Value-added services (e.g., overlaid video advertisements) have become an integral part of today’s Content Delivery Networks (CDNs). To offer cost-efficient, scalable and more agile provisioning of new value-added services in CDNs, Network Functions Virtualization (NFV) paradigm may be leveraged to allow implementation of fine-grained services as a chain of Virtual Network Functions (VNFs) to b...

The paper proposed the research on rural online distance education (RODE) based on the Beijing rural network condition, which aimed at helping farmers to get agricultural technology more effectively and sufficiently. This is the first platform that was applied to large-scale rural distance education, which combined with peer to peer (P2P) and content delivery network(CDN). What’s more, it initi...

The exploding HD video streaming traffic calls for deploying content servers deeper inside network operators infrastructures. Telco-CDN are new content distribution services that are managed by Internet Service Providers (ISP). Since the network operator controls both the infrastructure and the content delivery overlay, it is in position to engineer Telco-CDN so that networking resources are op...

Content Delivery Networks (CDN) design entails the placement of server replicas to bring the content close to the users, together with an efficient and content aware request routing. In this paper we address the problem of dynamic replica placement to account for users demand variability while optimizing the costs paid by a CDN provider and the overall performance of the distributed replica ser...

This document reports experimental results on the delivery of HTTP Adaptive Streaming (HAS) content over interconnected Content Delivery Networks (CDNs). Specifically, the implications of CDN request routing between CDNs and HTTP redirection on the quality of delivered HAS content are investigated.

It is known that a group-based system provides better performance and more scalability to the whole system while it decreases the communication traffic. Group-based architectures in Content Delivery Networks (CDNs) could be a good solution to the need of scalability or when the bandwidth is a limitation. There is no pure group-based CDN in existence, although we proposed a group-based system to...

We are in the midst of an Internet computing revolution. One vision of 21st century computing is that users will access Internet services and ‘‘resource-hungry’’ applications (e.g. gaming, streaming media, video on demand, and voice-over-IP) over lightweight portable devices rather than through some descendant of the traditional desktop PCs. In this context, distributing and processing Internet...

This article describes the experiences of the Care Delivery Network (CDN) Project, particularly as they relate to the diffusion of knowledge in healthcare settings. After outlining the history of the CDN Project, several propositions are tested and findings presented. The CDN’s experience suggests that for innovations to be voluntarily adopted by health service delivery organizations dispersed ...

CDNs have been widely used to provide low latency, scalability, fault tolerance, and load balancing for the delivery of web content and more recently streaming media. We propose a system that improves the performance of streaming media CDNs by exploiting the path diversity provided by existing CDN infrastructure. Path diversity is provided by the different network paths that exist between a cli...