Effective Caching Schemes for Minimizing Inter-ISP Traffic in Named Data Networking

Internet has evolved to be content-oriented and its key usage focuses on content dissemination and retrieval, while Internet architecture is designed for host-oriented services. To address the challenge, Named Data Networking (NDN) has been proposed, where in-network caching becomes a new research topic due to its dominant position in NDN architecture. This work develops efficient caching schemes for Internet Service Providers (ISPs) so as to maximize the inter-ISP traffic savings. With the special goal, we design caching system according to the NDN network model and present coordinated caching algorithms which can dynamically determine cache placement along the forwarding path. Comprehensive simulation results show that our schemes outperform the widely used Leaving Copies Everywhere (LCE) both in inter-ISP traffic savings and the average number of access hops by up to 20%. In addition, we demonstrate good feasibility of the proposed caching algorithms in a set of simulations spanning a wide range of parameter values.