Popularity-Based Content Cache Management for in-Network Caching

In-network caching is a technique that stores contents in caches of routers, and thus reduces the loads for content servers and networks. To further enhance the performance of in-network caching, this paper proposes a popularity-based content cache management method. The proposed method divides the cached contents into some groups based on their popularity and manages information on content placement of each group in a distributed manner with a distributed hash table mechanism. The proposed method enables users to download contents stored in near routers with low overheads. This paper shows that the proposed method enhances the cache utilization efficiently through simulation experiments.