Delay Efficient Caching in Fog Computing

Abstract

The emergence of fog computing in existing cloud-based infrastructure has facilitated quality of service (QoS) delivery to end users. The real-time communication is a significant concern in fog networks for delay-sensitive applications. The number of research works has been conducted in the past to improve the content retrieval delay during content delivery with major focus toward content placement. However, node placement is another critical aspect for efficient communication. The timely delivery can be achieved through content caching on network nodes while considering content parameters as well. To address the real-time application requirements, this paper proposes caching of popular contents on the nodes based on caching filtration mechanism. The caching filtration allows only fog nodes with enough computation resources to cache the content replicas. The performance evaluation of the proposed scheme exhibits significant improvement in achieving reduced content retrieval delay in comparison to existing benchmark caching strategies.