Enabling multimedia adaptation services in content delivery networks

Content delivery networks (CDNs) provide a large number of caches and storage devices at the edge of network to push content closer to the user. To cope with the growing diversity and heterogeneity of the Internet, these edge nodes offer a natural place to extend the capability of network intermediaries for content-oriented processing such as content adaptation for small devices, personalization, and location-aware data insertion. In this paper, we present our investigation on developing a service overlay network out top of CDNs for delivering content-oriented web services. Our goal is to make the rich content services part of the Internet infrastructure services accessible to content providers and content consumers. A prototype system is reported in the paper, and the experimental results of deploying this system in our corporate network are also discussed.