quality of Web site information ). Results of the analysis show the existence of : (i) negative impact of number of taps to reach the desired Web content on perceived Web site loading time; (ii) negative impact of Web site loading time (in case of smartphones), and positive impacts of Web site aesthetics and quality of Web site information (in case of thematic portal) on perceived Web site usability; (iii) negative impact of number of taps to reach the desired Web content and positive impact of quality of Web site information (in case of thematic portal) on perceived Web site aesthetics; and (iv) positive impact of Web site aesthetics on perceived quality of Web site information. Moreover, obtained multiple linear regression models, which describe the mutual relations between considered QoE IFs and QoE features, extend previously reported multidimensional mobile Web QoE models and thereby enable the identification of the importance of distinct factors in terms of perceived QoE features. [ABSTRACT FROM AUTHOR]

The increasing use of mobile devices for Web browsing has driven a rising interest amongst actors involved in the service provisioning chain in understanding the factors influencing user experience. Research activities stemming from both the fields of human–computer interaction (focusing on user experience, UX) and networking and telecommunications (focusing on Quality of Experience, QoE) have addressed different factors, both aiming for a similar goal – understanding and enhancing the user experience when accessing mobile Web sites. We draw these diverged studies under a common umbrella with the aim of studying multiple factors that impact QoE while browsing the mobile Web, focusing on design, information quality, and loading time. We present a multidimensional analysis of the quality of user experience in the context of browsing information, thematic, and e-mail portals on smartphones and tablet devices. Experiments were conducted in field settings with 77 participants during a two-month period. Based on factor manipulations, participants rated sixteen versions of an information portal and a thematic portal, and eight versions of an e-mail portal by using a smartphone or a tablet. For the purpose of data analysis and hypotheses testing, analysis of variance, Pearson correlation analysis, and multiple regression analysis have been reported. Results show the existence of significant effects of examined factors on QoE. Mutual relations between QoE and multiple perceivable characteristics of the experience that contribute to its quality, referred to as QoE features, are found to be highly and positively correlated, and are further quantified using multiple linear regression models. [ABSTRACT FROM AUTHOR]

E-Health services comprise a broad range of healthcare services delivered by using information and communication technology. In order to support existing as well as emerging e-Health services over converged next generation network (NGN) architectures, there is a need for network QoS control mechanisms that meet the often stringent requirements of such services. In this paper, we evaluate the QoS support for e-Health services in the context of the Evolved Packet System (EPS), specified by the Third Generation Partnership Project (3GPP) as a multi-access all-IP NGN.We classify heterogeneous e-Health services based on context and network QoS requirements and propose a mapping to existing 3GPP QoS Class Identifiers (QCIs) that serve as a basis for the class-based QoS concept of the EPS. The proposed mapping aims to provide network operators with guidelines for meeting heterogeneous e-Health service requirements. As an example, we present the QoS requirements for a prototype e-Health service supporting tele-consultation between a patient and a doctor and illustrate the use of the proposed mapping to QCIs in standardized QoS control procedures. [ABSTRACT FROM AUTHOR]

The IP multimedia subsystem (IMS) has been recognized as a reference next-generation network architecture for offering multimedia services over an Internet Protocol (IP)-based infrastructure. One of the key benefits of the IMS is efficient and flexible introduction of new services and access to third-party application providers, thanks to standard interfaces and standardized service capabilities. To support novel media-rich applications across a wide range of user devices and access networks, IMS must support negotiable quality of service (QoS) for lP multimedia sessions. In this article, we describe the application-level QoS signaling as specified by the 3GPP and propose some enhancements based on advanced QoS parameter matching and optimization functionality to be included along the signaling path. We outline various signaling flow scenarios and discuss them in the context of a case study involving an IMS- supported 3D virtual environment, featuring a treasure-hunt-like game. [ABSTRACT FROM AUTHOR]

Virtual reality services may be considered a good representative of advanced services in the new-generation network. The focus of this article is to address quality of service support for VR services in the context of the UMTS QoS framework specified by the 3G standardization forum, the Third Generation Partnership Project. We propose a classification of VR services based on delivery requirements (real-time or non-real-time) and degree of interactivity that maps to existing UMTS QoS classes and service attributes. The mapping is based on matching VR service requirements to performance parameters and target values defined for UMTS applications. Test cases involving heterogeneous VR applications are defined, using as a reference a general model for VR service design and delivery. Measurements of network parameters serve to determine the end-to-end QoS requirements of the considered applications, which are in turn mapped to proposed VR service classes. [ABSTRACT FROM AUTHOR]

The aim of this research was to determine if the speed of movement in virtual environments has an impact on cybersickness as potentially experienced by an end user of the system. Cybersickness is a common side effect in virtual reality (VR) systems, shown to have a negative influence on user experience. It can be described as a mismatch between vestibular and oculomotor sensors, where a person has a feeling of movement even though there is none. In this research, we study the impact of different navigation speeds in VR on cybersickness, relying on both subjective ratings indicating cybersickness symptoms, and objective measures of stress level. We wanted to find out if there is a correlation between objective and subjective metrics used. For test purposes, we used the HTC Vive VR headset and scenery from the Talos Principle VR game (where subjects can easily shift between three different movement speeds). Subjective ratings were collected using a questionnaire involving 11 questions used to evaluate cybersickness symptoms. Objective metrics were collected using the Pip Biosensor. A total of 28 participants took part in the study, while 2 participants withdrew due to physical discomfort. Results obtained from the Pip device show no statistically significant difference between navigation speeds for relaxed, stressed, and steady states. Some statistically significant correlations were found between gender and stomach ache, need to vomit, and physical discomfort while wearing HMD. Furthermore, correlation was found between age and variables of nausea in transport vehicles and vertigo. Other correlations found are described in the results section of the paper. [ABSTRACT FROM AUTHOR]