Evolution of the control plane for future content distribution services

Abstract : Content Distribution Services are evolving fast in various directions. One of them is the federation of CDNs, referring to a number of CDN providers putting together their assets and acting as a single entity with regards to content providers. We introduce a technical solution based on a centralized architecture that allows taking static decisions of federation establishment and provisioning and dynamic decisions of federation control. Static decision-making is enabled through an optimization model that we apply to concrete use cases of federation. We demonstrate that, in case of high market demand, CDN providers always have an interest in federating. In particular, some CDN providers can double their economic gains through federating. In the context of federation dynamic control, we focus on the control of peak events within a federation of CDNs and we introduce different control frameworks at this level. We conduct trace-driven simulations in order to assess different frameworks. We demonstrate that, when a joint approach for events control is adopted within a federation of CDNs, the federation is better resilient to peak events. This translates into a higher hit ratio of the federation and a better video resolution witnessed by end users. Our work on CDN federation leads us to focus on the role of a Telco in this context. In particular, we identify three added-value services that can be proposed by a Telco to a federation of CDNs or to individual Over the Tops (OTTs).We suggest enhancements of the Telco control infrastructure and new Telco APIs in order to enable the proposed services.
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Ghida Ibrahim. Evolution of the control plane for future content distribution services. Networking and Internet Architecture [cs.NI]. Télécom ParisTech, 2014. English. ⟨NNT : 2014ENST0032⟩. ⟨tel-01541925⟩

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