NCR-BN Cooperative Caching for ICN Based on Off-Path Cache

In recent years, Information-Centric Networking (ICN) has attracted great interest as an architecture specifically designed for future networks. Its deployment of caches in network nodes, rather than only servers, allows popular cached content to be stored closer to users, thus effectively improving network performance. Most of the existing research on ICN cache performance has been conducted on the strategy of placing on-path caches, little considering the caches of neighbour nodes, resulting in a large number of off-path caches not being utilised. Therefore it is valuable work to investigate the cooperative caching strategies and performance of off-path caches. In this paper, we propose the Neighbor Caching Region Strategy with Backbone Node (NCR-BN), which is used to address the problem that the default routing mechanism of the ICN can only sense the on-path cache. Then, we conduct simulation experiments on the ndnSIM to analyse the caching performance of different caching strategies and compare them to verify the effectiveness of our strategy.