Cache Content Optimization for Wireless Networks

The past decade has witnessed a rapid growth in the mobile network data traffic, driven by the tremendous increase in the variety of mobile devices and data-rich applications, such as live video streaming and online gaming. It has been observed that a significant portion of the mobile data traffic is caused by a relatively small number of highly popular content, such as viral video files, news videos, etc.,downloaded by millions of users. In today's systems, each time such a request is received, the network fetches the content from the central server, and delivers it to the user through the access point (i.e.,base station,WiFi router) it is connected from. A smarter solution is to "cache" some of the most popular files at the base stations or WiFi access points, and serve the users directly from these nodes on the network edge. This will reduce not only the traffic in the core network, but also the latency for users.