  Content Delivery Networks (CDNs) are becoming an integral part of the future
generation Internet. Traditionally, these networks have been designed with the
goals of traffic offload and the improvement of users' quality of experience
(QoE), but the energy consumption is also becoming an indispensable design
factor for CDNs to be a sustainable solution. To study and improve the CDN
architectures using this new design metric, we are planning to develop a
generic and flexible simulation package in OMNet++. This package is aimed to
render a holistic view about the CDN energy consumption behaviour by
incorporating the state-of-the-art energy consumption models proposed for the
individual elements of CDNs (e.g. servers, routers, wired and wireless links,
wireless devices, etc.) and for the various Internet contents (web pages,
files, streaming video, etc.).
