... framework of the E3 project National Participation, funded by the General Secretariat of Research and Technology (GSRT) of the Greek Ministry of Development and evolved in the context of the ... end-user experience, in terms of quality of service (QoS), availability and reliability. At the same time, the complexity and heterogeneity of the infrastructure of mobile network operators increases ... in terms of QoS, and more specifically in terms of bitrate, and on user preferences, in terms of user satisfaction for the achieved QoS, given the service, the time and the location of the user....