Fábio Barbosa, Amaro de Sousa and Agostinho Agra, from the Applied Mathematics group, IT in Aveiro, won the Best Paper Award in the 10th International Workshop on Resilient Networks Design and Modeling – RNDM 2018. The event took place in Longyearbyen, Norway, from 27 to 29 of last August.
The paper is entitled “Topology Design of Transparent Optical Networks Resilient to Multiple Node Failures” and deals with the design of transparent optical networks to be resilient to large-scale failures. Large-scale failures are assumed as multiple node failures/shutdowns and the resiliency metric is the number of network nodes that can still be optically connected when the set of critical nodes fail simultaneously. The paper presents a method to design transparent optical networks which are resilient to multiple node failures and the method is also extended to be used to upgrade existing optical networks. The paper compares the resilience between current network topologies, or best upgraded solutions, with the best network topologies obtained with the same total fiber length. The comparisons show that the resiliency difference of existing topologies is significantly larger in the best ones.
Nevertheless, most importantly for the optical network operators, network upgrades of 10% of the total fiber length can significantly reduce the resiliency difference provided that such upgrades are aimed at maximizing the network resilience to multiple node failures.
This paper is based upon work from COST Action CA15127 (“Resilient communication services protecting end user applications from disaster-based failures – RECODIS”), supported by COST (European Cooperation in Science and Technology) and from project CENTRO-01-0145-FEDER-029312 (ResNeD) supported by FEDER Funds and National Funds through FCT (Fundação para a Ciência e a Tecnologia), Portugal.
On the Photo (from left to right): Agostinho Agra, Fábio Barbosa and Amaro de Sousa