Collaborative in-network caching for multi-path routing

This paper proposes a collaborative in-network caching method for multi-path routing. In-network caching allows routers in networks to store contents in their caches and users can download the contents from the routers in addition to content servers. In such a situation, the proposed method introduces a joint optimization problem of in-network caching and multi-path routing, which is formulated as linear programming. The in-network caching problem decides location of contents and the multi-path routing problem decides multiple routing paths to download the contents. Through numerical experiments, we show that the proposed method efficiently reduces the loads of congested links.