Abstract
This article proposes a novel chunk-based caching scheme known as the Progressive Popularity-Aware Caching Scheme (PPCS) to improve content availability and eliminate the cache redundancy issue of Information-Centric Networking (ICN). Particularly, the proposal considers both entire-object caching and partial-progressive caching for popular and non-popular content objects, respectively. In the case that the content is not popular enough, PPCS first caches initial chunks of the content at the edge node and then progressively continues caching subsequent chunks at upstream Content Nodes (CNs) along the delivery path over time, according to the content popularity and each CN position. Therefore, PPCS efficiently avoids wasting cache space for storing on-path content duplicates and improves cache diversity by allowing no more than one replica of a specified content to be cached. To enable a complete ICN caching solution for communication networks, we also propose an autonomous replacement policy to optimize the cache utilization by maximizing the utility of each CN from caching content items. By simulation, we show that PPCS, utilizing edge-computing for the joint optimization of caching decision and replacement policies, considerably outperforms relevant existing ICN caching strategies in terms of latency (number of hops), cache redundancy, and content availability (hit rate), especially when the CN’s cache size is small.
Highlights
Information-Centric Networking (ICN) has been proposed by V
Devices, it is more efficient to cache the foremost chunks of unpopular content first at edge than sensors to collect, transmit, and process data to realize a smart-sensing design in the same way as we did in our recent study on smart Internet of Things (IoT) sensor-enabled ICN system [32]
Even though we propose Popularity-Aware Caching Scheme (PPCS) in hierarchical networks, the proposal is definitely applicable to general ICN interconnections/topologies in which nodes at the initial levels refer to Content Routers (CRs) closer to the user along the delivery path
Summary
Information-Centric Networking (ICN) has been proposed by V. It is necessary to address this theme and minimize the redundancy level in ICN for a large-scale and practical ICN deployment Motivated by these facts, the presented paper proposes a novel cache management scheme, namely Progressive Popularity-Aware Caching Scheme (PPCS), including both content placement and replacement policies to minimize cache redundancy, reduce network traffic, and provide efficient content delivery to users. This article contributes to the new concept of cache redundancy avoidance and efficient content dissemination in ICN with innovative ideas of popularity-aware caching policies as well as the utility-based replacement strategy This concept is leveraged by an edge-based implementation utilizing key features of ICN to minimize cache redundancy and the server hit rate at the same time. This proposal acts as a practical and potential approach, which matches the design goals of future networks [7] and achieves the target of the “Connect 2020” program [8] toward establishing global-scale and widely-applicable ubiquitous networks
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
