Energy Efficient Content Distribution

Julio Araujo 1, 2 Frédéric Giroire 2, 1 Yaning Liu 3 Remigiusz Modrzejewski 2, 1 Joanna Moulierac 2, 1
1 COATI - Combinatorics, Optimization and Algorithms for Telecommunications
CRISAM - Inria Sophia Antipolis - Méditerranée , Laboratoire I3S - COMRED - COMmunications, Réseaux, systèmes Embarqués et Distribués
2 MASCOTTE - Algorithms, simulation, combinatorics and optimization for telecommunications
CRISAM - Inria Sophia Antipolis - Méditerranée , Laboratoire I3S - COMRED - COMmunications, Réseaux, systèmes Embarqués et Distribués
Abstract : To optimize energy efficiency in network, operators try to switch off as many network devices as possible. Recently, there is a trend to introduce content caches as an inherent capacity of network equipment, with the objective of improving the efficiency of content distribution and reducing network congestion. In this work, we study the impact of using in-network caches and content delivery network (CDN) cooperation on an energy-efficient routing. We formulate this problem as Energy Efficient Content Distribution. The objective is to find a feasible routing, so that the total energy consumption of the network is minimized subject to satisfying all the demands and link capacity. We exhibit the range of parameters (size of caches, popularity of content, demand intensity, etc.) for which caches are useful. Experimental results show that by placing a cache on each backbone router to store the most popular content, along with well choosing the best content provider server for each demand to a CDN, we can save a total up to 23% of power in the backbone, while 16% can be gained solely thanks to caches.
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Julio Araujo, Frédéric Giroire, Yaning Liu, Remigiusz Modrzejewski, Joanna Moulierac. Energy Efficient Content Distribution. IEEE International Conference on Communications (ICC), Jun 2013, Budapest, Hungary. pp.4233-4238, ⟨10.1109/ICC.2013.6655228⟩. ⟨hal-00800273⟩

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