Content Migration Based Cooperative Caching for Content-centric Networks

Content-Centric network is a new network architecture which proposed to accommodate future changes in network traffic patterns, and to acquire the native support for scalable and efficient content. Content caching mechanism is one of the key research issues. It is too concentrated in selecting caching nodes of existing mechanisms, serious uneven with cache load distribution, greatly reducing the systems cache performance and utilization of network resources. This paper presents a cooperative caching mechanism based on cache migration, to ensure that the contents is in more important nodes with consideration the centrality as much as possible. At the same time, when the pressure in the cache is too large, it could select the appropriate neighbor node to metastasize cached content through the available buffer space, cache replacement rate and the stability of network connection and so on. The simulation results show that this mechanism can improve the cache hit rate and resource utilization.