The global provisioning of some types of evolved services over the Internet requires the deployment of servers; the approach is usually called service overlays. An optimal design of the number of servers and of their location is critical in order to minimize the deployment cost while providing the quality of service expected by users. In this paper, we propose an original modelling, analysis an...

With the growth of bandwidth, video/audio streaming services have become popular, and are considered a future killer application on the Internet. Many researches proposed several possible technologies for streaming services, such as hot-video broadcasting, caching, content delivery network (CDN), and peer-to-peer communications. In the paper, we propose a new streaming architecture combining th...

Real-time multimedia will be among the most important applications in next generation networks. However, efficiently managing the delivery of these applications to guarantee Quality of Experience (QoE) to end-users facing network resources limitation and heterogeneity of networks is a challenge. This paper first explores key requirements to provide QoE assurance for multimedia applications in C...

To support large-scale live Internet broadcasting services efficiently in content delivery networks (CDNs), it is essential to exploit peer-to-peer capabilities among end users. This way, the access bandwidth demand on CDN servers in the overlay backbone can be largely reduced. Such a streaming infrastructure gives rise to a challenging overlay backbone multicast routing problem (OBMRP) to opti...

Content Delivery Networks (CDNs) are becoming an integral part of the future generation Internet. Traditionally, these networks have been designed with the goals of traffic offload and the improvement of users’ quality of experience (QoE), but the energy consumption is also becoming an indispensable design factor for CDNs to be a sustainable solution. To study and improve the CDN architectures ...

The scalable and bandwidth-efficient delivery of IPTV services to an increasingly diverse set of screens requires the deployment of telco content distribution networks (CDNs). These CDNs are composed of cache servers located in the telco’s data centers close to the end user. The additional cache servers need to be designed for energy efficiency to limit the increase of data-center energy consum...

We present the implementation of a large-scale latency estimation system based on GNP and incorporated into the Google content delivery network. Our implementation employs standard features of contemporary Web clients, and carefully controls the overhead incurred by latency measurements using a scalable centralized scheduler. It also requires only a small number of CDN modifications, which make...

Joel Wein described Akamai’s Content Distribution Network (CDN) as having 15,000 servers in 1,100 third-party networks, with a NOCC managed by a day crew of eight and a night crew of three. The focus of this paper is not on CDN but on Akamai’s experience in its seven-year experiment: in particular, keeping its distributed system running using Recovery Oriented Computing. In a single day, it is ...

Video-on-demand (VOD) is designed by using content delivery networks (CDN) to minimize the overall operational cost and to maximize scalability. Estimation of the viewing pattern (i.e., the relationship between the number of viewings and the ranking of VOD contents) plays an important role in minimizing the total operational cost and maximizing the performance of the VOD systems. In this paper,...

A constellation of Content Delivery Networks (CDNs), termed as peering CDNs, endeavors to guarantee adequate delivery performance when the incoming request load is overwhelming for a single provider alone. Each user is served by an optimal Web server in terms of network cost, even under heavy load conditions. Before it could be comprehended, appropriate resource discovery and request-redirectio...