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Flexible and efficient CDNs are critical to facilitate content distributionin 5G+ architectures. Current CDNs suffer from inefficient request mappingbased on DNS redirection, and inefficient content distribution from origin toedge servers, through content reflection. We proposes a novel, flexible CDNarchitecture that removes the need for DNS-based mapping and contentreflection. Instead, requests to/from the CDN are treated as servicetransactions in the network, which utilises a routing function embraced fromemerging research in Information-Centric Networks (ICN) to route edge-to-edgetransactions to the true nearest service point. The same function is utilizedto establish path-based flows over a fast forwarding substrate; thereby,eliminating the need for IP routing between service points within a singledomain, and potentially at peering points with other domains. We model ourarchitecture and formulate the resource placement problem as a variance of theK-center problem. To address the problem, we propose a greedy algorithm, Swing,that balances the placement of service points between highly and poorlyconnected nodes. We evaluate the efficiency of our architecture in utilisingthe CDN and network resources through Monte Carlo simulations that explore arange of K values. Moreover, we compare the goodness of the placement solutionsprovided by Swing with those provided by Largest First and Closest FirstAlgorithms. Evaluation results show the superiority of our fCDN solution inreducing the edge-to-edge path length and the required network resources.

fCDN: A Flexible and Efficient CDN Infrastructure without DNS Redirection or Content Reflection