The performance of caching strategies in content centric networking

Content-centric networking (CCN) is considered to be the future Internet which moves from host-to-host model to transfer data model based on content name. Network data caching is a characteristic of CCN whose effectiveness depends on the content caching policies in the nodes. Leave copy everywhere (LCE) is the default policy in CCN which caches all content at all nodes leading to poor caching performance. Several policies have been proposed to improve the caching performance in CCN. In this paper, we evaluate the performance of caching policies in terms of caching hit ratio, time delay, and distance from consumer to caching hit content in the first node. In addition, we compare the caching policies combined with the content replacement policies when caching space at nodes is not enough room to cache new content. Our simulation model is implemented in the Abilene and Tree network models.