TY - JOUR
T1 - Spectrum Defragmentation in Elastic Optical Networks
T2 - Two Approaches with Metaheuristics
AU - Davalos, Enrique J.
AU - Romero, Matilde F.
AU - Galeano, Sergio M.
AU - Baez, Diego A.
AU - LEIVA LOPEZ, ARIEL EDGARDO
AU - Baran, Benjamin
N1 - Publisher Copyright:
© 2013 IEEE.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2019
Y1 - 2019
N2 - This work introduces two novel approaches for the selection of active lightpaths that perform a spectrum defragmentation process in elastic optical networks (EONs). The algorithms, named DF-Ants and DF-Gen, are based on ant colony optimization and genetic metaheuristics, respectively, and their objective is to minimize the fragmentation of the entire network, evaluated with two different fragmentation metrics. In this way, the blocking probability is expected to be minimized with the fewest number of reconfigured possible connections. Furthermore, a new performance metric for spectrum defragmentation is also presented, named weighted blocking rate (WBR). Unicast traffic simulations were conducted, showing the feasibility of the proposal.
AB - This work introduces two novel approaches for the selection of active lightpaths that perform a spectrum defragmentation process in elastic optical networks (EONs). The algorithms, named DF-Ants and DF-Gen, are based on ant colony optimization and genetic metaheuristics, respectively, and their objective is to minimize the fragmentation of the entire network, evaluated with two different fragmentation metrics. In this way, the blocking probability is expected to be minimized with the fewest number of reconfigured possible connections. Furthermore, a new performance metric for spectrum defragmentation is also presented, named weighted blocking rate (WBR). Unicast traffic simulations were conducted, showing the feasibility of the proposal.
KW - Ant colony optimization
KW - elastic optical networks
KW - genetic algorithms
KW - metaheuristics
KW - spectrum defragmentation
UR - http://www.scopus.com/inward/record.url?scp=85097343762&partnerID=8YFLogxK
U2 - 10.1109/ACCESS.2019.2937032
DO - 10.1109/ACCESS.2019.2937032
M3 - Article
AN - SCOPUS:85097343762
VL - 7
SP - 119835
EP - 119843
JO - IEEE Access
JF - IEEE Access
SN - 2169-3536
M1 - 8811468
ER -