CCAR: Caching and Content-Aware Routing for Content Oriented Networking

ICN (Information-Centric Networking) has been proposed for efficient content distribution to deal with rapid increase of the Internet traffic. This paper proposes a caching and content-aware routing method named CCAR. CCAR operates based on the ICN concept that users can obtain contents from anywhere in networks. CCAR is formulated as an optimization problem to coordinately perform content placement to caches and content download based on content-oriented traffic engineering. In this paper, after we formulate CCAR, we decompose the problem to a content placement sub-problem and a traffic engineering sub-problem. In the content placement sub-problem, contents are placed at routers by a local search algorithm. The traffic engineering sub-problem calculates routes according to the content placement. Our numerical results show that CCAR efficiently reduces the maximum link utilization and avoids congestion.