(Offloading) QoE-Aware Application Mapping and Energy-Aware Module Placement in Fog Computing + Offloading

2. Challenges

Since QoE deals with users’ level of satisfaction for a given service or product from a service vendor, there is a challenge of developing QoE-aware policy in a real-time and heterogeneous environment (i.e. in a fog computing environment) due to the fact that the users’ interests for different services could be different from one to another and could change from time to time. Other than that, determining which applications to be mapped on which fog instances is also a challenging task as it needs to ensure that users’ QoE gain is maximized while the service QoS is observed. However, in a resource constraint and real-time environment like fog computing, it is difficult to ensure that the final objectives of the proposed policies are not obstructed where the application mapping and calculations carried out will only be performed in a short period of time with the minimum amount of computational effort.