Dynamic Content Placement for Mobile Content Distribution Networks

Abstract

Abstract. As wireless networks increase in popularity, the development of efficient content distribution techniques to meet the growing and constantly changing client demand becomes a necessity. Previous content distribution network proposals, targeting mainly wired networks, are not adequate to handle the high temporal and spatial variability in client demand caused by user mobility. This paper proposes and analyzes a wireless dynamic content distribution network framework that replicates content in response to changes in client demand in order to reduce the total traffic over the network backbone. We propose a mathematical programming model to determine the offline optimal solution as well as an online algorithm based on demand forecasting. Using a previously developed mobility simulator, we show our new online algorithm outperforms the traditional centralized and distributed static placement approaches, reducing the total traffic over the network backbone in up to 78%, compared to the best previous approach analyzed.

On the modelling of CDNaaS deployment

“…There have been many works [24,27] which states that, video flows follow Poisson process. Internal traffic carried can be described as Eq.…”

“…Contrary to a common misconception, CDNs are not only big hybrid database-network like entities that hold the video data and unicast to subscribers like a traditional single server service. In fact, CDNs provide highly sophisticated caching mechanisms [27] to carry out edge computing functionality and allocate copies of the content over their geographically distributed edge nodes [18]. Whenever there is a demand for the service of any content, edge cache nodes are activated through a process called "warming" [15] where copies of the content are cached from origin to intermediate and eventually towards the edge nodes.…”

A Cooperative Hybrid Caching Strategy for P2P Mobile Network

“…W.M. Aio et al [5] propose a wireless dynamic content distribution network framework and X. Fu et al [6] address the QoS-aware replica placement problem in a tree based mobile grid environments. J. Dai et al [7] propose a collaborative caching mechanism that aims at maximizing the social welfare in the context of Vickrey-Clarke-Groves auctions.…”

An Efficient Content Distribution Network Architecture Using Heterogeneous Channels

“…Only when the scheduling was completed could users access hot resources smoothly. In [4], Aioffi et al proposed a statistical prediction-based double exponential smoothing heuristic dynamic content replacement online algorithm to optimize CDN resource scheduling. The algorithm predicted user requests to optimize cache updates.…”