I. Introduction
With the promotion and universality of cellular networks (e.g., Universal Mobile Telecommunications System (UMTS) and Long Term Evolution (LTE)) the issues of mobile data usage prediction are more and more important for the strategies of mobile network deployment and mobile data plan recommendation. The investigation indicated that the output of industrial production of global communication devices has been increased by 0.46 million US dollars, and the annual growth rate of mobile communication industries in Taiwan is measured as 3.7% [1]. Therefore, the volumes of mobile data usages will be generated and produced, and the techniques of mobile data usage prediction are required for mobile users and telecom companies.