Collaborative Caching Based on Hash-Routing for Information-Centric Networking

摘要

Recently research on Information-Centric Networking (ICN overviewed in [1]) has flourished, which attempts to shift the current host-oriented Internet architecture to information-oriented. The built-in caching capability in network is a typical feature of ICN. In ICN, along the path of the request, the first cache having the desired content object responds with its cached copy, which we refer to as en-route caching mode. As the works in [2] and [3] together show, there is a large gap between the practical cache size and the caching capacity needed to cope with the vast population of content in the Internet. In [4], a cooperative in-network caching scheme is proposed, which could achieve collaboration of a cluster of caches with hash-based partitioning of content space. However, as the cluster grows, the overhead of inter-communication of caches could increase significantly. In this paper, we propose a collaborative caching scheme, named as CPHR, to maximize the overall hit ratio of an ISP network by partitioning content space and hash-routing.