DocumentCode :
2085236
Title :
Bandwidth defragmentation in dynamic elastic optical networks with minimum traffic disruptions
Author :
Mingyang Zhang ; Weiran Shi ; Long Gong ; Wei Lu ; Zuqing Zhu
Author_Institution :
Sch. of Inf. Sci. & Technol., Univ. of Sci. & Technol. of China, Hefei, China
fYear :
2013
fDate :
9-13 June 2013
Firstpage :
3894
Lastpage :
3898
Abstract :
Bandwidth defragmentation, i.e., the operation to reconfigure existing connections for making the spectrum usage less fragmented and less misaligned, has recently been recognized as one of the most important features for elastic optical networks (EONs). In this paper, we propose a novel comprehensive bandwidth defragmentation algorithm that considers the problems of 1) When to defragment? 2) What for defragment? and 3) How to defragment? jointly. The proposed algorithm accomplishes defragmentation through proactive network reconfiguration that only reroutes a portion of existing connections. In each defragmentation operation, we first choose the connections to reroute using a selection strategy, then determine how to reroute them with the defragmentation based routing and spectrum assignment (DF-RSA), and finally perform rerouting with best-effort traffic migration to minimize traffic disruptions. Simulation results indicate that in order to make the bandwidth blocking probability (BBP) comparable with that from the Greenfield scenario (100% rerouting all the time), the proposed algorithm only needs to reroute ~30% existing connections. The simulations also demonstrate that the traffic disruption percentages are less than 1% for defragmentations with 30% rerouting and can be further reduced to within 0.25% by adding a move-to-vacancy (MTV) approach in the traffic migration.
Keywords :
optical communication; telecommunication network routing; telecommunication traffic; BBP; DF-RSA; EON; Greenfield scenario; MTV approach; bandwidth blocking probability; bandwidth defragmentation algorithm; defragmentation based routing and spectrum assignment; dynamic elastic optical network; move-to-vacancy approach; proactive network reconfiguration; traffic disruption; traffic migration; Bandwidth; Heuristic algorithms; Indexes; Optical fiber networks; Optical wavelength conversion; Routing; Simulation; Bandwidth defragmentation; Elastic optical networks (EONs); Traffic disruption; Traffic migration;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications (ICC), 2013 IEEE International Conference on
Conference_Location :
Budapest
ISSN :
1550-3607
Type :
conf
DOI :
10.1109/ICC.2013.6655165
Filename :
6655165
Link To Document :
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