Effective new cache decision policy for breadcrumbs in content-centric networking

Information-Centric Networking (ICN) has been proposed for efficient content distribution. ICN routers are generally equipped with cache storages and store incoming data packets temporally. In order to leverage as much total cache storages in a network as possible, the combination of routing policy and cache policy installed on the routers is dominant factor for performance. For routing policy, an efficient off-path forwarding method with in-network guidance, Breadcrumbs, has been proposed. In this paper, we propose a cache decision policy based on betweenness centrality and content popularity, which is suitable for Breadcrumbs. Our proposed cache decision policy makes popular contents located edge area of a network, which stabilizes popular cached contents. Moderate popular contents tend to be stored in core area, which induces in-network guided requests to encounter cached contents more frequently. Our performance evaluation results reveal that the combination of Breadcrumbs and our proposed cache decision policy improves cache hit performance compared to existing cache decision policies.