Joint content placement and lightpath routing and spectrum assignment in CDNs over elastic optical network scenarios
Visualitza/Obre
10.1016/j.comcom.2015.12.002
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/86090
Tipus de documentArticle
Data publicació2016-03-01
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
In this work, we address the problem of jointly deciding the placement of the contents delivered by a Content Distribution Network (CDN) among the available data centers, together with the allocation of the lightpaths required to serve the anycast demands initiated by the CDN network users, assuming an underlying highcapacity Elastic Optical Network (EON). We firstly present an Integer Linear Programming (ILP) formulation to optimally solve the targeted problem. This ILP formulation is of high complexity, though, and cannot be used to solve realistically sized problem instances. Hence, we also introduce a novel heuristic called CPRMSAPD, which decomposes the problem into three sub-problems and applies greedy heuristics and simulated annealing meta-heuristic techniques to yield accurate solutions with practical execution times. We validate the performance of our CPRMSA-PD heuristic in medium-sized problem instances by comparing its results to the ones of the optimal ILP formulation. Next, we use it to give extensive insights into the effects of different key parameters identified in large CDN over EON backbone networks.
Descripció
© 2015 Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
CitacióPerelló, J., Walkowiak, K., Klinkowski, M., Spadaro, S., Careglio, D. Joint content placement and lightpath routing and spectrum assignment in CDNs over elastic optical network scenarios. "Computer communications", 01 Març 2016, vol. 77, p. 72-84.
ISSN0140-3664
Versió de l'editorhttp://www.sciencedirect.com/science/article/pii/S0140366415004600
Col·leccions
- Departament d'Arquitectura de Computadors - Articles de revista [1.049]
- Departament de Teoria del Senyal i Comunicacions - Articles de revista [2.526]
- GCO - Grup de Comunicacions Òptiques - Articles de revista [238]
- CBA - Sistemes de Comunicacions i Arquitectures de Banda Ampla - Articles de revista [154]
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