Designing content placement for aggregating ICN FIBs and reducing network traffic

In recent years, Information-centric networking (ICN) has attracted wide attention as a new network architecture which can efficiently deliver digital content and Internet of Things (IoT) data. In ICN, we can request data by content name and send request packets by referring to FIB (forwarding information base) of routers. However, unlike IP communication, the ICN router's FIB does not depend on location, so prefix aggregation is difficult. On the other hand, CDN (content delivery network) is widely used as a technology to improve the delivery quality of users and reduce the amount of traffic in networks. Using CDN, it can replace the location of distribution of original content provided by the publisher. In this paper, we propose to use the CDN as a method of allocating originals of content and replace them to reduce the FIB size when using the LPM (longest prefix matching) to aggregate FIBs. When replacing originals of contents, we also consider reducing the network load as well as reducing the FIB size. Through numerical evaluation using multiple types of topologies, we clarify the influence of evaluation weights of topologies on the FIB size and the network load.