Development of new off-path caching algorithm for reducing both of network traffic and content acquisition time on NDN

NDN (Named Data Networking) which focusing on the content of data, has been attracting the attentions as a new network paradigm for replacing traditional Internet architecture. NDN delivers contents by using two packets: DATA and Interest. On delivering contents, CRs (Content Router) cache the relaying contents for reusing as a response for future consumers’ content request. This caching mechanism is useful for reducing both of network traffic and server loads. On the conventional NDN, the caching mechanism is, however, only utilized for CRs belonging to the content delivery path. This paper proposes a new NDN caching algorithm of delivering contents on CRs other than the contents delivery path (off-path). Novelty of this paper’s proposal is that concentrating caches of popular content on a designated CRs for avoiding over concentration by the popular content caches, and for utilizing network caching capacity to improve the diversity of cached contents. Availability of the proposed algorithm is evaluated by computer simulation.