Progressive caching in CCN

The current Internet is based on the old concept of data networking whose role was to mainly build a fault-tolerant network infrastructure that enables efficient sharing of scarce and expensive resources such as storage and CPU time. Its main feature is the end-to-end principle of communication between any pair of hosts under the client-server model, which was well suited for early Internet applications, e.g., remote login (CPU sharing) and ftp (storage). In recent years, the main usage of the Internet has evolved to become a vehicle of content generation, sharing and retrieval, demonstrated by such extremely hot applications as P2P live and on-demand streaming, User-Generated Content (UGC) services (e.g., Youtube, Flickr ) and Social Networks (e.g., Facebook, Google+). To match such transformation, a clean-slate redesign of the future Internet architecture has been proposed under the generic name of Content-Centric Networking (CCN). In this paper, we propose a new caching scheme for such CCN networks and evaluate the in-network caching performance of this policy by comparing it with that of the default proposed policy via simulation.