Framework for replica placement over cooperative edge networks

Abstract

Multimedia traffic is increasing sharply as an important component of Internet traffic to consume the bandwidth with various applications. Although most existing studies on edge networks focus on guaranteeing the quality of service for users by decreasing the latency and cost, the volume of traffic has become notably large, and the state of the network is unstable. The cloud platform and Software-Defined Network (SDN), as new technologies, undertake several functions from the edge networks such that the edge networks can concentrate on the delivery part and make optimal decisions. In this paper, we propose Cloud Co-CDNs (C3), which a prototype that transfers the management part of edge networks to the cloud with the software-defined network, and cooperation among providers of edge networks is considered in the prototype. Next, we design a stochastic model for describing the workflow in the C3 and develop a heuristic algorithm for replica placement to trade off among the latencies that are produced by the delivery process, the updating process and the replication process. Finally, we evaluate the performances of the proposed algorithms through experimental simulations. Simulation results demonstrate that the proposed algorithms are promising.