Edge-Feedback ICN Cooperative Caching Strategy Based on Relative Popularity

摘要

Information-centric networking (ICN) improve content-oriented services by enabling in-network caching and providing the best request forwarding path. The On-path cooperative caching in in-network caching is an effective way to reduce the service delay. It provides higher performance by coordinating between nodes on the request forwarding path. However, the current strategy is to push popular content to the edge of the network, resulting in a large amount of cache redundancy at the edge of the network. This will reduce the cache utilization of the network, and cause additional communication overhead between nodes on the forwarding path. This paper proposes an edge-feedback cooperative caching strategy, which advances the caching decision to the request forwarding phase, from the edge of the network to the core network. The node on the forwarding path recalculates the relative popularity of the content based on the feedback of the downstream node, and determines the content items that need to be cached in the network according to the calculation result.