On the other hand, the contradiction between dynamic user traffic and fixed data plans has also drawn increasing attention in the field of mobile applications. Today, with the increasing demand of data download through cellular connections, downstream rate offered by current cellular networks is insufficient to meet users’ demand. As shown in Fig. 1, people often fail to get high quality of Internet service because of the low downstream rate. On the other hand, the contradiction between dynamic user traffic and fixed data plans has also drawn increasing attention in the field of mobile applications.