Prospect Theoretic Pricing For QoE Modeling In Wireless Multimedia Networking

Abstract

One of the biggest challenges in wireless multimedia communications is to provide satisfactory Quality of Experience (QoE) to the users. Recently, numerous QoE maximization metrics and techniques have been proposed to jointly improve the network performance and user satisfaction. However, these methods are built upon postulates of Expected Utility Theorem (EUT). In this paper, we discuss the limitations of EUT in modeling QoE and explore the nuances in Prospect Theory (PT) such as asymmetrical s-shaped value function and reference point dependence to develop a prospect-theoretic QoE maximization framework by incorporating price in QoE model. An algorithm to determine the amount of data that users should purchase at any given cost such that their QoE is maximized, is also presented. As an exemplary scenario, we consider a simplified multimedia communication network with two users, where both users request the same multimedia content and aim to achieve the best possible QoE. Traditional EUT-based price-QoE model has been adopted for the first user, while the proposed PT-based prospect theoretic multimedia pricing QoE model has been used for the second user. Simulation studies conducted with H.265 multimedia codec data reveal that PT user achieved higher QoE in comparison to EUT user at a lower cost. Results also indicated that PT-based modeling can improve system throughput and network revenue.