Congestion control in named data networking

摘要

The ICN (Information-centric networking) is a new network architecture that uses named information rather than IP address for content retrieval and delivery. Owing to the built-in multicast and in-network caching capabilities, ICN is expected to achieve efficient content delivery. Actually, however because the cache capacity of the router is limited, there is a possibility that ICN performance may not be as good as expected. This paper, taking NDN (Named Data Networking) as a study target, analyses the overload characteristics of NDN network and clarify performance deterioration mechanism caused by excessive content requests. Based on these results, it proposes the content caching control as well as the request forwarding control that adapt to the network state. By these controls, link congestion is mitigated and content acquisition time is significantly improved. It also reveals that the control effect varies considerably depending on the topological relationship between the location of the publisher and users.