I. Introduction
With the explosive growth of mobile user, people are relying more heavily on mobile device for sharing contents and watching video streaming, which leading in yields a tremendously heavy traffic demand in cellular networks [1], and resulting in great influences on the service quality of user access to the Internet [2]. Therefore, how to reduce network congestion and improve the quality of service to users and reduce the latency time to access information, network operators and content providers face a major challenge.