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Published in: Photonic Network Communications 3/2020

25-07-2020 | Original Paper

Experimental evaluation of dynamic resource orchestration in multi-layer (packet over flexi-grid optical) networks

Authors: Silvia Fichera, Barbara Martini, Ricardo Martínez, Molka Gharbaoui, Ramon Casellas, Ricard Vilalta, Raul Muñoz, Piero Castoldi

Published in: Photonic Network Communications | Issue 3/2020

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Abstract

Network services in 5G will be rolled out as pools of virtual network functions (VNFs) exploiting the advantages of both software-defined networking and network function virtualization. In this context, 5G network services are envisaged as ordered sequences of VNFs resulting in the so-called VNF Forwarding Graphs (VNFFGs). Such VNFs can be allocated over a number of distributed but interconnected data centers (DCs). In this work, a cloud/network orchestrator is discussed to dynamically process and accommodate VNFFG requests over a pool of DCs interconnected by a multi-layer (packet/flexi-grid optical) transport network infrastructure. Two different cloud and network resource allocation algorithms are proposed aiming at: (1) minimizing the distance between the selected DCs and (2) minimizing the load (i.e., consumed cloud resources) of the chosen DCs. In the performance evaluation, the proposed algorithms are experimentally validated and compared on the CTTC ADRENALINE testbed.
Footnotes
1
The MANO functions and the NFVO are not explicitly shown in the setup, since their functions that are relevant in this work, i.e., VNFFG request processing and WIM function, are realized by the Allocator that is particularly focused on the dynamic network resource selection and allocation process. Similarly, the DC infrastructure and the VIM functions have not been actually deployed yet emulated.
 
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Metadata
Title
Experimental evaluation of dynamic resource orchestration in multi-layer (packet over flexi-grid optical) networks
Authors
Silvia Fichera
Barbara Martini
Ricardo Martínez
Molka Gharbaoui
Ramon Casellas
Ricard Vilalta
Raul Muñoz
Piero Castoldi
Publication date
25-07-2020
Publisher
Springer US
Published in
Photonic Network Communications / Issue 3/2020
Print ISSN: 1387-974X
Electronic ISSN: 1572-8188
DOI
https://doi.org/10.1007/s11107-020-00899-4