Hierarchical cooperative-peers fog caching strategy to improve the performance of content centric networking

Abstract

Content Centric Networking (CCN) is a novel paradigm to address challenges faced by traditional TCP/IP architecture. The motivation behind CCN is its inherent feature of caching. Caching at intermediate nodes is essential to reduce delay and to enhance performance of the network. However, determining as to how and where content should be cached to achieve this is the major challenge in CCN architecture. In this paper, we have proposed a Hierarchical Cooperative-peers Architecture (HCPA) and effective caching approaches to reduce the response time and increase the cache hit rate alleviating the server bottleneck and network traffic. The main idea is to utilize the resources of fog peer nodes near the user to deal with high latency and low bandwidth issues of the current communication pattern. This is achieved by pooling the cache space of cooperative fog peers of a region with a Regional demand-based fog Caching (RDFC) approach in two folds. First implementation is with replicated caching (RC) and the second one is using unique caching (UC). Both these approaches are implemented using CcnSim and the performance is evaluated based on cache hit rate, response time and bandwidth usage which has shown the significant improvement in the performance of the network.