Incentive cooperative caching for localized information-centric networks

Abstract

In-network caching has the potential to improve network efficiency and content distribution performance by satisfying user requests with cached content in Information-Centric Networking (ICN). Due to the fact that users in the same network domain can easily share their cached content with each other via home network devices, to reduce the transmission cost for obtaining content from the core network, caching cooperation home networks are constructed. Derived from the analysis of the economic relations among ICN entities, we propose an efficient incentive cooperative caching mechanism for content retrieval in localized ICNs in this paper. Particularly, access networks give rebates to those users who provide locally cached content for content retrieval in cache cooperation. To minimize the cost (including rebate and transmission cost) of obtaining a piece of content in the proposed caching framework, we also formulate an optimal caching problem as a multiple-choice knapsack problem. Furthermore, a sub-optimal caching scheme is proposed to handle the optimal content placement problem efficiently. Simulation results verify the superiority and efficiency of the proposed sub-optimal caching scheme compared with random caching.