I. Introduction
The recent developments of smart devices and mobile applications have significantly increased the level at which human users interact with mobile systems and the penetration of mobile subscribers exceeded 97% in 2015. The popularity of smart mobile devices and social networks such as Facebook stimulates a surge of mobile data traffic. It is estimated that the monthly global mobile data traffic will reach 49 exabytes by 2021 and represent 20 percents of total IP traffic [1]. As a result, human activities, usage behavior, and user perceived experience weigh increasingly on the performance of mobile networks.