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Based on a convergence of network technologies, the Next Generation Network (NGN) is being deployed to carry high quality video and voice data. In fact, the convergence of network technologies has been driven by the converging needs of end-users. The perceived end-to-end quality is becoming one of the main goals required by users that must be guaranteed by the network operators and the Internet Service Providers, through manufacturer equipment. This is referred to as the notion of Quality of Experience (QoE) and is becoming commonly used to represent user perception. The QoE is not a technical metric, but rather a concept consisting of all elements of a user's perception of the network services. In this book, the Authors focus on the idea of how to integrate the QoE into a control- command chain in order to construct an adaptive network system. More precisely, in the context of Content-Oriented Networks (CON) that is used to redesign the current Internet architecture to accommodate content-oriented applications and services, we apply the end-to-end QoE model to a Content Distribution Network architecture.