International Journal of Computer Networks and Applications

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Protected Light-Tree Reconfiguration Without Flow Interruption in Elastic Optical Networks


Affiliations
1 Computer and Telecommunications Research Laboratory, National Institut Félix Houphouët Boigny, Yamoussoukro, Côte d'Ivoire
2 Digital Research and Development Unit, Virtual University of Ivory Coast, Abidjan, Côte d'Ivoire
3 National Institut Félix Houphouët Boigny, Yamoussoukro, Côte d'Ivoire
 

Reconfiguration is one of the most important capabilities of optical networks. This task is performed by operators to re-optimize network resource utilization. Multicast applications such as videoconference online learning, etc., emerge rapidly and cause an increase in bandwidth demand. A multicast connection in an optical network is provided by a light-tree. Due to physical link failures, light-trees are protected by backup paths. Thus, our study focuses on the reconfiguration of a protected light-tree. The reconfiguration problem studied here is to migrate rapidly an optical flow from an old light-tree to a new light-tree without service disruption. To solve this problem, we propose a mechanism based on dependencies graphs. This method establishes simultaneously groups of the final light-tree branches by using shared backup paths spectrum resources. The numerical results show that our approach avoids flow interruptions and reduce significantly the number of steps required to achieve the reconfiguration process more than existing methods.

Keywords

Optical Network, Reconfiguration, Multicast, Protection, Survivable, Light-Tree.
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  • Protected Light-Tree Reconfiguration Without Flow Interruption in Elastic Optical Networks

Abstract Views: 287  |  PDF Views: 2

Authors

N’takpe N’guessan Christian
Computer and Telecommunications Research Laboratory, National Institut Félix Houphouët Boigny, Yamoussoukro, Côte d'Ivoire
Adepo Joel Christian
Digital Research and Development Unit, Virtual University of Ivory Coast, Abidjan, Côte d'Ivoire
Babri Michel
National Institut Félix Houphouët Boigny, Yamoussoukro, Côte d'Ivoire

Abstract


Reconfiguration is one of the most important capabilities of optical networks. This task is performed by operators to re-optimize network resource utilization. Multicast applications such as videoconference online learning, etc., emerge rapidly and cause an increase in bandwidth demand. A multicast connection in an optical network is provided by a light-tree. Due to physical link failures, light-trees are protected by backup paths. Thus, our study focuses on the reconfiguration of a protected light-tree. The reconfiguration problem studied here is to migrate rapidly an optical flow from an old light-tree to a new light-tree without service disruption. To solve this problem, we propose a mechanism based on dependencies graphs. This method establishes simultaneously groups of the final light-tree branches by using shared backup paths spectrum resources. The numerical results show that our approach avoids flow interruptions and reduce significantly the number of steps required to achieve the reconfiguration process more than existing methods.

Keywords


Optical Network, Reconfiguration, Multicast, Protection, Survivable, Light-Tree.

References





DOI: https://doi.org/10.22247/ijcna%2F2021%2F209185